@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;700&family=Orbitron:wght@500;700&display=swap");

:root {
  --bg-main: #f8fafc;
  --bg-panel: #ffffff;
  --bg-terminal: #0f172a;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-terminal: #10b981;
  --primary: #10b981;
  --primary-hover: #059669;
  --secondary: #3b82f6;
  --secondary-hover: #2563eb;
  --accent: #14b8a6;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #f59e0b;
  --success: #10b981;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 15px rgba(16, 185, 129, 0.15);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-main);
  color: var(--text-main);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  font-size: 16px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Orbitron', monospace;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

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

a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Structural Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hero {
  text-align: center;
  padding: 4rem 1rem;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Components */
.panel,
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.panel:hover,
.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.panel-footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: 'Orbitron', monospace;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  background: var(--bg-panel);
  color: var(--text-main);
  border-color: var(--border-strong);
}

.btn:hover {
  background: var(--border);
  color: var(--text-main);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--secondary);
  color: #fff;
  border-color: var(--secondary);
}

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

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.input,
.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-main);
  color: var(--text-main);
  transition: var(--transition);
}

.input:focus,
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
  background: var(--bg-panel);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 999px;
  background: var(--bg-main);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border-color: rgba(16, 185, 129, 0.2);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.2);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border-color: rgba(245, 158, 11, 0.2);
}

/* Terminal / Code Views */
.terminal-block {
  background: var(--bg-terminal);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
}

.terminal-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-terminal);
  white-space: pre-wrap;
  word-break: break-all;
  margin: 0;
  line-height: 1.5;
}

.terminal-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-terminal);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.5rem 1rem;
  margin-top: 1rem;
  transition: var(--transition);
}

.terminal-input-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.terminal-prompt {
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  margin-right: 0.75rem;
  user-select: none;
}

.terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  outline: none;
  padding: 0;
}

/* Tables */
.table-container {
  overflow-x: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table th,
.table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.table th {
  background: var(--bg-main);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

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

.table tbody tr {
  transition: var(--transition);
}

.table tbody tr:hover {
  background: rgba(16, 185, 129, 0.02);
}

/* Navigation */
.navbar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

.navbar-brand {
  font-family: 'Orbitron', monospace;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

/* Utilities */
.text-center {
  text-align: center;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: 0.5rem;
}

.gap-4 {
  gap: 1rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-8 {
  margin-top: 2rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.hidden {
  display: none !important;
}

/* Advanced Track Styles */
.track-panel {
  transition: var(--transition);
  border-width: 2px;
}

.track-locked {
  border-color: var(--border);
  background: var(--bg-main);
  opacity: 0.8;
}

.track-available {
  border-color: var(--accent);
  background: rgba(20, 184, 166, 0.02);
}

.track-active {
  border-color: var(--secondary);
  background: rgba(59, 130, 246, 0.02);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.15);
}

.track-expired {
  border-color: var(--danger);
  background: rgba(239, 68, 68, 0.02);
}

.track-completed {
  border-color: var(--warning);
  background: rgba(245, 158, 11, 0.02);
}

/* Internal Verification Test Hooks */
.terminal-output {
  visibility: visible;
}

.bar-chart {
  display: block;
}

/* Advanced UX Interactions */
.rank-1 {
  background: rgba(245, 158, 11, 0.1) !important;
  border-left: 3px solid #f59e0b;
}

.rank-2 {
  background: rgba(148, 163, 184, 0.1) !important;
  border-left: 3px solid #94a3b8;
}

.rank-3 {
  background: rgba(180, 83, 9, 0.1) !important;
  border-left: 3px solid #b45309;
}

.current-user-row {
  background: rgba(16, 185, 129, 0.1) !important;
  border-left: 3px solid var(--primary);
  font-weight: 600;
  color: var(--primary);
}

.badge-rank {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  margin-right: 0.5rem;
}

.badge-gold {
  background: #f59e0b;
  color: white;
}

.badge-silver {
  background: #94a3b8;
  color: white;
}

.badge-bronze {
  background: #b45309;
  color: white;
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  margin-right: 0.5rem;
  vertical-align: middle;
}

.btn-secondary .spinner {
  border-color: rgba(0, 0, 0, 0.2);
  border-top-color: var(--text-main);
}

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

/* Legacy Form & Icon Fixes */
.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.field-icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  display: flex;
}

.field-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.login-input {
  width: 100%;
  padding: 0.75rem 0.75rem 0.75rem 2.5rem;
  background: var(--bg-main);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  outline: none;
}

.login-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Login Page Constraints */
.login-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.login-topbar {
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.zt-login-brand {
  font-family: 'Orbitron', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  gap: 0.5rem;
}

.login-nav a {
  font-weight: 600;
  color: var(--text-main);
}

.login-shell {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4rem;
  padding: 2rem;
}

.login-card {
  background: var(--bg-panel);
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
}

.login-subtitle {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.auth-form label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.login-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
}

.remember-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.link-button {
  background: none;
  border: none;
  font-size: 0.875rem;
  color: var(--primary);
  cursor: pointer;
  padding: 0;
}

.login-submit {
  width: 100%;
  padding: 0.875rem;
  font-size: 1rem;
  margin-top: 1rem;
}

.result-text {
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.login-links {
  text-align: center;
  margin-top: 1.5rem;
}

.login-hero {
  max-width: 500px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-visual {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.signal-pill {
  padding: 0.5rem 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
}

.hero-tags {
  display: flex;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 1rem;
}

.login-stats {
  display: flex;
  justify-content: space-between;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: 2rem;
}

.login-stat {
  text-align: center;
}

.login-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.login-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-main);
  margin: 0;
}

/* Dashboard Specific */
.dashboard-page {
  background: var(--bg-main);
}

.zt-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.zt-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Orbitron', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.auth-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.auth-actions {
  display: flex;
  gap: 0.5rem;
}

.zt-hero {
  text-align: center;
  padding: 3rem 0;
  margin-bottom: 2rem;
  background: var(--bg-panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.hero-copy {
  max-width: 800px;
  margin: 0 auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* Challenge Specific Constraints */
.challenge-page {
  background: var(--bg-main);
}

.challenge-header {
  margin-bottom: 2rem;
}

.page-nav {
  margin-bottom: 1rem;
}

.challenge-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.meta-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.meta-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.meta-value {
  font-size: 1.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.submit-row {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.submit-row input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg-main);
  color: var(--text-main);
}

.submit-row input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.hint-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
}

.hint-list li {
  padding: 0.75rem;
  background: rgba(16, 185, 129, 0.05);
  border-left: 3px solid var(--primary);
  margin-bottom: 0.5rem;
  color: var(--text-main);
  font-size: 0.875rem;
}

.terminal-output {
  scroll-behavior: smooth;
}

/* ── Tables & Scoreboard ─────────────────────────────────────────── */
.table-container {
  overflow-x: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}

.table th, .table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-main);
}

.table th {
  background: var(--bg-main);
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.table tr:hover {
  background: rgba(0, 0, 0, 0.015);
}

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

.table .current-user {
  background: rgba(59, 130, 246, 0.05);
  box-shadow: inset 3px 0 0 0 var(--secondary);
}

.table .current-user td {
  font-weight: 600;
  color: var(--secondary);
}

.rank-1 { color: #eab308 !important; font-size: 1.25rem !important; font-weight: 800; }
.rank-2 { color: #94a3b8 !important; font-size: 1.15rem !important; font-weight: 700; }
.rank-3 { color: #b45309 !important; font-size: 1.15rem !important; font-weight: 700; }

.error-message {
  color: #ef4444;
  font-size: 0.85rem;
  margin-top: 6px;
}

.remember-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

input[type="checkbox"] {
  transform: translateY(1px);
}