/* ========== Reset & Base ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-main: #faf9f7;
  --bg-card: #ffffff;
  --bg-dark: #1a1a19;
  --color-primary: #c9694a;
  --color-primary-hover: #b85a3d;
  --color-primary-dim: rgba(201,105,74,0.1);
  --color-text: #2c2c2b;
  --color-text-muted: #6b6b68;
  --color-text-dim: #999996;
  --color-border: #e5e3df;
  --color-border-light: #f0eeeb;
  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-danger: #ef4444;
  --color-info: #c9694a;
  --color-highlight: #c9694a;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: all 0.2s ease;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
}

body {
  font-family: var(--font-body);
  background: var(--bg-main);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
}

a { color: var(--color-text); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary); }

::selection {
  background: rgba(201,105,74,0.2);
  color: var(--color-text);
}

/* scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d4d2ce; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #b8b6b2; }

/* ========== Utility ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }

/* ========== Navbar (index page) ========== */
.navbar {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar .logo {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.02em;
}

.navbar .logo .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.navbar .nav-center {
  display: flex;
  align-items: center;
  gap: 4px;
}

.navbar .nav-center a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.navbar .nav-center a:hover {
  color: var(--color-text);
  background: var(--bg-main);
}

.navbar .nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar .nav-right a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.navbar .nav-right a:hover { color: var(--color-text); }

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 24px;
  height: auto;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: none;
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-main);
  border-color: #cccac6;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.btn-outline:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-danger {
  background: rgba(239,68,68,0.08);
  color: var(--color-danger);
  border: 1px solid rgba(239,68,68,0.15);
}
.btn-danger:hover:not(:disabled) {
  background: rgba(239,68,68,0.15);
}

.btn-success {
  background: rgba(34,197,94,0.08);
  color: var(--color-success);
  border: 1px solid rgba(34,197,94,0.15);
}
.btn-success:hover:not(:disabled) {
  background: rgba(34,197,94,0.15);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  padding: 6px 12px;
}
.btn-ghost:hover:not(:disabled) {
  color: var(--color-text);
  background: var(--bg-main);
}

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-xs { padding: 4px 10px; font-size: 12px; }

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== Hero Section ========== */
.hero {
  background: var(--bg-main);
  padding: 80px 24px 60px;
  text-align: center;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 52px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero .subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-actions .btn {
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 16px;
}

.hero-stats .stat-item {
  text-align: center;
}

.hero-stats .stat-num {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
}

.hero-stats .stat-label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ========== Providers Bar ========== */
.providers-bar {
  background: #f3f1ed;
  padding: 40px 24px;
  text-align: center;
}

.providers-bar .bar-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  font-weight: 500;
}

.providers-bar .pills {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.providers-bar .pill {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

/* ========== Features Section ========== */
.features-section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.features-section .section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.features-section .section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 16px;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.feature-card .feature-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========== Pricing Table Section ========== */
.pricing-section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-section .section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.pricing-section .section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 16px;
  margin-bottom: 48px;
}

.pricing-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.pricing-table-wrap table {
  width: 100%;
  border-collapse: collapse;
}

.pricing-table-wrap thead th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 20px;
  text-align: left;
  background: var(--bg-main);
}

.pricing-table-wrap tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 14px;
}

.pricing-table-wrap tbody tr:last-child td {
  border-bottom: none;
}

.pricing-table-wrap tbody tr:hover {
  background: var(--bg-main);
}

.pricing-link {
  display: block;
  text-align: center;
  padding: 20px;
  color: var(--color-primary);
  font-weight: 500;
  font-size: 14px;
  border-top: 1px solid var(--color-border-light);
}

.pricing-link:hover {
  color: var(--color-primary-hover);
}

/* ========== Code Example Section ========== */
.code-section {
  background: var(--bg-dark);
  padding: 80px 24px;
}

.code-section .section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.code-section .section-subtitle {
  text-align: center;
  color: #999996;
  font-size: 16px;
  margin-bottom: 40px;
}

.code-section .code-card {
  max-width: 700px;
  margin: 0 auto;
  background: #0d0d0c;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.code-section .code-card .code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-section .code-card .code-dots {
  display: flex;
  gap: 6px;
}

.code-section .code-card .code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
}

.code-section .code-card .copy-btn-hero {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: #999;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.code-section .code-card .copy-btn-hero:hover {
  background: rgba(255,255,255,0.14);
  color: #fff;
}

.code-section pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #d4d4d4;
  margin: 0;
}

.code-section .code-key { color: #9cdcfe; }
.code-section .code-str { color: #ce9178; }
.code-section .code-flag { color: #dcdcaa; }
.code-section .code-comment { color: #6a9955; }

/* ========== FAQ Section ========== */
.faq-section {
  padding: 80px 24px;
  max-width: 800px;
  margin: 0 auto;
}

.faq-section .section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: -0.02em;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  background: var(--bg-card);
  overflow: hidden;
}

.faq-item .faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  transition: var(--transition);
}

.faq-item .faq-question:hover {
  background: var(--bg-main);
}

.faq-item .faq-question .faq-arrow {
  font-size: 18px;
  color: var(--color-text-muted);
  transition: transform 0.2s;
}

.faq-item.open .faq-question .faq-arrow {
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-item .faq-answer p {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark);
  color: #999996;
  padding: 60px 24px 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .footer-logo {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand .footer-logo .logo-icon {
  width: 30px;
  height: 30px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.6;
  color: #6b6b68;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  color: #6b6b68;
  font-size: 13px;
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: #4a4a48;
}

/* ========== Auth Modal ========== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

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

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 480px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
  transform: translateY(10px);
  transition: transform 0.25s ease;
}

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

.modal.wide {
  max-width: 640px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--color-text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--bg-main);
  color: var(--color-text);
}

.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

/* Auth Tabs */
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.auth-tabs button {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.auth-tabs button.active {
  background: var(--color-primary);
  color: #fff;
}

.auth-tabs button:not(.active):hover {
  background: var(--bg-main);
}

/* ========== Forms ========== */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--color-text);
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(201,105,74,0.1);
}

.form-group input:disabled {
  background: var(--bg-main);
  color: var(--color-text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

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

/* ========== Alerts ========== */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 12px;
}

.alert-error {
  background: rgba(239,68,68,0.08);
  color: var(--color-danger);
  border: 1px solid rgba(239,68,68,0.15);
}

.alert-success {
  background: rgba(34,197,94,0.08);
  color: var(--color-success);
  border: 1px solid rgba(34,197,94,0.15);
}

.alert-warning {
  background: rgba(234,179,8,0.08);
  color: #a16207;
  border: 1px solid rgba(234,179,8,0.15);
}

.alert-info {
  background: var(--color-primary-dim);
  color: var(--color-primary);
  border: 1px solid rgba(201,105,74,0.15);
}

/* ========== Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: rgba(34,197,94,0.08);
  color: var(--color-success);
}

.badge-danger {
  background: rgba(239,68,68,0.08);
  color: var(--color-danger);
}

.badge-warning {
  background: rgba(234,179,8,0.08);
  color: #a16207;
}

.badge-info {
  background: var(--color-primary-dim);
  color: var(--color-primary);
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  animation: toastIn 0.3s ease forwards;
  color: var(--color-text);
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-danger); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-info { border-left: 3px solid var(--color-primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateX(40px); }
}

/* ========== Spinner ========== */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-lg {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.loading-mask {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 40px 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

/* ========== App Layout (dashboard/admin) ========== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 200;
  overflow-y: auto;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-header .logo-icon {
  width: 30px;
  height: 30px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.sidebar-header .logo-text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
}

.sidebar-nav {
  padding: 12px;
  flex: 1;
}

.sidebar-nav .nav-section {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-dim);
  padding: 16px 12px 6px;
  font-weight: 600;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  color: var(--color-text-muted);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  margin-bottom: 2px;
}

.sidebar-nav a:hover {
  color: var(--color-text);
  background: var(--bg-main);
}

.sidebar-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-dim);
  font-weight: 500;
}

.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 0 3px 3px 0;
}

.sidebar-nav .nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.3);
  z-index: 199;
}

.sidebar-overlay.active {
  display: block;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 240px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Topbar */
.topbar {
  height: 60px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-left h1 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.balance-tag {
  background: var(--color-primary-dim);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-avatar {
  width: 30px;
  height: 30px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--color-text);
  padding: 4px 8px;
}

/* Content Area */
.content-area {
  flex: 1;
  padding: 24px;
}

/* Panels */
.panel {
  display: none;
}

.panel.active {
  display: block;
}

/* ========== Stats Grid ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
  overflow: hidden;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.stat-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card:nth-child(1)::before { background: var(--color-primary); }
.stat-card:nth-child(2)::before { background: #3b82f6; }
.stat-card:nth-child(3)::before { background: var(--color-success); }
.stat-card:nth-child(4)::before { background: var(--color-warning); }
.stat-card:nth-child(5)::before { background: #8b5cf6; }
.stat-card:nth-child(6)::before { background: #06b6d4; }

.stat-card .icon {
  font-size: 22px;
  margin-bottom: 8px;
  line-height: 1;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.stat-card .label {
  font-size: 12px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 500;
  margin-bottom: 4px;
}

.stat-card .value {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
}

/* ========== Cards ========== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.card h2 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-header h2 {
  margin-bottom: 0;
}

/* ========== Tables ========== */
.table-wrapper {
  overflow-x: auto;
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
}

.table-wrapper thead th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  text-align: left;
  white-space: nowrap;
}

.table-wrapper tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 14px;
  color: var(--color-text);
}

.table-wrapper tbody tr:hover {
  background: var(--bg-main);
}

.table-wrapper tbody tr.empty-row:hover {
  background: transparent;
}

.table-wrapper tbody tr.empty-row td {
  text-align: center;
  color: var(--color-text-muted);
  padding: 32px 16px;
}

/* ========== Chart ========== */
.chart-container {
  padding: 16px 0;
  overflow: hidden;
  position: relative;
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  height: 200px;
  gap: 8px;
  padding: 0 8px;
  overflow: hidden;
  position: relative;
}

.bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

.bar-value {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.bar {
  width: 100%;
  max-width: 48px;
  background: var(--color-primary);
  border-radius: 4px 4px 0 0;
  min-height: 4px;
  transition: height 0.3s ease;
  opacity: 0.85;
}

.bar:hover {
  opacity: 1;
}

.bar-label {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 8px;
  white-space: nowrap;
}

/* ========== Models Grid (Dashboard) ========== */
.models-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 8px 0;
}

.model-card-mini {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-main);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 13px;
  transition: var(--transition);
}

.model-card-mini:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.model-provider-tag {
  display: inline-block;
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  line-height: 1.3;
}

.model-name-text {
  font-weight: 500;
  color: var(--color-text);
}

.model-price-text {
  font-size: 11px;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
}

/* ========== Quick Start ========== */
.quick-start {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.step-num {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content h4 {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.step-content p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* Code Block (dashboard) */
.code-block {
  background: var(--bg-dark);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #d4d4d4;
  margin: 0;
}

.code-block .copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: #999;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.code-block .copy-btn:hover {
  background: rgba(255,255,255,0.14);
  color: #fff;
}

/* ========== Key Mask ========== */
.key-mask {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: var(--transition);
}

.key-mask:hover {
  background: var(--bg-main);
  color: var(--color-text);
}

/* ========== Amount Grid ========== */
.amount-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.amount-btn {
  background: var(--bg-main);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
}

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

.amount-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
  color: var(--color-primary);
}

/* ========== Filter Bar ========== */
.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-bar input,
.filter-bar select {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 13px;
  color: var(--color-text);
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.filter-bar input:focus,
.filter-bar select:focus {
  border-color: var(--color-primary);
}

/* ========== Pagination ========== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 16px 0 0;
}

.pagination button {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination button.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination .page-info {
  padding: 0 4px;
  color: var(--color-text-muted);
  font-size: 13px;
}

/* ========== Preset Models ========== */
.preset-models {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-btn {
  background: var(--bg-main);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.preset-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-dim);
}

.preset-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stats .stat-num {
    font-size: 22px;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .menu-toggle {
    display: block;
  }

  .topbar-right span#topbar-username {
    display: none;
  }

  .amount-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .navbar .nav-center {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
  }

  .content-area {
    padding: 16px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stat-card {
    padding: 14px 16px;
  }

  .stat-card .value {
    font-size: 20px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
}

/* Models bar - backward compat for index.html models list */
.models-bar {
  display: none;
}

.models-list {
  display: none;
}