/* * Vivaura Technologies Design System v1
 * 통합 스타일 시트
 */

/* =========================================
   1. Design Tokens (Variables)
   ========================================= */
:root {
    /* Brand Colors */
    --color-bg-main: #0B1020;       /* Deep Navy */
    --color-surface: #1C1F2A;       /* Graphite */
    --color-surface-light: #2B3040; /* Slate */
    
    /* Accent Colors */
    --color-primary: #3A7DFF;       /* Azure */
    --color-secondary: #00D1B2;     /* Teal */
    --color-accent: #A6FF3B;        /* Lime */
    
    /* Text Colors */
    --color-text-white: #FFFFFF;
    --color-text-silver: #AEB4C2;
    --color-text-muted: #6B7280;

    /* Gradients */
    --grad-aurora: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    --grad-aurora-hover: linear-gradient(90deg, var(--color-secondary), var(--color-accent), var(--color-primary));

    /* Effects */
    --glass-bg: rgba(28, 31, 42, 0.6);
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    --glass-blur: blur(12px);
    --shadow-glow: 0 0 20px rgba(0, 209, 178, 0.15);
    
    /* Typography */
    --font-main: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --ease-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
   2. Base & Reset
   ========================================= */
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-main);
    color: var(--color-text-silver);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-main); }
::-webkit-scrollbar-thumb { background: var(--color-surface-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-secondary); }

/* =========================================
   3. Utilities & Typography
   ========================================= */
.text-aurora {
    background: var(--grad-aurora);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.text-gradient-sub {
    background: linear-gradient(to right, #fff, #AEB4C2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* =========================================
   4. UI Components
   ========================================= */

/* Glass Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 1rem;
    transition: var(--ease-smooth);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    font-weight: 700;
    transition: var(--ease-smooth);
    cursor: pointer;
    border: none;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--grad-aurora);
    background-size: 200% auto;
    color: var(--color-bg-main);
}

.btn-primary:hover {
    background-position: right center;
    box-shadow: 0 4px 15px rgba(0, 209, 178, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--color-surface-light);
    color: var(--color-text-white);
    border: 1px solid transparent;
}

.btn-secondary:hover {
    background-color: var(--color-surface);
    border-color: var(--color-text-silver);
}

/* Header */
.header-glass {
    background-color: rgba(11, 16, 32, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    transition: var(--ease-smooth);
}

/* Footer */
.footer-vivaura {
    background-color: var(--color-bg-main);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 1.5rem;
    margin-top: auto;
}

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

.footer-link:hover {
    color: var(--color-text-white);
}

/* Form Styles */
.form-input, .form-select, .form-textarea {
    width: 100%;
    background-color: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    color: var(--color-text-white);
    padding: 0.875rem 1rem;
    border-radius: 0.75rem;
    outline: none;
    transition: var(--ease-smooth);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--color-secondary);
    background-color: rgba(43, 48, 64, 0.9);
    box-shadow: 0 0 0 2px rgba(0, 209, 178, 0.2);
}

.checkbox-custom {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 1px solid var(--color-text-silver);
    border-radius: 0.25rem;
    background-color: var(--color-surface-light);
    cursor: pointer;
    position: relative;
    margin-top: 0.25rem;
}

.checkbox-custom:checked {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3e%3c/svg%3e");
}

/* Animation Background */
.bg-glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.15;
    animation: aurora-pulse 10s infinite alternate;
}
@keyframes aurora-pulse {
    0% { transform: scale(1); opacity: 0.1; }
    100% { transform: scale(1.1); opacity: 0.2; }
}