:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #60a5fa;
  --color-secondary: #1e293b;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-error: #dc2626;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.07);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.16);
  --font-family: 'Cairo', 'IBM Plex Sans Arabic', 'Inter', sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: none;
  font-weight: 700;
  font-size: 15px;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35); }
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-1px); }

.btn-block { width: 100%; }

.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(15, 23, 42, 0.04);
  padding: 22px;
  transition: var(--transition);
}

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error { background: #fef2f2; color: var(--color-error); border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: var(--color-success); border: 1px solid #bbf7d0; }

.form-group { margin-bottom: 16px; text-align: right; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  font-family: inherit;
  font-size: 15px;
  transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.password-field { position: relative; }
.password-field input[type="password"],
.password-field input[type="text"] {
  padding-inline-end: 46px;
}
.password-toggle {
  position: absolute;
  inset-inline-end: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 17px;
  line-height: 1;
  padding: 8px;
  cursor: pointer;
  color: var(--color-muted);
  border-radius: 8px;
}
.password-toggle:hover { color: var(--color-text); background: #f1f5f9; }

/* Toast notifications */
.toast-container {
  position: fixed;
  bottom: 20px;
  inset-inline-end: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  background: var(--color-secondary);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  font-size: 14px;
  animation: toast-in 0.25s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, #eef1f4 25%, #e2e6ea 37%, #eef1f4 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}