/* ===== Gangnam Premium Guide - Shared Stylesheet ===== */

/* 콘텐츠 보호 */
* {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

img {
    -webkit-user-drag: none;
    user-drag: none;
    pointer-events: none;
}

a, button, input, textarea, select {
    pointer-events: auto;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --gold: #D4AF37;
    --gold-light: #F4D03F;
    --gold-dark: #B8960F;
    --black: #000000;
    --black-light: #111111;
    --black-card: #1a1a1a;
    --white: #FFFFFF;
    --ivory: #FFFEF0;
    --gray-dark: #333333;
    --gray-light: #666666;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
    background: linear-gradient(135deg, var(--black) 0%, var(--black-light) 50%, var(--gray-dark) 100%);
    color: var(--white);
    line-height: 1.8;
    font-size: 20px;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: rgba(0, 0, 0, 0.9);
    border-bottom: 2px solid var(--gold);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 999;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 26px;
    font-weight: 900;
    color: var(--gold);
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.5);
    letter-spacing: 2px;
    text-decoration: none;
    display: inline-block;
}

.header-cta {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--black);
    padding: 13px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 17px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
    white-space: nowrap;
}

.header-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.6);
}

/* Main Nav */
.main-nav {
    margin-top: 14px;
    display: flex;
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.main-nav::-webkit-scrollbar {
    display: none;
}

.main-nav a {
    color: var(--ivory);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid rgba(212, 175, 55, 0.35);
    white-space: nowrap;
    transition: all 0.25s ease;
}

.main-nav a:hover {
    color: var(--gold);
    border-color: var(--gold);
    background: rgba(212, 175, 55, 0.08);
}

.main-nav a[aria-current="page"] {
    background: var(--gold);
    color: var(--black);
    border-color: var(--gold);
    font-weight: 800;
}

/* Breadcrumb */
.breadcrumb {
    padding: 22px 0 0;
    font-size: 16px;
    color: var(--gray-light);
}

.breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.breadcrumb li + li::before {
    content: "›";
    margin-right: 6px;
    color: var(--gray-light);
}

.breadcrumb a {
    color: var(--gold);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Hero Section */
.hero {
    padding: 90px 0 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.2); opacity: 0.5; }
}

h1 {
    font-size: 52px;
    font-weight: 900;
    margin-bottom: 30px;
    color: var(--gold);
    text-shadow: 0 0 30px rgba(212, 175, 55, 0.6);
    letter-spacing: -1px;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 23px;
    color: var(--ivory);
    margin-bottom: 50px;
    line-height: 1.6;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.highlight {
    color: var(--gold);
    font-weight: 700;
}

/* Section Images */
.section-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    margin: 40px 0;
    border: 2px solid var(--gold);
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.3);
    transition: transform 0.4s ease;
}

.section-image:hover {
    transform: scale(1.02);
}

/* Card Base */
.card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--gold);
    border-radius: 20px;
    padding: 50px 40px;
    margin: 40px 0;
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(212, 175, 55, 0.2);
    border-color: var(--gold-light);
}

h2 {
    font-size: 40px;
    font-weight: 800;
    color: var(--gold);
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 3px solid var(--gold);
    display: inline-block;
}

h3 {
    font-size: 30px;
    font-weight: 700;
    color: var(--gold-light);
    margin: 40px 0 20px;
}

h4 {
    font-size: 25px;
    font-weight: 600;
    color: var(--ivory);
    margin: 30px 0 15px;
}

p {
    margin-bottom: 25px;
    color: var(--ivory);
    line-height: 1.9;
}

/* Grade Comparison Cards */
.grade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.grade-card {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.95) 0%, rgba(17, 17, 17, 0.95) 100%);
    border: 2px solid var(--gold);
    border-radius: 25px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.grade-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.1), transparent);
    transition: left 0.6s ease;
}

.grade-card:hover::before {
    left: 100%;
}

.grade-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 70px rgba(212, 175, 55, 0.3);
    border-color: var(--gold-light);
}

.grade-badge {
    display: inline-block;
    background: var(--gold);
    color: var(--black);
    font-size: 18px;
    font-weight: 900;
    padding: 10px 25px;
    border-radius: 50px;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.grade-title {
    font-size: 36px;
    font-weight: 900;
    color: var(--gold);
    margin: 20px 0;
}

.grade-price {
    font-size: 26px;
    color: var(--gold-light);
    font-weight: 700;
    margin: 15px 0;
}

.grade-desc {
    color: var(--ivory);
    font-size: 18px;
    line-height: 1.7;
    margin: 20px 0;
}

.grade-link {
    display: inline-block;
    margin-top: 10px;
    color: var(--gold);
    font-weight: 700;
    text-decoration: underline;
    font-size: 18px;
}

.grade-link:hover {
    color: var(--gold-light);
}

/* Price CTA Box */
.price-cta-box {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.2) 0%, rgba(212, 175, 55, 0.1) 100%);
    border: 2px solid var(--gold);
    border-radius: 20px;
    padding: 40px;
    margin: 40px 0;
    text-align: center;
}

.price-cta-box h3 {
    font-size: 34px;
    color: var(--gold);
    margin: 0 0 20px;
}

.price-cta-box p {
    font-size: 22px;
    color: var(--ivory);
    margin-bottom: 25px;
}

.tel-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--black);
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 22px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.tel-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(212, 175, 55, 0.6);
}

/* Lists */
ul, ol {
    margin: 25px 0 25px 30px;
    color: var(--ivory);
}

li {
    margin-bottom: 15px;
    line-height: 1.8;
}

li strong {
    color: var(--gold);
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
    background: rgba(26, 26, 26, 0.6);
    border-radius: 15px;
    overflow: hidden;
}

th {
    background: var(--gold);
    color: var(--black);
    padding: 20px;
    font-weight: 700;
    font-size: 20px;
    text-align: left;
}

td {
    padding: 20px;
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    color: var(--ivory);
}

tr:hover {
    background: rgba(212, 175, 55, 0.1);
}

/* CTA */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--black);
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 22px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
    margin: 20px 10px;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(212, 175, 55, 0.6);
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 100%);
}

.cta-box {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(212, 175, 55, 0.05) 100%);
    border-radius: 25px;
    border: 2px solid var(--gold);
    margin: 60px 0;
}

.cta-box h3 {
    font-size: 36px;
    margin: 0 0 20px;
    color: var(--gold);
}

.cta-box p {
    font-size: 22px;
    margin-bottom: 30px;
    color: var(--ivory);
}

/* Mobile Fixed CTA */
.mobile-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--black);
    padding: 20px;
    text-align: center;
    font-weight: 800;
    font-size: 20px;
    text-decoration: none;
    z-index: 1000;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
}

/* FAQ */
.faq-item {
    background: rgba(26, 26, 26, 0.6);
    border-left: 4px solid var(--gold);
    padding: 30px;
    margin: 25px 0;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(26, 26, 26, 0.9);
    transform: translateX(10px);
}

.faq-question {
    font-size: 24px;
    font-weight: 700;
    color: var(--gold);
    margin-bottom: 15px;
}

.faq-answer {
    color: var(--ivory);
    line-height: 1.8;
}

/* Related Guides */
.related-guides {
    margin: 60px 0;
}

.related-guides h2 {
    font-size: 34px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.related-card {
    display: block;
    background: rgba(26, 26, 26, 0.85);
    border: 1px solid rgba(212, 175, 55, 0.5);
    border-radius: 18px;
    padding: 30px 25px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.related-card:hover {
    border-color: var(--gold-light);
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.2);
}

.related-card strong {
    display: block;
    color: var(--gold);
    font-size: 22px;
    margin-bottom: 10px;
}

.related-card span {
    color: var(--ivory);
    font-size: 17px;
    line-height: 1.6;
}

/* Internal Links */
.internal-link {
    color: var(--gold);
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.3s ease;
}

.internal-link:hover {
    color: var(--gold-light);
}

/* Footer */
footer {
    background: var(--black);
    border-top: 2px solid var(--gold);
    padding: 60px 0 30px;
    margin-top: 100px;
    text-align: center;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 25px;
    margin-bottom: 30px;
}

.footer-nav a {
    color: var(--ivory);
    text-decoration: none;
    font-size: 17px;
}

.footer-nav a:hover {
    color: var(--gold);
    text-decoration: underline;
}

footer p {
    color: var(--gray-light);
    font-size: 16px;
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        font-size: 17px;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 30px;
    }

    h3 {
        font-size: 25px;
    }

    .hero {
        padding: 60px 0 40px;
    }

    .hero-subtitle {
        font-size: 19px;
    }

    .card {
        padding: 35px 25px;
    }

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

    .cta-button {
        font-size: 19px;
        padding: 18px 40px;
    }

    .mobile-cta {
        display: block;
    }

    .header-cta {
        display: none;
    }

    table {
        font-size: 15px;
    }

    th, td {
        padding: 12px;
    }
}