/* 최신 디자인 트렌드를 반영한 Premium CSS */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #f97316;
    --accent-hover: #ea580c;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', sans-serif;
    -webkit-font-smoothing: antialiased;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-white);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.highlight {
    color: var(--accent);
    position: relative;
    display: inline-block;
}

/* Header */
header {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
}

.logo img {
    height: 36px;
    width: 36px;
    border-radius: 10px;
}

/* Buttons */
.cta-button {
    background: var(--accent);
    color: white;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 15px -3px rgba(249, 115, 22, 0.3);
}

.cta-button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(249, 115, 22, 0.4);
}

.cta-button.secondary {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow-md);
    border: 1px solid #e2e8f0;
}

.cta-button.secondary:hover {
    background: #f1f5f9;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, var(--bg-white), transparent);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.25rem;
    color: #94a3b8;
    max-width: 700px;
    margin: 0 auto 40px;
}

/* Section Common */
section {
    padding: 100px 0;
}

.section-tag {
    display: inline-block;
    color: var(--accent);
    background: rgba(249, 115, 22, 0.1);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 60px;
}

/* Intro Section */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-image {
    position: relative;
}

.intro-image img {
    width: 100%;
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
}

.intro-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100px;
    height: 100px;
    background: radial-gradient(var(--accent) 2px, transparent 0);
    background-size: 10px 10px;
    z-index: -1;
}

/* Step Cards */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    border: 1px solid #f1f5f9;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(249, 115, 22, 0.3);
}

.step-icon {
    font-size: 2.5rem;
    margin-bottom: 24px;
    display: block;
}

.step-card h4 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.step-card p {
    color: var(--text-muted);
}

/* Principles */
.principles {
    background: #f8fafc;
    border-radius: 40px;
    margin: 0 24px;
    padding: 80px 40px;
}

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

.principle-item {
    text-align: left;
}

.principle-icon {
    width: 56px;
    height: 56px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

/* Footer */
footer {
    background: var(--primary);
    color: white;
    padding: 100px 0 40px;
    text-align: center;
}

footer h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
}

.footer-bottom {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: #64748b;
}

/* Responsive */
@media (max-width: 968px) {
    .intro-grid, .steps-grid, .principles-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 { font-size: 2.8rem; }
    .intro-grid { gap: 40px; }
}