/* ======================================================
   PhotoResizer.com — Global Design System
   ====================================================== */

/* ===== Design Tokens ===== */
:root {
    --bg-base: #06060b;
    --bg-surface: rgba(14, 14, 22, 0.75);
    --bg-surface-hover: rgba(22, 22, 36, 0.85);
    --bg-glass: rgba(16, 16, 30, 0.55);
    --bg-glass-border: rgba(120, 100, 255, 0.1);
    --bg-card: rgba(14, 14, 26, 0.6);
    --bg-card-hover: rgba(22, 22, 40, 0.7);

    --text-primary: #f0eef6;
    --text-secondary: #9892a6;
    --text-tertiary: #6b6580;

    --accent: #a78bfa;
    --accent-hover: #c4b5fd;
    --accent-dim: #7c5cbf;
    --accent-glow: rgba(167, 139, 250, 0.25);
    --accent-gradient: linear-gradient(135deg, #a78bfa, #6366f1);
    --accent-gradient-hover: linear-gradient(135deg, #c4b5fd, #818cf8);

    --purple: #a78bfa;
    --blue: #60a5fa;
    --cyan: #22d3ee;
    --green: #34d399;
    --emerald: #10b981;
    --orange: #fb923c;
    --pink: #f472b6;
    --red: #f87171;
    --yellow: #fbbf24;

    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --info: #60a5fa;

    --border: rgba(255, 255, 255, 0.06);
    --border-active: rgba(167, 139, 250, 0.35);

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px var(--accent-glow);

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;
}

/* ===== Light Theme ===== */
[data-theme="light"] {
    --bg-base: #f4f4f8;
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-surface-hover: rgba(240, 240, 248, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.65);
    --bg-glass-border: rgba(120, 100, 255, 0.12);
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-card-hover: rgba(245, 245, 252, 0.85);

    --text-primary: #1a1a2e;
    --text-secondary: #555568;
    --text-tertiary: #8888a0;

    --accent: #7c3aed;
    --accent-hover: #6d28d9;
    --accent-dim: #8b5cf6;
    --accent-glow: rgba(124, 58, 237, 0.15);
    --accent-gradient: linear-gradient(135deg, #8b5cf6, #6366f1);
    --accent-gradient-hover: linear-gradient(135deg, #a78bfa, #818cf8);

    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #2563eb;

    --border: rgba(0, 0, 0, 0.08);
    --border-active: rgba(124, 58, 237, 0.3);

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 40px var(--accent-glow);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

/* ===== Theme Toggle ===== */
.theme-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 38px; height: 38px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast);
    flex-shrink: 0;
    margin-left: 8px;
}

.theme-toggle:hover {
    color: var(--accent);
    background: rgba(167,139,250,0.08);
    border-color: var(--border-active);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon { transition: transform 0.3s var(--ease-spring); }

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

/* ===== Animated Background ===== */
.bg-grid {
    position: fixed; inset: 0;
    background-image:
        linear-gradient(rgba(167, 139, 250, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(167, 139, 250, 0.025) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0; pointer-events: none;
}

.bg-glow {
    position: fixed; border-radius: 50%;
    filter: blur(130px); opacity: 0.35;
    z-index: 0; pointer-events: none;
    animation: glow-drift 22s ease-in-out infinite alternate;
}
.bg-glow--1 { width: 550px; height: 550px; background: radial-gradient(circle, rgba(99,102,241,0.3), transparent 70%); top: -120px; left: -120px; }
.bg-glow--2 { width: 420px; height: 420px; background: radial-gradient(circle, rgba(167,139,250,0.2), transparent 70%); bottom: -60px; right: -100px; animation-delay: -8s; }
.bg-glow--3 { width: 320px; height: 320px; background: radial-gradient(circle, rgba(139,92,246,0.15), transparent 70%); top: 40%; left: 55%; animation-delay: -15s; }

@keyframes glow-drift {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(35px, -25px) scale(1.08); }
    100% { transform: translate(-25px, 35px) scale(0.94); }
}

/* ===== Navigation ===== */
.nav {
    position: sticky; top: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px var(--space-xl);
    background: rgba(6, 6, 11, 0.8);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav__brand {
    display: flex; align-items: center; gap: var(--space-sm);
    font-size: 1.2rem; font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; letter-spacing: -0.3px;
}

.nav__brand svg { flex-shrink: 0; }

.nav__links {
    display: flex; align-items: center; gap: 4px;
    list-style: none;
}

.nav__link {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 14px;
    font-size: 0.82rem; font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
    white-space: nowrap;
}

.nav__link:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav__link.active { color: var(--accent); background: rgba(167,139,250,0.08); }

.nav__hamburger {
    display: none;
    background: none; border: none; color: var(--text-primary);
    cursor: pointer; padding: 6px;
}

/* Mobile Nav */
@media (max-width: 860px) {
    .nav__hamburger { display: flex; }
    .nav__links {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; padding: var(--space-md);
        background: rgba(6, 6, 11, 0.95);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
    }
    .nav__links.open { display: flex; }
    .nav__link { width: 100%; padding: 12px 16px; }
}

/* ===== Container ===== */
.container {
    width: 100%; max-width: 1200px;
    margin: 0 auto; padding: 0 var(--space-lg);
}

/* ===== Page Hero ===== */
.page-hero {
    position: relative; z-index: 10;
    text-align: center;
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
    animation: fade-up 0.6s var(--ease-out) both;
}

.page-hero__badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 16px;
    font-size: 0.75rem; font-weight: 600;
    color: var(--accent);
    background: rgba(167,139,250,0.08);
    border: 1px solid rgba(167,139,250,0.15);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.page-hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: var(--space-md);
}

.page-hero h1 .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== Feature Cards Grid ===== */
.features-grid {
    position: relative; z-index: 10;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
    padding: 0 var(--space-lg) var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    position: relative;
    display: flex; flex-direction: column;
    padding: var(--space-xl);
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-xl);
    transition: all var(--duration-normal) var(--ease-out);
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.feature-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--card-accent, var(--accent-gradient));
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-active);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(167,139,250,0.08);
}

.feature-card:hover::before { opacity: 1; }

.feature-card__icon {
    display: flex; align-items: center; justify-content: center;
    width: 52px; height: 52px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
    transition: transform var(--duration-normal) var(--ease-spring);
}

.feature-card:hover .feature-card__icon { transform: scale(1.1) rotate(-3deg); }

.feature-card__icon--purple  { background: rgba(167,139,250,0.12); color: var(--purple); }
.feature-card__icon--blue    { background: rgba(96,165,250,0.12); color: var(--blue); }
.feature-card__icon--cyan    { background: rgba(34,211,238,0.12); color: var(--cyan); }
.feature-card__icon--green   { background: rgba(52,211,153,0.12); color: var(--green); }
.feature-card__icon--orange  { background: rgba(251,146,60,0.12); color: var(--orange); }
.feature-card__icon--pink    { background: rgba(244,114,182,0.12); color: var(--pink); }

.feature-card__title {
    font-size: 1.1rem; font-weight: 700;
    margin-bottom: 6px;
}

.feature-card__desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.feature-card__arrow {
    display: flex; align-items: center; gap: 6px;
    margin-top: var(--space-md);
    font-size: 0.8rem; font-weight: 600;
    color: var(--accent);
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover .feature-card__arrow {
    opacity: 1; transform: translateX(0);
}

/* ===== Stats Row ===== */
.stats-row {
    position: relative; z-index: 10;
    display: flex; justify-content: center;
    gap: var(--space-3xl);
    padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    animation: fade-up 0.6s var(--ease-out) both;
}

.stat__value {
    font-size: 2rem; font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat__label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

/* ===== Tool Page Layout ===== */
.tool-main {
    position: relative; z-index: 10;
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-3xl);
    width: 100%;
}

/* ===== Dropzone ===== */
.dropzone {
    position: relative;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: var(--space-md);
    padding: var(--space-3xl) var(--space-xl);
    border: 2px dashed rgba(167,139,250,0.2);
    border-radius: var(--radius-xl);
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    max-width: 640px;
    margin: 0 auto;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--accent);
    background: rgba(167,139,250,0.06);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.dropzone.dragover { transform: scale(1.02); }

.dropzone__icon {
    color: var(--accent); opacity: 0.7;
    transition: all var(--duration-normal) var(--ease-out);
}

.dropzone:hover .dropzone__icon { opacity: 1; transform: translateY(-4px); }

.dropzone__title { font-size: 1.2rem; font-weight: 600; }
.dropzone__subtitle { font-size: 0.9rem; color: var(--text-secondary); }
.dropzone__formats {
    font-size: 0.75rem; color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace; letter-spacing: 0.5px;
}

/* ===== Editor Layout ===== */
.editor {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-lg);
    animation: fade-up 0.5s var(--ease-out) both;
}

.editor--single { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }

.panel {
    background: var(--bg-glass);
    backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    display: flex; flex-direction: column;
    gap: var(--space-md);
}

.panel--preview { min-height: 400px; }

.panel-header {
    display: flex; align-items: center;
    justify-content: space-between;
}

.panel-header__title {
    font-size: 0.85rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 1px;
    color: var(--text-secondary);
}

/* ===== Badge ===== */
.badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem; font-weight: 500;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    letter-spacing: 0.5px;
}

.badge--original { background: rgba(96,165,250,0.12); color: var(--info); }
.badge--new      { background: rgba(52,211,153,0.12); color: var(--success); }

.panel--preview {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 480px;
}

/* ===== Preview Canvas ===== */
.preview-wrap {
    position: relative;
    flex: 1;
    width: 100%;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: repeating-conic-gradient(rgba(255,255,255,0.03) 0% 25%, transparent 0% 50%) 50% / 20px 20px;
    padding: var(--space-md);
}

.preview-wrap canvas {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    object-fit: contain;
}

/* Signature preview sizing */
.panel--signature .preview-wrap {
    min-height: 380px;
    padding: var(--space-md);
}

/* ===== File Info ===== */
.file-info {
    display: flex; align-items: center; justify-content: space-between;
    font-size: 0.8rem; color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

.file-info__name { max-width: 60%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ===== Control Groups ===== */
.control-group {
    display: flex; flex-direction: column;
    gap: var(--space-sm);
}

.control-group__label {
    font-size: 0.78rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.8px;
    color: var(--text-secondary);
}

/* ===== Dimensions Row ===== */
.dimensions-row { display: flex; align-items: center; gap: var(--space-sm); }

.input-group {
    flex: 1; display: flex; align-items: center; gap: var(--space-sm);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0 var(--space-md);
    transition: border-color var(--duration-fast);
}

.input-group:focus-within { border-color: var(--border-active); }

.input-group__label {
    font-size: 0.75rem; font-weight: 600;
    color: var(--text-tertiary); user-select: none;
}

.input-group__input {
    width: 100%; background: transparent;
    border: none; outline: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88rem; padding: 10px 0;
    -moz-appearance: textfield;
}

.input-group__input::-webkit-inner-spin-button,
.input-group__input::-webkit-outer-spin-button { -webkit-appearance: none; }

/* ===== Lock Button ===== */
.link-btn {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.04);
    color: var(--accent); cursor: pointer;
    transition: all var(--duration-fast);
    flex-shrink: 0;
}

.link-btn:hover { background: rgba(167,139,250,0.1); border-color: var(--border-active); }
.link-btn.unlocked { color: var(--text-tertiary); }

/* ===== Preset Buttons ===== */
/* ===== Category Select & Dropdown ===== */
.select-wrapper {
    position: relative;
    width: 100%;
}

.category-select {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: all var(--duration-fast);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23a78bfa' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.category-select option {
    background: #1e1b4b;
    color: #f8fafc;
    padding: 8px;
}

[data-theme="light"] .category-select option {
    background: #ffffff;
    color: #0f172a;
}

.category-select:focus, .category-select:hover {
    border-color: var(--border-active);
    box-shadow: 0 0 12px var(--accent-glow);
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: var(--space-sm);
    max-height: 260px;
    overflow-y: auto;
    padding-right: 4px;
}

.preset-grid::-webkit-scrollbar {
    width: 6px;
}
.preset-grid::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.02);
    border-radius: 3px;
}
.preset-grid::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
.preset-grid::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

.preset-card {
    display: flex; flex-direction: column; align-items: center;
    gap: 6px; padding: var(--space-md);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast);
    text-align: center;
}

.preset-card:hover {
    background: rgba(167,139,250,0.06);
    border-color: var(--border-active);
    transform: translateY(-2px);
}

.preset-card.active {
    background: rgba(167,139,250,0.1);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.preset-card__name { font-size: 0.82rem; font-weight: 600; }
.preset-card__size {
    font-size: 0.7rem; color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}
.preset-card__filesize {
    font-size: 0.65rem; color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

/* ===== Scale Presets ===== */
.scale-presets { display: flex; gap: 6px; flex-wrap: wrap; }

.preset-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem; font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.03);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast);
}

.preset-btn:hover { background: rgba(167,139,250,0.08); color: var(--text-primary); border-color: var(--border-active); }
.preset-btn.active {
    background: var(--accent-gradient); color: #fff;
    border-color: transparent;
    box-shadow: 0 2px 12px var(--accent-glow);
}

/* ===== Slider ===== */
.slider-row { display: flex; align-items: center; gap: var(--space-md); }

.slider {
    flex: 1; -webkit-appearance: none; appearance: none;
    height: 6px; border-radius: 3px;
    background: rgba(255,255,255,0.08);
    outline: none; cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--accent-gradient);
    box-shadow: 0 0 10px var(--accent-glow);
    cursor: grab; transition: transform var(--duration-fast);
}

.slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.slider::-webkit-slider-thumb:active { cursor: grabbing; transform: scale(1.1); }

.slider::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--accent-gradient);
    box-shadow: 0 0 10px var(--accent-glow);
    border: none; cursor: grab;
}

.slider-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem; color: var(--accent);
    min-width: 40px; text-align: right; font-weight: 500;
}

.quality-labels {
    display: flex; justify-content: space-between;
    font-size: 0.7rem; color: var(--text-tertiary);
}

/* ===== Format Options ===== */
.format-options { display: flex; gap: 8px; }

.format-btn {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem; font-weight: 600;
    padding: 10px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.03);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast);
    letter-spacing: 0.5px;
}

.format-btn:hover { background: rgba(167,139,250,0.08); color: var(--text-primary); border-color: var(--border-active); }
.format-btn.active {
    background: var(--accent-gradient); color: #fff;
    border-color: transparent;
    box-shadow: 0 2px 12px var(--accent-glow);
}

/* ===== Output Estimate ===== */
.output-estimate {
    display: flex; flex-direction: column; gap: var(--space-sm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
}

.output-estimate__row {
    display: flex; justify-content: space-between;
    font-size: 0.8rem; color: var(--text-secondary);
}

.output-estimate__value {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary); font-weight: 500;
}

.output-estimate__value--green { color: var(--success); }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: var(--space-sm);
    font-family: 'Inter', sans-serif; font-weight: 600;
    border: none; border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    white-space: nowrap; font-size: 0.85rem;
}

.btn--sm { padding: 8px 16px; font-size: 0.8rem; }
.btn--md { padding: 10px 20px; }
.btn--lg { padding: 14px 24px; font-size: 0.9rem; }
.btn--xl { padding: 16px 32px; font-size: 0.95rem; }

.btn--primary {
    background: var(--accent-gradient); color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn--primary:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 6px 28px rgba(167,139,250,0.4);
    transform: translateY(-1px);
}

.btn--secondary {
    background: rgba(255,255,255,0.06); color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn--secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--border-active); }

.btn--ghost {
    background: transparent; color: var(--text-secondary);
    padding: 6px 12px; font-size: 0.8rem;
}
.btn--ghost:hover { color: var(--accent); background: rgba(167,139,250,0.08); }

.action-buttons {
    display: flex; gap: var(--space-sm); margin-top: var(--space-sm);
}
.action-buttons .btn { flex: 1; }

/* ===== Footer ===== */
.footer {
    position: relative; z-index: 10;
    border-top: 1px solid var(--border);
    padding: var(--space-2xl) var(--space-lg);
}

.footer__inner {
    max-width: 1200px; margin: 0 auto;
    display: flex; flex-wrap: wrap;
    gap: var(--space-2xl);
}

.footer__col { min-width: 180px; }

.footer__heading {
    font-size: 0.8rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.footer__links { list-style: none; }

.footer__links li { margin-bottom: var(--space-sm); }
.footer__links a {
    font-size: 0.85rem; color: var(--text-tertiary);
    transition: color var(--duration-fast);
}
.footer__links a:hover { color: var(--accent); }

.footer__bottom {
    max-width: 1200px; margin: var(--space-xl) auto 0;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: var(--space-md);
}

.footer__copy { font-size: 0.78rem; color: var(--text-tertiary); }
.footer__privacy {
    font-size: 0.75rem; color: var(--text-tertiary);
    display: flex; align-items: center; gap: 6px;
}
.footer__privacy svg { color: var(--success); }

/* ===== Toast ===== */
.toast-container {
    position: fixed; bottom: 24px; right: 24px;
    z-index: 9999;
    display: flex; flex-direction: column; gap: var(--space-sm);
}

.toast {
    display: flex; align-items: center; gap: var(--space-sm);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--bg-glass-border);
    color: var(--text-primary);
    font-size: 0.85rem;
    box-shadow: var(--shadow-md);
    animation: toast-in 0.4s var(--ease-out) both;
}

.toast--success { border-left: 3px solid var(--success); }
.toast--error   { border-left: 3px solid var(--danger); }
.toast--info    { border-left: 3px solid var(--info); }

@keyframes toast-in  { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toast-out { from { opacity: 1; transform: translateX(0); }   to { opacity: 0; transform: translateX(40px); } }
@keyframes fade-up   { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fade-in   { from { opacity: 0; } to { opacity: 1; } }

/* ===== Converter Page Styles ===== */
.converter-zone {
    max-width: 640px; margin: 0 auto;
    display: flex; flex-direction: column; gap: var(--space-lg);
}

.converter-result {
    padding: var(--space-xl);
    background: var(--bg-glass);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(24px);
    text-align: center;
    display: none;
    flex-direction: column; align-items: center; gap: var(--space-md);
    animation: fade-up 0.4s var(--ease-out) both;
}

.converter-result.show { display: flex; }

.converter-result__icon { font-size: 3rem; }
.converter-result__title { font-size: 1.1rem; font-weight: 600; }
.converter-result__info { font-size: 0.85rem; color: var(--text-secondary); }

/* Progress bar */
.progress-bar {
    width: 100%; height: 6px;
    background: rgba(255,255,255,0.06);
    border-radius: 3px; overflow: hidden;
    display: none;
}

.progress-bar.show { display: block; }

.progress-bar__fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
    transition: width 0.3s var(--ease-out);
    width: 0%;
}

/* ===== SEO Content Section ===== */
.seo-content {
    position: relative; z-index: 10;
    max-width: 800px; margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

.seo-content h2 {
    font-size: 1.4rem; font-weight: 700;
    margin-bottom: var(--space-md);
}

.seo-content h3 {
    font-size: 1.1rem; font-weight: 600;
    margin: var(--space-xl) 0 var(--space-sm);
    color: var(--accent);
}

.seo-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.seo-content ul {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    padding-left: var(--space-xl);
    line-height: 1.8;
}

/* ===== Responsive ===== */
@media (max-width: 860px) {
    .editor { grid-template-columns: 1fr; }
    .panel--preview { min-height: 300px; }
    .features-grid { grid-template-columns: 1fr; }
    .stats-row { gap: var(--space-xl); }
}

@media (max-width: 560px) {
    .page-hero { padding: var(--space-2xl) var(--space-md) var(--space-xl); }
    .page-hero h1 { font-size: 1.7rem; }
    .features-grid { padding: 0 var(--space-md) var(--space-2xl); }
    .tool-main { padding: 0 var(--space-md) var(--space-2xl); }
    .panel { padding: var(--space-md); }
    .dropzone { padding: var(--space-2xl) var(--space-md); }
    .preset-grid { grid-template-columns: repeat(2, 1fr); }
    .action-buttons { flex-direction: column; }
    .footer__inner { flex-direction: column; gap: var(--space-xl); }
}

/* ===== Light Mode Overrides ===== */
[data-theme="light"] .bg-grid {
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.04) 1px, transparent 1px);
}

[data-theme="light"] .bg-glow { opacity: 0.15; }

[data-theme="light"] .nav {
    background: rgba(244, 244, 248, 0.85);
}

[data-theme="light"] .nav__link:hover {
    background: rgba(0,0,0,0.04);
}

[data-theme="light"] .nav__link.active {
    background: rgba(124,58,237,0.08);
}

@media (max-width: 860px) {
    [data-theme="light"] .nav__links {
        background: rgba(244, 244, 248, 0.97);
    }
}

[data-theme="light"] .dropzone {
    border-color: rgba(124, 58, 237, 0.2);
    background: var(--bg-glass);
}

[data-theme="light"] .dropzone:hover,
[data-theme="light"] .dropzone.dragover {
    background: rgba(124, 58, 237, 0.04);
    border-color: var(--accent);
}

[data-theme="light"] .input-group {
    background: rgba(0,0,0,0.03);
}

[data-theme="light"] .link-btn {
    background: rgba(0,0,0,0.03);
}

[data-theme="light"] .link-btn:hover {
    background: rgba(124,58,237,0.08);
}

[data-theme="light"] .preset-card {
    background: rgba(0,0,0,0.02);
}

[data-theme="light"] .preset-card:hover {
    background: rgba(124,58,237,0.05);
}

[data-theme="light"] .preset-card.active {
    background: rgba(124,58,237,0.08);
}

[data-theme="light"] .preset-btn {
    background: rgba(0,0,0,0.03);
}

[data-theme="light"] .preset-btn:hover {
    background: rgba(124,58,237,0.06);
}

[data-theme="light"] .slider {
    background: rgba(0,0,0,0.08);
}

[data-theme="light"] .format-btn {
    background: rgba(0,0,0,0.03);
}

[data-theme="light"] .format-btn:hover {
    background: rgba(124,58,237,0.06);
}

[data-theme="light"] .output-estimate {
    background: rgba(0,0,0,0.02);
}

[data-theme="light"] .btn--secondary {
    background: rgba(0,0,0,0.04);
}

[data-theme="light"] .btn--secondary:hover {
    background: rgba(0,0,0,0.08);
}

[data-theme="light"] .btn--ghost:hover {
    background: rgba(124,58,237,0.06);
}

[data-theme="light"] .theme-toggle {
    background: rgba(0,0,0,0.04);
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(124,58,237,0.08);
}

[data-theme="light"] .toast {
    background: rgba(255,255,255,0.95);
}

[data-theme="light"] .feature-card__icon--purple  { background: rgba(139,92,246,0.1); }
[data-theme="light"] .feature-card__icon--blue    { background: rgba(37,99,235,0.1); }
[data-theme="light"] .feature-card__icon--cyan    { background: rgba(6,182,212,0.1); }
[data-theme="light"] .feature-card__icon--green   { background: rgba(5,150,105,0.1); }
[data-theme="light"] .feature-card__icon--orange  { background: rgba(234,88,12,0.1); }
[data-theme="light"] .feature-card__icon--pink    { background: rgba(219,39,119,0.1); }

[data-theme="light"] .progress-bar {
    background: rgba(0,0,0,0.06);
}

[data-theme="light"] .preview-wrap {
    background: repeating-conic-gradient(rgba(0,0,0,0.04) 0% 25%, transparent 0% 50%) 50% / 20px 20px;
}

[data-theme="light"] .badge--original { background: rgba(37,99,235,0.1); }
[data-theme="light"] .badge--new      { background: rgba(5,150,105,0.1); }

[data-theme="light"] .page-hero__badge {
    background: rgba(124,58,237,0.06);
    border-color: rgba(124,58,237,0.15);
}

/* ===== FAQ Section & SEO ===== */
.faq-section {
    max-width: 860px;
    margin: 48px auto 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    position: relative;
    z-index: 10;
}

.faq-title {
    font-size: 1.6rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--space-sm);
}

.faq-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.faq-item {
    background: var(--bg-glass);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    backdrop-filter: blur(16px);
    transition: all var(--duration-fast);
}

.faq-item:hover {
    border-color: var(--border-active);
    box-shadow: 0 4px 20px rgba(167, 139, 250, 0.08);
}

.faq-question {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-question::before {
    content: '❓';
    font-size: 0.9rem;
}

.faq-answer {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Crop Modal & Overlay ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 680px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    box-shadow: var(--shadow-lg), 0 0 50px rgba(167, 139, 250, 0.15);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

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

.crop-workspace {
    position: relative;
    width: 100%;
    height: 380px;
    background: #09090b;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.crop-workspace canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

.crop-box-overlay {
    position: absolute;
    border: 2px dashed var(--accent);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6), 0 0 20px var(--accent-glow);
    cursor: move;
    box-sizing: border-box;
}

.crop-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border: 2px solid #ffffff;
    border-radius: 50%;
}

.handle-nw { top: -6px; left: -6px; cursor: nwse-resize; }
.handle-ne { top: -6px; right: -6px; cursor: nesw-resize; }
.handle-sw { bottom: -6px; left: -6px; cursor: nesw-resize; }
.handle-se { bottom: -6px; right: -6px; cursor: nwse-resize; }

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    margin-top: 8px;
}