@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
    --primary: #2563eb;
    --secondary: #1e40af;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-sub: #64748b;
    --danger: #ef4444;
    --success: #10b981;
}

body {
    font-family: 'Pretendard', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

nav {
    background: #0f172a;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { font-weight: 800; font-size: 1.2rem; letter-spacing: 1px; }

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.hero-section { text-align: center; margin-bottom: 50px; }
.hero-section h1 { font-size: 2.5rem; margin-bottom: 10px; color: #0f172a; }
.subtitle { color: var(--text-sub); font-size: 1.2rem; }

.app-interface {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    padding: 30px;
    margin-bottom: 50px;
}

.control-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: #f1f5f9;
    padding: 15px;
    border-radius: 8px;
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s;
}
.primary-btn:hover { background: var(--secondary); transform: translateY(-2px); }

.console-log {
    background: #1e1e1e;
    color: #00ff00;
    font-family: monospace;
    padding: 15px;
    border-radius: 6px;
    margin-top: 20px;
    height: 100px;
    overflow-y: auto;
    font-size: 0.9rem;
}

.cta-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    margin-bottom: 50px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.cta-button {
    display: inline-block;
    background: var(--success);
    color: white;
    text-decoration: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
    margin-top: 20px;
    transition: 0.3s;
}
.cta-button:hover { background: #059669; box-shadow: 0 0 15px rgba(16, 185, 129, 0.4); }

.pulse-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.technical-documentation {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}
.technical-documentation h2 { border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; margin-bottom: 20px; }
.technical-documentation p { margin-bottom: 20px; text-align: justify; }

footer { text-align: center; margin-top: 50px; color: var(--text-sub); border-top: 1px solid #e2e8f0; padding-top: 30px; }

@media (max-width: 768px) {
    .control-panel { flex-direction: column; gap: 10px; }
    .primary-btn { width: 100%; }
}