/* CSS Variables for Dark & Light Mode */
:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --text-muted: #868e96;
    --primary-color: #4c6ef5;
    --secondary-color: #fa5252;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --card-bg: #ffffff;
    --border-color: #e9ecef;
    --accent: #20c997;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --hover-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #f1f3f5;
    --text-muted: #adb5bd;
    --primary-color: #748ffc;
    --secondary-color: #ff8787;
    --nav-bg: rgba(18, 18, 18, 0.85);
    --card-bg: #1e1e1e;
    --border-color: #343a40;
    --accent: #38d9a9;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --hover-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition), color var(--transition);
    line-height: 1.6;
}

/* Header */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    margin: 0 1rem;
    font-weight: 600;
    transition: color var(--transition);
}

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

.actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    border-radius: 8px;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    padding: 0.5rem 1rem;
    font-weight: 600;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    font-weight: 600;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
}

.large {
    padding: 0.8rem 1.5rem;
    font-size: 1.1rem;
}

.btn-icon {
    font-size: 1.2rem;
    background: transparent;
    color: var(--text-color);
}

/* Ad Placeholders */
.ad-placeholder {
    background: var(--card-bg);
    border: 2px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-weight: 600;
    text-align: center;
}

.top-ad,
.bottom-ad {
    width: 100%;
    max-width: 900px;
    height: 90px;
    margin: 2rem auto;
    border-radius: 8px;
}

.side-ad {
    width: 200px;
    height: 600px;
    border-radius: 8px;
    position: sticky;
    top: 100px;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.content-layout {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
}

.main-sections {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 5rem 1rem;
    background: radial-gradient(circle at 50% 50%, rgba(76, 110, 245, 0.1), transparent 70%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--primary-color), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Sections & Cards */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 800;
}

.badge {
    background: var(--secondary-color);
    color: #fff;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 800;
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
    border-color: var(--primary-color);
}

.card-image {
    height: 160px;
    width: 100%;
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.tag {
    background: rgba(76, 110, 245, 0.1);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
}

.footer-links a {
    color: var(--text-muted);
    margin-left: 1rem;
    text-decoration: none;
    transition: color var(--transition);
}

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

@media (max-width: 992px) {
    .content-layout {
        flex-direction: column;
    }

    .side-ad {
        width: 100%;
        height: 90px;
        position: static;
    }
}

/* 디버그 테스트  */