/* ===== Gravlabs Design System ===== */
:root {
    --bg: #0F0F1A;
    --bg-secondary: #1A1A2E;
    --text: #E8E8F0;
    --text-secondary: #A0A0B8;
    --accent: #6C63FF;
    --accent-hover: #7C74FF;
    --accent-light: rgba(108, 99, 255, 0.12);
    --cta: #FF6B6B;
    --cta-hover: #FF8585;
    --success: #34D399;
    --success-light: rgba(52, 211, 153, 0.12);
    --blue: #60A5FA;
    --blue-light: rgba(96, 165, 250, 0.12);
    --purple: #A78BFA;
    --purple-light: rgba(167, 139, 250, 0.12);
    --teal: #2DD4BF;
    --teal-light: rgba(45, 212, 191, 0.12);
    --pink: #F472B6;
    --pink-light: rgba(244, 114, 182, 0.12);
    --orange: #FB923C;
    --orange-light: rgba(251, 146, 60, 0.12);
    --border: #2A2A3E;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: all 0.2s ease;
}

/* Dark mode only — no theme switching */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
    position: sticky;
    top: 0;
    border-bottom: 1px solid var(--border);
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(15, 15, 26, 0.9);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.3rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: scale(1.05);
}

/* ===== Hero ===== */
.hero {
    text-align: center;
    padding: 80px 0 60px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg) 100%);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.highlight {
    background: linear-gradient(135deg, var(--accent), var(--teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Tools Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    padding: 20px 0 60px;
}

.tool-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-decoration: none;
    color: var(--text);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.tool-card:nth-child(1) { border-left: 4px solid var(--accent); }
.tool-card:nth-child(1):hover { border-color: var(--accent); background: var(--accent-light); }
.tool-card:nth-child(2) { border-left: 4px solid var(--blue); }
.tool-card:nth-child(2):hover { border-color: var(--blue); background: var(--blue-light); }
.tool-card:nth-child(3) { border-left: 4px solid var(--teal); }
.tool-card:nth-child(3):hover { border-color: var(--teal); background: var(--teal-light); }
.tool-card:nth-child(4) { border-left: 4px solid var(--purple); }
.tool-card:nth-child(4):hover { border-color: var(--purple); background: var(--purple-light); }
.tool-card:nth-child(5) { border-left: 4px solid var(--pink); }
.tool-card:nth-child(5):hover { border-color: var(--pink); background: var(--pink-light); }
.tool-card:nth-child(6) { border-left: 4px solid var(--orange); }
.tool-card:nth-child(6):hover { border-color: var(--orange); background: var(--orange-light); }

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.tool-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tool-badge {
    display: inline-block;
    margin-top: 16px;
    padding: 4px 12px;
    background: var(--accent);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-badge.coming-soon {
    background: var(--text-secondary);
    opacity: 0.6;
}

/* ===== Trust Section ===== */
.trust-section {
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    text-align: center;
}

.trust-item {
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.trust-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 12px;
}

.trust-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.trust-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Tool Page Specific ===== */
.tool-page {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.tool-page h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.tool-page .subtitle {
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(74, 144, 217, 0.05);
}

.drop-zone p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-cta {
    background: var(--cta);
    color: white;
}

.btn-cta:hover {
    background: var(--cta-hover);
    transform: translateY(-1px);
}

.quality-slider {
    width: 100%;
    margin: 20px 0;
}

.results {
    margin-top: 30px;
}

.result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.result-card img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.result-info {
    flex: 1;
}

.result-info .filename {
    font-weight: 600;
    margin-bottom: 4px;
}

.result-info .sizes {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.savings {
    color: var(--success);
    font-weight: 600;
}

/* ===== Cookie Banner ===== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
    flex-wrap: wrap;
}

.cookie-banner p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex: 1;
    min-width: 200px;
}

.cookie-banner .cookie-btns {
    display: flex;
    gap: 8px;
}

.cookie-banner .btn {
    padding: 8px 16px;
    font-size: 0.8rem;
}

.cookie-banner.hidden {
    display: none;
}

/* ===== Email Capture ===== */
.email-capture {
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.1), rgba(45, 212, 191, 0.1));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    margin: 40px 0;
}

.email-capture h3 {
    margin-bottom: 8px;
}

.email-capture p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.email-form {
    display: flex;
    gap: 10px;
    max-width: 450px;
    margin: 0 auto;
}

.email-form input {
    flex: 1;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.95rem;
}

.email-form input::placeholder {
    color: var(--text-secondary);
}

@media (max-width: 500px) {
    .email-form {
        flex-direction: column;
    }
    .cookie-banner {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== Preview Thumbnails ===== */
.preview-thumbs {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 10px 0;
    max-width: 100%;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-secondary);
}

.preview-thumbs::-webkit-scrollbar {
    height: 6px;
}

.preview-thumbs::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

.preview-thumbs::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 3px;
}

.preview-thumbs img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    border: 2px solid var(--border);
    scroll-snap-align: start;
    flex-shrink: 0;
    transition: var(--transition);
}

.preview-thumbs img:hover {
    border-color: var(--accent);
    transform: scale(1.03);
}

.thumb-wrapper {
    position: relative;
    flex-shrink: 0;
    scroll-snap-align: start;
    transition: transform 0.2s ease, margin 0.2s ease;
    user-select: none;
}

.thumb-wrapper.dragging {
    opacity: 0.4;
    transform: scale(0.95);
}

.thumb-wrapper.drag-left {
    margin-left: 40px;
}

.thumb-wrapper.drag-right {
    margin-right: 40px;
}

.drag-ghost {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    width: 150px;
    height: 150px;
    border-radius: 12px;
    border: 2px solid var(--accent);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.4);
    opacity: 0.9;
    transform: scale(1.05) rotate(2deg);
    object-fit: cover;
    transition: none;
}

.drag-chosen {
    opacity: 0.5;
}

.drag-ghost-sortable {
    opacity: 0.9 !important;
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.4) !important;
    border: 2px solid var(--accent) !important;
    border-radius: 12px !important;
}

.thumb-wrapper .thumb-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 22px;
    height: 22px;
    background: var(--cta);
    color: white;
    border: 2px solid var(--bg);
    border-radius: 50%;
    font-size: 12px;
    line-height: 18px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 2;
}

.thumb-wrapper:hover .thumb-remove {
    opacity: 1;
}

.thumb-wrapper img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    border: 2px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.thumb-wrapper img:hover {
    border-color: var(--accent);
}

.thumb-wrapper img.active {
    border-color: var(--accent);
    opacity: 1 !important;
}

.preview-scroll-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* ===== Feedback Section ===== */
.feedback-section {
    margin-top: 50px;
    padding: 30px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.feedback-section h3 {
    margin-bottom: 6px;
    font-size: 1rem;
}

.feedback-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.feedback-form {
    display: flex;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}

.feedback-form textarea {
    flex: 1;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.9rem;
    resize: none;
    height: 42px;
}

.feedback-form textarea::placeholder {
    color: var(--text-secondary);
}

@media (max-width: 500px) {
    .feedback-form {
        flex-direction: column;
    }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero {
        padding: 50px 0 40px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .trust-items {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}