:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --secondary: #64748b;
  --accent: #f59e0b;
  --background: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --error: #ef4444;
  --success: #22c55e;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--background);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.login-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: linear-gradient(135deg, #1e3a8a 0%, #172554 100%);
}

.login-card {
  background: var(--surface);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.logo-wrapper {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  max-width: 120px;
  margin-bottom: 1rem;
}

.institute-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

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

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
}

input:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.btn {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn:hover {
  background-color: #1a365d;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.form-footer {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.form-footer a {
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 500;
}

.error-message {
  background-color: #fef2f2;
  color: var(--error);
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: none;
}

/* Global Header */
.global-header {
  background: white;
  padding: 0.75rem 2rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-logo {
  height: 40px;
}

.header-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.025em;
}

.user-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.user-info {
  text-align: right;
  line-height: 1.25;
}

.user-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.logout-btn {
  color: var(--error);
  text-decoration: none;
  font-size: 1.1rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  padding: 0.5rem;
  border-radius: 50%;
}

.logout-btn:hover {
  background: #fef2f2;
  transform: scale(1.1);
}

/* Page Containers */
.page-container {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.back-nav {
  margin-bottom: 2rem;
}

.back-link {
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  transition: transform 0.2s;
}

.back-link:hover {
  transform: translateX(-4px);
}