/* ═══════════════════════════════════════════════════════════
   نظام تصميم بوابة رسائل ماجستير طب الأسنان
   UST Design System
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@300;400;500;600;700&family=Cairo:wght@400;600;700&display=swap');

/* ─── CSS Variables ─── */
:root {
  /* Brand Identity */
  --primary: #0774BA;
  --secondary: #35B7F3;
  --surface: #FFFFFF;
  --background: #F8FBFF;
  --text-main: #0F172A;
  --text-muted: #64748b;
  --border-color: #D9EAF7;
  
  /* Status Colors */
  --success: #10B981;
  --success-bg: #D1FAE5;
  --warning: #F59E0B;
  --warning-bg: #FEF3C7;
  --error: #EF4444;
  --error-bg: #FEE2E2;

  /* Typography */
  --font-primary: 'IBM Plex Sans Arabic', 'Cairo', sans-serif;

  /* Spacing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-btn: 16px;
  --radius-card: 18px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows (Soft only) */
  --shadow-sm: 0 2px 4px rgba(7, 116, 186, 0.04);
  --shadow-md: 0 8px 16px rgba(7, 116, 186, 0.08);
  --shadow-lg: 0 16px 32px rgba(7, 116, 186, 0.12);

  /* Transitions */
  --transition: 0.3s ease;
}

/* ─── Reset & Base ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  direction: rtl;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--background);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

p { color: var(--text-muted); }

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

/* ─── Layout Grid (12 Columns) ─── */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding: 0 24px;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn i { width: 20px; height: 20px; }

.btn-primary {
  background: var(--primary);
  color: var(--surface);
  box-shadow: 0 4px 12px rgba(7, 116, 186, 0.2);
}
.btn-primary:hover {
  background: #06639F;
  transform: translateY(-2px);
  color: var(--surface);
  box-shadow: 0 6px 16px rgba(7, 116, 186, 0.3);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary, .btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover, .btn-outline:hover {
  background: var(--primary);
  color: var(--surface);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: var(--border-color);
  color: var(--primary);
}

.btn-full { width: 100%; }
.btn-sm { height: 40px; padding: 0 16px; font-size: 0.9rem; }

/* ─── Cards ─── */
.card {
  background: var(--surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--background);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

/* ─── Forms ─── */
.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-label .required { color: var(--error); }

.form-control {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--text-main);
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

textarea.form-control {
  height: auto;
  padding: 16px;
  resize: vertical;
  min-height: 120px;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(7, 116, 186, 0.1);
}

/* ─── Navigation Navbar ─── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img { height: 48px; width: auto; }

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-main);
  font-weight: 500;
}
.nav-links a:hover { color: var(--primary); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ─── Alerts ─── */
.alert {
  padding: 16px;
  border-radius: var(--radius-md);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.95rem;
}
.alert i { margin-top: 2px; }
.alert-warning { background: var(--warning-bg); color: #B45309; }
.alert-warning i { color: var(--warning); }
.alert-info { background: var(--border-color); color: var(--primary); }
.alert-info i { color: var(--primary); }
.alert-success { background: var(--success-bg); color: #047857; }
.alert-success i { color: var(--success); }

/* ─── Footer ─── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: 60px;
}
.footer p { text-align: center; font-size: 0.9rem; }

/* Utilities */
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }