/* ==========================================================================
   Chrono Hub - Unified Design System & Styling
   Zero Emojis - Pure SVG and Precision Typography
   ========================================================================== */

:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    --font-display: "Segoe UI", -apple-system, sans-serif;
    
    /* Default Light Theme */
    --bg-base: #f1f5f9;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f8fafc;
    --bg-surface-hover: #e2e8f0;
    --border-subtle: #e2e8f0;
    --border-strong: #cbd5e1;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-glow: rgba(2, 132, 199, 0.15);
    
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.25);
    
    --card-shadow: 0 4px 15px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -2px rgba(0, 0, 0, 0.04);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    
    --clock-face: #ffffff;
    --clock-border: #cbd5e1;
    --clock-marks: #475569;
    --clock-hands: #0f172a;
    --clock-second: #e11d48;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-base: #f1f5f9;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f8fafc;
    --bg-surface-hover: #e2e8f0;
    --border-subtle: #e2e8f0;
    --border-strong: #cbd5e1;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-glow: rgba(2, 132, 199, 0.15);
    
    --card-shadow: 0 4px 15px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -2px rgba(0, 0, 0, 0.04);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    
    --clock-face: #ffffff;
    --clock-border: #cbd5e1;
    --clock-marks: #475569;
    --clock-hands: #0f172a;
    --clock-second: #e11d48;
}

[data-theme="dark"] {
    --bg-base: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-elevated: #334155;
    --bg-surface-hover: #475569;
    --border-subtle: #334155;
    --border-strong: #475569;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-glow: rgba(56, 189, 248, 0.25);
    
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
    
    --clock-face: #1e293b;
    --clock-border: #475569;
    --clock-marks: #94a3b8;
    --clock-hands: #f8fafc;
    --clock-second: #ef4444;
}

[data-theme="midnight"] {
    --bg-base: #060814;
    --bg-surface: #0f1424;
    --bg-surface-elevated: #1a223a;
    --bg-surface-hover: #263354;
    --border-subtle: #1c2642;
    --border-strong: #2b3b64;
    
    --text-primary: #e2e8f0;
    --text-secondary: #8da2c0;
    --text-muted: #536585;
    
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.3);
    
    --clock-face: #0f1424;
    --clock-border: #2b3b64;
    --clock-marks: #8da2c0;
    --clock-hands: #e2e8f0;
    --clock-second: #38bdf8;
}

[data-theme="cyberpunk"] {
    --bg-base: #050508;
    --bg-surface: #0e0e17;
    --bg-surface-elevated: #1a1a2e;
    --bg-surface-hover: #272744;
    --border-subtle: #272744;
    --border-strong: #00f3ff;
    
    --text-primary: #00f3ff;
    --text-secondary: #ff007f;
    --text-muted: #7979a0;
    
    --accent: #00f3ff;
    --accent-hover: #38ffff;
    --accent-glow: rgba(0, 243, 255, 0.4);
    
    --clock-face: #0e0e17;
    --clock-border: #00f3ff;
    --clock-marks: #ff007f;
    --clock-hands: #00f3ff;
    --clock-second: #ffe600;
}

[data-theme="minimal"] {
    --bg-base: #000000;
    --bg-surface: #111111;
    --bg-surface-elevated: #222222;
    --bg-surface-hover: #333333;
    --border-subtle: #222222;
    --border-strong: #444444;
    
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --text-muted: #666666;
    
    --accent: #ffffff;
    --accent-hover: #dddddd;
    --accent-glow: rgba(255, 255, 255, 0.2);
    
    --clock-face: #000000;
    --clock-border: #333333;
    --clock-marks: #888888;
    --clock-hands: #ffffff;
    --clock-second: #ffffff;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    outline: none;
}

input, select, textarea {
    font-family: inherit;
    color: inherit;
}

.icon {
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
   
    top: 0;
    z-index: 100;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent), #6366f1);
    color: #ffffff;
    box-shadow: 0 2px 10px var(--accent-glow);
}

.brand-text h1,
.brand-text .brand-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--text-primary);
}

.brand-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.action-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
    border-color: var(--border-strong);
}

.theme-dropdown {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 0.35rem 0.65rem;
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
}

.theme-dropdown:hover {
    border-color: var(--border-strong);
}

/* Nav Bar Tabs */
.nav-scroll-container {
    overflow-x: auto;
    scrollbar-width: thin;
    padding: 0 1rem;
    background: rgba(0, 0, 0, 0.1);
}

.nav-scroll-container::-webkit-scrollbar {
    height: 3px;
}
.nav-scroll-container::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: var(--radius-full);
}

.nav-tabs {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 0.25rem;
    min-width: max-content;
    padding: 0.35rem 0;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

.nav-link.active {
    color: var(--accent);
    background: var(--bg-surface);
    border-bottom: 2px solid var(--accent);
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* Navigation Dropdown Menu (More) */
.nav-item-dropdown {
    position: relative;
    list-style: none;
}

.nav-dropdown-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-dropdown-btn .icon-chevron {
    transition: transform 0.2s ease;
    margin-left: 0.15rem;
}

.nav-item-dropdown:hover .nav-dropdown-btn .icon-chevron,
.nav-item-dropdown.is-open .nav-dropdown-btn .icon-chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    min-width: 220px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 0.4rem;
    list-style: none;
    display: none;
    z-index: 1000;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.85rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.dropdown-item:hover {
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
}

.dropdown-item.active {
    color: var(--accent);
    background: var(--bg-surface-elevated);
    font-weight: 600;
}

.dropdown-item .icon {
    flex-shrink: 0;
    color: var(--accent);
}

/* Desktop Hover Interaction */
@media (min-width: 901px) {
    .nav-scroll-container {
        overflow: visible;
    }
    
    .nav-item-dropdown:hover .nav-dropdown-menu,
    .nav-item-dropdown:focus-within .nav-dropdown-menu,
    .nav-item-dropdown.is-open .nav-dropdown-menu {
        display: flex;
        flex-direction: column;
        gap: 0.2rem;
        animation: dropdownFadeIn 0.15s ease-out;
    }

    @keyframes dropdownFadeIn {
        from { opacity: 0; transform: translateY(-4px); }
        to { opacity: 1; transform: translateY(0); }
    }
}

.menu-toggle-btn {
    display: none;
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
}

.tool-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
}

.tool-title-group h1,
.tool-title-group h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.tool-title-group p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.tool-controls-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
    box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}
.btn-secondary:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--border-strong);
}

.btn-danger {
    background: var(--danger);
    color: #ffffff;
    box-shadow: 0 2px 8px var(--danger-glow);
}
.btn-danger:hover {
    filter: brightness(1.1);
}

.btn-success {
    background: var(--success);
    color: #ffffff;
    box-shadow: 0 2px 8px var(--success-glow);
}

.btn-sm {
    padding: 0.35rem 0.7rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.75rem 1.6rem;
    font-size: 1.05rem;
}

.btn-icon {
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* Card Container */
.chrono-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

/* ==========================================================================
   Tool 1: Analog Clock Styles
   ========================================================================== */
.analog-clock-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 0;
    position: relative;
}

.clock-stage {
    position: relative;
    width: min(380px, 100%);
    height: auto;
    aspect-ratio: 1 / 1;
    max-width: 100%;
    margin: 1rem auto;
    filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.45));
}

.analog-controls-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.analog-controls-bar > div {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

@media (max-width: 640px) {
    .analog-controls-bar {
        gap: 0.5rem;
    }
    .analog-controls-bar > div {
        width: 100%;
        justify-content: space-between;
    }
    .analog-controls-bar .form-select {
        flex: 1;
        max-width: 62%;
    }
    .analog-controls-bar #btn-toggle-tick {
        width: 100%;
        justify-content: center;
    }
}

.analog-svg {
    width: 100%;
    height: 100%;
}

.clock-subdial {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
    background: rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
}

.analog-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
}

.analog-digital-badge {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
    padding: 0.35rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    margin-top: 0.75rem;
}

/* Clock Dial Themes */
.face-classic { --face-bg: #1e293b; --mark-color: #cbd5e1; --hand-color: #f8fafc; }
.face-minimal { --face-bg: #0f172a; --mark-color: #475569; --hand-color: #ffffff; }
.face-roman { --face-bg: #172554; --mark-color: #93c5fd; --hand-color: #f0f9ff; }
.face-station { --face-bg: #f8fafc; --mark-color: #0f172a; --hand-color: #0f172a; }

/* ==========================================================================
   Tool 2: Digital Clock Styles
   ========================================================================== */
.digital-clock-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    background: #090d16;
    border: 1px solid #1e293b;
    border-radius: var(--radius-lg);
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.digital-time-main {
    font-family: var(--font-mono);
    font-size: clamp(3rem, 10vw, 7.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1;
    display: flex;
    align-items: baseline;
    justify-content: center;
    text-shadow: 0 0 25px var(--accent-glow);
    color: var(--accent);
}

/* Classic Black (LCD Style) */
[data-dig-color="black"].digital-clock-display {
    background: #e2e8f0 !important;
    border: 1px solid #94a3b8 !important;
    box-shadow: inset 0 2px 14px rgba(0, 0, 0, 0.15) !important;
}

[data-dig-color="black"] .digital-time-main {
    color: #000000 !important;
    text-shadow: none !important;
}

[data-dig-color="black"] .digital-colon {
    color: #000000 !important;
}

[data-dig-color="black"] .digital-ampm {
    color: #1e293b !important;
}

[data-dig-color="black"] .digital-millis {
    color: #475569 !important;
}

[data-dig-color="black"] .digital-date-bar {
    color: #334155 !important;
}

[data-dig-color="black"] .digital-metric-pill {
    background: rgba(0, 0, 0, 0.07) !important;
    color: #1e293b !important;
    border: 1px solid rgba(0, 0, 0, 0.12) !important;
}

[data-dig-color="black"] .digital-metric-pill svg {
    color: #0f172a !important;
}

[data-dig-color="black"] .progress-meta {
    color: #334155 !important;
}

[data-dig-color="black"] .progress-track {
    background: #cbd5e1 !important;
}

[data-dig-color="black"] .progress-fill {
    background: #0f172a !important;
}

.digital-colon {
    animation: colonBlink 1s infinite steps(1);
    opacity: 1;
    margin: 0 0.1em;
}

@keyframes colonBlink {
    50% { opacity: 0.25; }
}

.digital-ampm {
    font-size: clamp(1.2rem, 3vw, 2.2rem);
    margin-left: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.digital-millis {
    font-size: clamp(1.2rem, 3.5vw, 2.8rem);
    color: var(--text-muted);
    margin-left: 0.35rem;
}

.digital-date-bar {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-top: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.digital-metric-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.65rem;
    background: var(--bg-surface-elevated);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.year-progress-container {
    width: 100%;
    max-width: 500px;
    margin-top: 1.75rem;
}

.progress-track {
    width: 100%;
    height: 8px;
    background: var(--bg-surface-elevated);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

.progress-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

/* ==========================================================================
   Tool 3: World Clock Styles
   ========================================================================== */
.world-clock-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-top: 1.25rem;
}

.city-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.city-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.city-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.city-card-name {
    font-size: 1.15rem;
    font-weight: 700;
}

.city-card-region {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.city-card-time {
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-primary);
}

.city-card-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.city-badge-bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.85rem;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--bg-surface-elevated);
    color: var(--text-secondary);
}

.badge-day {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.badge-night {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.badge-open {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.badge-closed {
    background: rgba(100, 116, 139, 0.2);
    color: #94a3b8;
}

.world-scrubber-box {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.scrubber-slider {
    width: 100%;
    margin: 0.75rem 0;
    accent-color: var(--accent);
}

#city-search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    max-height: 260px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

.search-item {
    transition: background-color 0.15s ease;
}

.search-item:hover:not(.is-added) {
    background-color: var(--border-subtle);
}

/* ==========================================================================
   Tool 4: Flip Clock Styles (3D Split Flap)
   ========================================================================== */
.flip-clock-fullscreen-container {
    position: relative;
    width: 100%;
}

.world-clock-fullscreen-wrapper {
    position: relative;
    width: 100%;
}

.timer-fullscreen-wrapper {
    position: relative;
    width: 100%;
}

/* Flip Clock Toolbar */
.flip-clock-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.flip-toolbar-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.flip-toolbar-theme {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

@media (max-width: 640px) {
    .flip-clock-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        margin-bottom: 1.25rem;
        padding-bottom: 0.75rem;
    }
    .flip-toolbar-buttons {
        justify-content: center;
    }
    .flip-toolbar-theme {
        justify-content: center;
    }
}

.flip-clock-board {
    --card-w: clamp(34px, 8.8vw, 68px);
    --card-h: calc(var(--card-w) * 1.41);
    --card-font: calc(var(--card-w) * 0.88);
    --card-colon: calc(var(--card-w) * 0.75);
    --card-gap: clamp(2px, 0.8vw, 6px);
    --group-gap: clamp(4px, 1.6vw, 12px);

    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--group-gap);
    padding: 2rem 0.5rem;
    flex-wrap: nowrap;
    max-width: 100%;
    box-sizing: border-box;
}

@media (min-width: 768px) {
    .flip-clock-board {
        --card-w: 90px;
        --card-h: 128px;
        --card-font: 4.8rem;
        --card-colon: 3.5rem;
        --card-gap: 6px;
        --group-gap: 16px;
        padding: 3rem 1rem;
    }
}

.flip-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(0.2rem, 1vw, 0.5rem);
    min-width: 0;
}

.flip-group-cards {
    display: flex;
    gap: var(--card-gap);
}

.flip-label {
    font-size: clamp(0.62rem, 1.8vw, 0.8rem);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    color: var(--text-muted);
}

.flip-card {
    position: relative;
    width: var(--card-w);
    height: var(--card-h);
    font-family: var(--font-mono);
    font-size: var(--card-font);
    font-weight: 700;
    line-height: var(--card-h);
    text-align: center;
    perspective: 400px;
    border-radius: clamp(3px, 0.8vw, 6px);
}

.flip-card-top, .flip-card-bottom {
    position: absolute;
    left: 0;
    width: 100%;
    height: 50%;
    overflow: hidden;
    background: #18181b;
    color: #f4f4f5;
    border-radius: clamp(3px, 0.8vw, 6px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .flip-card-top, 
[data-theme="light"] .flip-card-bottom {
    background: #27272a;
    color: #fafafa;
}

.flip-card-top {
    top: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.7);
    line-height: var(--card-h);
}

.flip-card-bottom {
    bottom: 0;
    line-height: 0px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.flip-card-divider {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: clamp(1px, 0.3vw, 2px);
    transform: translateY(-50%);
    background: #09090b;
    z-index: 10;
}

.flip-colon {
    font-family: var(--font-mono);
    font-size: var(--card-colon);
    font-weight: 700;
    color: var(--text-muted);
    align-self: center;
    margin: 0;
    line-height: 1;
}

.flip-date-row {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    gap: clamp(0.4rem, 2vw, 1rem);
    flex-wrap: wrap;
    --date-h: clamp(44px, 12vw, 60px);
}

.flip-card-date, .flip-card-month, .flip-card-year {
    height: var(--date-h);
    line-height: var(--date-h);
}

.flip-card-date {
    width: clamp(55px, 15vw, 75px);
    font-size: clamp(1.4rem, 4.5vw, 2rem);
}
.flip-card-date .flip-card-top { line-height: var(--date-h); }
.flip-card-date .flip-card-bottom { line-height: 0px; }

.flip-card-month {
    width: clamp(75px, 20vw, 100px);
    font-size: clamp(1.1rem, 3.8vw, 1.6rem);
}
.flip-card-month .flip-card-top { line-height: var(--date-h); }
.flip-card-month .flip-card-bottom { line-height: 0px; }

.flip-card-year {
    width: clamp(80px, 22vw, 110px);
    font-size: clamp(1.2rem, 4vw, 1.8rem);
}
.flip-card-year .flip-card-top { line-height: var(--date-h); }
.flip-card-year .flip-card-bottom { line-height: 0px; }

.flip-card-ampm {
    width: calc(var(--card-w) * 0.95);
    font-size: calc(var(--card-font) * 0.55);
}

/* ==========================================================================
   Tool 5: Alarm Clock Styles
   ========================================================================== */
.alarm-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 900px) {
    .alarm-layout {
        grid-template-columns: 380px 1fr;
    }
}

.alarm-item-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.15rem 1.4rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 0.85rem;
    transition: var(--transition);
}

.alarm-item-card.is-active {
    border-color: var(--accent);
}

.alarm-item-time {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.alarm-item-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-strong);
    border-radius: 34px;
    transition: .3s;
}
.switch-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #ffffff;
    border-radius: 50%;
    transition: .3s;
}
input:checked + .switch-slider {
    background-color: var(--success);
    border-color: var(--success);
}
input:checked + .switch-slider:before {
    transform: translateX(22px);
}

/* Ringing Alarm Modal */
.alarm-ringing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(10px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.alarm-ringing-overlay.active {
    display: flex;
    animation: alarmPulse 1.5s infinite alternate;
}

@keyframes alarmPulse {
    0% { background: rgba(0, 0, 0, 0.88); }
    100% { background: rgba(239, 68, 68, 0.35); }
}

.alarm-ringing-box {
    background: var(--bg-surface);
    border: 2px solid var(--danger);
    border-radius: var(--radius-lg);
    box-shadow: 0 0 50px var(--danger-glow);
    padding: 2.5rem;
    text-align: center;
    max-width: 450px;
    width: 100%;
}

/* ==========================================================================
   Tool 6: Timer Styles (Multi-Timer Countdown)
   ========================================================================== */
.timer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.timer-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.timer-card.is-running {
    border-color: var(--accent);
}

.timer-card.is-finished {
    border-color: var(--danger);
    animation: flashDanger 1s infinite alternate;
}

@keyframes flashDanger {
    from { box-shadow: 0 0 10px var(--danger-glow); }
    to { box-shadow: 0 0 25px var(--danger-glow); }
}

.timer-ring-wrapper {
    position: relative;
    width: 220px;
    height: 220px;
    margin: 1rem 0;
}

.timer-ring-svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.timer-ring-bg {
    fill: none;
    stroke: var(--bg-surface-elevated);
    stroke-width: 10;
}

.timer-ring-fg {
    fill: none;
    stroke: var(--accent);
    stroke-width: 10;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.25s linear;
}

.timer-center-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.timer-digits {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 700;
}

.timer-overtime {
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.2rem;
}

/* Quick Presets Bar */
.presets-chip-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.chip-btn {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    border-radius: var(--radius-full);
    background: var(--bg-surface-elevated);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.chip-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-hover);
    border-color: var(--border-strong);
}

/* ==========================================================================
   Tool 7: Pomodoro Timer Styles
   ========================================================================== */
.pomo-container {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
    width: 100%;
}

.pomo-nav-modes {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-surface);
    padding: 0.4rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-subtle);
    width: max-content;
    max-width: 100%;
    margin: 0 auto 1.5rem auto;
    box-sizing: border-box;
}

.pomo-mode-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
}

.pomo-mode-btn.active {
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
}

@media (max-width: 540px) {
    .pomo-nav-modes {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.25rem;
        padding: 0.3rem;
        border-radius: var(--radius-lg);
    }
    .pomo-mode-btn {
        padding: 0.5rem 0.2rem;
        font-size: 0.78rem;
        text-align: center;
        border-radius: var(--radius-md);
    }
}

.timer-ring-wrapper {
    position: relative;
    width: min(260px, 72vw);
    height: min(260px, 72vw);
    margin: 0 auto;
}

.pomo-time-display {
    font-family: var(--font-mono);
    font-size: clamp(2.4rem, 11vw, 3.4rem);
    font-weight: 700;
    line-height: 1.1;
}

.pomo-dots-row {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem 0;
}

.pomo-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-strong);
}

.pomo-dot.completed {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.pomo-actions-bar {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.pomo-btn-start {
    min-width: 140px;
}

@media (max-width: 480px) {
    .pomo-actions-bar {
        gap: 0.5rem;
    }
    .pomo-btn-start {
        flex: 1 1 100%;
        order: -1;
    }
}

.pomo-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
    margin-top: 1rem;
}

@media (max-width: 400px) {
    .pomo-stats-grid {
        gap: 0.25rem;
    }
    .pomo-stats-grid div:nth-child(even) {
        border-left: 1px solid var(--border-subtle);
        border-right: 1px solid var(--border-subtle);
    }
    .pomo-stats-grid div > div:first-child {
        font-size: 0.68rem !important;
    }
    .pomo-stats-grid div > div:last-child {
        font-size: 1.15rem !important;
    }
}

.noise-panel {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    text-align: left;
}

.noise-controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.noise-label-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.noise-actions-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

@media (max-width: 600px) {
    .noise-controls-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    .noise-actions-wrap {
        width: 100%;
        display: flex;
    }
    .noise-actions-wrap select {
        flex: 1;
        min-width: 0;
    }
}

/* ==========================================================================
   Tool 8: Egg Timer Styles
   ========================================================================== */
.egg-doneness-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 0.85rem;
    margin: 1.25rem 0;
}

.egg-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem 0.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.egg-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

.egg-card.selected {
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.08);
}

.egg-illustration {
    width: 54px;
    height: 70px;
    margin: 0 auto 0.5rem auto;
}

.egg-timer-simmer {
    animation: simmerShake 2s infinite ease-in-out;
}

@keyframes simmerShake {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* ==========================================================================
   Tool 9: Stopwatch Styles
   ========================================================================== */
.stopwatch-display-large {
    font-family: var(--font-mono);
    font-size: clamp(3rem, 11vw, 6.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    padding: 2.5rem 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
}

.lap-table-container {
    max-height: 380px;
    overflow-y: auto;
    margin-top: 1.5rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.lap-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

.lap-table th {
    background: var(--bg-surface-elevated);
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
    z-index: 5;
}

.lap-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
}

.lap-fastest {
    color: var(--success);
    font-weight: 600;
    background: var(--success-glow);
}

.lap-slowest {
    color: var(--danger);
    font-weight: 600;
    background: var(--danger-glow);
}

/* ==========================================================================
   Tool 10: Time Zone Converter Styles
   ========================================================================== */
.tz-timeline-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.tz-city-row {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tz-city-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tz-hours-grid {
    display: grid;
    grid-template-columns: repeat(24, 1fr);
    gap: 2px;
    height: 38px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-base);
}

.tz-hour-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.tz-hour-cell.is-selected {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    font-weight: 700;
}

.tz-hour-cell.is-now {
    border-bottom: 3px solid #f59e0b;
}

.tz-hour-work {
    background: rgba(16, 185, 129, 0.25);
    color: #34d399;
}

.tz-hour-social {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.tz-hour-sleep {
    background: rgba(30, 41, 59, 0.6);
    color: #e9ebed;
}

/* ==========================================================================
   Modal Dialogs
   ========================================================================== */
.chrono-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.chrono-modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 1.75rem;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-input, .form-select {
    width: 100%;
    padding: 0.6rem 0.85rem;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-input:focus, .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    padding: 1.25rem 1rem;
    margin-top: auto;
}

.footer-inner {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-lang-bar {
    max-width: 1300px;
    margin: 1rem auto 0 auto;
    padding-top: 0.85rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.footer-lang-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-lang-label .icon {
    color: var(--accent);
}

.footer-lang-chips {
    display: inline-flex;
    gap: 0.45rem;
    flex-wrap: wrap;
    align-items: center;
}

.lang-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: var(--transition);
}

.lang-chip:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background: var(--bg-surface-hover);
}

.lang-chip.active {
    color: #0f172a !important;
    background: var(--accent) !important;
    border-color: var(--accent) !important;
    font-weight: 600;
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* ==========================================================================
   Responsive Overrides
   ========================================================================== */
@media (max-width: 768px) {
    .tool-header-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-top {
        padding: 0.5rem 0.75rem;
    }
    
    /* Mobile Menu Toggle Button */
    .menu-toggle-btn {
        display: inline-flex !important;
    }

    /* Collapsed Navigation on Mobile: hidden by default until menu icon is tapped */
    .nav-scroll-container {
        display: none !important;
    }

    /* Expanded Navigation Drawer on Mobile */
    .nav-scroll-container.nav-open {
        display: block !important;
        position: absolute !important;
        top: 100% !important;
        left: 0 !important;
        right: 0 !important;
        background: var(--bg-surface) !important;
        border-bottom: 2px solid var(--border-strong) !important;
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45) !important;
        max-height: 80vh !important;
        overflow-y: auto !important;
        padding: 0.75rem 1rem !important;
        z-index: 1000 !important;
        animation: menuSlideDown 0.22s cubic-bezier(0.16, 1, 0.3, 1) !important;
    }

    @keyframes menuSlideDown {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .nav-scroll-container.nav-open .nav-tabs {
        flex-direction: column !important;
        align-items: stretch !important;
        min-width: 100% !important;
        gap: 0.35rem !important;
        padding: 0 !important;
    }

    .nav-scroll-container.nav-open .nav-link {
        width: 100% !important;
        padding: 0.7rem 1rem !important;
        font-size: 0.95rem !important;
        border-radius: var(--radius-md) !important;
        justify-content: flex-start !important;
    }

    .nav-scroll-container.nav-open .nav-link.active {
        border-bottom: none !important;
        border-left: 3px solid var(--accent) !important;
        background: var(--bg-surface-elevated) !important;
    }

    .nav-scroll-container.nav-open .nav-item-dropdown {
        width: 100% !important;
    }

    .nav-scroll-container.nav-open .nav-dropdown-btn {
        width: 100% !important;
        justify-content: space-between !important;
    }

    .nav-scroll-container.nav-open .nav-dropdown-menu {
        position: static !important;
        box-shadow: none !important;
        border: none !important;
        border-left: 2px solid var(--border-subtle) !important;
        margin: 0.25rem 0 0.5rem 1rem !important;
        padding: 0.25rem 0 0.25rem 0.5rem !important;
        background: transparent !important;
        display: none !important;
    }

    .nav-scroll-container.nav-open .nav-item-dropdown.is-open .nav-dropdown-menu {
        display: flex !important;
        flex-direction: column !important;
        gap: 0.25rem !important;
    }

    .nav-scroll-container.nav-open .dropdown-item {
        width: 100% !important;
        padding: 0.6rem 0.85rem !important;
        font-size: 0.9rem !important;
        border-radius: var(--radius-sm) !important;
    }
}

@media (max-width: 640px) {
    .main-content {
        padding: 1rem 0.5rem;
    }
    .chrono-card {
        padding: 1rem 0.65rem;
        border-radius: var(--radius-md);
    }
}


/* ==========================================================================
   Tool Fullscreen Mode Styles
   Only displays the primary functional component centered in full window
   ========================================================================== */
:fullscreen {
    background: var(--bg-base) !important;
    color: var(--text-primary) !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100vw !important;
    height: 100vh !important;
    margin: 0 !important;
    padding: 2rem !important;
    box-sizing: border-box !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    position: relative !important;
    overflow: auto !important;
}

.btn-exit-fullscreen,
:fullscreen .btn-exit-fullscreen {
    display: none !important;
}

/* Tool 1: Analog Clock Fullscreen */
#analog-clock-stage:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    margin: 0 !important;
    padding: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

#analog-clock-stage:fullscreen #analog-svg {
    width: min(85vmin, 800px) !important;
    height: min(85vmin, 800px) !important;
}

/* Tool 2: Digital Clock Fullscreen */
#digital-main-stage:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    justify-content: center !important;
    padding: 2rem !important;
    background: #090d16 !important;
}

#digital-main-stage[data-dig-color="black"]:fullscreen {
    background: #e2e8f0 !important;
}

#digital-main-stage:fullscreen .digital-time-main {
    font-size: clamp(4rem, 16vw, 13rem) !important;
}

/* Tool 3: World Clock Fullscreen */
#world-clock-stage:fullscreen {
    display: block !important;
    width: 100vw !important;
    height: 100vh !important;
    background: var(--bg-base) !important;
    padding: 4rem 2rem 2rem 2rem !important;
    box-sizing: border-box !important;
    overflow-y: auto !important;
}

#world-clock-stage:fullscreen #world-cities-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)) !important;
    gap: 1.5rem !important;
    width: 100% !important;
    max-width: 1300px !important;
    margin: 0 auto !important;
}

#world-clock-stage:fullscreen .city-card {
    background: var(--bg-surface) !important;
    border: 1px solid var(--border-strong) !important;
    border-radius: var(--radius-lg) !important;
    padding: 1.35rem 1.5rem !important;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4) !important;
}

#world-clock-stage:fullscreen .city-card-time {
    font-size: 2.5rem !important;
}

/* Tool 4: Flip Clock Fullscreen */
#flip-clock-stage:fullscreen {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100vw !important;
    height: 100vh !important;
    background: var(--bg-base) !important;
    padding: 2rem !important;
    box-sizing: border-box !important;
    gap: 2rem !important;
    overflow: hidden !important;
}

#flip-clock-stage:fullscreen .flip-clock-board {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 1rem !important;
    padding: 0 !important;
    flex-wrap: nowrap !important;
}

#flip-clock-stage:fullscreen .flip-card {
    width: clamp(80px, 11vw, 130px) !important;
    height: clamp(120px, 16vw, 180px) !important;
    font-size: clamp(4.5rem, 10vw, 8rem) !important;
}

#flip-clock-stage:fullscreen .flip-card-top {
    line-height: clamp(120px, 16vw, 180px) !important;
}

#flip-clock-stage:fullscreen .flip-card-bottom {
    line-height: 0px !important;
}

#flip-clock-stage:fullscreen .flip-colon {
    font-size: clamp(3.5rem, 7vw, 6rem) !important;
    margin: 0 0.35rem !important;
}

#flip-clock-stage:fullscreen .flip-card-ampm {
    width: clamp(60px, 8vw, 80px) !important;
    font-size: clamp(1.8rem, 3vw, 2.8rem) !important;
}

#flip-clock-stage:fullscreen .flip-date-row {
    display: flex;
    justify-content: center !important;
    gap: 1.25rem !important;
    margin-top: 0 !important;
}

.flip-date-row.is-hidden,
#flip-clock-stage:fullscreen .flip-date-row.is-hidden {
    display: none !important;
}

#flip-clock-stage:fullscreen .flip-card-date {
    width: 95px !important;
    height: 65px !important;
    font-size: 2.2rem !important;
}

#flip-clock-stage:fullscreen .flip-card-date .flip-card-top {
    line-height: 65px !important;
}

#flip-clock-stage:fullscreen .flip-card-month {
    width: 120px !important;
    height: 65px !important;
    font-size: 1.8rem !important;
}

#flip-clock-stage:fullscreen .flip-card-month .flip-card-top {
    line-height: 65px !important;
}

#flip-clock-stage:fullscreen .flip-card-year {
    width: 130px !important;
    height: 65px !important;
    font-size: 2rem !important;
}

#flip-clock-stage:fullscreen .flip-card-year .flip-card-top {
    line-height: 65px !important;
}

/* Tool 6: Timer Fullscreen */
#timer-stage:fullscreen {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100vw !important;
    height: 100vh !important;
    background: var(--bg-base) !important;
    padding: 3.5rem 2rem 2rem 2rem !important;
    box-sizing: border-box !important;
    overflow-y: auto !important;
}

#timer-stage:fullscreen #timers-grid {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 2rem !important;
    width: 100% !important;
    max-width: 1200px !important;
    margin: 0 auto !important;
}

#timer-stage:fullscreen .timer-card {
    background: var(--bg-surface) !important;
    border: 1px solid var(--border-strong) !important;
    border-radius: var(--radius-lg) !important;
    padding: 2rem !important;
    width: 360px !important;
    max-width: 90vw !important;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4) !important;
}

#timer-stage:fullscreen .timer-ring-wrapper {
    width: 240px !important;
    height: 240px !important;
}

#timer-stage:fullscreen .timer-digits {
    font-size: 2.8rem !important;
}

/* Other Tools Fullscreen */
#pomo-main-stage:fullscreen,
#egg-main-stage:fullscreen,
#stopwatch-main-stage:fullscreen,
#alarm-main-stage:fullscreen,
#tz-timelines-container:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    justify-content: center !important;
    padding: 2rem !important;
}

/* ==========================================================================
   Tool Article & Editorial Content Sections (Clean Typography, No Heavy Boxes)
   ========================================================================== */
.tool-article {
    margin-top: 2rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 2.5rem 2.25rem;
    color: var(--text-primary);
    line-height: 1.8;
    text-align: left;
}

.tool-article h2 {
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.015em;
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.tool-article h2 .icon {
    color: var(--accent);
}

.tool-article h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 1.75rem 0 0.65rem 0;
    letter-spacing: -0.01em;
}

.tool-article p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.15rem;
    line-height: 1.8;
}

.tool-article blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.6rem 0 0.6rem 1.25rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.tool-article blockquote p {
    margin-bottom: 0;
    color: var(--text-primary);
}

.tool-article ul, .tool-article ol {
    margin: 0.75rem 0 1.25rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.tool-article li {
    margin-bottom: 0.5rem;
}

.tool-article strong {
    color: var(--text-primary);
}

.tool-article .faq-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 2rem 0 0.85rem 0;
    color: var(--text-primary);
}

.tool-article .faq-item {
    margin-bottom: 1.15rem;
}

.tool-article .faq-q {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tool-article .faq-a {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}