/* ===================================================================
   Private 경매 구독 - Design System
   gathering-house.kr | GitHub Pages
   =================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Noto+Sans+KR:wght@300;400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
    /* Colors - Deep Blue / Purple Gradient System */
    --bg-primary: #070b14;
    --bg-secondary: #0c1220;
    --bg-card: rgba(15, 23, 42, 0.65);
    --bg-card-hover: rgba(20, 30, 55, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.03);

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(99, 102, 241, 0.4);

    --blue-500: #3b82f6;
    --blue-400: #60a5fa;
    --blue-300: #93c5fd;
    --indigo-500: #6366f1;
    --indigo-400: #818cf8;
    --purple-500: #a855f7;
    --purple-400: #c084fc;
    --cyan-400: #22d3ee;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --amber-400: #fbbf24;
    --red-400: #f87171;

    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #a855f7 100%);
    --gradient-text: linear-gradient(135deg, #60a5fa 0%, #818cf8 50%, #c084fc 100%);
    --gradient-card: linear-gradient(145deg, rgba(59, 130, 246, 0.08) 0%, rgba(99, 102, 241, 0.04) 100%);
    --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.06), transparent 40%);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --glow-blue: 0 0 40px rgba(59, 130, 246, 0.15);
    --glow-indigo: 0 0 60px rgba(99, 102, 241, 0.12);
    --glow-card: 0 4px 30px rgba(0, 0, 0, 0.3);

    /* Typography */
    --font-heading: 'Outfit', 'Noto Sans KR', system-ui, sans-serif;
    --font-body: 'Noto Sans KR', 'Outfit', system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-gap: 8rem;
    --container-max: 1200px;
    --nav-height: 72px;

    /* Animation */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- 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: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Background effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 10% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 90% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(7, 11, 20, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 100;
    transition: all 0.3s ease;
}

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: white;
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

.nav-logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: width 0.3s var(--ease-out-expo);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    background: var(--gradient-primary);
    color: white !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.nav-cta::after {
    display: none !important;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--indigo-400);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s var(--ease-out-expo) both;
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green-400);
    animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.1s both;
}

.hero h1 .gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.3s both;
}

/* Floating particles behind hero */
.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-particles .particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--indigo-400);
    opacity: 0.2;
    animation: float 8s ease-in-out infinite;
}

.hero-particles .particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 7s; }
.hero-particles .particle:nth-child(2) { left: 80%; top: 30%; animation-delay: 1s; animation-duration: 9s; }
.hero-particles .particle:nth-child(3) { left: 30%; top: 70%; animation-delay: 2s; animation-duration: 6s; }
.hero-particles .particle:nth-child(4) { left: 70%; top: 60%; animation-delay: 3s; animation-duration: 8s; }
.hero-particles .particle:nth-child(5) { left: 50%; top: 40%; animation-delay: 1.5s; animation-duration: 10s; }
.hero-particles .particle:nth-child(6) { left: 20%; top: 50%; animation-delay: 0.5s; animation-duration: 11s; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    border-radius: 12px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.25s var(--ease-out-expo);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.55rem 1.2rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

/* --- Section --- */
.section {
    padding: var(--section-gap) 0;
    position: relative;
    z-index: 1;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--indigo-400);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
    line-height: 1.75;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header .section-desc {
    margin: 0.5rem auto 0;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.35s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--glow-indigo);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--gradient-card);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* --- Feature Grid --- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* --- Pipeline / How it works --- */
.pipeline-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    position: relative;
}

.pipeline-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--indigo-500), var(--purple-500), transparent);
    opacity: 0.2;
}

.pipeline-step {
    text-align: center;
    position: relative;
}

.pipeline-step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--indigo-400);
    position: relative;
    z-index: 2;
}

.pipeline-step-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.pipeline-step-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Stats Bar --- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 3rem;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
}

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

.stat-value {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 0.35rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 500;
}

/* --- Report List --- */
.report-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.report-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s var(--ease-out-expo);
}

.report-item:hover {
    border-color: var(--border-accent);
    transform: translateX(6px);
    box-shadow: var(--glow-indigo);
}

.report-date {
    min-width: 80px;
    text-align: center;
}

.report-date-day {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--indigo-400);
    line-height: 1;
}

.report-date-month {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.report-info {
    flex: 1;
}

.report-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.report-meta {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.report-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 700;
}

.report-badge.pass {
    background: rgba(34, 197, 94, 0.12);
    color: var(--green-400);
    border: 1px solid rgba(34, 197, 94, 0.25);
}

.report-arrow {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: transform 0.2s ease;
}

.report-item:hover .report-arrow {
    transform: translateX(4px);
    color: var(--indigo-400);
}

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    padding: 6rem 2rem;
    background: var(--gradient-card);
    border: 1px solid var(--border-subtle);
    border-radius: 28px;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.06) 0%, transparent 50%);
    animation: rotate 20s linear infinite;
}

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

.cta-section .section-desc {
    position: relative;
    z-index: 1;
    margin: 0.5rem auto 2rem;
}

.cta-section .hero-actions {
    position: relative;
    z-index: 1;
}

/* --- Footer --- */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--indigo-400);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-20px) translateX(10px); }
    50% { transform: translateY(-10px) translateX(-10px); }
    75% { transform: translateY(-25px) translateX(5px); }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- Track Record Verification Section --- */
.track-record-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: 16px;
    padding: 1.75rem;
    margin-bottom: 1.25rem;
    transition: all 0.3s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.track-record-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.track-record-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: var(--glow-card);
}

.track-record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.track-record-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.track-record-case {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--indigo-400);
    background: rgba(99, 102, 241, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

.track-record-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    background: rgba(34, 197, 94, 0.15);
    color: var(--green-400);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.track-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border-subtle);
}

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

.track-col {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.track-col-title {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.track-col.forecast .track-col-title {
    color: var(--blue-400);
}

.track-col.actual .track-col-title {
    color: var(--green-400);
}

.track-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.92rem;
}

.track-label {
    color: var(--text-secondary);
}

.track-val {
    font-weight: 600;
    color: var(--text-primary);
}

.track-val.highlight {
    font-size: 1.05rem;
    color: var(--cyan-400);
    font-weight: 700;
}

.track-val.profit {
    font-size: 1.05rem;
    color: var(--green-400);
    font-weight: 700;
}

.track-report-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--indigo-400);
    text-decoration: none;
    transition: color 0.2s ease;
}

.track-report-link:hover {
    color: var(--cyan-400);
    text-decoration: underline;
}

/* Scroll-triggered animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s var(--ease-out-expo);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pipeline-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .pipeline-steps::before {
        display: none;
    }
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-gap: 5rem;
    }

    .container {
        padding: 0 1.25rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(7, 11, 20, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border-subtle);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

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

    .pipeline-steps {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .stats-bar {
        grid-template-columns: 1fr 1fr;
        padding: 2rem 1.5rem;
        gap: 1.5rem;
    }

    .stat-value {
        font-size: 1.8rem;
    }

    .report-item {
        flex-wrap: wrap;
        gap: 1rem;
        padding: 1.25rem;
    }

    .report-date {
        min-width: unset;
    }

    .cta-section {
        padding: 4rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn {
        justify-content: center;
    }
    .stats-bar {
        grid-template-columns: 1fr;
    }
}