/* ============================================================
   CVFlow — Base Styles & Reset
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--brand-primary); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--brand-primary-dark); }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

p { color: var(--text-secondary); line-height: 1.7; }

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

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --- Layout Utilities --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section-padding {
  padding: var(--space-24) 0;
}

/* --- Flex & Grid Utilities --- */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* --- Visually Hidden (accessibility) --- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- Skeleton Loading --- */
@keyframes skeleton-shimmer {
  from { background-position: -400px 0; }
  to { background-position: 400px 0; }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--border-subtle) 50%, var(--bg-elevated) 75%);
  background-size: 800px 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  min-width: 280px;
  animation: toastIn 0.3s var(--transition-spring);
}

.toast.toast--success { border-left-color: var(--brand-success); }
.toast.toast--error { border-left-color: var(--brand-accent); }
.toast.toast--warning { border-left-color: var(--brand-warning); }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(110%); opacity: 0; }
}

/* --- Page transitions --- */
.page-enter { animation: pageEnter 0.4s ease forwards; }

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- RTL Support --- */
[dir="rtl"] {
  font-family: var(--font-arabic), var(--font-sans);
}

/* --- Text Gradient Utility --- */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Responsive Typography */
@media (max-width: 768px) {
  html { font-size: 15px; }
  .section-padding { padding: var(--space-16) 0; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .section-padding { padding: var(--space-12) 0; }
}