/* ==========================================================================
   Medical Notes Portal - Premium Modern Design
   ========================================================================== */

:root {
  --primary-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --accent-blue: #2563eb;
  --accent-hover: #1d4ed8;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --radius-lg: 16px;
  --radius-md: 10px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
}

/* Navbar */
.navbar {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 16px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.navbar .brand {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(90deg, #1e293b, #2563eb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Container */
.container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 20px;
}

/* Split Login Screen Layout */
.login-page-container {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.split-login-card {
  display: flex;
  width: 100%;
  max-width: 950px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
}

/* Left Login Column */
.login-section {
  width: 380px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #ffffff;
}

.login-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.login-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* Right Advertisement Column */
.ad-section {
  flex: 1;
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.ad-badge {
  display: inline-block;
  background: rgba(37, 99, 235, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #93c5fd;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.ad-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ad-description {
  font-size: 0.95rem;
  color: #94a3b8;
  margin-bottom: 24px;
}

.ad-features {
  list-style: none;
  margin-bottom: 24px;
}

.ad-features li {
  font-size: 0.9rem;
  color: #e2e8f0;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ad-footer {
  font-size: 0.8rem;
  color: #64748b;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 16px;
}

/* Vertical Form Inputs */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: all 0.2s ease;
  background: #f8fafc;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-blue);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  text-align: center;
}

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

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

/* Course & Note List Cards */
.card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.list-group {
  list-style: none;
}

.list-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s ease;
}

.list-item:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.alert {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* Responsive adjustment for small screens */
@media (max-width: 768px) {
  .split-login-card {
    flex-direction: column;
  }
  .login-section {
    width: 100%;
  }
  .ad-section {
    padding: 30px;
  }
}