:root {
    /* Light Theme Vars */
    --bg-color: #FFFFFF;
    --card-bg: #F8FAFC;
    --text-color: #0F172A;
    --text-muted: #64748B;
    --primary-color: #1E40AF;
    --secondary-color: #64728C;
    --success-color: #059669;
    --danger-color: #BE123C;
    --warning-color: #D97706;
    --border-color: #E2E8F0;
    --input-bg: #FFFFFF;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme='dark'] {
    /* Dark Theme Vars */
    --bg-color: #020617;
    --card-bg: #0F172A;
    --text-color: #F8FAFC;
    --text-muted: #94A3B8;
    --primary-color: #3B82F6;
    --secondary-color: #475569;
    --success-color: #10B981;
    --danger-color: #FB7185;
    --warning-color: #FBBF24;
    --border-color: #1E293B;
    --input-bg: #1E293B;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Glassmorphism para Overlays y Modales */
.glass {
    background: rgba(255, 255, 255, 0.7) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
}

[data-theme='dark'] .glass {
    background: rgba(15, 23, 42, 0.8) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
    line-height: 1.6;
    min-height: 100vh;
}

/* Modales y Paneles Flotantes */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.hidden {
    display: none !important;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

/* Tarjetas */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

/* Botones Estandarizados */
.btn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.btn {
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--primary-color); color: #fff; }
.btn-save { background: var(--success-color); color: #fff; }
.btn-edit { background: var(--primary-color); color: #fff; }
.btn-cancel { background: var(--secondary-color); color: #fff; }
.btn-delete { background: var(--danger-color); color: #fff; }
.btn-update { background: #0ea5e9; color: #fff; }
.btn-add { background: var(--success-color); color: #fff; }

.btn-mini {
    padding: 8px;
    min-width: 36px;
    min-height: 36px;
    border-radius: 8px;
}

.btn-outline { background: transparent; border: 2px solid var(--border-color); color: var(--text-color); }
.btn-outline:hover { border-color: var(--primary-color); color: var(--primary-color); }

/* Formularios */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

label {
    display: block;
    font-size: 0.75rem;
    font-weight: 800;
    margin-bottom: 6px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input, select, textarea {
    width: 100%;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
    font-weight: 600;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Utilidades Layout */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.w-full { width: 100%; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.hidden { display: none !important; }
.text-center { text-align: center; }