:root {
    --primary-color: #7EC8E3;
    --primary-dark: #5BA4C9;
    --secondary-color: #B8C5E2;
    --accent-mint: #A8E6CF;
    --accent-coral: #F5A895;
    --background-color: #F8FBFF;
    --surface-color: #FFFFFF;
    --surface-muted: #F1F7FB;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C9A;
    --text-muted: #A8B5C4;
    --border-color: #E8F4FA;
    --gradient-start: #7EC8E3;
    --gradient-end: #B8C5E2;
    --display-font: 'Gowun Batang', 'Noto Sans KR', sans-serif;
    --body-font: 'Noto Sans KR', sans-serif;
    --shadow-soft: 0 24px 60px rgba(28, 70, 92, 0.18);
    --shadow-card: 0 16px 36px rgba(32, 76, 99, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 96px 0;
    position: relative;
}

.section-title {
    font-size: 2.6rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-family: var(--display-font);
}

.section-lede {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: absolute;
    top: 24px;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 999px;
    padding: 12px 24px;
    box-shadow: 0 12px 30px rgba(28, 70, 92, 0.12);
    backdrop-filter: blur(10px);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    font-family: var(--display-font);
    letter-spacing: 0.2px;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-dark);
}

/* Hero Section */
.hero {
    background: linear-gradient(180deg, #F8FBFF 0%, #EAF6FB 45%, #DCEEF9 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -140px;
    right: -120px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(126, 200, 227, 0.45) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -180px;
    left: -120px;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(184, 197, 226, 0.35) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 64px;
    align-items: center;
    padding: 160px 0 120px;
}

.hero-copy {
    animation: fadeUp 0.8s ease-out 0.1s both;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(126, 200, 227, 0.18);
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: 3.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    font-family: var(--display-font);
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.1rem;
    max-width: 560px;
    margin-bottom: 32px;
    color: var(--text-primary);
    line-height: 1.8;
}

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

.hero-highlights {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.hero-highlight {
    background: rgba(255, 255, 255, 0.78);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 14px 16px;
}

.highlight-title {
    display: block;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.highlight-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hero-visual {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-end;
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.hero-card {
    width: min(360px, 100%);
    background: var(--surface-color);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
}

.hero-card-mini {
    width: min(320px, 100%);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(248, 251, 255, 0.9));
}

.hero-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.hero-card-title {
    font-weight: 700;
    color: var(--text-primary);
}

.hero-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.hero-chip-muted {
    background: rgba(126, 200, 227, 0.2);
    color: var(--primary-dark);
}

.hero-card-text {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-meter {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.meter-bar {
    width: 100%;
    height: 8px;
    background: var(--surface-muted);
    border-radius: 999px;
    overflow: hidden;
}

.meter-bar span {
    display: block;
    height: 100%;
    width: 72%;
    background: linear-gradient(90deg, var(--accent-mint), var(--primary-color));
}

.hero-card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.hero-card-tags span {
    background: var(--surface-muted);
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 999px;
}

.hero-mini-progress {
    height: 6px;
    border-radius: 999px;
    background: rgba(126, 200, 227, 0.2);
    overflow: hidden;
}

.hero-mini-progress span {
    display: block;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 16px 30px rgba(90, 164, 201, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(90, 164, 201, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.85);
    color: var(--primary-dark);
    border: 1px solid rgba(126, 200, 227, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(90, 164, 201, 0.2);
}

/* Features */
.features {
    background: var(--surface-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.feature-card {
    background: var(--background-color);
    padding: 32px;
    border-radius: 22px;
    border: 1px solid var(--border-color);
    box-shadow: 0 14px 30px rgba(32, 76, 99, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(32, 76, 99, 0.12);
}

.feature-icon {
    font-size: 2.4rem;
    margin-bottom: 18px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Updates */
.updates {
    background: linear-gradient(180deg, #FDFEFF 0%, #F1F7FB 100%);
}

.updates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.update-card {
    background: var(--surface-color);
    border-radius: 20px;
    padding: 28px;
    border: 1px solid var(--border-color);
    box-shadow: 0 14px 28px rgba(32, 76, 99, 0.08);
    animation: fadeUp 0.8s ease-out both;
}

.update-card:nth-child(1) {
    animation-delay: 0.1s;
}

.update-card:nth-child(2) {
    animation-delay: 0.2s;
}

.update-card:nth-child(3) {
    animation-delay: 0.3s;
}

.update-tag {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(126, 200, 227, 0.2);
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.update-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    font-weight: 700;
    color: var(--text-primary);
}

.update-card p {
    color: var(--text-secondary);
}

/* Screenshots */
.screenshots {
    background: var(--background-color);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.screenshot-item {
    background: var(--surface-color);
    border-radius: 24px;
    padding: 18px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    text-align: center;
    animation: fadeUp 0.8s ease-out both;
}

.screenshot-item:nth-child(1) {
    animation-delay: 0.1s;
}

.screenshot-item:nth-child(2) {
    animation-delay: 0.15s;
}

.screenshot-item:nth-child(3) {
    animation-delay: 0.2s;
}

.screenshot-item:nth-child(4) {
    animation-delay: 0.25s;
}

.screenshot-item:nth-child(5) {
    animation-delay: 0.3s;
}

.screenshot-item:nth-child(6) {
    animation-delay: 0.35s;
}

.screenshot-item img {
    width: 100%;
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(32, 76, 99, 0.16);
    transition: transform 0.3s;
}

.screenshot-item img:hover {
    transform: translateY(-4px) scale(1.01);
}

.screenshot-item p {
    margin-top: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Tech Stack */
.tech-stack {
    background: var(--surface-color);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 140px;
    padding: 22px 24px;
    background: var(--background-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.tech-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(32, 76, 99, 0.08);
}

.tech-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    min-height: 32px;
    margin-bottom: 10px;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.tech-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    min-height: 2.8em;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-family: var(--display-font);
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 28px;
    opacity: 0.9;
}

.cta .hero-buttons {
    justify-content: center;
}

/* Footer */
.footer {
    background: #1F2A37;
    color: rgba(255, 255, 255, 0.7);
    padding: 40px 0;
    text-align: center;
}

.footer p {
    margin-bottom: 12px;
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Responsive */
@media (max-width: 960px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 140px 0 100px;
    }

    .hero-visual {
        align-items: center;
    }

    .hero-highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 12px 18px;
    }

    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.6rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 2rem;
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-description br {
        display: none;
    }
}