:root {
    --primary-color: #ff0663;
    --primary-dark: #c80050;
    --text-color: #1d1d1f;
    --text-secondary: #86868b;
    --bg-color: #ffffff;
    --bg-secondary: #f5f5f7;
    --header-bg: rgba(255, 255, 255, 0.8);
    --border-color: rgba(0, 0, 0, 0.05);
    --card-bg: #ffffff;
    --card-shadow: rgba(0, 0, 0, 0.05);
    --btn-hover-bg: rgba(0, 0, 0, 0.05);
    --mockup-bg: #E6E6E6;
    --border-radius: 12px;
    --container-width: 980px;
    --font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="dark"] {
    --text-color: #f5f5f7;
    --text-secondary: #a1a1a6;
    --bg-color: #000000;
    --bg-secondary: #1c1c1e;
    --header-bg: rgba(0, 0, 0, 0.8);
    --border-color: rgba(255, 255, 255, 0.1);
    --card-bg: #1c1c1e;
    --card-shadow: rgba(0, 0, 0, 0.2);
    --btn-hover-bg: rgba(255, 255, 255, 0.1);
    --mockup-bg: #191919;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --text-color: #f5f5f7;
        --text-secondary: #a1a1a6;
        --bg-color: #000000;
        --bg-secondary: #1c1c1e;
        --header-bg: rgba(0, 0, 0, 0.8);
        --border-color: rgba(255, 255, 255, 0.1);
        --card-bg: #1c1c1e;
        --card-shadow: rgba(0, 0, 0, 0.2);
        --btn-hover-bg: rgba(255, 255, 255, 0.1);
    }
}

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

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    background-color: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    background-color: #191919;
    color: white;
    padding: 8px 12px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.logo span {
    background-image: linear-gradient(to right, #FF004F, #FE0075);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-color);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 8px 12px;
    margin-right: 8px;
}

.btn-text:hover {
    background-color: var(--btn-hover-bg);
}

.btn-primary {
    background: linear-gradient(to right, #FF004F, #FE0075);
    color: white;
    border: none;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 0, 79, 0.3);
}

.btn-large {
    padding: 12px 24px;
    font-size: 1rem;
}

.btn-white {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-white:hover {
    background-color: var(--bg-secondary);
}

/* Hero Section */
.hero {
    padding: 100px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-image {
    margin-top: 60px;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background-color: var(--mockup-bg);
    border-radius: 40px;
    border: 8px solid #1d1d1f;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-image {
    height: 100%;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
    width: 80px;
    height: 80px;
    line-height: 80px;
    background-color: var(--bg-secondary);
    border-radius: 24px;
}

.feature-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Reviews Section */
.reviews {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.reviews h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.review-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 4px 12px var(--card-shadow);
}

.stars {
    color: #FFD700;
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.review-text {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 20px;
    font-style: italic;
}

.review-author {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Footer */
.site-footer {
    padding: 40px 0;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    margin-left: 20px;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .feature-grid,
    .review-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
    }

    .footer-links a {
        margin: 0 10px;
    }
}