/**
 * =============================================================
 * CitaFlow — main.css
 * Variables globales, reset y componentes base del sistema
 * =============================================================
 *
 * ESTRUCTURA DE ESTE ARCHIVO:
 *   1. Variables CSS (tokens de diseño)
 *   2. Reset y base
 *   3. Tipografía
 *   4. Componentes reutilizables (botones, badges, cards, modals)
 *   5. Utilidades
 *
 * CÓMO PERSONALIZAR:
 *   Los colores del negocio (--color-primary, --color-accent) se
 *   sobreescriben dinámicamente desde JavaScript al cargar el panel.
 *   Ver: js/api.js → función applyBusinessColors()
 *
 * FUENTES (cargadas desde Google Fonts en el HTML):
 *   --font-display: 'Syne'    → Títulos y encabezados. Geométrica, moderna.
 *   --font-body:    'DM Sans' → Cuerpo de texto. Legible, neutral.
 */

/* ============================================================
   1. VARIABLES CSS
   ============================================================ */
:root {
  /* Paleta base (oscura, elegante) */
  --color-bg:          #0b0f1a;   /* Fondo principal muy oscuro */
  --color-surface:     #111827;   /* Tarjetas y paneles */
  --color-surface-2:   #1e2a3a;   /* Hover y fondos secundarios */
  --color-border:      #2d3748;   /* Bordes sutiles */

  /* Color de marca — se sobreescribe por negocio */
  --color-primary:     #6366f1;   /* Índigo vibrante por defecto */
  --color-primary-dim: #6366f120; /* Versión transparente para fondos */
  --color-accent:      #22d3ee;   /* Cian para detalles y highlights */

  /* Texto */
  --color-text:        #f1f5f9;   /* Texto principal */
  --color-text-muted:  #94a3b8;   /* Texto secundario */
  --color-text-faint:  #475569;   /* Texto deshabilitado/placeholder */

  /* Estados semánticos */
  --color-success:     #10b981;
  --color-warning:     #f59e0b;
  --color-error:       #ef4444;
  --color-info:        #3b82f6;

  /* Espaciado */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Tipografía */
  --font-display: 'Syne', system-ui, sans-serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Bordes */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px var(--color-primary-dim);

  /* Transiciones */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  /* Sidebar */
  --sidebar-width: 260px;
}

/* ============================================================
   2. RESET Y BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent); }

/* ============================================================
   3. TIPOGRAFÍA
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }

p { color: var(--color-text-muted); max-width: 65ch; }

.text-muted  { color: var(--color-text-muted); }
.text-faint  { color: var(--color-text-faint); }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-sm     { font-size: 0.875rem; }
.text-xs     { font-size: 0.75rem; }

/* ============================================================
   4. COMPONENTES REUTILIZABLES
   ============================================================ */

/* --- Botones --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 12px var(--color-primary-dim);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px var(--color-primary-dim);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-danger {
  background: var(--color-error);
  color: #fff;
}

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

/* --- Badges de estado --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-pending   { background: #f59e0b20; color: #f59e0b; }
.badge-confirmed { background: #3b82f620; color: #3b82f6; }
.badge-completed { background: #10b98120; color: #10b981; }
.badge-cancelled { background: #ef444420; color: #ef4444; }
.badge-no_show   { background: #8b5cf620; color: #8b5cf6; }
.badge-trial     { background: #f59e0b20; color: #f59e0b; }
.badge-active    { background: #10b98120; color: #10b981; }

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover { border-color: var(--color-primary); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

/* KPI Card */
.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.kpi-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.kpi-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.kpi-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  word-break: break-word;
}

.kpi-label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Formularios --- */
.form-group { display: flex; flex-direction: column; gap: var(--space-xs); }

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder { color: var(--color-text-faint); }

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

.form-control.error { border-color: var(--color-error); }

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: 4px;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal { transform: scale(1) translateY(0); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover { background: var(--color-error); color: #fff; }

/* --- Toast Notifications --- */
#toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  min-width: 280px;
  max-width: 380px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  box-shadow: var(--shadow-lg);
  animation: slideInToast 300ms ease forwards;
  font-size: 0.9rem;
}

.toast.success { border-left-color: var(--color-success); }
.toast.error   { border-left-color: var(--color-error); }
.toast.warning { border-left-color: var(--color-warning); }

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* --- Loading Spinner --- */
.spinner {
  width: 24px; height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11,15,26,0.7);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: inherit;
}

/* ============================================================
   5. UTILIDADES
   ============================================================ */
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm      { gap: var(--space-sm); }
.gap-md      { gap: var(--space-md); }
.gap-lg      { gap: var(--space-lg); }
.mt-sm       { margin-top: var(--space-sm); }
.mt-md       { margin-top: var(--space-md); }
.mt-lg       { margin-top: var(--space-lg); }
.mb-md       { margin-bottom: var(--space-md); }
.mb-lg       { margin-bottom: var(--space-lg); }
.hidden      { display: none !important; }
.relative    { position: relative; }
.w-full      { width: 100%; }
.text-center { text-align: center; }
.truncate    { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Scrollbar personalizado */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-faint); }

/* Animaciones de entrada */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-in { animation: fadeIn 300ms ease forwards; }

.animate-fade-in-delay-1 { animation: fadeIn 300ms 100ms ease both; }
.animate-fade-in-delay-2 { animation: fadeIn 300ms 200ms ease both; }
.animate-fade-in-delay-3 { animation: fadeIn 300ms 300ms ease both; }
.animate-fade-in-delay-4 { animation: fadeIn 300ms 400ms ease both; }

/* ============================================================
   RESPONSIVE COMPLETO — iPhone / Mobile First
   Breakpoints: 390px (iPhone 17), 430px, 768px, 1024px
   ============================================================ */

/* Tipografía fluida — nunca estática */
:root {
  --fs-xs:   clamp(0.65rem,  1.8vw, 0.72rem);
  --fs-sm:   clamp(0.75rem,  2vw,   0.82rem);
  --fs-base: clamp(0.875rem, 2.2vw, 0.95rem);
  --fs-md:   clamp(1rem,     2.5vw, 1.05rem);
  --fs-lg:   clamp(1.1rem,   3vw,   1.25rem);
  --fs-xl:   clamp(1.25rem,  4vw,   1.5rem);
  --fs-2xl:  clamp(1.4rem,   5vw,   2rem);
  --fs-3xl:  clamp(1.8rem,   6vw,   2.8rem);
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body { font-size: var(--fs-base); }

/* KPI cards compactos en móvil — 2x2 grid */
@media (max-width: 768px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr) !important; gap: var(--space-sm) !important; }
  .grid-3 { grid-template-columns: repeat(2, 1fr) !important; }
  .grid-2 { grid-template-columns: 1fr !important; }
}

/* iPhone 17 específico */
@media (max-width: 430px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }

  .kpi-card { padding: var(--space-sm) !important; }
  .kpi-icon { width: 32px !important; height: 32px !important; }
  .kpi-icon svg { width: 16px !important; height: 16px !important; }
  .kpi-value { font-size: var(--fs-xl) !important; }
  .kpi-label { font-size: var(--fs-xs) !important; letter-spacing: 0.04em !important; }

  /* Cards genéricas */
  .card { padding: var(--space-md) !important; border-radius: var(--radius-md) !important; }
  .card-title { font-size: var(--fs-md) !important; }

  /* Botones más fáciles de tocar */
  .btn { min-height: 44px !important; font-size: var(--fs-sm) !important; }
  .btn-sm { min-height: 36px !important; font-size: var(--fs-xs) !important; }

  /* Formularios */
  .form-control { font-size: var(--fs-base) !important; min-height: 44px !important; }
  .form-label { font-size: var(--fs-xs) !important; }

  /* Header */
  h2 { font-size: var(--fs-2xl) !important; }
  h3 { font-size: var(--fs-lg) !important; }
}