/* =============================================================
   URLS Design System – HSL Token-Based CSS
   DesignAnforderungen.md Kat.0–4 compliant
   Phase 5: :focus-visible System, Keyboard-Drag, Backup-List
   Phase 5+: iOS-Toggle, Cat-Border, Scroll-Progress, Toast-Bar,
             Stagger-Reveal, Parallax-Blobs, ARIA-Drag-Live
   Phase 6: Gradient-Subtitle, Vibrant Dopamine Hero,
             Parallax-Sections (Kat.2)
   Phase 7: [hidden] Reset-Fix, Monogram-Avatar (Canvas, no ext. requests)
   Phase 8: fix ui:* events + standalone-section styles
   Phase 9: persistent icon visibility (opacity 0.35 at rest → 1 on hover)
   Phase 10: hide native scrollbar, modal glass bg + shadow fix
   Phase 11: gradient modal-title,
             accent top-border on modal-header
   Phase 12: fix border-image → ::before gradient top-border (border-radius
             compatible), fix #4 hidden-filter drag, fix #5 cross-category drag
   Phase 13: Prioritäts-Matrix Polish – deepened glassmorphism, gradient CTAs,
             shimmer-border cards, spring-scale modal,
             mouse-reactive blobs, hero grain texture, toast glass
   ============================================================= */

/* ---- 1. DESIGN TOKENS ---------------------------------------- */
:root {
    /* Primary Palette – Cyan Brand */
    --color-primary: hsl(189, 94%, 43%);
    --color-primary-hover: hsl(189, 94%, 36%);
    --color-primary-subtle: hsl(189, 94%, 43%, 0.12);
    --color-primary-glow: hsl(189, 94%, 43%, 0.25);

    /* Secondary Accent – Violet (Dopamine/Vibrant, Kat.2) */
    --color-accent: hsl(270, 80%, 65%);
    --color-accent-subtle: hsl(270, 80%, 65%, 0.12);
    --color-accent-glow: hsl(270, 80%, 65%, 0.22);

    /* Semantic Colors */
    --color-success: hsl(142, 71%, 45%);
    --color-warning: hsl(38, 92%, 50%);
    --color-error: hsl(0, 84%, 60%);
    --color-info: hsl(217, 91%, 60%);

    /* Neutral Scale */
    --color-bg: hsl(222, 20%, 8%);
    --color-bg-elevated: hsl(222, 18%, 11%);
    --color-bg-card: hsl(222, 16%, 14%);
    --color-surface: hsl(222, 14%, 18%);
    --color-border: hsl(222, 14%, 24%);
    --color-border-focus: hsl(189, 94%, 43%, 0.6);
    --color-text: hsl(220, 20%, 94%);
    --color-text-muted: hsl(220, 12%, 60%);
    --color-text-subtle: hsl(220, 10%, 42%);

    /* Category Color Palette */
    --cat-1: hsl(189, 94%, 43%);
    --cat-2: hsl(270, 80%, 65%);
    --cat-3: hsl(38, 92%, 50%);
    --cat-4: hsl(142, 71%, 45%);
    --cat-5: hsl(350, 80%, 60%);
    --cat-6: hsl(30, 90%, 55%);

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;

    /* 8pt Grid */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px hsl(0, 0%, 0%, 0.3);
    --shadow-md: 0 4px 16px hsl(0, 0%, 0%, 0.4);
    --shadow-lg: 0 8px 32px hsl(0, 0%, 0%, 0.5);
    --shadow-glow: 0 0 24px var(--color-primary-glow);
    --shadow-glow-accent: 0 0 32px var(--color-accent-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Glassmorphism – deepened (Phase 13) */
    --glass-bg: hsl(222, 16%, 14%, 0.65);
    --glass-border: hsl(222, 14%, 28%, 0.5);
    --glass-blur: blur(20px);
    --glass-inner-glow: inset 0 1px 0 0 hsl(220, 20%, 100%, 0.06);

    /* Z-Index */
    --z-header: 100;
    --z-dropdown: 200;
    --z-modal: 300;
    --z-toast: 400;

}

/* Light Mode */
[data-theme="light"] {
    --color-bg: hsl(220, 20%, 98%);
    --color-bg-elevated: hsl(220, 18%, 94%);
    --color-bg-card: hsl(220, 16%, 90%);
    --color-surface: hsl(220, 14%, 84%);
    --color-border: hsl(220, 14%, 76%);
    --color-text: hsl(220, 20%, 12%);
    --color-text-muted: hsl(220, 12%, 40%);
    --color-text-subtle: hsl(220, 10%, 58%);
    --glass-bg: hsl(220, 18%, 96%, 0.72);
    --glass-border: hsl(220, 14%, 80%, 0.6);
    --glass-inner-glow: inset 0 1px 0 0 hsl(0, 0%, 100%, 0.5);
    --shadow-sm: 0 1px 3px hsl(0, 0%, 0%, 0.08);
    --shadow-md: 0 4px 16px hsl(0, 0%, 0%, 0.12);
    --shadow-lg: 0 8px 32px hsl(0, 0%, 0%, 0.18);
}

/* ---- 2. RESET & BASE ----------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/*
 * Fix: Browser-natives [hidden]-Attribut wird durch explizite
 * display-Werte in Komponenten-Klassen (z.B. display:flex)
 * überschrieben. Diese Regel stellt sicher, dass [hidden] immer
 * Vorrang hat – unabhängig von der Komponentenspezifität.
 * Betrifft: .skeleton-list, .undo-banner, .empty-state, etc.
 */
[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    /* Native Scrollbar ausblenden – custom .scroll-progress in der Navbar übernimmt */
    scrollbar-width: none;
    /* Firefox */
}

html::-webkit-scrollbar {
    display: none;
}

/* Chrome / Safari / Edge */

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100dvh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

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

img,
svg {
    display: block;
    max-width: 100%;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.container {
    width: 100%;
    max-width: 960px;
    margin-inline: auto;
    padding-inline: var(--space-6);
}

/* ---- 3. FOCUS-VISIBLE SYSTEM --------------------------------- */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) {
    outline: none;
}

/* ---- 4. GLASSMORPHISM ---------------------------------------- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg), var(--glass-inner-glow);
}



/* ---- 6. HEADER ----------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background var(--transition-normal), border-color var(--transition-normal), backdrop-filter var(--transition-normal);
}

.site-header.is-scrolled {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-color: var(--glass-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

/* ---- 6b. SCROLL PROGRESS BAR --------------------------------- */
.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 100ms linear;
    border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
}

/* ---- 7. SAVE STATUS DOT -------------------------------------- */
.save-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    transition: background var(--transition-fast);
}

.status-dot.is-pending {
    background: var(--color-warning);
    animation: pulse 1.2s infinite;
}

.status-dot.is-error {
    background: var(--color-error);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.35;
    }
}

/* ---- 8. BUTTONS ---------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-pill);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    background-size: 200% 200%;
    background-position: 0% 50%;
    color: hsl(222, 20%, 8%);
    transition: background-position var(--transition-normal), box-shadow var(--transition-fast), transform var(--transition-fast), filter var(--transition-fast);
}

.btn-primary:hover {
    background-position: 100% 50%;
    box-shadow: 0 0 20px var(--color-primary-glow), 0 0 40px var(--color-accent-glow);
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    color: var(--color-text);
    border-color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.btn-danger {
    background: var(--color-error);
    color: #fff;
}

.btn-danger:hover {
    background: hsl(0, 84%, 50%);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8rem;
}

.link-btn {
    background: none;
    border: none;
    color: var(--color-primary);
    text-decoration: underline;
    cursor: pointer;
    padding: 0;
    font: inherit;
}

/* ---- 9. THEME TOGGLE – iOS-Style Switch ---------------------- */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.theme-toggle-track {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover .theme-toggle-track {
    border-color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.theme-toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast);
    pointer-events: none;
    color: hsl(222, 20%, 8%);
}

[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(20px);
}

[data-theme="dark"] .theme-toggle-thumb .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle-thumb .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle-thumb .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle-thumb .icon-sun {
    display: block;
}

/* ---- 10. DROPDOWN -------------------------------------------- */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 180px;
    list-style: none;
    border-radius: var(--radius-md);
    padding: var(--space-2) 0;
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.dropdown-menu.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.dropdown-item {
    display: block;
    width: 100%;
    text-align: left;
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    color: var(--color-text);
    background: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
}

[role="separator"] {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-2) 0;
}

/* ---- 11. HERO ------------------------------------------------- */
.hero {
    position: relative;
    padding: var(--space-20) 0 var(--space-16);
    overflow: hidden;
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.22;
    will-change: transform;
}

.blob-1 {
    width: 560px;
    height: 560px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: -160px;
    left: -120px;
}

.blob-2 {
    width: 440px;
    height: 440px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    bottom: -110px;
    right: -90px;
}

/* Kat.2 Vibrant: dritter Blob für Dopamine-Tiefe */
.blob-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, hsl(350, 80%, 60%) 0%, transparent 70%);
    top: 40%;
    left: 55%;
    opacity: 0.10;
    filter: blur(100px);
    will-change: transform;
}

.dot-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(hsl(220, 14%, 60%, 0.08) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* Phase 13 – Grain/Noise Texture Overlay (Kat.2 Background Patterns) */
.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 128px 128px;
    opacity: 0.03;
    pointer-events: none;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 3.8rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shineGradient 4s linear infinite;
}

@keyframes shineGradient {
    to {
        background-position: 200% center;
    }
}

/* Kat.2 Gradient-Subtitle – Cyan→Violet mit reduzierter Opacity für Lesbarkeit */
.hero-subtitle {
    font-size: 1.1rem;
    max-width: 520px;
    margin-inline: auto;
    margin-bottom: var(--space-10);
    background: linear-gradient(135deg,
            var(--color-text-muted) 0%,
            hsl(220, 30%, 78%) 50%,
            var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    /* Fallback für Browser ohne background-clip:text */
    color: var(--color-text-muted);
}

/* Light Mode: Subtitle als plain Text – Gradient-Clip schlecht lesbar auf hellem BG */
[data-theme="light"] .hero-subtitle {
    background: none;
    -webkit-text-fill-color: unset;
    color: var(--color-text-muted);
}

/* ---- 12. BENTO GRID ------------------------------------------ */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    max-width: 600px;
    margin-inline: auto;
}

@media (max-width: 500px) {
    .bento-grid {
        grid-template-columns: 1fr 1fr;
    }

    .bento-grid .bento-card:last-child {
        grid-column: span 2;
    }
}

.bento-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

/* Phase 13: Shimmer-overlay on hover */
.bento-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, hsl(189, 94%, 43%, 0.08) 50%, transparent 60%);
    background-size: 300% 300%;
    background-position: 100% 100%;
    transition: background-position 0.6s ease;
    pointer-events: none;
    border-radius: inherit;
}

.bento-card:hover::after {
    background-position: 0% 0%;
}

.bento-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow), var(--glass-inner-glow);
    border-color: var(--color-primary);
}

/* Kat.2 Vibrant: zweiter und dritter Bento-Card mit Akzent-Glow beim Hover */
.bento-card:nth-child(2)::after {
    background: linear-gradient(135deg, transparent 40%, hsl(270, 80%, 65%, 0.08) 50%, transparent 60%);
    background-size: 300% 300%;
    background-position: 100% 100%;
}

.bento-card:nth-child(2):hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow-accent), var(--glass-inner-glow);
    transform: translateY(-5px);
}

.bento-card:nth-child(3)::after {
    background: linear-gradient(135deg, transparent 40%, hsl(142, 71%, 45%, 0.08) 50%, transparent 60%);
    background-size: 300% 300%;
    background-position: 100% 100%;
}

.bento-card:nth-child(3):hover {
    border-color: var(--color-success);
    box-shadow: 0 0 24px hsl(142, 71%, 45%, 0.25), var(--glass-inner-glow);
    transform: translateY(-5px);
}

.bento-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.bento-value--text {
    font-size: 1.1rem;
}

/* Zweiter Bento-Value in Akzentfarbe für Farbabwechslung */
.bento-card:nth-child(2) .bento-value {
    color: var(--color-accent);
}

.bento-label {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    text-align: center;
}

/* ---- 13. MAIN / SEARCH --------------------------------------- */
.main-content {
    padding-block: var(--space-8);
}

.search-bar {
    position: relative;
    margin-bottom: var(--space-6);
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-subtle);
    pointer-events: none;
}

.search-input {
    width: 100%;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: var(--space-3) var(--space-5) var(--space-3) calc(var(--space-5) + 24px);
    color: var(--color-text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

.search-input::placeholder {
    color: var(--color-text-subtle);
}

.search-clear {
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-subtle);
    font-size: 0.85rem;
    padding: var(--space-1);
}

/* ---- 14. UNDO BANNER ----------------------------------------- */
.undo-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-4);
    font-size: 0.9rem;
    animation: slideDown var(--transition-normal);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- 15. SKELETON -------------------------------------------- */
.skeleton-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.skeleton {
    background: linear-gradient(90deg,
            var(--color-bg-card) 25%,
            var(--color-surface) 50%,
            var(--color-bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: var(--radius-md);
}

.skeleton-card {
    height: 72px;
}

@keyframes shimmer {
    from {
        background-position: 200% 0;
    }

    to {
        background-position: -200% 0;
    }
}

/* ---- 16. CATEGORIES & LINK CARDS ----------------------------- */
.category-section {
    margin-bottom: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    will-change: transform;
}

.category-section:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px var(--color-primary-subtle);
}

/* Kat.2 Parallax: Sections reagieren subtil auf Scroll via JS --parallax-y */
.category-section[data-parallax] {
    transform: translateY(var(--parallax-y, 0px));
}

/* ---- 16b. STANDALONE SECTION --------------------------------- */
.standalone-section {
    margin-bottom: var(--space-4);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.standalone-section:hover {
    border-color: var(--color-primary);
}

.standalone-section .link-card:first-child {
    border-top: none;
}

.standalone-section .link-card:last-child {
    border-bottom: none;
}

/* ---- 17. CATEGORY HEADER ------------------------------------- */
.category-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-elevated);
    cursor: pointer;
    user-select: none;
    border-left: 3px solid transparent;
    transition: background var(--transition-fast), border-left-color var(--transition-fast), box-shadow var(--transition-fast);
}

.category-header:hover {
    background: var(--color-surface);
    box-shadow: inset 0 0 30px hsl(189, 94%, 43%, 0.04), 0 2px 8px hsl(0, 0%, 0%, 0.15);
}

.category-color-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.category-name {
    flex: 1;
    font-weight: 600;
    font-size: 0.95rem;
}

.category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1px var(--space-2);
    border-radius: var(--radius-pill);
    background: var(--color-surface);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    min-width: 22px;
}

.category-toggle {
    color: var(--color-text-subtle);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.category-toggle.is-collapsed {
    transform: rotate(-90deg);
}

.category-body {
    overflow: hidden;
    max-height: 9999px;
    transition: max-height var(--transition-slow);
}

.category-body.is-collapsed {
    max-height: 0;
}

.category-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    opacity: 0.35;
    transition: opacity var(--transition-fast);
}

.category-header:hover .category-actions,
.category-header:focus-within .category-actions {
    opacity: 1;
}

/* Link Card */
.link-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
    cursor: grab;
    position: relative;
}

.link-card:last-child {
    border-bottom: none;
}

.link-card:hover {
    background: var(--color-surface);
    transform: translateX(4px);
    box-shadow: -4px 0 0 var(--color-primary), inset 0 0 20px hsl(189, 94%, 43%, 0.03);
}

.link-card.is-dragging {
    opacity: 0.5;
    cursor: grabbing;
    transform: scale(0.98);
}

.link-card.drag-over {
    border-top: 2px solid var(--color-primary);
}

.link-card.is-kb-dragging {
    background: var(--color-primary-subtle);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
}

.drag-handle {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-subtle);
    cursor: grab;
    flex-shrink: 0;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.drag-handle:hover {
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.drag-handle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.link-favicon {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    display: block;
}

.link-info {
    flex: 1;
    min-width: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-url {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

.link-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    opacity: 0.35;
    transition: opacity var(--transition-fast);
    flex-shrink: 0;
}

.link-card:hover .link-actions,
.link-card:focus-within .link-actions {
    opacity: 1;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    color: var(--color-text-subtle);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.icon-btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.icon-btn.danger:hover {
    color: var(--color-error);
    background: hsl(0, 84%, 60%, 0.12);
}

.uncategorized-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ---- 18. EMPTY STATE ----------------------------------------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-16) var(--space-8);
    text-align: center;
    color: var(--color-text-muted);
}

/* ---- 19. MODALS ---------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    margin: auto;
    width: min(480px, calc(100vw - var(--space-8)));
    max-height: calc(100dvh - var(--space-8));
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-lg), 0 0 40px hsl(0, 0%, 0%, 0.35), var(--glass-inner-glow);
    padding: 0;
    overflow: auto;
    z-index: var(--z-modal);
    animation: modalIn 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal::backdrop {
    background: hsl(0, 0%, 0%, 0.6);
    backdrop-filter: blur(6px);
    animation: backdropIn 250ms ease forwards;
}

@keyframes backdropIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(12px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/*
 * Phase 12 – Modal-Header Gradient-Top-Border Fix:
 * border-image deaktiviert border-radius an den Ecken des <dialog>.
 * Fix: border-top entfernt, stattdessen ::before-Pseudo-Element mit
 * einem 2px hohen Gradient-Streifen, der border-radius der oberen
 * Ecken des Modals via overflow:hidden am .modal erbt.
 * Das ::before liegt im normalen Fluss (position:absolute, inset-inline:0,
 * top:0) und respektiert den border-radius des Eltern-Elements.
 */
.modal-header {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    /* Kein border-top / border-image mehr – wird durch ::before ersetzt */
}

.modal-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    /* border-radius wird via overflow:hidden des .modal geclipt –
       kein manuelles border-radius nötig */
    pointer-events: none;
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    /* Gradient-Text Cyan→Violet analog zu .gradient-text im Hero */
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shineGradient 4s linear infinite;
    /* Fallback für Browser ohne background-clip:text */
    color: var(--color-primary);
}

/* Light Mode: Gradient-Clip auf hellem BG gut lesbar, Kontrast prüfen */
[data-theme="light"] .modal-title {
    background: linear-gradient(135deg, var(--color-primary-hover) 0%, hsl(270, 80%, 50%) 50%, var(--color-primary-hover) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--color-primary-hover);
    animation: shineGradient 4s linear infinite;
}

.modal-close {
    color: var(--color-text-subtle);
    font-size: 1.1rem;
    line-height: 1;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.modal-body {
    padding: var(--space-5) var(--space-6);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

/* ---- 20. FORMS ----------------------------------------------- */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.form-group:last-of-type {
    margin-bottom: 0;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-input {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--color-text);
    width: 100%;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.form-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-subtle), 0 0 16px var(--color-primary-glow);
    transform: scale(1.002);
}

.form-input.is-invalid {
    border-color: var(--color-error);
}

.form-select {
    appearance: none;
    /* Fix #8: Custom Dropdown-Pfeil da appearance:none den nativen entfernt */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-checkbox {
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
}

.form-checkbox-input {
    appearance: none;
    -webkit-appearance: none;
    position: relative;
    width: 36px;
    height: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.form-checkbox-input::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-text-subtle);
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.form-checkbox-input:checked {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-checkbox-input:checked::after {
    transform: translateX(16px);
    background: hsl(222, 20%, 8%);
}

/* Fix #10: Light-Mode – Toggle-Punkt auf hellem Theme sichtbar */
[data-theme="light"] .form-checkbox-input:checked::after {
    background: hsl(0, 0%, 100%);
}

.form-error {
    font-size: 0.8rem;
    color: var(--color-error);
    min-height: 1.2em;
}

/* ---- 21. FILE DROP ZONE -------------------------------------- */
.file-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-10) var(--space-6);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
    border-color: var(--color-primary);
    background: var(--color-primary-subtle);
}

/* ---- 22. TOAST ----------------------------------------------- */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: var(--z-toast);
    pointer-events: none;
    align-items: flex-end;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    box-shadow: var(--shadow-md), var(--glass-inner-glow);
    pointer-events: auto;
    max-width: 340px;
    animation: toastIn 300ms cubic-bezier(0.34, 1.3, 0.64, 1);
    border-left: 4px solid var(--color-info);
    overflow: hidden;
    position: relative;
}

.toast.is-success {
    border-left-color: var(--color-success);
}

.toast.is-error {
    border-left-color: var(--color-error);
}

.toast.is-warning {
    border-left-color: var(--color-warning);
}

.toast.is-info {
    border-left-color: var(--color-info);
}

.toast.is-leaving {
    animation: toastOut var(--transition-normal) forwards;
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 100%;
    background: currentColor;
    opacity: 0.3;
    transform-origin: left center;
    animation: toastProgress var(--toast-duration, 3500ms) linear forwards;
}

@keyframes toastProgress {
    from {
        transform: scaleX(1);
    }

    to {
        transform: scaleX(0);
    }
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(24px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(16px);
    }
}

/* ---- 23. SCROLL REVEAL + STAGGER ----------------------------- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity var(--transition-slow) ease calc(var(--reveal-index, 0) * 60ms),
        transform var(--transition-slow) ease calc(var(--reveal-index, 0) * 60ms);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- 24. BACKUP LIST ----------------------------------------- */
.backup-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-4);
    max-height: 300px;
    overflow-y: auto;
}

.backup-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
}

.backup-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.backup-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.backup-loading,
.backup-empty,
.backup-error {
    color: var(--color-text-muted);
    justify-content: center;
}

.backup-error {
    color: var(--color-error);
}

/* ---- 25. REDUCED MOTION -------------------------------------- */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    html {
        scroll-behavior: auto;
    }

    .skeleton {
        animation: none;
        background: var(--color-bg-card);
    }

    .scroll-progress {
        transition: none;
    }

    .blob {
        will-change: auto;
    }

    .category-section[data-parallax] {
        transform: none !important;
    }
}

/* ---- 26. RESPONSIVE ------------------------------------------ */
@media (max-width: 640px) {
    .header-inner {
        height: auto;
        padding-block: var(--space-3);
        flex-wrap: wrap;
    }

    .hero {
        padding: var(--space-12) 0 var(--space-10);
    }

    .bento-grid {
        gap: var(--space-3);
    }

    .link-title {
        font-size: 0.85rem;
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        align-items: stretch;
    }

    .toast {
        max-width: 100%;
    }
}