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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  font-size: var(--text-base);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
ul, ol { list-style: none; }

::selection { background: var(--color-primary-soft); color: var(--color-primary-dark); }

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { color: var(--color-ink-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
}

.section-heading { text-align: center; max-width: var(--container-narrow); margin-inline: auto; }
.section-heading h2 { margin-block: var(--space-3) var(--space-3); }
.section-heading p { font-size: var(--text-lg); }

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section { padding-block: var(--space-24); }
.section--tight { padding-block: var(--space-16); }
.section--alt { background: var(--color-surface-alt); }

.stack { display: flex; flex-direction: column; }
.cluster { display: flex; align-items: center; flex-wrap: wrap; }
.grid { display: grid; gap: var(--space-6); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(246, 248, 247, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-ink);
  flex-shrink: 0;
}
.brand__mark {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand__mark img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-1);
  border-radius: var(--radius-full);
}
.nav-link {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-ink); background: var(--color-surface-alt); }
.nav-link.is-active { background: var(--color-primary); color: #fff; }

.header-actions { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

.lang-switch {
  display: flex;
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}
.lang-switch button {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-ink-faint);
  transition: all var(--duration-fast) var(--ease-standard);
}
.lang-switch button.is-active { background: var(--color-ink); color: #fff; }

.user-menu { position: relative; }
.user-menu__trigger {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3) var(--space-1) var(--space-1);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 600;
}
.user-menu__avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--text-xs); font-weight: 700;
  flex-shrink: 0;
}
.user-menu__dropdown {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + var(--space-3));
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  display: none;
  flex-direction: column;
  gap: 2px;
}
.user-menu.is-open .user-menu__dropdown { display: flex; }
.user-menu__dropdown a, .user-menu__dropdown button {
  display: block;
  width: 100%;
  text-align: start;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
}
.user-menu__dropdown a:hover, .user-menu__dropdown button:hover { background: var(--color-surface-alt); }
.user-menu__dropdown .danger { color: var(--color-danger); }

.mobile-nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mobile-nav-panel {
  display: none;
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-6);
  overflow-y: auto;
}
.mobile-nav-panel.is-open { display: block; }
.mobile-nav-panel .nav-link {
  display: block;
  padding: var(--space-4);
  font-size: var(--text-lg);
  text-align: start;
  border-radius: var(--radius-md);
}

@media (max-width: 860px) {
  .main-nav { display: none; }
  .mobile-nav-toggle { display: flex; }
  .header-actions .lang-switch { display: none; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard),
              background var(--duration-fast) var(--ease-standard),
              opacity var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }

.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover:not(:disabled) { background: var(--color-accent-dark); box-shadow: var(--shadow-accent); }

.btn-outline { background: var(--color-surface); color: var(--color-ink); border-color: var(--color-border); }
.btn-outline:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-primary); }

.btn-ghost { background: transparent; color: var(--color-ink-soft); }
.btn-ghost:hover:not(:disabled) { background: var(--color-surface-alt); color: var(--color-ink); }

.btn-danger-ghost { background: transparent; color: var(--color-danger); }
.btn-danger-ghost:hover:not(:disabled) { background: var(--color-danger-soft); }

.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-sm); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-lg); }
.btn-block { width: 100%; }
.btn-icon { padding: var(--space-3); aspect-ratio: 1; border-radius: var(--radius-full); }

.btn.is-loading { pointer-events: none; position: relative; color: transparent; }
.btn.is-loading .btn-label { opacity: 0; }
.btn .spinner { display: none; }
.btn.is-loading .spinner {
  display: block; position: absolute;
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
}
.btn-outline.is-loading .spinner, .btn-ghost.is-loading .spinner {
  border-color: var(--color-border);
  border-top-color: var(--color-primary);
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); margin-block-end: var(--space-5); }
.form-label { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink); }
.form-label .optional { font-weight: 400; color: var(--color-ink-faint); }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-base);
  color: var(--color-ink);
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--color-ink-faint); }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
}
.form-input.has-error, .form-textarea.has-error { border-color: var(--color-danger); }
.form-input.has-error:focus, .form-textarea.has-error:focus { box-shadow: 0 0 0 4px var(--color-danger-soft); }

.form-textarea { resize: vertical; min-height: 100px; }
.form-error-text { font-size: var(--text-xs); color: var(--color-danger); min-height: 1em; }
.form-hint { font-size: var(--text-xs); color: var(--color-ink-faint); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-16) var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-block-end: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand { display: flex; align-items: center; gap: var(--space-3); color: #fff; font-weight: 700; font-size: var(--text-lg); margin-block-end: var(--space-4); }
.footer-col h4 { color: #fff; font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.06em; margin-block-end: var(--space-4); }
.footer-col a, .footer-col p { display: block; font-size: var(--text-sm); margin-block-end: var(--space-3); color: rgba(255,255,255,0.65); }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-block-start: var(--space-6);
  font-size: var(--text-xs);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-socials { display: flex; gap: var(--space-3); }
.footer-socials a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
}
.footer-socials a:hover { background: var(--color-primary); }

@media (max-width: 640px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-2xl); }
  .section { padding-block: var(--space-16); }
}

/* Directional icons (arrows/chevrons) need an explicit flip in RTL —
   logical CSS properties don't reach into SVG path data. */
[dir="rtl"] .flip-rtl svg { transform: scaleX(-1); }