/* ===== CSS Variables ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --accent: #f59e0b;
    --background: #0f0f1a;
    --surface: #1a1a2e;
    --surface-light: #252542;
    --text: #ffffff;
    --text-secondary: #a1a1aa;
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-2: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 100%);
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --radius: 16px;
    --radius-sm: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 40px 24px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(236, 72, 153, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 100%, rgba(245, 158, 11, 0.2) 0%, transparent 50%);
    z-index: -1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-title .highlight {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    background: var(--gradient-1);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease-out 0.3s both;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(99, 102, 241, 0.5);
}

.cta-button svg {
    transition: transform 0.3s ease;
}

.cta-button:hover svg {
    transform: translateX(5px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 12px;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-secondary), transparent);
}

/* ===== Benefits Section ===== */
.benefits {
    padding: 120px 0;
    background: var(--surface);
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 60px;
}

.section-title.light {
    color: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.benefit-card {
    background: var(--surface-light);
    padding: 40px 32px;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.benefit-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.benefit-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ===== Timer Section ===== */
.timer-section {
    padding: 100px 0;
    background: var(--gradient-1);
    text-align: center;
}

.timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.timer-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 24px 32px;
    border-radius: var(--radius);
    min-width: 100px;
}

.timer-value {
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 900;
    line-height: 1;
}

.timer-label {
    font-size: 14px;
    margin-top: 8px;
    opacity: 0.8;
}

.timer-separator {
    font-size: 3rem;
    font-weight: 300;
    opacity: 0.5;
}

/* ===== Apply Section ===== */
.apply-section {
    padding: 120px 0;
    background: var(--background);
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    margin-top: -40px;
}

.apply-form {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    padding: 16px 20px;
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.form-checkbox label {
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
}

.submit-button {
    margin-top: 16px;
    padding: 18px 40px;
    background: var(--gradient-1);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(99, 102, 241, 0.5);
}

.submit-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface);
    padding: 48px;
    border-radius: var(--radius);
    text-align: center;
    max-width: 400px;
    margin: 24px;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.modal-close {
    padding: 14px 40px;
    background: var(--primary);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease;
}

.modal-close:hover {
    background: var(--primary-dark);
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    background: var(--surface);
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    margin-top: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .timer-separator {
        display: none;
    }
    
    .timer {
        gap: 12px;
    }
    
    .timer-unit {
        padding: 16px 20px;
        min-width: 70px;
    }
    
    .benefits {
        padding: 80px 0;
    }
    
    .apply-section {
        padding: 80px 0;
    }
}