/* ═══════════════════════════════════════════
   AxLens Design System — Core
   ═══════════════════════════════════════════ */

/* ── 1. Custom Properties ─────────────────── */
:root {
  --bg-primary: #0b0b11;
  --bg-secondary: #13131d;
  --bg-elevated: #1a1a2e;
  --bg-glass: rgba(255,255,255,0.04);
  --bg-glass-hover: rgba(255,255,255,0.07);
  --accent: #00d4aa;
  --accent-hover: #00f0c0;
  --accent-subtle: rgba(0,212,170,0.10);
  --accent-glow: rgba(0,212,170,0.25);
  --text-primary: #f0f0f5;
  --text-secondary: #9a9ab0;
  --text-tertiary: #5a5a72;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.14);
  --border-accent: rgba(0,212,170,0.3);
  --danger: #ff4d6a;
  --danger-subtle: rgba(255,77,106,0.12);
  --warning: #ffb347;
  --success: #00d4aa;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --transition: 200ms ease;
  --transition-slow: 400ms ease;
  --nav-height: 64px;
  --container: 1120px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-primary: #f4f5f9;
  --bg-secondary: #ffffff;
  --bg-elevated: #e9eaf0;
  --bg-glass: rgba(255,255,255,0.75);
  --bg-glass-hover: rgba(255,255,255,0.85);
  --accent: #009e80;
  --accent-hover: #00b894;
  --accent-subtle: rgba(0,158,128,0.08);
  --accent-glow: rgba(0,158,128,0.18);
  --text-primary: #1a1a2e;
  --text-secondary: #5a5a72;
  --text-tertiary: #9a9ab0;
  --border: rgba(0,0,0,0.08);
  --border-hover: rgba(0,0,0,0.14);
  --border-accent: rgba(0,158,128,0.25);
  --danger: #e63950;
  --danger-subtle: rgba(230,57,80,0.08);
  --warning: #e09620;
  --success: #009e80;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 20px var(--accent-glow);
  color-scheme: light;
}

/* ── 2. Reset ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 24px); }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; font-size: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
fieldset { border: none; padding: 0; margin: 0; min-inline-size: 0; }

/* ── 3. Typography ────────────────────────── */
h1, h2, h3, h4, h5, h6 { line-height: 1.2; letter-spacing: -0.02em; color: var(--text-primary); font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.1rem; }
p { color: var(--text-secondary); }
.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

/* ── 4. Layout ────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; width: 100%; }
.section { padding: 80px 0; }
.section + .section { border-top: 1px solid var(--border); }
.page-wrapper { padding-top: var(--nav-height); min-height: 100vh; display: flex; flex-direction: column; }
.page-wrapper > main { flex: 1; }

/* ── 5. Skip Link ─────────────────────────── */
.skip-link {
  position: fixed; top: -100%; left: 16px; z-index: 10000;
  background: var(--accent); color: #0b0b11; padding: 8px 16px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.875rem;
  transition: top var(--transition);
}
.skip-link:focus { top: 8px; outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── 6. Navigation ────────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height);
  background: rgba(11,11,17,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  display: flex;
  align-items: center;
  padding: 0 24px;
  max-width: 100%;
}
[data-theme="light"] .site-header { background: rgba(244,245,249,0.85); }

/* Logo block — sits at far left */
.brand-logo {
  flex-shrink: 0;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.nav-logo img { height: 32px; width: 32px; border-radius: 6px; }
.nav-logo span { font-weight: 700; font-size: 1.15rem; color: var(--text-primary); letter-spacing: -0.02em; }

/* Nav container — holds links + theme toggle, pushed to the right */
.nav-container {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  height: 100%;
}

.nav-links {
  display: flex; align-items: center; gap: 8px;
}
.nav-links a, .nav-links button {
  padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 500;
  color: var(--text-secondary); transition: all var(--transition); white-space: nowrap;
}
.nav-links a:hover, .nav-links button:hover { color: var(--text-primary); background: var(--bg-glass-hover); }
.nav-links a[aria-current="page"] { color: var(--accent); background: var(--accent-subtle); }
.nav-auth-guest, .nav-auth-user { display: none; align-items: center; gap: 8px; }
body.is-guest .nav-auth-guest { display: flex; }
body.is-user .nav-auth-user { display: flex; }

/* Hamburger toggle — hidden on desktop */
.nav-toggle {
  display: none; width: 36px; height: 36px;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px; border-radius: var(--radius-sm);
}
.nav-toggle span {
  width: 20px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: all var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-glass); border: 1px solid var(--border);
  transition: all var(--transition); font-size: 1.1rem; flex-shrink: 0;
}
.theme-toggle:hover { background: var(--bg-glass-hover); border-color: var(--border-hover); }

/* ── 7. Buttons ───────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem;
  transition: all var(--transition); border: 1px solid transparent; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary {
  background: var(--accent); color: #0b0b11; border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.btn-secondary {
  background: var(--bg-glass); color: var(--text-primary); border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-glass-hover); border-color: var(--border-hover); }
.btn-outline {
  background: transparent; color: var(--accent); border-color: var(--border-accent);
}
.btn-outline:hover { background: var(--accent-subtle); border-color: var(--accent); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-full { width: 100%; }
.btn:disabled, .btn.loading { opacity: 0.5; pointer-events: none; }
.btn.loading::after {
  content: ''; width: 14px; height: 14px; border: 2px solid transparent;
  border-top-color: currentColor; border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ── 8. Cards ─────────────────────────────── */
.card {
  background: var(--bg-glass); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition);
}
.card:hover { border-color: var(--border-hover); }
.card-glow:hover { box-shadow: var(--shadow-glow); border-color: var(--border-accent); }
.card-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--accent-subtle); display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 16px; color: var(--accent);
}

/* ── 9. Forms ─────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 6px;
}
.form-group label .required { color: var(--danger); margin-left: 2px; }
.form-input {
  width: 100%; padding: 11px 14px; background: var(--bg-elevated);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-primary); transition: all var(--transition);
  outline: none;
}
.form-input::placeholder { color: var(--text-tertiary); }
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-subtle); }
.form-input.error { border-color: var(--danger); box-shadow: 0 0 0 3px var(--danger-subtle); }
.form-input:disabled, .form-input[readonly] { opacity: 0.6; cursor: not-allowed; }
select.form-input { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239a9ab0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
textarea.form-input { resize: vertical; min-height: 100px; }
.form-error { font-size: 0.8rem; color: var(--danger); margin-top: 4px; display: none; }
.form-error.visible { display: block; }
.form-hint { font-size: 0.8rem; color: var(--text-tertiary); margin-top: 4px; }
.password-wrapper { position: relative; }
.password-wrapper .form-input { padding-right: 44px; }
.password-toggle {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--text-tertiary); cursor: pointer;
  padding: 4px 6px; border-radius: var(--radius-sm); font-size: 0.8rem;
}
.password-toggle:hover { color: var(--text-secondary); }
.form-alert {
  padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.875rem;
  margin-bottom: 20px; display: none; border: 1px solid;
}
.form-alert.visible { display: block; }
.form-alert.alert-error { background: var(--danger-subtle); border-color: var(--danger); color: var(--danger); }
.form-alert.alert-success { background: rgba(0,212,170,0.08); border-color: var(--accent); color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ── 10. Tables ───────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--border); }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table-wrap th {
  text-align: left; padding: 12px 16px; font-weight: 600; font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-tertiary); background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
.table-wrap td { padding: 10px 16px; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap tbody tr:hover { background: var(--bg-glass-hover); }
.table-wrap kbd {
  display: inline-block; padding: 2px 8px; background: var(--bg-elevated);
  border: 1px solid var(--border); border-radius: 4px; font-family: var(--font);
  font-size: 0.8rem; font-weight: 500; color: var(--text-primary);
}

/* ── 11. Footer ───────────────────────────── */
.site-footer {
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}
.footer-inner { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px;
}
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 12px; max-width: 320px; }
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); margin-bottom: 16px; }
.footer-col a { display: block; padding: 4px 0; color: var(--text-secondary); font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--text-tertiary); flex-wrap: wrap; gap: 8px;
}
.footer-bottom a { color: var(--accent); }

/* ── 12. Utilities ────────────────────────── */
.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; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mt-sm { margin-top: 8px; } .mt-md { margin-top: 16px; } .mt-lg { margin-top: 32px; }
.mb-sm { margin-bottom: 8px; } .mb-md { margin-bottom: 16px; } .mb-lg { margin-bottom: 32px; }
.gap-sm { gap: 8px; } .gap-md { gap: 16px; }
.flex { display: flex; } .flex-col { flex-direction: column; }
.items-center { align-items: center; } .justify-center { justify-content: center; }
.hidden { display: none !important; }

/* ── 13. Animations ───────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.animate-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .animate-in { opacity: 1; transform: none; }
}

/* ── 14. Focus styles ─────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
a:focus:not(:focus-visible), button:focus:not(:focus-visible) { outline: none; }

/* ── 15. Responsive ───────────────────────── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 640px) {
  .nav-toggle { display: flex; order: 3; }
  .site-header {
    flex-wrap: wrap;
  }
  .nav-container {
    position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0;
    flex-direction: column; align-items: stretch; padding: 16px;
    background: var(--bg-primary); border-top: 1px solid var(--border);
    transform: translateX(100%); transition: transform 0.3s ease;
    z-index: 999;
    margin-left: 0;
    height: auto;
  }
  .nav-container.open { transform: translateX(0); }
  .nav-links {
    flex-direction: column; align-items: stretch;
  }
  .nav-links a, .nav-links button { padding: 12px 16px; font-size: 1rem; border-radius: var(--radius-sm); }
  .nav-auth-guest, .nav-auth-user { flex-direction: column; }
  .theme-toggle { align-self: flex-start; margin-top: 8px; }
  .section { padding: 40px 0; }
}