/* Design System V4: "Bubble Glass" (Matched to User Reference) */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');
@import url('https://cdn.jsdelivr.net/gh/webfontworld/gmarket/GmarketSans.css');

:root {
    /* Reference Image Color Palette - Pastel & Neon Mix */
    --orb-cyan: #2de2e6;
    --orb-purple: #9d00ff;
    --orb-pink: #ff3864;
    --orb-yellow: #ffeb3b;
    --bg-base: #f0f2f5;

    /* Glass Vars */
    --glass-bg: rgba(255, 255, 255, 0.65);
    /* More milky */
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --glass-blur: 20px;

    /* Text */
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --primary-accent: #6200ea;
    /* Deep Purple for readable text */

    --card-radius: 30px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Pretendard', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: #f8f9fd;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(45, 226, 230, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 90% 10%, rgba(157, 0, 255, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 30% 80%, rgba(255, 56, 100, 0.25) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(255, 235, 59, 0.3) 0%, transparent 40%);
    background-attachment: fixed;
}

h1,
h2,
h3 {
    font-family: 'GmarketSans', sans-serif;
    font-weight: 700;
    color: #111;
    letter-spacing: -0.03em;
}

h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #111 0%, #444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

/* Header */
.header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1000px;
    z-index: 1000;
    padding: 15px 30px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid white;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.nav-menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.neu-btn {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.neu-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--primary-accent);
}

.neu-button-fill {
    background: #111;
    color: white !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.neu-button-fill:hover {
    background: #333;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    transform: translateY(-2px);
}

/* Layout */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding-top: 140px;
    padding-bottom: 80px;
}

.section+.section {
    padding-top: 0;
}

/* Glass Card */
.neu-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--card-radius);
    padding: 50px;
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.neu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border-color: #fff;
    background: rgba(255, 255, 255, 0.75);
}

.neu-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(120deg, transparent 40%, rgba(255, 255, 255, 0.6) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: 0.6s;
    opacity: 0;
}

.neu-card:hover::after {
    transform: translateX(100%);
    opacity: 1;
}

/* Images */
.content-img {
    width: 100%;
    max-width: 700px;
    border-radius: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    margin: 40px auto;
    display: block;
    border: 8px solid rgba(255, 255, 255, 0.7);
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(145deg, #ffffff, #f5f7fa);
    border-radius: 20px;
    padding: 30px;
    border-left: 6px solid var(--orb-cyan);
    margin-top: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
}

/* Tables */
.data-table-wrapper {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: #f8f9fd;
    padding: 20px;
    color: #555;
    font-weight: 700;
    text-align: left;
}

td {
    padding: 20px;
    border-top: 1px solid #eee;
    color: #333;
}

tr:hover td {
    background: #fdfdfd;
}

/* FAQ */
.faq-item {
    background: white;
    border-radius: 20px;
    margin-bottom: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.5);
    cursor: pointer;
    overflow: hidden;
}

.faq-question {
    padding: 25px;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: #666;
    background: #fafafa;
}

.faq-item.active .faq-answer {
    padding-bottom: 25px;
    max-height: 500px;
}

/* 5-Point Value Strategy Styles */
.value-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 30px;
}

/* Neumorphism + Glass Style */
.value-card {
    background: rgba(255, 255, 255, 0.7);
    /* Slightly more opacity for neumorphism */
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 25px;
    padding: 35px;
    flex: 1 1 300px;
    /* Neumorphic Shadows: Soft Light Top-Left, Soft Dark Bottom-Right */
    box-shadow:
        10px 10px 20px rgba(174, 174, 192, 0.2),
        -10px -10px 20px rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.value-card:hover {
    transform: translateY(-5px);
    background: white;
    /* Deeper shadow on hover */
    box-shadow:
        15px 15px 30px rgba(174, 174, 192, 0.3),
        -15px -15px 30px rgba(255, 255, 255, 0.9);
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--text-secondary);
}

/* Individual Colors for Cards */
.value-card:nth-child(1)::before {
    background: var(--orb-cyan);
}

.value-card:nth-child(2)::before {
    background: var(--orb-purple);
}

.value-card:nth-child(3)::before {
    background: var(--orb-pink);
}

.value-card:nth-child(4)::before {
    background: var(--orb-yellow);
}

.value-card:nth-child(5)::before {
    background: #111;
}

.value-card:nth-child(6)::before {
    background: #00e676;
}

/* Bright Green for Tree */

/* 3D Icon Support */
.value-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    object-fit: contain;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
    /* Soft 3D shadow */
    transition: transform 0.3s ease;
}

.value-card:hover .value-icon {
    transform: scale(1.1) rotate(5deg);
    /* Slight pop on hover */
}

/* Removed old generic background block for icons since we use images now */

.value-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #111;
}

.value-desc {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.6;
}

/* Footer */
footer {
    text-align: center;
    padding: 60px 0;
    color: #999;
    font-size: 0.9rem;
}

/* Utility Animations */
.fade-in {
    animation: fadeIn 1s ease forwards;
    opacity: 0;
}

.slide-up {
    animation: slideUp 0.8s ease 0.2s forwards;
    opacity: 0;
    transform: translateY(30px);
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile */
@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }

    .header {
        width: 95%;
        padding: 12px 20px;
    }

    .nav-menu {
        gap: 5px;
        font-size: 0.8rem;
    }

    .neu-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    .neu-card {
        padding: 30px;
    }

    .value-grid {
        flex-direction: column;
    }
}