/* ============================================================
   SHIFT - Sistema de Temas con CSS Variables
   ============================================================ */

:root {
    /* Tema Light (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border: #dee2e6;
    --border-light: #e9ecef;
    
    /* Colores de acento */
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --success-hover: #059669;
    --error: #ef4444;
    --error-hover: #dc2626;
    --warning: #f59e0b;
    --warning-hover: #d97706;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transiciones */
    --transition: all 0.2s ease;
}

/* ============================================================
   Tema Oscuro
   ============================================================ */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-muted: #737373;
    --border: #404040;
    --border-light: #525252;
    
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --success: #34d399;
    --success-hover: #10b981;
    --error: #f87171;
    --error-hover: #ef4444;
    --warning: #fbbf24;
    --warning-hover: #f59e0b;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* ============================================================
   Tema Morado
   ============================================================ */
[data-theme="purple"] {
    --bg-primary: #1e1b2e;
    --bg-secondary: #2a2640;
    --bg-tertiary: #3a3551;
    --text-primary: #e0def4;
    --text-secondary: #908caa;
    --text-muted: #6e6a86;
    --border: #44415a;
    --border-light: #56526e;
    
    --accent: #c4a7e7;
    --accent-hover: #b091d9;
    --success: #9ccfd8;
    --success-hover: #7eb9c2;
    --error: #eb6f92;
    --error-hover: #d9557a;
    --warning: #f6c177;
    --warning-hover: #f0ad5e;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

/* ============================================================
   Tema Océano
   ============================================================ */
[data-theme="ocean"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --border-light: #475569;
    
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --success: #10b981;
    --success-hover: #059669;
    --error: #f43f5e;
    --error-hover: #e11d48;
    --warning: #f59e0b;
    --warning-hover: #d97706;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

/* ============================================================
   Transición suave entre temas
   ============================================================ */
* {
    transition: background-color 0.3s ease, 
                color 0.3s ease, 
                border-color 0.3s ease;
}