:root {
  --bg-dark: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-input: #1e293b;
  --primary-emerald: #10b981;
  --primary-emerald-hover: #059669;
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: radial-gradient(circle at 10% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
                    radial-gradient(circle at 90% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 40%);
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--bg-card-border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary-emerald), var(--accent-cyan));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.brand-text h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #fff;
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--primary-emerald);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.api-key-box {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--bg-card-border);
  padding: 0.85rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.api-key-box label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.input-with-icon {
  display: flex;
  position: relative;
}

.input-with-icon input {
  width: 100%;
  padding-right: 2.2rem;
}

.btn-icon {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s;
  padding: 4px;
}

.btn-icon:hover {
  opacity: 1;
}

.help-text {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.35rem;
  display: block;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

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

.nav-item.active {
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.15), transparent);
  color: var(--primary-emerald);
  border-left: 3px solid var(--primary-emerald);
  font-weight: 600;
}

.sidebar-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--bg-card-border);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.server-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 2rem 2.5rem;
  max-width: 1200px;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.top-bar-title h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.top-bar-title p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

/* Cards & Forms */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--bg-card-border);
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.card-header p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.card-body {
  padding: 1.5rem;
}

.tab-pane {
  display: none;
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.col-6 { flex: 1; }
.col-4 { flex: 0.66; }
.col-2 { flex: 0.33; }

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.required {
  color: var(--danger);
}

input[type="text"],
input[type="password"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-input);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

textarea {
  resize: vertical;
}

.code-font {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.4;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
}

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

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

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

.btn-lg {
  padding: 0.9rem 1.8rem;
  font-size: 1rem;
}

.form-actions {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

/* Info Grid & Tables */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.info-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--bg-card-border);
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.info-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.info-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-top: 0.25rem;
  word-break: break-all;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--bg-card-border);
}

.data-table th {
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-muted);
  font-weight: 600;
}

.table-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  border-radius: 4px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.3);
  cursor: pointer;
}

.table-btn:hover {
  background: var(--accent-blue);
  color: #fff;
}

/* Response Panel & Code Generator */
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tab-switchers {
  display: flex;
  gap: 0.5rem;
}

.panel-tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.panel-tab-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.panel-content {
  display: none;
}

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

pre {
  background: #090d16;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  max-height: 400px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #a7f3d0;
}

.lang-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.lang-btn {
  background: var(--bg-input);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  padding: 0.4rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--primary-emerald);
  color: #fff;
  border-color: var(--primary-emerald);
}

.code-container {
  position: relative;
}

.btn-copy {
  position: absolute;
  right: 12px;
  top: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  backdrop-filter: blur(4px);
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Login Overlay & Security Modal */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.login-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  text-align: center;
}

.login-brand {
  margin-bottom: 2rem;
}

.login-brand .brand-icon {
  margin: 0 auto 1rem auto;
}

.login-brand h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
}

.login-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.login-form {
  text-align: left;
}

.error-msg {
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: 0.5rem;
  display: block;
}

.btn-block {
  width: 100%;
}

.btn-outline-danger {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--danger);
}

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

.blur-locked {
  filter: blur(12px);
  pointer-events: none;
  user-select: none;
}

/* Utilities */
.hidden { display: none !important; }
.margin-top-sm { margin-top: 0.5rem; }
.margin-bottom-sm { margin-bottom: 0.75rem; }
.margin-top-lg { margin-top: 1.75rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }