/* =============================================
   SnapDrobe | Landing Page
   ============================================= */

:root {
    --bg: #0a0a0b;
    --surface: #141416;
    --surface-2: #1c1c20;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text: #f0f0f2;
    --text-secondary: #8a8a96;
    --text-dim: #55555f;
    --accent: #a78bfa;
    --accent-bright: #c4b5fd;
    --accent-dim: rgba(167, 139, 250, 0.12);
    --red: #f87171;
    --green: #34d399;
    --blue: #60a5fa;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Nav ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    backdrop-filter: blur(24px) saturate(1.2);
    -webkit-backdrop-filter: blur(24px) saturate(1.2);
    background: rgba(10, 10, 11, 0.75);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 0.85rem;
}

.nav-links a {
    color: var(--text-secondary);
    transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
    padding: 7px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text) !important;
    transition: all 0.2s;
}
.nav-cta:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

/* ---- Buttons ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--accent);
    color: #0a0a0b;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    letter-spacing: -0.01em;
}
.btn-primary:hover {
    background: var(--accent-bright);
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(167, 139, 250, 0.25);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}
.btn-secondary:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

/* ===== HERO ===== */
.hero {
    padding: 140px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 80px;
    align-items: center;
}

.hero-text { max-width: 520px; }

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: 20px;
}

.accent {
    color: var(--accent);
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 32px;
}
.hero-sub em {
    color: var(--text);
    font-style: normal;
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ---- Phone Mockup ---- */
.hero-phone {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: var(--surface);
    border-radius: 36px;
    border: 2px solid rgba(255, 255, 255, 0.08);
    padding: 8px;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.03),
        0 30px 80px -20px rgba(0, 0, 0, 0.6),
        0 0 100px rgba(167, 139, 250, 0.06);
}

.phone-notch {
    width: 100px;
    height: 6px;
    background: var(--bg);
    border-radius: 10px;
    margin: 8px auto 6px;
    opacity: 0.6;
}

.card-stack {
    flex: 1;
    position: relative;
    margin: 0 8px;
    overflow: hidden;
    border-radius: 18px;
}

.card {
    position: absolute;
    inset: 0;
    border-radius: 18px;
    overflow: hidden;
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.5s ease;
    will-change: transform, opacity;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}

.card-3 {
    transform: scale(0.9) translateY(16px);
    opacity: 0.3;
    z-index: 1;
}

.card-2 {
    transform: scale(0.95) translateY(8px);
    opacity: 0.6;
    z-index: 2;
}

.card-1 {
    transform: scale(1);
    opacity: 1;
    z-index: 3;
}

/* Swipe animation states */
.card.swiping-right {
    transform: translateX(120%) rotate(12deg) !important;
    opacity: 0 !important;
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.35s ease !important;
}

.card.swiping-left {
    transform: translateX(-120%) rotate(-12deg) !important;
    opacity: 0 !important;
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.35s ease !important;
}

.card.promote-to-front {
    transform: scale(1) translateY(0) !important;
    opacity: 1 !important;
    z-index: 3 !important;
}

.card.promote-to-middle {
    transform: scale(0.95) translateY(8px) !important;
    opacity: 0.6 !important;
    z-index: 2 !important;
}

/* Like/Dislike overlay stamps */
.card::after {
    position: absolute;
    top: 24px;
    font-size: 1.4rem;
    font-weight: 900;
    padding: 6px 16px;
    border-radius: 8px;
    border: 3px solid;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 10;
    letter-spacing: 0.05em;
}

.card.show-like::after {
    content: 'LIKE';
    right: 16px;
    color: var(--green);
    border-color: var(--green);
    background: rgba(52, 211, 153, 0.1);
    opacity: 1;
    transform: rotate(12deg);
}

.card.show-dislike::after {
    content: 'NOPE';
    left: 16px;
    color: var(--red);
    border-color: var(--red);
    background: rgba(248, 113, 113, 0.1);
    opacity: 1;
    transform: rotate(-12deg);
}

/* ---- Swipe Finger ---- */
.swipe-finger {
    position: absolute;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    pointer-events: none;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.6));
    transition: opacity 0.4s;
}

.finger-emoji {
    font-size: 48px;
    display: block;
    line-height: 1;
}

.swipe-finger.finger-hidden {
    opacity: 0 !important;
    transition: opacity 0.3s;
}

.swipe-finger.finger-swipe-right {
    animation: fingerRight 1.1s ease-in-out forwards;
}

.swipe-finger.finger-swipe-left {
    animation: fingerLeft 1.1s ease-in-out forwards;
}

@keyframes fingerRight {
    0%   { transform: translateX(-50%); opacity: 0; }
    10%  { transform: translateX(-50%); opacity: 1; }
    25%  { transform: translateX(-50%) scale(0.92); opacity: 1; }
    75%  { transform: translateX(70px) scale(0.92); opacity: 1; }
    100% { transform: translateX(90px) scale(1); opacity: 0; }
}

@keyframes fingerLeft {
    0%   { transform: translateX(-50%); opacity: 0; }
    10%  { transform: translateX(-50%); opacity: 1; }
    25%  { transform: translateX(-50%) scale(0.92); opacity: 1; }
    75%  { transform: translateX(-70px) scale(0.92); opacity: 1; }
    100% { transform: translateX(-90px) scale(1); opacity: 0; }
}

.card-stack {
    cursor: grab;
}

.card-stack:active {
    cursor: grabbing;
}

.phone-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    padding: 12px 0 8px;
}

.action-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.action-dislike {
    color: var(--red);
    border-color: rgba(248, 113, 113, 0.3);
}
.action-dislike:hover, .action-dislike.pulse {
    background: rgba(248, 113, 113, 0.1);
    border-color: var(--red);
    transform: scale(1.1);
}

.action-shop {
    color: var(--blue);
    border-color: rgba(96, 165, 250, 0.3);
}
.action-shop:hover {
    background: rgba(96, 165, 250, 0.1);
    border-color: var(--blue);
    transform: scale(1.1);
}

.action-like {
    color: var(--green);
    border-color: rgba(52, 211, 153, 0.3);
}
.action-like:hover, .action-like.pulse {
    background: rgba(52, 211, 153, 0.1);
    border-color: var(--green);
    transform: scale(1.1);
}

/* ---- Proof Bar ---- */
.proof-bar {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 28px 0;
    background: var(--surface);
}

.proof-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.proof-item {
    text-align: center;
}

.proof-item strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.proof-item span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.proof-divider {
    width: 1px;
    height: 32px;
    background: var(--border);
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-tag {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    text-align: center;
}

.section h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 16px;
    text-align: center;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto 44px;
    line-height: 1.65;
    text-align: center;
}

/* ---- Steps ---- */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 52px;
}

.step-card {
    padding: 28px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: left;
    transition: all 0.25s;
}
.step-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 800;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.step-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.55;
}

/* ---- Features ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.feature-card {
    padding: 28px 24px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: left;
    transition: border-color 0.2s;
}
.feature-card:hover {
    border-color: var(--border-hover);
}

.feature-icon-wrap {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--accent-dim);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.55;
}

#brands .container {
    text-align: center;
}

/* ---- Benefits ---- */
.benefits-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 44px 0 40px;
}

.benefit-card {
    padding: 28px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: center;
}

.benefit-num {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--accent);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
}

/* ---- CTA ---- */
.section-cta {
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, var(--accent-dim) 0%, transparent 60%);
    border-top: 1px solid var(--border);
}

.signup-form {
    display: flex;
    gap: 10px;
    max-width: 420px;
    margin: 0 auto;
    justify-content: center;
    flex-wrap: wrap;
}

.signup-form input {
    flex: 1;
    min-width: 220px;
    padding: 12px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}
.signup-form input:focus {
    border-color: var(--accent);
}
.signup-form input::placeholder {
    color: var(--text-dim);
}

/* ---- Footer ---- */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
}

.footer-left .logo {
    display: block;
    margin-bottom: 8px;
}

.footer-left p {
    color: var(--text-dim);
    font-size: 0.82rem;
    line-height: 1.5;
}

.footer-right {
    display: flex;
    gap: 24px;
    font-size: 0.85rem;
}

.footer-right a {
    color: var(--text-secondary);
    transition: color 0.15s;
}
.footer-right a:hover { color: var(--text); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    color: var(--text-dim);
    font-size: 0.78rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }
    .hero-text { max-width: 100%; }
    .hero-actions { justify-content: center; }
    .hero-phone { display: flex; justify-content: center; }
    .steps-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .benefits-row { grid-template-columns: 1fr; }
    .proof-inner { flex-direction: column; gap: 20px; }
    .proof-divider { width: 40px; height: 1px; }
}

@media (max-width: 600px) {
    .hero { padding-top: 100px; }
    .phone-frame { width: 250px; height: 500px; }
    .footer-inner { flex-direction: column; gap: 24px; }
    .nav-links a:not(.nav-cta) { display: none; }
}