/*
Theme Name: Flavor Starter
Theme URI: https://binanceself.vsquaremall.co.kr
Author: VSquare Mall
Description: 바이낸스 셀퍼럴 테더맥스 랜딩 페이지 - Poppins, 다크모드, 사이드 드로어
Version: 1.0.0
Text Domain: flavor-starter
*/

/* Poppins Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* CSS Variables - Dark Theme with Orange Accent */
:root {
    --primary-color: #F59E0B;
    --primary-dark: #D97706;
    --primary-light: #FBBF24;
    --accent-color: #F59E0B;
    --text-primary: #FFFFFF;
    --text-secondary: #E5E7EB;
    --text-muted: #9CA3AF;
    --bg-primary: #0A0A0F;
    --bg-secondary: #111118;
    --bg-tertiary: #1A1A24;
    --bg-card: #16161E;
    --border-color: rgba(245, 158, 11, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --gradient-primary: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    --gradient-accent: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);
    --shadow-glow: 0 0 40px rgba(245, 158, 11, 0.25);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(245, 158, 11, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

/* Grid Background */
.grid-background {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(245, 158, 11, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245, 158, 11, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
}

/* Floating Orbs */
.floating-bubble {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    filter: blur(80px);
}

.bubble-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    top: -15%;
    right: -15%;
    animation: orb-float 30s ease-in-out infinite;
}

.bubble-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(217, 119, 6, 0.12) 0%, transparent 70%);
    bottom: 10%;
    left: -10%;
    animation: orb-float 35s ease-in-out infinite reverse;
}

.bubble-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.08) 0%, transparent 70%);
    top: 50%;
    left: 40%;
    animation: orb-float 25s ease-in-out infinite;
}

@keyframes orb-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.1); }
    50% { transform: translate(-40px, 40px) scale(0.9); }
    75% { transform: translate(30px, 30px) scale(1.05); }
}

/* Side Drawer Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    background: transparent;
    transition: all 0.3s ease;
}

.site-header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hamburger Menu Button */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
    gap: 6px;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Side Drawer */
.side-drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--glass-border);
    z-index: 999;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 100px 2rem 2rem;
    overflow-y: auto;
}

.side-drawer.open {
    right: 0;
}

.side-drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    z-index: 998;
    transition: all 0.3s ease;
}

.side-drawer-overlay.active {
    opacity: 1;
    visibility: visible;
}

.side-drawer nav ul {
    list-style: none;
    padding: 0;
}

.side-drawer nav li {
    margin-bottom: 1rem;
}

.side-drawer nav a {
    display: block;
    padding: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1.1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.side-drawer nav a:hover {
    background: var(--glass-bg);
    color: var(--primary-color);
}

.drawer-cta {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.drawer-cta a {
    display: block;
    text-align: center;
    padding: 1rem;
    background: var(--gradient-primary);
    color: var(--bg-primary);
    font-weight: 600;
    border-radius: var(--radius-md);
}

/* Header CTA - Underline Style */
.header-cta {
    color: var(--primary-color);
    font-weight: 600;
    position: relative;
    padding-bottom: 2px;
}

.header-cta::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.header-cta:hover::after {
    width: 100%;
}

/* Main Content */
.site-main {
    position: relative;
    z-index: 1;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 2rem 4rem;
}

.hero-content {
    max-width: 900px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: stagger-fade 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    font-weight: 600;
    animation: stagger-fade 0.8s ease-out 0.1s both;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    animation: stagger-fade 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: stagger-fade 0.8s ease-out 0.3s both;
}

/* Stagger Animation */
@keyframes stagger-fade {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Button Styles - Underline Text */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    position: relative;
}

.btn-secondary::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 2rem;
    right: 2rem;
    height: 2px;
    background: var(--gradient-primary);
    transition: transform 0.3s ease;
    transform: scaleX(0.5);
}

.btn-secondary:hover::after {
    transform: scaleX(1);
}

/* Section Styles */
section {
    padding: 100px 2rem;
    position: relative;
}

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

.section-title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

/* Flat Cards with Hover Shadow */
.feature-card, .step-card, .benefit-card, .testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.4s ease;
    box-shadow: var(--shadow-card);
}

.feature-card:hover, .step-card:hover, .benefit-card:hover, .testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(245, 158, 11, 0.3);
}

/* 3-Column Layout */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

/* Feature Card */
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Step Card */
.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.step-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Benefit Card */
.benefit-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.benefit-stat {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.1rem;
}

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

/* Trust Section */
.trust-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.trust-item {
    padding: 2rem;
}

.trust-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.trust-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Testimonial Card */
.testimonial-rating {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.testimonial-content {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

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

.testimonial-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.testimonial-info h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.testimonial-info span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* FAQ Section */
.faq-section {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(245, 158, 11, 0.3);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-weight: 600;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--bg-primary);
    margin-bottom: 1rem;
}

.cta-subtitle {
    color: rgba(10, 10, 15, 0.8);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.btn-white {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    background: var(--bg-primary);
    color: var(--primary-color);
    font-weight: 700;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Footer */
.site-footer {
    background: var(--bg-secondary);
    padding: 3rem 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid,
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid,
    .steps-grid,
    .benefits-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-section {
        padding-top: 100px;
    }

    section {
        padding: 60px 1.5rem;
    }

    .header-cta {
        display: none;
    }
}

/* Stagger Animation for Grid Items */
.stagger-item {
    opacity: 0;
    transform: translateY(30px);
    animation: stagger-fade 0.6s ease-out forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.1s; }
.stagger-item:nth-child(2) { animation-delay: 0.2s; }
.stagger-item:nth-child(3) { animation-delay: 0.3s; }
.stagger-item:nth-child(4) { animation-delay: 0.4s; }
.stagger-item:nth-child(5) { animation-delay: 0.5s; }
.stagger-item:nth-child(6) { animation-delay: 0.6s; }

/* Blog Styles */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s ease;
}

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

.blog-card-content {
    padding: 1.5rem;
}

.blog-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.blog-card h3 a {
    color: var(--text-primary);
}

.blog-card h3 a:hover {
    color: var(--primary-color);
}

.blog-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    display: inline-block;
}

.read-more::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.read-more:hover::after {
    width: 100%;
}

/* Page Styles */
.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-content {
    color: var(--text-secondary);
    line-height: 1.9;
}

.page-content h2 {
    color: var(--primary-color);
    margin: 2.5rem 0 1rem;
}

.page-content h3 {
    color: var(--text-primary);
    margin: 2rem 0 0.75rem;
}

.page-content p {
    margin-bottom: 1.5rem;
}

.page-content ul, .page-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

/* Single Post */
.single-post-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.single-post-header {
    text-align: center;
    margin-bottom: 3rem;
}

.single-post-content {
    color: var(--text-secondary);
    line-height: 1.9;
}

.single-post-content h2 {
    color: var(--text-primary);
    margin: 2rem 0 1rem;
}

.single-post-content p {
    margin-bottom: 1.5rem;
}

.single-post-content ul, .single-post-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.single-post-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .floating-bubble,
    .stagger-item,
    .hero-title,
    .hero-subtitle,
    .hero-description {
        animation: none;
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}