/* ====== CSS VARIABLES & BASE STYLES ====== */
:root {
    --bg-primary: #1a1d29;
    --bg-secondary: #252a3a;
    --bg-tertiary: #2e3440;
    --accent-primary: #00d4ff;
    --accent-secondary: #00ff88;
    --text-primary: #e0e6ed;
    --text-secondary: #8b95a7;
    --border-color: #3a3f4f;
    --success: #00ff88;
    --error: #ff4757;
    --warning: #ffa502;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

h1 {
    color: var(--accent-primary);
    margin-bottom: 30px;
    text-align: center;
    font-size: 28px;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

/* ====== LAYOUT & GRID ====== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

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

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .tab {
        flex: none;
        min-width: calc(50% - 2px);
    }
}

/* ====== SCROLLBAR ====== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #00b4d9;
}

/* ====== UTILITIES ====== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-20 {
    margin-bottom: 20px;
}