/* ════════════════════════════════════════════════════════════════════
   SHARED UI · Apple-inspired design system
   Loaded LAST on every page so it overrides legacy styles.
   Same file used by the main aitext2wordconverter site AND SlideGenius
   so they look + feel identical.
   ════════════════════════════════════════════════════════════════════ */

/* ── Design tokens ─────────────────────────────────────────────── */
:root {
  /* Type — Inter for UI + SF Pro fallbacks for native macOS/iOS feel */
  --ui-font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
             'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --ui-font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
                     'Segoe UI', sans-serif;

  /* Refined neutral palette */
  --ui-bg:           #FBFBFD;       /* Apple's near-white page bg */
  --ui-surface:      #FFFFFF;       /* card surface */
  --ui-surface-2:    #F5F5F7;       /* subtle alt surface */
  --ui-surface-3:    #EFEFF2;       /* deeper alt (hover bg) */
  --ui-border:       rgba(0,0,0,.08);
  --ui-border-strong:rgba(0,0,0,.14);
  --ui-divider:      rgba(0,0,0,.06);

  /* Text — high contrast, refined hierarchy */
  --ui-text:         #1D1D1F;       /* primary */
  --ui-text-2:       #515154;       /* secondary */
  --ui-text-3:       #86868B;       /* tertiary */
  --ui-text-on-dark: #FFFFFF;

  /* Brand — keep the existing blue/purple but with refined shades */
  --ui-brand:        #0071E3;       /* Apple-blue */
  --ui-brand-hover:  #0077ED;
  --ui-brand-dark:   #0058B0;
  --ui-brand-tint:   #E7F1FE;
  --ui-accent:       #FF7F50;       /* SlideGenius orange (preserved) */
  --ui-accent-dark:  #E8673A;
  --ui-violet:       #6B2FA0;       /* preserved purple */
  --ui-success:      #2BB673;
  --ui-warn:         #F0A03A;
  --ui-danger:       #DC3545;

  /* Geometry — softer, more consistent */
  --ui-radius-xs: 6px;
  --ui-radius:    10px;
  --ui-radius-lg: 14px;
  --ui-radius-xl: 20px;
  --ui-radius-2xl:28px;
  --ui-radius-pill:9999px;

  /* Shadows — layered, soft, Apple-like */
  --ui-shadow-1: 0 1px 2px rgba(0,0,0,.04), 0 1px 1px rgba(0,0,0,.03);
  --ui-shadow-2: 0 2px 4px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.06);
  --ui-shadow-3: 0 4px 8px rgba(0,0,0,.04), 0 12px 32px rgba(0,0,0,.08);
  --ui-shadow-4: 0 8px 16px rgba(0,0,0,.06), 0 24px 56px rgba(0,0,0,.10);
  --ui-shadow-focus: 0 0 0 4px rgba(0,113,227,.18);

  /* Motion — eased, never abrupt */
  --ui-ease: cubic-bezier(.4,0,.2,1);
  --ui-ease-out: cubic-bezier(.16,1,.3,1);
  --ui-t-fast: 140ms;
  --ui-t: 220ms;
  --ui-t-slow: 380ms;

  /* Spacing scale (8px base) */
  --ui-s1: 4px;  --ui-s2: 8px;  --ui-s3: 12px; --ui-s4: 16px;
  --ui-s5: 20px; --ui-s6: 24px; --ui-s7: 32px; --ui-s8: 40px;
  --ui-s9: 56px; --ui-s10:72px; --ui-s11:96px;

  /* Layout */
  --ui-page-max: 1180px;
  --ui-header-h: 64px;
  --ui-header-h-sm: 56px;
}

.dark-mode {
  --ui-bg:           #0B0B0F;
  --ui-surface:      #1A1A1F;
  --ui-surface-2:    #222228;
  --ui-surface-3:    #2C2C33;
  --ui-border:       rgba(255,255,255,.10);
  --ui-border-strong:rgba(255,255,255,.18);
  --ui-divider:      rgba(255,255,255,.07);
  --ui-text:         #F5F5F7;
  --ui-text-2:       #B6B6BB;
  --ui-text-3:       #6E6E73;
  --ui-brand:        #0A84FF;
  --ui-brand-hover:  #2196FF;
  --ui-brand-tint:   rgba(10,132,255,.16);
  --ui-shadow-1: 0 1px 2px rgba(0,0,0,.3);
  --ui-shadow-2: 0 4px 12px rgba(0,0,0,.36);
  --ui-shadow-3: 0 12px 32px rgba(0,0,0,.44);
  --ui-shadow-4: 0 24px 56px rgba(0,0,0,.55);
}

/* ── Inter from Google Fonts (preconnected if not already) ───────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Body baseline ──────────────────────────────────────────────── */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, .main-app-layout {
  font-family: var(--ui-font) !important;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  color: var(--ui-text);
  background: var(--ui-bg);
  letter-spacing: -.005em;
}

img, video, svg, canvas { max-width: 100%; }

/* ── Selection ──────────────────────────────────────────────────── */
::selection { background: var(--ui-brand-tint); color: var(--ui-text); }

/* ── Scrollbar (subtle, Apple-style) ────────────────────────────── */
* { scrollbar-width: thin; scrollbar-color: rgba(0,0,0,.18) transparent; }
.dark-mode * { scrollbar-color: rgba(255,255,255,.2) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,.18); border-radius: 99px; border: 2px solid transparent; background-clip: padding-box; }
.dark-mode ::-webkit-scrollbar-thumb { background: rgba(255,255,255,.22); background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,.28); background-clip: padding-box; }

/* ── Focus rings (visible only on keyboard nav) ─────────────────── */
:focus-visible {
  outline: none !important;
  box-shadow: var(--ui-shadow-focus) !important;
  border-radius: var(--ui-radius-xs);
}
button, a, input, textarea, select { outline: none; }

/* ── Type rhythm (overrides legacy h1-h4 sizes for consistency) ─── */
h1, .ui-h1 { font-family: var(--ui-font-display); font-weight: 800;
  letter-spacing: -.025em; line-height: 1.08; }
h2, .ui-h2 { font-family: var(--ui-font-display); font-weight: 800;
  letter-spacing: -.020em; line-height: 1.12; }
h3, .ui-h3 { font-family: var(--ui-font-display); font-weight: 700;
  letter-spacing: -.015em; line-height: 1.20; }
h4, .ui-h4 { font-weight: 700; letter-spacing: -.010em; line-height: 1.30; }
p { line-height: 1.6; }

/* ── Header (unified across both sites) ─────────────────────────── */
.main-header, .ui-header {
  background: rgba(255,255,255,.78) !important;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--ui-border) !important;
  box-shadow: none !important;
  padding: 0 max(20px, 4vw) !important;
  height: var(--ui-header-h);
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
  transition: background var(--ui-t) var(--ui-ease);
}
.dark-mode .main-header,
.dark-mode .ui-header { background: rgba(20,20,24,.72) !important; }

.main-header .site-title,
.main-header .site-title a {
  font-family: var(--ui-font-display) !important;
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  color: var(--ui-text) !important;
  letter-spacing: -.015em !important;
  text-decoration: none !important;
}
.main-header .site-logo { width: 32px !important; height: 32px !important;
  border-radius: 8px !important; }

/* Header nav links — refined chip style */
.main-header .nav-link,
.main-header .home-link {
  color: var(--ui-text-2) !important;
  font-weight: 500 !important;
  font-size: .9rem !important;
  padding: 6px 12px !important;
  border-radius: var(--ui-radius-xs) !important;
  transition: color var(--ui-t-fast) var(--ui-ease), background var(--ui-t-fast) var(--ui-ease) !important;
  text-decoration: none !important;
  border: none !important;
  background: transparent !important;
}
.main-header .nav-link:hover,
.main-header .home-link:hover {
  color: var(--ui-text) !important;
  background: var(--ui-surface-3) !important;
  text-decoration: none !important;
}

/* ── Buttons (a unified set used by both sites) ─────────────────── */
.btn-login, .btn-signup, .btn-account,
button.btn-primary, button.btn-outline,
.ui-btn, .ui-btn-primary, .ui-btn-outline {
  font-family: var(--ui-font) !important;
  font-weight: 600 !important;
  font-size: .9rem !important;
  letter-spacing: -.005em !important;
  border-radius: var(--ui-radius-pill) !important;
  padding: 8px 18px !important;
  cursor: pointer !important;
  transition: transform var(--ui-t-fast) var(--ui-ease),
              background var(--ui-t-fast) var(--ui-ease),
              box-shadow var(--ui-t-fast) var(--ui-ease),
              color var(--ui-t-fast) var(--ui-ease),
              border-color var(--ui-t-fast) var(--ui-ease) !important;
  display: inline-flex !important;
  align-items: center; justify-content: center;
  gap: 6px;
  border: 1px solid transparent !important;
  line-height: 1.2 !important;
}

.btn-login, .ui-btn-outline {
  background: transparent !important;
  color: var(--ui-brand) !important;
  border-color: var(--ui-brand) !important;
  box-shadow: none !important;
}
.btn-login:hover, .ui-btn-outline:hover {
  background: var(--ui-brand-tint) !important;
  transform: none !important;
}

.btn-signup, .ui-btn-primary,
button.btn-primary {
  background: var(--ui-brand) !important;
  color: #fff !important;
  border-color: var(--ui-brand) !important;
  box-shadow: var(--ui-shadow-1) !important;
}
.btn-signup:hover, .ui-btn-primary:hover,
button.btn-primary:hover {
  background: var(--ui-brand-hover) !important;
  border-color: var(--ui-brand-hover) !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 6px 16px rgba(0,113,227,.32) !important;
}

button.btn-outline {
  background: var(--ui-surface) !important;
  color: var(--ui-text) !important;
  border-color: var(--ui-border-strong) !important;
}
button.btn-outline:hover {
  background: var(--ui-surface-3) !important;
  border-color: var(--ui-text-3) !important;
  transform: none !important;
}

.btn-account {
  background: var(--ui-surface-2) !important;
  color: var(--ui-text-2) !important;
  border-color: var(--ui-border) !important;
}
.btn-account:hover {
  color: var(--ui-text) !important;
  background: var(--ui-surface-3) !important;
}

/* Primary CTA pill — extra-large variant for hero */
.btn-hero-primary, .ui-cta-primary {
  background: var(--ui-text) !important;
  color: #fff !important;
  padding: 14px 32px !important;
  font-weight: 700 !important;
  font-size: 1rem !important;
  border-radius: var(--ui-radius-pill) !important;
  border: none !important;
  box-shadow: var(--ui-shadow-2) !important;
  cursor: pointer !important;
  transition: transform var(--ui-t-fast) var(--ui-ease), box-shadow var(--ui-t-fast) var(--ui-ease), background var(--ui-t-fast) var(--ui-ease) !important;
}
.btn-hero-primary:hover, .ui-cta-primary:hover {
  background: #000 !important;
  transform: translateY(-2px) !important;
  box-shadow: var(--ui-shadow-3) !important;
}
.dark-mode .btn-hero-primary, .dark-mode .ui-cta-primary {
  background: #fff !important; color: #000 !important;
}
.dark-mode .btn-hero-primary:hover, .dark-mode .ui-cta-primary:hover {
  background: #f5f5f7 !important; color: #000 !important;
}

.btn-hero-secondary, .ui-cta-secondary {
  background: var(--ui-surface) !important;
  color: var(--ui-text) !important;
  border: 1px solid var(--ui-border-strong) !important;
  padding: 14px 26px !important;
  font-weight: 600 !important;
  font-size: 1rem !important;
  border-radius: var(--ui-radius-pill) !important;
  cursor: pointer !important;
  transition: transform var(--ui-t-fast) var(--ui-ease), background var(--ui-t-fast) var(--ui-ease) !important;
}
.btn-hero-secondary:hover, .ui-cta-secondary:hover {
  background: var(--ui-surface-3) !important;
  transform: translateY(-1px) !important;
}

/* ── Form inputs — unified ────────────────────────────────────── */
.form-input, input[type="text"], input[type="email"], input[type="password"],
input[type="search"], input[type="number"], input[type="url"],
input[type="tel"], textarea, select {
  font-family: var(--ui-font);
  font-size: .95rem;
  color: var(--ui-text);
  background: var(--ui-surface);
  border: 1px solid var(--ui-border-strong);
  border-radius: var(--ui-radius);
  padding: 12px 14px;
  transition: border-color var(--ui-t-fast) var(--ui-ease),
              box-shadow var(--ui-t-fast) var(--ui-ease);
  width: 100%;
  box-sizing: border-box;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--ui-brand) !important;
  box-shadow: var(--ui-shadow-focus) !important;
  outline: none !important;
}
input::placeholder, textarea::placeholder { color: var(--ui-text-3); }

/* ── Cards & surfaces (a single consistent treatment) ──────────── */
.glass-card,
.ui-card,
.tpl-card, .demo-card,
.cap-card, .flag-card,
.wizard-card {
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-1) !important;
  transition: transform var(--ui-t) var(--ui-ease),
              box-shadow var(--ui-t) var(--ui-ease),
              border-color var(--ui-t) var(--ui-ease) !important;
}
.glass-card:hover, .ui-card.is-interactive:hover,
.demo-card:hover, .cap-card:hover, .flag-card:hover {
  transform: translateY(-3px) !important;
  box-shadow: var(--ui-shadow-3) !important;
  border-color: var(--ui-border-strong) !important;
}

/* ── Modal / dialog refinement ─────────────────────────────────── */
.modal-overlay, .payment-modal {
  background: rgba(0,0,0,.42) !important;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.modal-box, .payment-content {
  border-radius: var(--ui-radius-xl) !important;
  box-shadow: var(--ui-shadow-4) !important;
  border: 1px solid var(--ui-border) !important;
}

/* ── Footer (unified) ──────────────────────────────────────────── */
.main-footer, .sf-footer {
  background: var(--ui-text) !important;
  color: rgba(255,255,255,.8) !important;
  padding: var(--ui-s9) max(20px, 4vw) var(--ui-s6) !important;
  font-size: .88rem;
}
.main-footer a, .sf-footer a {
  color: rgba(255,255,255,.66) !important;
  transition: color var(--ui-t-fast) var(--ui-ease) !important;
}
.main-footer a:hover, .sf-footer a:hover { color: #fff !important; }
.main-footer h4, .sf-footer h4 {
  color: #fff !important;
  font-family: var(--ui-font-display) !important;
  font-weight: 700 !important;
  font-size: .9rem !important;
  letter-spacing: -.005em !important;
  margin-bottom: var(--ui-s4) !important;
  text-transform: none !important;
}

/* ── Toasts ─────────────────────────────────────────────────────── */
.toast, #toast {
  background: rgba(20,20,24,.94) !important;
  color: #fff !important;
  border-radius: var(--ui-radius) !important;
  padding: 12px 18px !important;
  font-weight: 500 !important;
  font-size: .9rem !important;
  box-shadow: var(--ui-shadow-3) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ── Banners ────────────────────────────────────────────────────── */
.global-conversion-banner {
  background: var(--ui-surface-2) !important;
  color: var(--ui-text-2) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius-pill) !important;
  padding: 8px 18px !important;
  font-size: .82rem !important;
  font-weight: 500 !important;
  margin: var(--ui-s4) auto !important;
  display: inline-flex !important;
  align-items: center; gap: 8px;
  width: auto !important; max-width: 600px;
}

/* ── Language selector chip ───────────────────────────────────── */
.lang-btn {
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border-strong) !important;
  border-radius: var(--ui-radius-pill) !important;
  padding: 6px 12px !important;
  font-size: .85rem !important;
  color: var(--ui-text) !important;
  font-weight: 500 !important;
  display: inline-flex !important; align-items: center; gap: 6px;
  cursor: pointer;
  transition: background var(--ui-t-fast) var(--ui-ease), border-color var(--ui-t-fast) var(--ui-ease) !important;
}
.lang-btn:hover { background: var(--ui-surface-3) !important;
  border-color: var(--ui-text-3) !important; }
.lang-dropdown {
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-3) !important;
  padding: 6px !important;
}

/* ── Refined section spacing ───────────────────────────────────── */
/* Only apply the larger section padding to landing-page sections. The
   compact hero on the main aitext2word site uses its own tight spacing. */
section:not(.hero-section-compact):not(.glass-card):not(.compact-tip-section):not(.professional-troubleshooting-section) {
  padding: var(--ui-s10) max(20px, 4vw);
}
@media (max-width: 768px) {
  section:not(.hero-section-compact):not(.glass-card):not(.compact-tip-section):not(.professional-troubleshooting-section) {
    padding: var(--ui-s8) 20px;
  }
}

/* Hero section refinement (SlideGenius landing only — NOT the compact hero
   on home.html/index.html which has a single title and would otherwise
   render as a huge empty area). */
.hero {
  background: linear-gradient(180deg, var(--ui-bg) 0%, var(--ui-surface-2) 100%) !important;
  min-height: 70vh !important;
}
.hero-title {
  font-family: var(--ui-font-display) !important;
  font-size: clamp(2rem, 5.5vw, 4rem) !important;
  font-weight: 900 !important;
  letter-spacing: -.030em !important;
  line-height: 1.05 !important;
  color: var(--ui-text) !important;
}
.hero-sub {
  font-size: clamp(1rem, 1.7vw, 1.18rem) !important;
  line-height: 1.55 !important;
  color: var(--ui-text-2) !important;
  font-weight: 400 !important;
}

/* SlideGenius hero override — keep the gradient but Apple-ify type */
.hero { color: var(--ui-text); }
.hero .hero-title { color: var(--ui-text) !important; }
.hero .hero-title .hero-highlight {
  background: linear-gradient(135deg, var(--ui-brand) 0%, var(--ui-violet) 80%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent !important;
}
.hero .hero-sub { color: var(--ui-text-2) !important; }
.hero .hero-badge {
  background: rgba(255,255,255,.6) !important;
  color: var(--ui-text-2) !important;
  border: 1px solid var(--ui-border) !important;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  font-weight: 600 !important;
}
.hero .trust-item { color: var(--ui-text-2) !important; font-weight: 500 !important; }
.hero .trust-item .trust-icon {
  background: var(--ui-brand-tint) !important; color: var(--ui-brand) !important;
}

/* Blobs were designed for the original dark hero gradient. On the new light
   hero they need higher alpha to remain decorative without overpowering. */
.hero .hero-blob { mix-blend-mode: multiply; opacity: .35; }
.hero .blob1 { background: radial-gradient(circle, rgba(0,113,227,.18), transparent 70%) !important; }
.hero .blob2 { background: radial-gradient(circle, rgba(255,127,80,.16), transparent 70%) !important; }
.hero .blob3 { background: radial-gradient(circle, rgba(107,47,160,.16), transparent 70%) !important; }
.dark-mode .hero .hero-blob { mix-blend-mode: screen; opacity: .55; }

/* Floating hero badge — Apple chip refinement */
.hero-badge-float {
  background: rgba(255,255,255,.92) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--ui-border) !important;
  box-shadow: var(--ui-shadow-2) !important;
}

/* ── Mobile-first responsive overrides ──────────────────────────── */
@media (max-width: 1024px) {
  .main-header { padding: 0 20px !important; }
}
@media (max-width: 768px) {
  :root { --ui-header-h: var(--ui-header-h-sm); }
  .main-header { height: var(--ui-header-h-sm); padding: 0 16px !important; }
  .main-header .site-title,
  .main-header .site-title a { font-size: .95rem !important; }
  .main-header .home-text,
  .main-header .lang-name { display: none !important; }
  .main-header .nav-link { padding: 6px 8px !important; font-size: .82rem !important; }
  .btn-login, .btn-signup { padding: 7px 14px !important; font-size: .82rem !important; }

  /* Footer: stack columns */
  .main-footer-grid, .sf-footer-inner {
    grid-template-columns: 1fr !important;
    gap: var(--ui-s6) !important;
  }

  /* Cards take full width on phone */
  .glass-card, .ui-card,
  .professional-troubleshooting-section,
  .articles-section {
    border-radius: var(--ui-radius-lg) !important;
    margin: var(--ui-s4) 16px !important;
    max-width: none !important;
    padding: var(--ui-s5) !important;
  }

  /* Composer + chat layout breathing room */
  body { font-size: 15px; }
  h1, .ui-h1 { font-size: clamp(1.7rem, 7vw, 2.6rem) !important; }
  h2, .ui-h2 { font-size: clamp(1.4rem, 5.5vw, 2.0rem) !important; }
  h3, .ui-h3 { font-size: clamp(1.2rem, 4.5vw, 1.6rem) !important; }
}
@media (max-width: 480px) {
  .main-header { padding: 0 12px !important; }
  .main-header .site-logo { width: 28px !important; height: 28px !important; }
  .main-header .site-title,
  .main-header .site-title a { font-size: .88rem !important; }
  .btn-hero-primary, .ui-cta-primary { padding: 12px 24px !important; font-size: .92rem !important; }
  .btn-hero-secondary, .ui-cta-secondary { padding: 12px 20px !important; font-size: .92rem !important; }
}

/* ── Reduce motion if user prefers ────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Touch targets — guarantee 44pt minimum on phones ─────────── */
@media (pointer: coarse) {
  button, a.nav-link, a.home-link, .lang-btn,
  .btn-login, .btn-signup, .btn-account,
  .ui-btn, .ui-btn-primary, .ui-btn-outline,
  input[type="checkbox"], input[type="radio"] {
    min-height: 44px;
  }
  textarea { min-height: 88px; }
}

/* ── SlideGenius-specific bridging (so it reads identically) ──── */
/* Map SlideGenius CSS variables onto the shared tokens */
body.body-app, .landing-view, #app-view {
  --brand: var(--ui-accent);
  --brand-dark: var(--ui-accent-dark);
  --blue: var(--ui-brand);
  --blue-dark: var(--ui-brand-dark);
  --blue-light: var(--ui-brand-tint);
  --purple: var(--ui-violet);
  --purple-mid: var(--ui-violet);
  --bg: var(--ui-bg);
  --surface: var(--ui-surface);
  --surface2: var(--ui-surface-2);
  --text: var(--ui-text);
  --text2: var(--ui-text-2);
  --text3: var(--ui-text-3);
  --border: var(--ui-border);
  --border2: var(--ui-border);
  --shadow-sm: var(--ui-shadow-1);
  --shadow: var(--ui-shadow-2);
  --shadow-lg: var(--ui-shadow-3);
  --radius: var(--ui-radius-lg);
  --radius-lg: var(--ui-radius-xl);
  --radius-sm: var(--ui-radius);
  --transition: var(--ui-t) var(--ui-ease);

  /* SlideGenius primary-action accent — matches the polished deck-action,
     quick-edit and slide-preview surfaces (all #1f5fae). Every primary
     control in the chat shell + landing draws from these tokens. */
  --sg-accent:              #1f5fae;
  --sg-accent-hover:        #1a4f93;
  --sg-accent-press:        #163f78;
  --sg-accent-soft:         #f2f6fc;   /* light tint bg (light mode) */
  --sg-accent-soft-press:   #e6eefb;   /* deeper tint (pressed ghost) */
  --sg-accent-border:       #cdd8e8;   /* secondary/outline border */
  --sg-accent-ring:         0 0 0 3px rgba(31,95,174,.35);
  --sg-accent-shadow:       0 6px 18px rgba(31,95,174,.30);
  --sg-accent-shadow-press: 0 3px 9px rgba(31,95,174,.28);
}
/* Dark-mode tints for the accent ghost/outline controls. The solid accent,
   ring + shadows read fine on dark; only the light tints need inverting. */
body.body-app.dark-mode, .dark-mode .landing-view, .dark-mode #app-view {
  --sg-accent-soft:       rgba(31,95,174,.22);
  --sg-accent-soft-press: rgba(31,95,174,.32);
  --sg-accent-border:     rgba(120,160,220,.32);
}

/* Sidebar (SlideGenius chat) refinement */
.app-sidebar {
  background: var(--ui-surface) !important;
  border-right: 1px solid var(--ui-border) !important;
}
.btn-newchat {
  background: var(--sg-accent) !important;
  color: #fff !important;
  border: none !important;
  border-radius: 12px !important;
  font-weight: 650 !important;
  transition: background var(--ui-t-fast) var(--ui-ease),
              transform var(--ui-t-fast) var(--ui-ease),
              box-shadow var(--ui-t-fast) var(--ui-ease) !important;
}
.btn-newchat:hover { background: var(--sg-accent-hover) !important; transform: translateY(-1px); box-shadow: var(--sg-accent-shadow); }
.btn-newchat:active { background: var(--sg-accent-press) !important; transform: translateY(0); box-shadow: var(--sg-accent-shadow-press); }
.btn-newchat:focus-visible { box-shadow: var(--sg-accent-ring) !important; }
.dark-mode .btn-newchat { background: var(--sg-accent) !important; color: #fff !important; }
.dark-mode .btn-newchat:hover { background: var(--sg-accent-hover) !important; }

/* Composer (SlideGenius chat) refinement — Apple/ChatGPT-style pill */
.composer-shell {
  border-radius: 24px !important;
  border: 1px solid var(--ui-border) !important;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 6px 24px rgba(0,0,0,.04) !important;
  background: var(--ui-surface) !important;
  padding: 6px 6px 6px 10px !important;
}
.composer-shell:focus-within {
  border-color: var(--sg-accent) !important;
  box-shadow: 0 0 0 4px rgba(31,95,174,.14), 0 8px 28px rgba(0,0,0,.10) !important;
}
.dark-mode .composer-shell:focus-within {
  border-color: var(--sg-accent) !important;
  box-shadow: 0 0 0 4px rgba(31,95,174,.28), 0 8px 28px rgba(0,0,0,.30) !important;
}
.btn-send {
  background: var(--sg-accent) !important;
  color: #fff !important;
  border-radius: 50% !important;
  padding: 0 !important;
  width: 32px !important;
  height: 32px !important;
  font-weight: 700 !important;
  font-size: 1rem !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  flex-shrink: 0 !important;
}
.btn-send:hover:not(:disabled) { background: var(--sg-accent-hover) !important; box-shadow: var(--sg-accent-shadow); transform: scale(1.06) !important; }
.btn-send:active:not(:disabled) { background: var(--sg-accent-press) !important; box-shadow: var(--sg-accent-shadow-press); transform: scale(.94) !important; }
.btn-send:focus-visible { box-shadow: var(--sg-accent-ring) !important; }
.btn-send:disabled { opacity: .4 !important; background: var(--ui-border) !important; color: var(--ui-text-3) !important; cursor: not-allowed !important; }
.dark-mode .btn-send { background: var(--sg-accent) !important; color: #fff !important; }
.dark-mode .btn-send:hover:not(:disabled) { background: var(--sg-accent-hover) !important; }
.dark-mode .btn-send:disabled { background: var(--ui-border) !important; color: var(--ui-text-3) !important; }

/* Chat message bubbles — bigger avatars, refined hierarchy */
.msg-ava {
  width: 36px !important; height: 36px !important;
  border-radius: 10px !important;
  font-size: .78rem !important;
  font-weight: 700 !important;
}
.msg-author {
  font-size: .76rem !important;
  font-weight: 700 !important;
  color: var(--ui-text-3) !important;
  letter-spacing: .04em !important;
}
.msg-content { color: var(--ui-text) !important; }

/* Sidebar history rows */
.hist-row {
  border-radius: 12px !important;
  padding: 10px 12px !important;
  border: 1px solid transparent !important;
  transition: background var(--ui-t-fast) var(--ui-ease),
              border-color var(--ui-t-fast) var(--ui-ease) !important;
}
.hist-row:hover { background: var(--ui-surface-2) !important; }
.hist-row:active { background: var(--ui-surface-3) !important; }
.hist-row:focus-visible { box-shadow: var(--sg-accent-ring) !important; }
.hist-row.hr-active {
  background: var(--sg-accent-soft) !important;
  border-color: var(--sg-accent-border) !important;
}
.hist-row.hr-active .hr-title { color: var(--sg-accent) !important; font-weight: 700 !important; }
.dark-mode .hist-row.hr-active .hr-title { color: #7fb0ec !important; }
.hist-row .hr-title { color: var(--ui-text) !important; font-weight: 600 !important; }
.hist-row .hr-meta { color: var(--ui-text-3) !important; }

/* Welcome state in chat — tighter, more Apple */
.welcome-title {
  font-family: var(--ui-font-display) !important;
  font-size: clamp(1.6rem, 3.6vw, 2.2rem) !important;
  font-weight: 800 !important;
  letter-spacing: -.020em !important;
}
.welcome-sub {
  color: var(--ui-text-2) !important;
  font-size: 1rem !important;
}
.wp-card {
  border-radius: var(--ui-radius-lg) !important;
  border: 1px solid var(--ui-border) !important;
  padding: 14px 16px !important;
  transition: border-color var(--ui-t-fast) var(--ui-ease), background var(--ui-t-fast) var(--ui-ease) !important;
  background: var(--ui-surface) !important;
}
.wp-card:hover {
  border-color: var(--ui-brand) !important;
  background: var(--ui-surface-2) !important;
  transform: none !important;
  box-shadow: var(--ui-shadow-2) !important;
}

/* Capability ads grid — Apple product-card look */
.cap-card {
  padding: var(--ui-s6) !important;
  gap: var(--ui-s3) !important;
}
.cap-icon {
  width: 44px !important; height: 44px !important;
  border-radius: var(--ui-radius) !important;
  background: var(--ui-brand-tint) !important;
  color: var(--ui-brand) !important;
  font-size: 1.3rem !important;
}
.cap-title {
  font-family: var(--ui-font-display) !important;
  font-weight: 700 !important;
  font-size: 1.02rem !important;
  letter-spacing: -.010em !important;
}
.cap-text { color: var(--ui-text-2) !important; font-size: .9rem !important; line-height: 1.55 !important; }
.cap-tag {
  background: var(--ui-surface-3) !important;
  color: var(--ui-text-2) !important;
  font-weight: 600 !important;
  font-size: .68rem !important;
  letter-spacing: .04em !important;
  text-transform: uppercase !important;
}

/* Flagship template teaser tiles */
.flag-card { border-radius: var(--ui-radius-lg) !important; }
.flag-name { font-family: var(--ui-font-display) !important;
  font-weight: 700 !important; letter-spacing: -.010em !important; }
.flag-shot::after {
  background: rgba(255,255,255,.92) !important;
  color: var(--ui-text) !important;
  font-weight: 800 !important;
}

/* Steps banner */
.steps-banner {
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-1) !important;
  padding: var(--ui-s5) var(--ui-s6) !important;
}
.step-num {
  background: var(--ui-brand) !important;
  border-radius: 50% !important;
  font-weight: 700 !important;
}
.step-text strong { color: var(--ui-text) !important; }
.step-text { color: var(--ui-text-2) !important; font-size: .88rem !important; }

/* Retention banner — refined */
.retention-banner {
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border-strong) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-1) !important;
  color: var(--ui-text-2) !important;
}
.retention-banner strong { color: var(--ui-accent) !important; }

/* ─────────────────────────────────────────────────────────────
   Apple-style mobile menu toggle (shared)
   For tight screens — a hamburger reveals navigation as a sheet
   ───────────────────────────────────────────────────────────── */
.ui-mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  background: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius) !important;
  color: var(--ui-text-2);
  align-items: center; justify-content: center;
  cursor: pointer;
}
@media (max-width: 640px) {
  .ui-mobile-toggle { display: inline-flex; }
}

/* ── Tactile press states (Apple-like haptic feel) ─────────── */
.btn-login:active, .btn-signup:active, .btn-account:active,
button.btn-primary:active, button.btn-outline:active,
.ui-btn:active, .ui-btn-primary:active, .ui-btn-outline:active,
.btn-hero-primary:active, .btn-hero-secondary:active,
.ui-cta-primary:active, .ui-cta-secondary:active,
.btn-send:active, .btn-newchat:active {
  transform: scale(.97) !important;
  transition-duration: 80ms !important;
}

/* ── Subtle entry animations for hero / nav (one-shot on load) ─── */
@keyframes ui-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-title, .main-title, .hero-sub, .hero-ctas, .hero-trust,
.welcome-state {
  animation: ui-fade-in 600ms var(--ui-ease-out) both;
}
.hero-sub { animation-delay: 60ms; }
.hero-ctas { animation-delay: 120ms; }
.hero-trust { animation-delay: 180ms; }

/* ── Refined details: link underlines, lists, kbd ──────────── */
a:not(.btn-login):not(.btn-signup):not(.btn-hero-primary):not(.btn-hero-secondary):not(.nav-link):not(.home-link):not(.hist-row):not(.btn-account):not(.flag-card):not(.demo-card) {
  color: var(--ui-brand);
  text-decoration: none;
  transition: color var(--ui-t-fast) var(--ui-ease);
}
a:not(.btn-login):not(.btn-signup):not(.btn-hero-primary):not(.btn-hero-secondary):not(.nav-link):not(.home-link):hover {
  color: var(--ui-brand-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

kbd, code {
  font-family: ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, 'Roboto Mono', monospace;
  font-size: .88em;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--ui-surface-3);
  color: var(--ui-text);
  border: 1px solid var(--ui-border);
}

/* ── Forms: refined check / radio / toggle ─────────────────── */
input[type="checkbox"], input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--ui-brand);
  cursor: pointer;
}

/* ── Tables — quiet, readable ──────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--ui-border);
}
th {
  font-weight: 700;
  color: var(--ui-text-2);
  background: var(--ui-surface-2);
  font-size: .82rem;
  letter-spacing: .02em;
  text-transform: uppercase;
}

/* ── Print stylesheet — clean output ───────────────────────── */
@media print {
  .main-header, .main-footer, .sf-footer, .app-sidebar,
  .modal-overlay, .payment-modal, .toast,
  .conv-ctx-bar, .composer-wrap {
    display: none !important;
  }
  body { background: #fff !important; color: #000 !important; }
}

/* ── Social proof stats bar (hero) ─────────────────────────── */
.social-proof {
  display: flex;
  align-items: center;
  gap: var(--ui-s5);
  margin: var(--ui-s5) 0 var(--ui-s6);
  padding: var(--ui-s4) var(--ui-s5);
  background: var(--ui-surface);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-lg);
  box-shadow: var(--ui-shadow-1);
  max-width: 520px;
  flex-wrap: wrap;
}
.sp-stat { display: flex; flex-direction: column; gap: 2px; }
.sp-big {
  font-family: var(--ui-font-display);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--ui-text);
  font-variant-numeric: tabular-nums;
}
.sp-live::before {
  content: '';
  display: inline-block;
  width: 7px; height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--ui-success);
  box-shadow: 0 0 0 0 rgba(43,182,115,.55);
  animation: sp-pulse 1.8s ease-in-out infinite;
  vertical-align: middle;
}
@keyframes sp-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(43,182,115,.55); }
  50%      { box-shadow: 0 0 0 6px rgba(43,182,115,0); }
}
.sp-label {
  font-size: .76rem;
  color: var(--ui-text-3);
  font-weight: 500;
}
.sp-divider {
  width: 1px;
  align-self: stretch;
  background: var(--ui-divider);
}
@media (max-width: 520px) {
  .social-proof { gap: var(--ui-s3); padding: var(--ui-s3) var(--ui-s4); }
  .sp-big { font-size: 1.2rem; }
}

/* ── Testimonials grid (landing) ───────────────────────────── */
.testimonials-section {
  padding: var(--ui-s10) max(20px, 4vw);
  background: var(--ui-surface);
}
.testimonials-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--ui-s5);
}
@media (max-width: 760px) { .testimonials-grid { grid-template-columns: 1fr; } }

.testimonial {
  background: var(--ui-surface-2);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-lg);
  padding: var(--ui-s6);
  margin: 0;
  transition: transform var(--ui-t) var(--ui-ease), box-shadow var(--ui-t) var(--ui-ease);
}
.testimonial:hover { transform: translateY(-3px); box-shadow: var(--ui-shadow-3); }
.testimonial blockquote {
  margin: 0 0 var(--ui-s4);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ui-text);
  font-weight: 500;
  letter-spacing: -.005em;
}
.testimonial blockquote::before {
  content: '"';
  display: block;
  font-family: Georgia, serif;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--ui-brand);
  margin-bottom: var(--ui-s2);
}
.testimonial figcaption {
  display: flex; align-items: center; gap: var(--ui-s3);
}
.t-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  font-size: .82rem;
  display: inline-flex;
  align-items: center; justify-content: center;
  flex-shrink: 0;
}
.t-meta { display: flex; flex-direction: column; line-height: 1.3; }
.t-meta b { font-size: .9rem; color: var(--ui-text); font-weight: 700; }
.t-meta span { font-size: .78rem; color: var(--ui-text-3); }

/* ── Anonymous trial banner (inside chat) ──────────────────── */
.anon-trial-banner {
  display: flex;
  align-items: center;
  gap: var(--ui-s3);
  padding: var(--ui-s3) var(--ui-s4);
  margin-bottom: var(--ui-s4);
  background: linear-gradient(90deg, rgba(0,113,227,.08), rgba(107,47,160,.06));
  border: 1px solid rgba(0,113,227,.25);
  border-radius: var(--ui-radius);
  font-size: .88rem;
  line-height: 1.45;
  color: var(--ui-text);
}
.anon-trial-banner .atb-ico { font-size: 1.2rem; flex-shrink: 0; }
.anon-trial-banner b { color: var(--ui-brand); font-weight: 700; }
.anon-trial-banner a { color: var(--ui-brand); font-weight: 600; }

/* ════════════════════════════════════════════════════════════════════
   APPLE-GRADE CHAT-SHELL CHROME — interactive states
   Brings the existing chrome (composer tools, system cards, message-card
   actions, welcome prompts, landing hero) onto the same #1f5fae accent
   language as the polished deck-action / quick-edit / preview surfaces.
   Every interactive control gets an obvious resting colour, a hover, a
   pressed (:active) state and a keyboard :focus-visible ring.
   ──────────────────────────────────────────────────────────────────── */

/* Composer attach / tool buttons — ghost secondary */
.btn-tool {
  transition: background var(--ui-t-fast) var(--ui-ease),
              color var(--ui-t-fast) var(--ui-ease),
              transform var(--ui-t-fast) var(--ui-ease) !important;
}
.btn-tool:hover { background: var(--ui-surface-3) !important; color: var(--ui-text) !important; }
.btn-tool:active { background: var(--sg-accent-soft) !important; color: var(--sg-accent) !important; transform: scale(.92); }
.btn-tool:focus-visible { box-shadow: var(--sg-accent-ring) !important; color: var(--sg-accent) !important; }

/* System cards — secondary (ghost/outline) + primary (accent) buttons */
.sys-btn {
  border-radius: 10px !important;
  border: 1.5px solid var(--sg-accent-border) !important;
  background: var(--ui-surface) !important;
  color: var(--ui-text) !important;
  transition: background var(--ui-t-fast) var(--ui-ease),
              border-color var(--ui-t-fast) var(--ui-ease),
              color var(--ui-t-fast) var(--ui-ease),
              transform var(--ui-t-fast) var(--ui-ease) !important;
}
.sys-btn:hover { background: var(--sg-accent-soft) !important; border-color: var(--sg-accent) !important; color: var(--sg-accent) !important; transform: translateY(-1px); }
.sys-btn:active { background: var(--sg-accent-soft-press) !important; transform: translateY(0); }
.sys-btn:focus-visible { box-shadow: var(--sg-accent-ring) !important; }
.sys-btn-primary {
  background: var(--sg-accent) !important;
  border-color: var(--sg-accent) !important;
  color: #fff !important;
}
.sys-btn-primary:hover { background: var(--sg-accent-hover) !important; border-color: var(--sg-accent-hover) !important; color: #fff !important; box-shadow: var(--sg-accent-shadow); }
.sys-btn-primary:active { background: var(--sg-accent-press) !important; border-color: var(--sg-accent-press) !important; box-shadow: var(--sg-accent-shadow-press); }

/* Message-card primary action (e.g. attached-file action) */
.msg-card .mc-act {
  background: var(--sg-accent) !important;
  border-radius: 10px !important;
  transition: background var(--ui-t-fast) var(--ui-ease),
              transform var(--ui-t-fast) var(--ui-ease),
              box-shadow var(--ui-t-fast) var(--ui-ease) !important;
}
.msg-card .mc-act:hover { background: var(--sg-accent-hover) !important; transform: translateY(-1px); box-shadow: var(--sg-accent-shadow); }
.msg-card .mc-act:active { background: var(--sg-accent-press) !important; transform: translateY(0); box-shadow: var(--sg-accent-shadow-press); }
.msg-card .mc-act:focus-visible { box-shadow: var(--sg-accent-ring) !important; }
.dark-mode .msg-card .mc-act { background: var(--sg-accent) !important; color: #fff !important; }

/* Welcome prompt cards — accent hover + focus ring */
.wp-card { transition: border-color var(--ui-t-fast) var(--ui-ease), background var(--ui-t-fast) var(--ui-ease), transform var(--ui-t-fast) var(--ui-ease) !important; }
.wp-card:hover { border-color: var(--sg-accent) !important; background: var(--sg-accent-soft) !important; transform: translateY(-1px); }
.wp-card:active { transform: translateY(0); background: var(--sg-accent-soft-press) !important; }
.wp-card:focus-visible { box-shadow: var(--sg-accent-ring) !important; border-color: var(--sg-accent) !important; }

/* Landing hero CTAs already carry resting + hover (lines 263-300) and a
   tactile :active press (line 820), and the hero ground is light — so the
   only gap is the keyboard focus ring. Brand it with the accent (a white
   ring would be invisible on the near-white hero). */
.btn-hero-primary:focus-visible,
.btn-hero-secondary:focus-visible { box-shadow: var(--sg-accent-ring) !important; }

/* === END SHARED UI === */