:root {
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --secondary-gradient: linear-gradient(135deg, #2563eb 0%, #0d9488 100%);
    --accent-gradient: linear-gradient(135deg, #3730a3 0%, #4f46e5 50%, #8b5cf6 100%);

    --bg-main: #0f172a;
    --bg-elevated: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #263449;

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --border-light: #334155;
    --border-focus: #6366f1;

    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.landing {
    overflow-x: hidden;
}

/* ── Navigation ── */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

.landing-nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-main);
}

.landing-nav-brand img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
}

.landing-nav-brand span {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.landing-nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.landing-nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

.landing-nav-link:hover {
    color: var(--text-main);
}

/* ── Buttons ── */
.btn-landing {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
    font-family: inherit;
}

.btn-landing:hover {
    transform: translateY(-1px);
}

.btn-landing-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-landing-primary:hover {
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-landing-secondary {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-light);
}

.btn-landing-secondary:hover {
    border-color: var(--border-focus);
    background: rgba(99, 102, 241, 0.08);
}

.btn-landing-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

/* ── Hero ── */
.landing-hero {
    position: relative;
    padding: 8rem 2rem 5rem;
    text-align: center;
    overflow: hidden;
}

.landing-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99, 102, 241, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 80% 50%, rgba(168, 85, 247, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 40% 30% at 20% 60%, rgba(37, 99, 235, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.landing-hero-content {
    position: relative;
    max-width: 780px;
    margin: 0 auto;
}

.landing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #a5b4fc;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.landing-badge-dot {
    width: 6px;
    height: 6px;
    background: #6366f1;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.landing-hero h1 {
    font-size: clamp(2.75rem, 7vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #f8fafc 0%, #c7d2fe 50%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-hero-subtitle {
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.landing-hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3.5rem;
}

/* ── Stats ── */
.landing-stats {
    display: flex;
    justify-content: center;
    gap: clamp(2rem, 6vw, 5rem);
    flex-wrap: wrap;
    padding: 0 2rem;
}

.landing-stat {
    text-align: center;
}

.landing-stat-value {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.landing-stat-value.text-stat {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.landing-stat-label {
    font-size: 0.8125rem;
    color: var(--text-dim);
    margin-top: 0.25rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ── Section shared ── */
.landing-section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.landing-section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #818cf8;
    margin-bottom: 0.75rem;
}

.landing-section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    line-height: 1.15;
}

.landing-section-desc {
    color: var(--text-muted);
    font-size: 1.0625rem;
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 3rem;
}

/* ── Preview ── */
.landing-preview {
    padding: 2rem 2rem 5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.landing-preview-frame {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    background: var(--bg-elevated);
}

.landing-preview-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 70%, rgba(15, 23, 42, 0.4) 100%);
    pointer-events: none;
    z-index: 1;
}

.landing-preview-frame img {
    width: 100%;
    height: auto;
    display: block;
}

.landing-preview-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.875rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-light);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

.landing-preview-badge .dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

/* ── Feature cards ── */
.landing-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.landing-feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.landing-feature-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.landing-feature-tag {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #818cf8;
    background: rgba(99, 102, 241, 0.12);
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

.landing-feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    letter-spacing: -0.02em;
}

.landing-feature-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.65;
}

.landing-feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    color: #818cf8;
}

/* ── Modes ── */
.landing-modes-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    padding: 5rem 2rem;
}

.landing-modes-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.landing-modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.landing-mode-card {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: border-color 0.2s;
}

.landing-mode-card:hover {
    border-color: rgba(99, 102, 241, 0.35);
}

.landing-mode-key {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    font-size: 1.25rem;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.landing-mode-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
}

.landing-mode-card p {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ── Privacy ── */
.landing-privacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.landing-privacy-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-muted);
}

.landing-privacy-item i {
    color: #818cf8;
    flex-shrink: 0;
}

.landing-privacy-note {
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.65;
}

.landing-privacy-note a {
    color: #818cf8;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ── FAQ ── */
.landing-faq-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-light);
    padding: 5rem 2rem;
}

.landing-faq-inner {
    max-width: 720px;
    margin: 0 auto;
}

.landing-faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.landing-faq-item {
    background: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.landing-faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s;
}

.landing-faq-question:hover {
    background: rgba(99, 102, 241, 0.05);
}

.landing-faq-question i {
    flex-shrink: 0;
    color: var(--text-dim);
    transition: transform 0.2s;
}

.landing-faq-item.open .landing-faq-question i {
    transform: rotate(180deg);
}

.landing-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.landing-faq-item.open .landing-faq-answer {
    max-height: 300px;
}

.landing-faq-answer p {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ── Final CTA ── */
.landing-cta-section {
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.landing-cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 50% at 50% 100%, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.landing-cta-inner {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.landing-cta-inner h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    line-height: 1.15;
}

.landing-cta-inner p {
    color: var(--text-muted);
    font-size: 1.0625rem;
    margin-bottom: 2rem;
}

.landing-cta-trust {
    margin-top: 1.5rem;
    font-size: 0.8125rem;
    color: var(--text-dim);
    letter-spacing: 0.02em;
}

/* ── Footer ── */
.landing-footer {
    padding: 2.5rem 2rem;
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.landing-footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.landing-footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

.landing-footer-copy {
    color: var(--text-dim);
    font-size: 0.8125rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .landing-nav {
        padding: 0.875rem 1.25rem;
    }

    .landing-nav-link {
        display: none;
    }

    .landing-hero {
        padding: 7rem 1.25rem 3.5rem;
    }

    .landing-section,
    .landing-modes-section,
    .landing-faq-section {
        padding: 3.5rem 1.25rem;
    }

    .landing-features-grid {
        grid-template-columns: 1fr;
    }

    .landing-hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-landing-lg {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }
}