/* ============================================ */
/* SISTEMA DE DISEÑO — SyncStudy 2.0             */
/* "Estudiar mejor, juntos." · índigo + violeta  */
/* ============================================ */

:root {
  /* ===== ESCALAS DE MARCA ===== */
  --indigo-50:#EEF2FF;  --indigo-100:#E0E7FF; --indigo-200:#C7D2FE;
  --indigo-500:#6366F1; --indigo-600:#4F46E5; --indigo-700:#4338CA;
  --violet-50:#F5F3FF;  --violet-100:#EDE9FE; --violet-500:#8B5CF6; --violet-600:#7C3AED;
  --green-50:#F0FDF4;   --green-100:#DCFCE7;  --green-500:#22C55E; --green-600:#16A34A;
  --amber-50:#FFFBEB;   --amber-100:#FEF3C7;  --amber-500:#F59E0B; --amber-600:#D97706;
  --rose-50:#FFF1F2;    --rose-100:#FFE4E6;   --rose-500:#EF4444; --rose-600:#DC2626;
  --sky-50:#EFF6FF;     --sky-100:#DBEAFE;    --sky-500:#3B82F6;

  /* ===== GRADIENTES ===== */
  --gradient-brand: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient-hero:  linear-gradient(135deg, #EEF2FF 0%, #F5F3FF 55%, #FFF1F2 100%);

  /* ===== ZONAS PASTEL POR MÓDULO (espíritu Zoho, no copia) ===== */
  --zone-tasks:    var(--indigo-50);
  --zone-progress: var(--green-50);
  --zone-group:    var(--violet-50);
  --zone-calendar: var(--sky-50);
  --zone-warn:     var(--amber-50);

  /* ===== NEUTROS (slate — NO blanco puro) ===== */
  --color-bg: #F7F8FC;            /* CANVAS off-white (main, topbar, body) */
  --color-bg-soft: #F1F3FA;       /* fills suaves: inputs, chips */
  --color-bg-elevated: #FFFFFF;   /* tarjetas */
  --color-surface: #FFFFFF;       /* tarjetas */
  --color-border: #E9EAF2;
  --color-border-strong: #D7D9E6;

  /* ===== TEXTO ===== */
  --color-text: #0F172A;
  --color-text-soft: #475569;
  --color-text-muted: #94A3B8;

  /* ===== ACENTO (índigo) ===== */
  --color-accent: #6366F1;
  --color-accent-hover: #4F46E5;
  --color-accent-soft: #EEF2FF;
  --color-accent-text: #4338CA;
  --color-secondary: #8B5CF6;

  /* ===== ESTADOS ===== */
  --color-success: #22C55E;
  --color-success-soft: #F0FDF4;
  --color-warning: #F59E0B;
  --color-warning-soft: #FFFBEB;
  --color-danger: #EF4444;
  --color-danger-soft: #FFF1F2;

  /* ===== PRIORIDADES ===== */
  --color-priority-high: #EF4444;
  --color-priority-high-soft: #FFE4E6;
  --color-priority-med: #F59E0B;
  --color-priority-med-soft: #FEF3C7;
  --color-priority-low: #22C55E;
  --color-priority-low-soft: #DCFCE7;

  /* ===== ESPACIADO ===== */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px;
  --space-12: 48px; --space-16: 64px;
  --space-section: 32px;

  /* ===== RADIOS (más redondeado = premium) ===== */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-card: 20px;
  --radius-2xl: 24px;
  --radius-full: 999px;

  /* ===== SOMBRAS (tinte índigo, no negro) ===== */
  --shadow-xs: 0 1px 2px rgba(79, 70, 229, 0.05);
  --shadow-sm: 0 1px 3px rgba(79, 70, 229, 0.07), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(79, 70, 229, 0.10);
  --shadow-lg: 0 12px 28px -8px rgba(79, 70, 229, 0.14);
  --shadow-xl: 0 24px 48px -12px rgba(79, 70, 229, 0.20);
  --shadow-card: 0 1px 2px rgba(79, 70, 229, 0.04), 0 8px 24px -10px rgba(79, 70, 229, 0.12);
  --shadow-pop: 0 12px 32px -8px rgba(79, 70, 229, 0.18);

  /* ===== TRANSICIONES ===== */
  --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== TIPOGRAFÍA ===== */
  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 15px;   /* subió de 14 → 15 */
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 26px;
  --font-size-3xl: 32px;
  --font-size-display: 36px;

  /* ===== LAYOUT ===== */
  --sidebar-width: 248px;
  --topbar-height: 64px;
  --content-max: 1600px;
}

/* ============================================ */
/* MODO OSCURO — override de neutros            */
/* (la marca índigo/violeta se mantiene)        */
/* ============================================ */
[data-theme="dark"] {
  --color-bg: #0F1117;
  --color-bg-soft: #1A1D27;
  --color-bg-elevated: #181B24;
  --color-surface: #181B24;
  --color-border: #272B38;
  --color-border-strong: #353A4A;

  --color-text: #F1F3F9;
  --color-text-soft: #AEB4C2;
  --color-text-muted: #6B7280;

  --color-accent-soft: #1F2236;
  --color-accent-text: #A5B4FC;

  --color-success-soft: #0E2A1C;
  --color-warning-soft: #2A2410;
  --color-danger-soft: #2A1416;
  --color-priority-high-soft: #2A1416;
  --color-priority-med-soft: #2A2410;
  --color-priority-low-soft: #0E2A1C;

  --indigo-100: #2A2F49;  --green-100: #16301F;  --violet-100: #261C3A;  --sky-100: #15263A;

  --zone-tasks:    #181B2C;
  --zone-progress: #10231A;
  --zone-group:    #1E1830;
  --zone-calendar: #111E2E;
  --zone-warn:     #241F12;

  --gradient-hero: linear-gradient(135deg, #1A1D2E 0%, #221B30 55%, #2A1620 100%);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 28px -8px rgba(0, 0, 0, 0.55);
  --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -10px rgba(0, 0, 0, 0.5);
}