/* ============================================================
   Social Digest — main.css
   Reset + Variables + Tipografía global + Utilidades
   ============================================================ */

/* Variables */
:root {
  --color-bg: #FFFFFF;
  --color-surface: #F9F7F4;
  --color-border: #E8E8E8;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #6B6B6B;
  --color-text-muted: #9E9E9E;
  --color-accent: #DA4167;
  --color-accent-hover: #B8334F;
  --color-success: #1A8917;
  --color-warning: #F4A100;
  --color-error: #D93025;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --radius-sm: 4px;
  --radius-full: 50%;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 2px 6px rgba(0,0,0,0.12);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
}

/* Utilidades básicas */
a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* Botones */
.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background 150ms ease;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: color 150ms ease, background 150ms ease;
  border: 1px solid var(--color-border);
  cursor: pointer;
  font-family: inherit;
}

.btn-secondary:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--color-text-secondary);
  padding: 6px var(--space-1);
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: color 150ms ease, background 150ms ease;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

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

/* Contenedores */
.container {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 var(--space-2);
}

.container-narrow {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 var(--space-2);
}

/* Header global */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-2);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.site-header__logo {
  font-family: Georgia, serif;
  font-size: 20px;
  font-weight: bold;
  color: var(--color-text-primary);
}

.site-header__logo span {
  color: var(--color-accent);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-6) var(--space-2);
  color: var(--color-text-muted);
  font-size: 14px;
}

.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-2);
  color: var(--color-text-muted);
}

.empty-state h3 {
  font-size: 18px;
  margin-bottom: var(--space-1);
  color: var(--color-text-secondary);
}

/* Badge / Tag */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge--instagram {
  background: #fce4ec;
  color: #880e4f;
}

.badge--facebook {
  background: #e3f2fd;
  color: #0d47a1;
}

/* Toast / notificación */
.toast {
  position: fixed;
  bottom: var(--space-3);
  right: var(--space-3);
  background: var(--color-text-primary);
  color: white;
  padding: 10px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 14px;
  box-shadow: var(--shadow-md);
  z-index: 1000;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 200ms ease, transform 200ms ease;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-error); }
.toast--warning { background: var(--color-warning); color: var(--color-text-primary); }