:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --border-glow: rgba(59, 130, 246, 0.4);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
}

/* Glassmorphism Header */
.header-glass {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.brand-gradient {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: 0.5px;
}

/* Custom Cards */
.card-dark {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card-dark:hover {
    border-color: var(--border-glow);
    box-shadow: 0 12px 30px -5px rgba(59, 130, 246, 0.2);
}

/* IA Prompt Box */
.ia-prompt-box {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    position: relative;
}

.ia-prompt-box:focus-within {
    border-color: var(--accent-purple);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.ia-prompt-input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    width: 100%;
    resize: none;
}

.ia-prompt-input:focus {
    outline: none;
}

/* Gradient & Solid Buttons */
.btn-purple {
    background-color: var(--accent-purple);
    color: #ffffff !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-purple:hover {
    background-color: #7c3aed;
    color: #ffffff !important;
}

.btn-cyan {
    background-color: var(--accent-cyan);
    color: #0f172a !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-cyan:hover {
    background-color: #0891b2;
    color: #ffffff !important;
}

.btn-ia-gradient {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.4rem;
    transition: all 0.2s ease;
}

.btn-ia-gradient:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
    color: white;
}

/* Table Dark */
.table-dark-custom {
    color: var(--text-primary);
}

.table-dark-custom th {
    background-color: rgba(30, 41, 59, 0.9);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.table-dark-custom td {
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

/* Badges */
.badge-vis {
    padding: 0.35em 0.65em;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-table { background: rgba(59, 130, 246, 0.2); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-chart { background: rgba(139, 92, 246, 0.2); color: #c084fc; border: 1px solid rgba(139, 92, 246, 0.3); }
.badge-kpi { background: rgba(6, 182, 212, 0.2); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.3); }