:root {
  --bg-main: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #172033;
  --bg-sidebar: #0d131f;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #38bdf8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.brand-logo h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand-logo span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  text-align: left;
}

.nav-item i {
  width: 18px;
  height: 18px;
}

.nav-item:hover {
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.15), rgba(56, 189, 248, 0.05));
  color: var(--accent);
  border-left: 3px solid var(--accent);
}

.badge {
  margin-left: auto;
  background: rgba(245, 158, 11, 0.2);
  color: var(--warning);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 700;
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: var(--radius-sm);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 10px var(--success);
}

.status-title {
  font-size: 0.82rem;
  font-weight: 600;
}

.status-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 32px 40px;
  max-width: 1400px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 32px;
}

.topbar h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Tabs */
.tab-content {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Grids & Cards */
.grid-2-cols {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 28px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-main);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-main);
}

.card-title i {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

/* Forms */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

input[type="text"],
input[type="password"],
textarea,
select {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-main);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.2s;
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
  border-color: var(--border-focus);
  background-color: rgba(255, 255, 255, 0.07);
}

input[type="color"] {
  width: 100%;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  padding: 4px;
}

input[type="file"] {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.help-text {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Ratio Selector */
.ratio-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.ratio-option {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.2s;
  position: relative;
}

.ratio-option input {
  position: absolute;
  opacity: 0;
}

.ratio-option.active, .ratio-option:has(input:checked) {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
}

.ratio-box {
  background: #334155;
  border-radius: 4px;
  margin-bottom: 8px;
}

.ratio-1-1 { width: 34px; height: 34px; }
.ratio-4-5 { width: 30px; height: 38px; }
.ratio-191-1 { width: 44px; height: 23px; }

.ratio-option span {
  font-size: 0.85rem;
  font-weight: 600;
}

.ratio-option small {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Platforms Selector */
.platforms-selector {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.platform-checkbox-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.platform-checkbox-card:hover {
  background: rgba(255, 255, 255, 0.06);
}

.platform-checkbox-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.platform-info {
  flex: 1;
}

.platform-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.platform-tag {
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

.tag-facebook { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.tag-linkedin { background: rgba(14, 165, 233, 0.2); color: #38bdf8; }
.tag-instagram { background: rgba(236, 72, 153, 0.2); color: #f472b6; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #0284c7);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-success {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
  filter: brightness(1.1);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-lg {
  padding: 14px 22px;
  font-size: 0.98rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.w-full { width: 100%; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 20px; }
.text-center { text-align: center; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--text-muted); }
.uppercase { text-transform: uppercase; }
.hidden { display: none !important; }

/* Image Preview Section */
.image-preview-wrapper {
  background: #0b0f19;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.placeholder-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 30px;
  color: var(--text-muted);
}

.icon-xl {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  color: #334155;
}

#generated-image {
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

/* Historial de Posts Cards */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.post-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s;
}

.post-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
}

.post-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.post-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.status-pending_approval {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-published {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-rejected {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.post-theme-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}

.post-copy-snippet {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  flex: 1;
}

.post-card-actions {
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

/* Guide Box */
.guide-box {
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.guide-box h4 {
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.guide-box ol {
  padding-left: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Mic Dictation Button */
.label-with-action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.label-with-action label {
  margin-bottom: 0 !important;
}

.btn-mic {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-mic i {
  width: 14px;
  height: 14px;
}

.btn-mic:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--accent);
}

.btn-mic.listening {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border-color: var(--danger);
  animation: pulseMic 1.2s infinite;
}

@keyframes pulseMic {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* RESPONSIVE DESIGN (Móviles y Tablets) */
@media (max-width: 1024px) {
  .grid-2-cols {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: 16px;
  }

  .nav-menu {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .nav-item {
    padding: 8px 12px;
    font-size: 0.82rem;
    flex: 1 1 auto;
    justify-content: center;
  }

  .nav-item span:not(.badge) {
    display: inline-block;
  }

  .sidebar-footer {
    display: none;
  }

  .main-content {
    padding: 20px 16px;
  }

  .topbar {
    flex-direction: column;
    gap: 12px;
  }

  .topbar h1 {
    font-size: 1.4rem;
  }

  .ratio-selector {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .posts-grid {
    grid-template-columns: 1fr;
  }
}