body.dark-mode {
    background: linear-gradient(135deg, #2a1f0a 0%, #3d2e15 50%, #4a3820 100%);
}

body.dark-mode h1 {
    color: var(--sky-blue);
    text-shadow: 2px 2px 8px rgba(168, 213, 226, 0.3);
}

body.dark-mode .subtitle      { color: var(--sand); }

body.dark-mode .countdown-wrapper {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(168, 213, 226, 0.15);
}

body.dark-mode .countdown-label   { color: var(--sand); }
body.dark-mode .countdown-birthday { color: var(--sky-blue); }

body.dark-mode .section-title    { color: var(--sky-blue); }
body.dark-mode .section-subtitle { color: var(--sand); }

body.dark-mode .side-drawer {
    background: #1a1a2e;
    border-right-color: rgba(168, 213, 226, 0.12);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.4);
}

body.dark-mode .drawer-name { color: var(--sky-blue); }

body.dark-mode .bottom-nav {
    background: #1a1a2e;
    border-top-color: rgba(168, 213, 226, 0.15);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
}

body.dark-mode .nav-btn.active {
    background: rgba(168, 213, 226, 0.1);
}

@media (min-width: 769px) {
    body.dark-mode .nav-btn.active {
        box-shadow: inset 3px 0 0 var(--sky-blue);
    }
    body.dark-mode .nav-btn.active .nav-label { color: var(--sky-blue); }
}

@media (max-width: 768px) {
    body.dark-mode .nav-btn.active::after {
        background: linear-gradient(90deg, var(--soft-blue), var(--sky-blue));
    }
    body.dark-mode .nav-btn.active .nav-label { color: var(--sky-blue); }
}

body.dark-mode .sticky-header {
    background: rgba(22, 33, 62, 0.9);
    border-bottom: 1px solid rgba(168, 213, 226, 0.2);
}

body.dark-mode .sticky-title { color: var(--sky-blue); }

body.dark-mode .theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--sky-blue);
    color: var(--sky-blue);
}

body.dark-mode .card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(168, 213, 226, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body.dark-mode .card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--sky-blue);
    box-shadow: 0 12px 40px rgba(168, 213, 226, 0.2);
}

body.dark-mode .card-title       { color: var(--sky-blue); }
body.dark-mode .card-message     { color: #e0e0e0; }
body.dark-mode .card-date        { color: var(--sand); }
body.dark-mode .card-date::before {
    color: var(--sky-blue);
    background: transparent;
}
body.dark-mode .card-toggle-icon { color: var(--sky-blue); }

body.dark-mode .pinned-card .card {
    border-color: rgba(168, 213, 226, 0.2);
}

body.dark-mode .pinned-badge {
    color: var(--sky-blue);
    background: rgba(168, 213, 226, 0.08);
    border-color: rgba(168, 213, 226, 0.2);
}

body.dark-mode .chapter-title       { color: var(--sky-blue); }
body.dark-mode .chapter-description { color: var(--sand); }

body.dark-mode .card-download {
    border-top-color: rgba(168, 213, 226, 0.3);
}

body.dark-mode .download-link {
    background: linear-gradient(135deg, var(--soft-blue), var(--sky-blue));
    box-shadow: 0 4px 12px rgba(90, 155, 212, 0.4);
}

body.dark-mode .download-link:hover {
    background: linear-gradient(135deg, var(--sky-blue), var(--accent-gold));
    box-shadow: 0 6px 20px rgba(168, 213, 226, 0.5);
}

body.dark-mode .anniversary-wrapper {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(245, 217, 122, 0.25);
}

body.dark-mode .anniversary-label  { color: var(--sand); }
body.dark-mode .anniversary-number {
    color: var(--sky-blue);
    text-shadow: 1px 1px 8px rgba(245, 217, 122, 0.25);
}
body.dark-mode .anniversary-unit   { color: var(--sand); }

body.dark-mode .drawer-collapse-btn {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(168, 213, 226, 0.25);
    color: var(--sky-blue);
}

body.dark-mode .drawer-collapse-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: var(--sky-blue);
}