/* ============================================================
   OFWHAT EMS - Dark Theme Design System
   ============================================================ */

:root {
    /* Core Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a1f2e;
    --bg-card-hover: #1f2537;
    --bg-input: #0f1320;
    --bg-input-focus: #141929;

    /* Accent */
    --accent: #00d4ff;
    --accent-rgb: 0, 212, 255;
    --accent-dark: #00a8cc;
    --accent-glow: 0 0 20px rgba(0, 212, 255, 0.3);

    /* Status */
    --success: #00ff88;
    --success-rgb: 0, 255, 136;
    --warning: #ffaa00;
    --warning-rgb: 255, 170, 0;
    --danger: #ff4757;
    --danger-rgb: 255, 71, 87;

    /* Text */
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: var(--accent);

    /* Border */
    --border: #1e293b;
    --border-light: #2d3748;
    --border-accent: rgba(0, 212, 255, 0.3);

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* Font */
    --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.2s;
}
a:hover { opacity: 0.8; }

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* Glass Card */
.glass-card {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Glow Card (for stats) */
.glow-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.glow-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}
.glow-card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--accent-glow);
    transform: translateY(-2px);
}
.glow-card:hover::before { opacity: 1; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #000;
    box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}
.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(var(--accent-rgb), 0.5);
    transform: translateY(-1px);
}
.btn-primary:active {
    transform: translateY(0);
}
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
}
.btn-ghost:hover {
    color: var(--accent);
}

/* Form Controls */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 0.813rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: 0.02em;
}

.form-input {
    width: 100%;
    padding: 13px 16px;
    background: var(--bg-input);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.938rem;
    font-family: var(--font-sans);
    transition: all 0.2s;
    outline: none;
}
.form-input::placeholder {
    color: var(--text-muted);
}
.form-input:hover {
    border-color: var(--border-light);
}
.form-input:focus {
    border-color: var(--accent);
    background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.1);
}

/* Mono Numbers */
.font-mono {
    font-family: var(--font-mono);
}

/* Toast */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    animation: toastIn 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid;
    min-width: 280px;
}
.toast-success {
    background: rgba(var(--success-rgb), 0.1);
    border-color: rgba(var(--success-rgb), 0.3);
    color: var(--success);
}
.toast-error {
    background: rgba(var(--danger-rgb), 0.1);
    border-color: rgba(var(--danger-rgb), 0.3);
    color: var(--danger);
}
.toast-warning {
    background: rgba(var(--warning-rgb), 0.1);
    border-color: rgba(var(--warning-rgb), 0.3);
    color: var(--warning);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
    .glass-card {
        border-radius: var(--radius-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --radius-xl: 14px;
    }
}