/* ========================================
   üstündene.com — Neon Green Dark Landing
   ======================================== */

:root {
    --bg: #09090b;
    --bg-elevated: #0f0f12;
    --bg-card: rgba(255,255,255,0.06);
    --bg-card-hover: rgba(255,255,255,0.09);
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.14);
    --text: #f5f5f4;
    --text-2: #a8a29e;
    --text-3: #57534e;
    --accent: #00e676;
    --accent-soft: rgba(0,230,118,0.12);
    --accent-glow: rgba(0,230,118,0.06);
    --cta: #00c853;
    --cta-hover: #00a844;
    --cta-text: #09090b;
    --success: #00e676;
    --radius: 12px;
    --radius-lg: 20px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection { background: var(--accent-soft); color: var(--accent); }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* ==================
   Buttons
   ================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font);
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: -0.01em;
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary {
    background: var(--cta);
    color: var(--cta-text);
    font-weight: 600;
}
.btn-primary:hover {
    background: var(--cta-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0,200,83,0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-hover);
}
.btn-outline:hover {
    border-color: rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.03);
}

.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* ==================
   Navbar
   ================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: all var(--transition);
}
.navbar.scrolled {
    background: rgba(9,9,11,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.03em;
}
.logo-mark {
    width: 32px;
    height: 32px;
    object-fit: contain;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}
.nav-links a {
    font-size: 14px;
    color: var(--text-2);
    transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
}
.mobile-menu {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    z-index: 200;
    flex-direction: column;
    padding: 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
}
.mobile-menu-close {
    background: none;
    border: none;
    color: var(--text);
    font-size: 28px;
    cursor: pointer;
}
.mobile-menu-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.mobile-menu-links a {
    font-size: 20px;
    font-weight: 500;
}
.mobile-menu-actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ==================
   Hero
   ================== */
.hero {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
}
.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(0,230,118,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
}
.hero .container {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 60px;
    align-items: center;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--accent-soft);
    border: 1px solid rgba(0,230,118,0.15);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}
.hero-eyebrow-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.035em;
    margin-bottom: 16px;
}
.hero-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #69f0ae 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 17px;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 28px;
    max-width: 520px;
}
.hero-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}
.hero-metrics {
    display: flex;
    gap: 24px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.hero-metric {
    text-align: center;
}
.hero-metric-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}
.hero-metric-label {
    font-size: 11px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.hero-metric-sep {
    width: 1px;
    background: var(--border);
}

/* Hero Right - Phone Mockup */
.hero-right {
    display: flex;
    justify-content: center;
    position: relative;
}
.phone-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0,230,118,0.1) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}
.demo-phone {
    position: relative;
    z-index: 1;
}
.phone-frame {
    width: 280px;
    height: 580px;
    background: #1a1a1e;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.08);
    position: relative;
}
.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 28px;
    background: #1a1a1e;
    border-radius: 0 0 16px 16px;
    z-index: 2;
}
.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    background: var(--bg);
}
.phone-screen iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ==================
   Section common
   ================== */
.section-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
}
.section-heading {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 12px;
}
.section-desc {
    font-size: 17px;
    color: var(--text-2);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.6;
}
.text-center { text-align: center; }

/* ==================
   Problem
   ================== */
.problem {
    padding: 100px 0;
}
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.problem-card {
    padding: 28px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.problem-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}
.problem-icon {
    font-size: 28px;
    margin-bottom: 16px;
}
.problem-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}
.problem-card p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
}

/* ==================
   Features
   ================== */
.features {
    padding: 100px 0;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.feature-card {
    padding: 28px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}
.fc-highlight {
    background: linear-gradient(135deg, var(--accent-glow), var(--bg-card));
    border: 1px solid rgba(0,230,118,0.2);
}
.fc-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    border-radius: 10px;
    margin-bottom: 16px;
    color: var(--accent);
    font-size: 20px;
}
.feature-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}
.feature-card p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
}

/* ==================
   How It Works
   ================== */
.how-it-works {
    padding: 100px 0;
}
.flow-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 48px;
    margin-top: 48px;
    min-height: 440px;
}
.flow-steps {
    position: relative;
}
.flow-progress {
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}
.flow-progress-bar {
    width: 100%;
    background: var(--accent);
    transition: height 0.4s ease;
    border-radius: 1px;
}
.flow-step {
    display: flex;
    gap: 16px;
    padding: 14px 0;
    cursor: pointer;
    position: relative;
}
.flow-step-dot {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    z-index: 1;
}
.flow-step.active .flow-step-dot {
    background: var(--accent);
    border-color: var(--accent);
}
.flow-step-num {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-3);
}
.flow-step.active .flow-step-num {
    color: var(--cta-text);
}
.flow-step-content h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-3);
    transition: color var(--transition);
}
.flow-step.active .flow-step-content h4 {
    color: var(--text);
}
.flow-step-content p {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.5;
    display: none;
}
.flow-step.active .flow-step-content p {
    display: block;
    color: var(--text-2);
}

.flow-visual {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}
.flow-scene {
    display: none;
    text-align: center;
    padding: 40px;
}
.flow-scene.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.flow-scene-icon {
    font-size: 64px;
}
.flow-scene-title {
    font-size: 18px;
    font-weight: 600;
}
.flow-scene-desc {
    font-size: 14px;
    color: var(--text-2);
    max-width: 360px;
    line-height: 1.6;
}

/* ==================
   Pricing
   ================== */
.pricing {
    padding: 100px 0;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.price-card {
    padding: 36px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    transition: all var(--transition);
}
.price-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}
.price-card.featured {
    background: linear-gradient(180deg, rgba(0,230,118,0.06), var(--bg-card));
    border-color: rgba(0,230,118,0.25);
}
.featured-label {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--accent);
    color: var(--cta-text);
    font-size: 11px;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.price-header {
    margin-bottom: 24px;
}
.price-header h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}
.price-header .price-desc {
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 16px;
}
.price-amount {
    display: flex;
    align-items: baseline;
    gap: 4px;
}
.price-currency {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-2);
}
.price-value {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.03em;
}
.price-period {
    font-size: 14px;
    color: var(--text-3);
    margin-left: 4px;
}
.price-per-tryon {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    background: var(--accent-soft);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
}
.price-features {
    list-style: none;
    margin: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.price-features li {
    font-size: 14px;
    color: var(--text-2);
    display: flex;
    align-items: center;
    gap: 10px;
}
.price-features li::before {
    content: '';
    width: 18px;
    height: 18px;
    min-width: 18px;
    border-radius: 50%;
    background: rgba(0,230,118,0.15);
    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='%2300e676' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

/* ==================
   FAQ
   ================== */
.faq {
    padding: 100px 0;
}
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    font-weight: 500;
    text-align: left;
    padding: 20px 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.faq-question:hover { color: var(--accent); }
.faq-chevron {
    font-size: 18px;
    color: var(--text-3);
    transition: transform var(--transition);
}
.faq-item.open .faq-chevron {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.faq-answer-inner {
    padding: 0 0 20px;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ==================
   Final CTA
   ================== */
.final-cta {
    padding: 80px 0 60px;
}
.cta-card {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(180deg, var(--accent-glow), transparent);
    border: 1px solid rgba(0,230,118,0.12);
    border-radius: var(--radius-lg);
}
.cta-card h2 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}
.cta-card p {
    color: var(--text-2);
    font-size: 16px;
    margin-bottom: 28px;
}

/* ==================
   Footer
   ================== */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}
.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}
.footer-brand p {
    color: var(--text-3);
    font-size: 13px;
    margin-top: 8px;
    max-width: 260px;
}
.footer-cols {
    display: flex;
    gap: 64px;
}
.footer-col h4 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-3);
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 10px;
    transition: color var(--transition);
}
.footer-col a:hover { color: var(--text); }
.footer-bottom {
    text-align: center;
    font-size: 12px;
    color: var(--text-3);
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

/* ==================
   Sticky CTA
   ================== */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(9,9,11,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    padding: 12px 0;
    z-index: 90;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}
.sticky-cta.visible {
    transform: translateY(0);
}
.sticky-cta .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sticky-cta-text {
    font-size: 14px;
    font-weight: 500;
}
.sticky-cta-text span {
    color: var(--accent);
}

/* ==================
   Trust signals
   ================== */
.trust-bar {
    padding: 48px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.trust-items {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}
.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-2);
}
.trust-icon {
    color: var(--accent);
    font-size: 16px;
}

/* ==================
   Reveal animation
   ================== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================
   Responsive
   ================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-metrics { justify-content: center; }
    .hero-right { order: -1; }
}

@media (max-width: 768px) {
    .nav-links, .nav-actions { display: none; }
    .mobile-menu-btn { display: block; }

    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 34px; }
    .hero-desc { font-size: 15px; }

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

    .flow-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .flow-visual { min-height: 280px; }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .section-heading { font-size: 28px; }
    .section-desc { font-size: 15px; }

    .footer-top { flex-direction: column; gap: 32px; }
    .footer-cols { gap: 32px; flex-wrap: wrap; }

    .hero-metrics { flex-direction: column; gap: 12px; }
    .hero-metric-sep { display: none; }

    .phone-frame { width: 240px; height: 500px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 28px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .price-card { padding: 28px 20px; }
    .cta-card { padding: 40px 20px; }
    .cta-card h2 { font-size: 24px; }
}