/* ESCP Vibe Coding Classroom Auth Styles */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg: #0f172a;
  --card-bg: #1e293b;
  --card-border: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --danger: #ef4444;
  --danger-bg: #450a0a;
  --danger-border: #7f1d1d;
  --warning: #f59e0b;
  --warning-bg: #451a03;
  --warning-border: #78350f;
  --success: #10b981;
  --success-bg: #064e3b;
  --success-border: #047857;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-container {
  width: 100%;
  max-width: 480px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 36px 32px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
}

.brand-header {
  text-align: center;
  margin-bottom: 28px;
}

.brand-badge {
  display: inline-block;
  background: rgba(37, 99, 235, 0.15);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.2);
  margin-bottom: 12px;
}

.brand-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.brand-subtitle {
  font-size: 14px;
  color: var(--text-muted);
}

/* Alerts */
.alert {
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.4;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.alert-danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: #fecaca;
}

.alert-warning {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: #fde68a;
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: #a7f3d0;
}

/* Tabs */
.auth-tabs {
  display: flex;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 24px;
  border: 1px solid var(--card-border);
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.tab-btn.active {
  background: var(--card-bg);
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Forms */
.form-panel {
  display: none;
}

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

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  background: #0f172a;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.pin-input {
  letter-spacing: 6px;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  font-family: monospace;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: #334155;
  color: var(--text-main);
  margin-top: 10px;
}

.btn-secondary:hover {
  background: #475569;
}

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

.btn-danger:hover {
  background: #dc2626;
}

/* Takeover card */
.device-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 16px;
  margin: 20px 0;
}

.device-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}

.device-row:last-child {
  margin-bottom: 0;
}

.device-label {
  color: var(--text-muted);
}

.device-val {
  font-weight: 600;
  color: var(--text-main);
}

.auth-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}