/* === VARIABLES === */
:root {
    --color-bg: #0F1419;
    --color-bg-warm: #1A1510;
    --color-surface: #1C2026;
    --color-surface-warm: #231E17;
    --color-amber: #E8A838;
    --color-amber-light: #F2C96D;
    --color-amber-glow: rgba(232, 168, 56, 0.15);
    --color-coral: #E07A5F;
    --color-sage: #81A88D;
    --color-sky: #6B9ECF;
    --color-text: #F5F0EA;
    --color-text-muted: #A09B94;
    --color-text-dim: #6B665F;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Noto Sans KR', 'DM Sans', sans-serif;
    --font-ui: 'DM Sans', 'Noto Sans KR', sans-serif;
}

/* === RESET === */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* === BODY === */
body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* === NAV === */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 1.25rem 2rem;
    display: flex; justify-content: space-between; align-items: center;
    transition: all 0.4s ease;
}
nav.scrolled {
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(232, 168, 56, 0.1);
}
.nav-logo {
    font-family: var(--font-display); font-size: 1.6rem; font-weight: 700;
    color: var(--color-amber); letter-spacing: -0.02em; text-decoration: none;
}
.nav-logo span { color: var(--color-text); font-weight: 400; }
.nav-links { display: flex; gap: 2rem; align-items: center; list-style: none; }
.nav-links a {
    color: var(--color-text-muted); text-decoration: none;
    font-family: var(--font-ui); font-size: 0.85rem; font-weight: 500;
    transition: color 0.3s ease;
}
.nav-links a:hover { color: var(--color-text); }
.nav-cta {
    font-family: var(--font-ui); padding: 0.6rem 1.4rem;
    background: var(--color-amber); color: var(--color-bg); border: none;
    border-radius: 100px; font-size: 0.85rem; font-weight: 700;
    cursor: pointer; letter-spacing: 0.02em; transition: all 0.3s ease; text-decoration: none;
}
.nav-cta:hover {
    background: var(--color-amber-light); transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(232, 168, 56, 0.3);
}

/* === HERO === */
.hero {
    min-height: 100vh; display: flex; flex-direction: column;
    justify-content: center; align-items: center; text-align: center;
    padding: 6rem 2rem 4rem; position: relative; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 30%, rgba(232, 168, 56, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 20% 80%, rgba(224, 122, 95, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 80% 60%, rgba(129, 168, 141, 0.05) 0%, transparent 60%);
}
.hero-badge {
    font-family: var(--font-ui); display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 1rem; background: var(--color-amber-glow);
    border: 1px solid rgba(232, 168, 56, 0.2); border-radius: 100px;
    font-size: 0.8rem; font-weight: 500; color: var(--color-amber-light);
    margin-bottom: 2.5rem; animation: fadeInUp 0.8s ease both;
}
.hero-badge::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--color-amber); animation: pulse 2s ease infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero h1 {
    font-family: var(--font-display); font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 700; line-height: 1.1; letter-spacing: -0.03em;
    margin-bottom: 1.5rem; animation: fadeInUp 0.8s ease 0.15s both;
}
.hero h1 em { font-style: italic; color: var(--color-amber); }
.hero-sub {
    font-size: clamp(1rem, 2.5vw, 1.2rem); color: var(--color-text-muted);
    font-weight: 300; max-width: 580px; line-height: 1.8;
    margin-bottom: 3rem; animation: fadeInUp 0.8s ease 0.3s both;
}
.hero-actions {
    display: flex; flex-direction: column; align-items: center; gap: 1rem;
    animation: fadeInUp 0.8s ease 0.45s both;
}
.email-form {
    display: flex; gap: 0; background: var(--color-surface);
    border: 1px solid rgba(255,255,255,0.08); border-radius: 100px;
    padding: 0.3rem; width: min(100%, 480px); transition: border-color 0.3s ease;
}
.email-form:focus-within { border-color: rgba(232, 168, 56, 0.4); }
.email-form input {
    flex: 1; background: none; border: none; padding: 0.85rem 1.4rem;
    color: var(--color-text); font-family: var(--font-body); font-size: 0.95rem;
    outline: none; min-width: 0;
}
.email-form input::placeholder { color: var(--color-text-dim); }
.email-form button {
    font-family: var(--font-ui); padding: 0.85rem 1.8rem;
    background: var(--color-amber); color: var(--color-bg); border: none;
    border-radius: 100px; font-size: 0.9rem; font-weight: 700;
    cursor: pointer; white-space: nowrap; transition: all 0.3s ease;
}
.email-form button:hover { background: var(--color-amber-light); }
.hero-email-note { font-size: 0.78rem; color: var(--color-text-dim); }
.hero-scroll {
    position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
    color: var(--color-text-dim); font-size: 0.7rem; font-family: var(--font-ui);
    letter-spacing: 0.15em; text-transform: uppercase;
    animation: fadeInUp 0.8s ease 0.6s both;
}
.hero-scroll-line {
    width: 1px; height: 40px;
    background: linear-gradient(to bottom, var(--color-amber), transparent);
    animation: scrollLine 2s ease infinite;
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === USE CASES CAROUSEL === */
.usecases { padding: 5rem 0; overflow: hidden; }
.usecases-inner { max-width: 1100px; margin: 0 auto; padding: 0 2rem; margin-bottom: 2.5rem; }
.usecases-track {
    display: flex; gap: 1.5rem;
    animation: scrollCards 35s linear infinite; width: max-content;
}
@keyframes scrollCards {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.usecases-track:hover { animation-play-state: paused; }
.usecase-card {
    flex-shrink: 0; width: 240px; border-radius: 20px; overflow: hidden;
    border: 1px solid rgba(255,255,255,0.06); background: var(--color-surface);
    transition: all 0.3s ease;
}
.usecase-card:hover { transform: translateY(-4px); border-color: rgba(232, 168, 56, 0.15); }
.usecase-thumb {
    height: 130px; position: relative; display: flex;
    align-items: center; justify-content: center; font-size: 2.8rem;
}
.usecase-thumb.travel { background: linear-gradient(135deg, #1a2a3a, #0f1925); }
.usecase-thumb.baby { background: linear-gradient(135deg, #2a1a2a, #1a0f1a); }
.usecase-thumb.pet { background: linear-gradient(135deg, #1a2a1a, #0f1a0f); }
.usecase-thumb.wedding { background: linear-gradient(135deg, #2a2a1a, #1a1a0f); }
.usecase-thumb.daily { background: linear-gradient(135deg, #1a1a2a, #0f0f1a); }
.usecase-thumb.food { background: linear-gradient(135deg, #2a1a0f, #1a0f05); }
.usecase-thumb.friends { background: linear-gradient(135deg, #0f2a2a, #051a1a); }
.usecase-thumb.event { background: linear-gradient(135deg, #2a200f, #1a1505); }
.usecase-info { padding: 1rem 1.1rem; }
.usecase-title { font-family: var(--font-ui); font-size: 0.92rem; font-weight: 600; margin-bottom: 0.25rem; }
.usecase-desc { font-size: 0.75rem; color: var(--color-text-muted); line-height: 1.5; font-weight: 300; }


/* === PHONE MOCKUP === */
.demo-section {
    padding: 4rem 2rem 6rem; display: flex; justify-content: center;
    align-items: center; gap: 4rem; max-width: 1100px; margin: 0 auto;
}
.demo-text { flex: 1; max-width: 440px; }
.demo-text .section-label { margin-bottom: 1rem; }
.demo-text .section-title { margin-bottom: 1.2rem; }
.demo-text p {
    color: var(--color-text-muted); font-weight: 300; line-height: 1.7;
    font-size: 1rem; margin-bottom: 2rem;
}
.demo-features { display: flex; flex-direction: column; gap: 1rem; }
.demo-feature { display: flex; align-items: flex-start; gap: 0.75rem; }
.demo-feature-icon {
    width: 36px; height: 36px; border-radius: 10px;
    background: rgba(232, 168, 56, 0.1); display: flex;
    align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0;
}
.demo-feature-text { font-size: 0.88rem; color: var(--color-text-muted); line-height: 1.5; }
.demo-feature-text strong { color: var(--color-text); font-weight: 600; display: block; margin-bottom: 0.15rem; }

.phone-mockup {
    width: 280px; height: 580px; background: var(--color-surface-warm);
    border-radius: 36px; border: 2px solid rgba(255,255,255,0.08);
    position: relative; overflow: hidden; flex-shrink: 0;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03),
        inset 0 1px 0 rgba(255,255,255,0.05);
}
.phone-notch {
    position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: 120px; height: 28px; background: var(--color-bg);
    border-radius: 0 0 18px 18px; z-index: 2;
}
.phone-screen {
    position: absolute; inset: 8px; border-radius: 30px; overflow: hidden;
    background: linear-gradient(160deg, #1a1510, #0f1419);
}
.phone-content { padding: 44px 18px 20px; height: 100%; display: flex; flex-direction: column; overflow: hidden; }
.phone-header { font-family: var(--font-display); font-size: 1.1rem; color: var(--color-amber); margin-bottom: 0.4rem; }
.phone-header-sub { font-size: 0.6rem; color: var(--color-text-dim); margin-bottom: 1rem; }
.phone-story-card {
    background: linear-gradient(135deg, rgba(232, 168, 56, 0.1), rgba(224, 122, 95, 0.06));
    border: 1px solid rgba(232, 168, 56, 0.12); border-radius: 14px;
    padding: 0.85rem; margin-bottom: 0.65rem;
}
.phone-thumb {
    width: 100%; height: 85px; border-radius: 10px; margin-bottom: 0.5rem;
    position: relative; overflow: hidden;
}
.phone-thumb-1 { background: linear-gradient(135deg, #2a3a4a, #1a2a3a); }
.phone-thumb-2 { background: linear-gradient(135deg, #3a2a3a, #2a1a2a); }
.phone-thumb-3 { background: linear-gradient(135deg, #2a3a2a, #1a2a1a); }
.phone-thumb-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.phone-play-btn {
    width: 30px; height: 30px; border-radius: 50%;
    background: rgba(232, 168, 56, 0.9); display: flex;
    align-items: center; justify-content: center;
}
.phone-play-btn::after {
    content: ''; width: 0; height: 0;
    border-left: 7px solid var(--color-bg);
    border-top: 4.5px solid transparent;
    border-bottom: 4.5px solid transparent; margin-left: 2px;
}
.phone-thumb-label { position: absolute; bottom: 6px; left: 8px; font-size: 0.55rem; color: rgba(255,255,255,0.85); font-weight: 500; }
.phone-thumb-duration { position: absolute; bottom: 6px; right: 8px; font-size: 0.48rem; color: rgba(255,255,255,0.6); background: rgba(0,0,0,0.5); padding: 2px 5px; border-radius: 4px; }
.phone-story-title { font-family: var(--font-display); font-size: 0.78rem; margin-bottom: 0.25rem; }
.phone-story-meta { font-size: 0.55rem; color: var(--color-text-muted); }

/* === SECTIONS (shared) === */
.section { padding: 6rem 2rem; max-width: 1100px; margin: 0 auto; }
.section-label {
    font-family: var(--font-ui); font-size: 0.75rem; font-weight: 700;
    letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-amber);
    margin-bottom: 1rem;
}
.section-label.relative { position: relative; }
.section-desc {
    font-size: 1.05rem; color: var(--color-text-muted); font-weight: 300;
    line-height: 1.7; max-width: 600px; margin-bottom: 4rem;
}
.section-title {
    font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 1rem;
}

/* === STEPS === */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.step-card {
    padding: 2rem; border-radius: 20px; background: var(--color-surface);
    border: 1px solid rgba(255,255,255,0.05); transition: all 0.4s ease;
    position: relative; overflow: hidden;
}
.step-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--color-amber), var(--color-coral));
    opacity: 0; transition: opacity 0.4s ease;
}
.step-card:hover { transform: translateY(-4px); border-color: rgba(232, 168, 56, 0.15); }
.step-card:hover::before { opacity: 1; }
.step-num { font-family: var(--font-display); font-size: 3rem; font-weight: 700; color: rgba(232, 168, 56, 0.15); line-height: 1; margin-bottom: 1rem; }
.step-icon { font-size: 2rem; margin-bottom: 1rem; }
.step-title { font-family: var(--font-ui); font-size: 1.1rem; font-weight: 700; margin-bottom: 0.75rem; }
.step-desc { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.6; font-weight: 300; }

/* === FEATURES === */
.features-section {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, transparent, var(--color-bg-warm) 20%, var(--color-bg-warm) 80%, transparent);
}
.features-inner { max-width: 1100px; margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.feature-card {
    padding: 2rem; border-radius: 16px; border: 1px solid rgba(255,255,255,0.05);
    background: rgba(255,255,255,0.02); transition: all 0.3s ease;
}
.feature-card:hover { background: rgba(255,255,255,0.04); border-color: rgba(232, 168, 56, 0.12); }
.feature-icon {
    width: 44px; height: 44px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; margin-bottom: 1.2rem;
}
.feature-icon.amber { background: rgba(232, 168, 56, 0.12); }
.feature-icon.coral { background: rgba(224, 122, 95, 0.12); }
.feature-icon.sage { background: rgba(129, 168, 141, 0.12); }
.feature-icon.sky { background: rgba(107, 158, 207, 0.12); }
.feature-title { font-family: var(--font-ui); font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.feature-desc { font-size: 0.88rem; color: var(--color-text-muted); line-height: 1.6; font-weight: 300; }

/* === SHOWCASE === */
.showcase-section { padding: 6rem 2rem; max-width: 1100px; margin: 0 auto; }
.showcase-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.showcase-card {
    border-radius: 16px; overflow: hidden; border: 1px solid rgba(255,255,255,0.06);
    background: var(--color-surface); transition: all 0.4s ease; cursor: pointer;
}
.showcase-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.4); }
.showcase-thumb { height: 190px; position: relative; overflow: hidden; }
.showcase-thumb-bg { position: absolute; inset: 0; }
.showcase-thumb-bg.tokyo { background: linear-gradient(135deg, #e83e8c22, #6f42c133, #1a1a2e); }
.showcase-thumb-bg.baby { background: linear-gradient(135deg, #e07a5f22, #f2c96d22, #1a1510); }
.showcase-thumb-bg.pet { background: linear-gradient(135deg, #81a88d33, #6b9ecf22, #0f1a18); }
.showcase-thumb-emoji {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%); font-size: 3rem; opacity: 0.5;
}
.showcase-thumb-text {
    position: absolute; bottom: 0; left: 0; right: 0; padding: 3rem 1.2rem 1rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
}
.showcase-thumb-category {
    font-family: var(--font-ui); font-size: 0.6rem; font-weight: 700;
    letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-amber); margin-bottom: 0.3rem;
}
.showcase-thumb-location { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; }
.showcase-thumb-play {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 50px; height: 50px; border-radius: 50%;
    background: rgba(232, 168, 56, 0.9); display: flex;
    align-items: center; justify-content: center;
    opacity: 0; transition: all 0.3s ease;
}
.showcase-card:hover .showcase-thumb-play { opacity: 1; }
.showcase-card:hover .showcase-thumb-emoji { opacity: 0; }
.showcase-thumb-play::after {
    content: ''; width: 0; height: 0;
    border-left: 13px solid var(--color-bg);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent; margin-left: 3px;
}
.showcase-info { padding: 1.2rem; }
.showcase-title { font-family: var(--font-ui); font-size: 0.9rem; font-weight: 600; margin-bottom: 0.3rem; }
.showcase-meta { font-size: 0.75rem; color: var(--color-text-dim); }
.showcase-tags { display: flex; gap: 0.4rem; margin-top: 0.75rem; flex-wrap: wrap; }
.showcase-tag {
    font-family: var(--font-ui); font-size: 0.65rem; padding: 0.25rem 0.6rem;
    border-radius: 100px; background: rgba(232, 168, 56, 0.1);
    color: var(--color-amber-light); font-weight: 500;
}

/* === CTA === */
.cta-section { padding: 8rem 2rem; text-align: center; position: relative; overflow: hidden; }
.cta-bg {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(232, 168, 56, 0.06) 0%, transparent 70%);
}
.cta-section .section-title { max-width: 600px; margin: 0 auto 1rem; position: relative; }
.cta-section .section-desc { margin: 0 auto 3rem; text-align: center; position: relative; }
.cta-form-wrapper { position: relative; }
.cta-form {
    display: flex; gap: 0; background: var(--color-surface);
    border: 1px solid rgba(255,255,255,0.08); border-radius: 100px;
    padding: 0.3rem; width: min(100%, 500px); margin: 0 auto 1.5rem;
    transition: border-color 0.3s ease;
}
.cta-form:focus-within { border-color: rgba(232, 168, 56, 0.4); }
.cta-form input {
    flex: 1; background: none; border: none; padding: 0.85rem 1.4rem;
    color: var(--color-text); font-family: var(--font-body); font-size: 0.95rem;
    outline: none; min-width: 0;
}
.cta-form input::placeholder { color: var(--color-text-dim); }
.cta-form button {
    font-family: var(--font-ui); padding: 0.85rem 2rem;
    background: var(--color-amber); color: var(--color-bg); border: none;
    border-radius: 100px; font-size: 0.9rem; font-weight: 700;
    cursor: pointer; white-space: nowrap; transition: all 0.3s ease;
}
.cta-form button:hover { background: var(--color-amber-light); }
.store-badges { display: flex; justify-content: center; align-items: center; gap: 0.75rem; margin-top: 2rem; position: relative; }
.store-badges a { display: inline-flex; transition: opacity 0.3s ease; }
.store-badges a:hover { opacity: 0.8; }
.store-badges img { height: 40px; display: block; }
.store-badges a:last-child img { height: 52px; }

/* === FOOTER === */
footer {
    padding: 3rem 2rem; border-top: 1px solid rgba(255,255,255,0.05);
    max-width: 1100px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
}
.footer-logo { font-family: var(--font-display); font-size: 1.2rem; color: var(--color-amber); font-weight: 700; }
.footer-links { display: flex; gap: 2rem; list-style: none; }
.footer-links a {
    color: var(--color-text-dim); text-decoration: none;
    font-family: var(--font-ui); font-size: 0.8rem; transition: color 0.3s ease;
}
.footer-links a:hover { color: var(--color-text-muted); }
.footer-copy { font-size: 0.75rem; color: var(--color-text-dim); }

/* === TOAST === */
.toast {
    position: fixed; bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-sage); color: var(--color-bg);
    padding: 1rem 2rem; border-radius: 12px;
    font-family: var(--font-ui); font-size: 0.9rem; font-weight: 600;
    z-index: 1000; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* === REVEAL ANIMATION === */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .demo-section { flex-direction: column-reverse; gap: 3rem; padding: 3rem 2rem; }
    .demo-text { max-width: 100%; }
    .phone-mockup { width: 240px; height: 500px; }
    .steps-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .showcase-grid { grid-template-columns: 1fr; }
    .email-form, .cta-form { flex-direction: column; border-radius: 16px; padding: 0.5rem; }
    .email-form button, .cta-form button { width: 100%; }
    footer { flex-direction: column; gap: 1.5rem; text-align: center; }
    .store-badges { flex-direction: column; align-items: center; }
}