@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0a0b0f;
  --bg-secondary: #111318;
  --bg-tertiary: #1a1c24;
  --bg-card: rgba(22, 24, 32, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #f0f0f5;
  --text-secondary: #8b8fa3;
  --text-muted: #5a5e72;
  --accent-blue: #4f8ff7;
  --accent-purple: #a855f7;
  --accent-green: #22c55e;
  --accent-orange: #f59e0b;
  --accent-pink: #ec4899;
  --accent-cyan: #06b6d4;
  --accent-red: #ef4444;
  --accent-teal: #14b8a6;
  --accent-yellow: #eab308;
  --gradient-primary: linear-gradient(135deg, #4f8ff7, #a855f7);
  --gradient-hero: linear-gradient(135deg, rgba(79,143,247,0.15), rgba(168,85,247,0.15));
  --sidebar-width: 260px;
  --sidebar-collapsed: 70px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  padding: 20px 20px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 24px;
  filter: drop-shadow(0 0 8px rgba(79,143,247,0.5));
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.3px;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: none;
}

.sidebar-toggle:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 16px 14px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

.nav-item:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(79,143,247,0.1);
  color: var(--accent-blue);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--gradient-primary);
  border-radius: 0 3px 3px 0;
}

.nav-icon {
  font-size: 16px;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
}

.api-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-red);
  flex-shrink: 0;
  transition: var(--transition);
}

.status-dot.active {
  background: var(--accent-green);
  box-shadow: 0 0 8px rgba(34,197,94,0.5);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px 40px;
  min-height: 100vh;
  transition: var(--transition);
}

/* ===== Pages ===== */
.page {
  display: none;
  animation: fadeIn 0.35s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
}

/* ===== Dashboard Grid ===== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.dash-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.dash-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.dash-card-glow {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.15;
  transition: var(--transition);
}

.dash-card:hover .dash-card-glow { opacity: 0.3; }

.glow-blue { background: var(--accent-blue); }
.glow-purple { background: var(--accent-purple); }
.glow-green { background: var(--accent-green); }
.glow-orange { background: var(--accent-orange); }
.glow-pink { background: var(--accent-pink); }
.glow-cyan { background: var(--accent-cyan); }
.glow-red { background: var(--accent-red); }
.glow-teal { background: var(--accent-teal); }
.glow-yellow { background: var(--accent-yellow); }

.dash-card-hero {
  grid-column: span 2;
  background: var(--gradient-hero);
  border-color: rgba(79,143,247,0.2);
}

.dash-card-icon {
  font-size: 32px;
  display: block;
  margin-bottom: 12px;
}

.dash-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.dash-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
}

.dash-card-action {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-blue);
  transition: var(--transition);
}

.dash-card:hover .dash-card-action {
  letter-spacing: 0.5px;
}

/* ===== Forms ===== */
.skill-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input, .form-textarea {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(79,143,247,0.15);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 60px;
}

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

select.form-input {
  cursor: pointer;
  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 d='M6 8L1 3h10z' fill='%238b8fa3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* ===== Buttons ===== */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: var(--transition);
}

.btn-primary:hover::after { opacity: 1; }

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79,143,247,0.3);
}

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

.btn-primary.loading {
  pointer-events: none;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
}

.btn-icon {
  font-size: 15px;
}

/* ===== Results ===== */
.result-container {
  min-height: 0;
  transition: var(--transition);
}

.result-container:empty {
  display: none;
}

.result-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  animation: fadeIn 0.4s ease;
}

.result-panel h1, .result-panel h2, .result-panel h3, .result-panel h4 {
  color: var(--text-primary);
  margin-top: 24px;
  margin-bottom: 10px;
}

.result-panel h1 { font-size: 22px; font-weight: 800; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; }
.result-panel h2 { font-size: 18px; font-weight: 700; }
.result-panel h3 { font-size: 15px; font-weight: 600; color: var(--accent-blue); }
.result-panel h4 { font-size: 14px; font-weight: 600; }

.result-panel p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
  font-size: 14px;
}

.result-panel ul, .result-panel ol {
  color: var(--text-secondary);
  padding-left: 24px;
  margin-bottom: 12px;
  line-height: 1.7;
  font-size: 14px;
}

.result-panel li {
  margin-bottom: 4px;
}

.result-panel strong {
  color: var(--text-primary);
  font-weight: 600;
}

.result-panel code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  color: var(--accent-cyan);
}

.result-panel pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

.result-panel pre code {
  background: none;
  padding: 0;
}

.result-panel table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 13px;
}

.result-panel th {
  background: var(--bg-tertiary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.result-panel td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.result-panel tr:hover td {
  background: var(--bg-glass);
}

.result-panel blockquote {
  border-left: 3px solid var(--accent-purple);
  padding: 10px 16px;
  margin: 12px 0;
  background: rgba(168,85,247,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.result-panel hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 24px 0;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.result-header h2 {
  margin: 0;
  font-size: 16px;
}

.copy-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.copy-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* ===== Loading ===== */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  gap: 16px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 14px;
  color: var(--text-secondary);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ===== Settings ===== */
.settings-container {
  display: grid;
  gap: 20px;
}

.settings-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.settings-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.settings-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

.settings-desc a {
  color: var(--accent-blue);
  text-decoration: none;
}

.settings-desc a:hover {
  text-decoration: underline;
}

.api-test-result {
  margin-top: 12px;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  display: none;
}

.api-test-result.success {
  display: block;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.2);
  color: var(--accent-green);
}

.api-test-result.error {
  display: block;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.2);
  color: var(--accent-red);
}

/* ===== Error State ===== */
.error-state {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  color: var(--accent-red);
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.error-state .error-icon {
  font-size: 20px;
  flex-shrink: 0;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-content {
    padding: 24px 24px;
  }
  .dash-card-hero {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .sidebar-toggle {
    display: block;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: var(--radius-sm);
  }
  .main-content {
    margin-left: 0;
    padding: 70px 16px 24px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Auth Modal ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.85);backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:36px;max-width:420px;width:100%;animation:fadeIn .3s ease}
.modal-header{text-align:center;margin-bottom:24px}
.modal-header h2{font-size:24px;font-weight:800;margin-bottom:6px}
.modal-header p{color:var(--text-secondary);font-size:14px}
.auth-error{margin-top:12px;color:var(--accent-red);font-size:13px;text-align:center}
.auth-toggle{text-align:center;margin-top:20px;font-size:13px;color:var(--text-secondary)}
.auth-toggle a{color:var(--accent-blue);font-weight:600;margin-left:4px;text-decoration:none}
.auth-back{display:block;text-align:center;margin-top:16px;color:var(--text-muted);font-size:12px;text-decoration:none}
.auth-back:hover{color:var(--text-primary)}

/* ===== Paywall Overlay ===== */
.paywall-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.9);backdrop-filter:blur(12px);z-index:999;display:flex;align-items:center;justify-content:center;padding:20px}
.paywall-card{background:var(--bg-secondary);border:1px solid rgba(168,85,247,0.3);border-radius:var(--radius-xl);padding:44px;max-width:460px;width:100%;text-align:center;animation:fadeIn .3s ease}
.paywall-icon{font-size:48px;display:block;margin-bottom:16px}
.paywall-card h2{font-size:24px;font-weight:800;margin-bottom:12px}
.paywall-card p{color:var(--text-secondary);font-size:14px;line-height:1.6;margin-bottom:24px}
.paywall-home{display:block;margin-top:16px;color:var(--text-muted);font-size:13px;text-decoration:none}

/* ===== Usage Badge ===== */
.usage-badge{display:flex;align-items:center;gap:8px;background:rgba(79,143,247,0.1);border:1px solid rgba(79,143,247,0.2);border-radius:var(--radius-sm);padding:8px 12px;margin-bottom:10px}
.usage-count{font-size:18px;font-weight:800;color:var(--accent-blue)}
.usage-label{font-size:11px;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.5px}

/* ===== User Info ===== */
.user-info{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;font-size:12px}
.user-name{color:var(--text-secondary);font-weight:500}
.logout-link{color:var(--text-muted);text-decoration:none;font-size:11px}
.logout-link:hover{color:var(--accent-red)}

.provider-links a{color:var(--accent-blue);text-decoration:none}
.provider-links a:hover{text-decoration:underline}