/* ============================================================================
   FALAK — فلك  ·  Cosmic Design System
   Minimal · Premium · Celestial  ·  Bilingual (AR-RTL / EN-LTR)
   Production CSS · Logical properties throughout · No image assets
   ========================================================================== */

/* ----------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* — Core surfaces (deep cosmic navy) — */
  --color-bg:               #0B0F1E;   /* page void                       */
  --color-bg-elevated:      #0E1324;   /* slightly lifted band            */
  --color-surface:          #141829;   /* card / glass base               */
  --color-surface-2:        #1A1F35;   /* nested surface                  */
  --color-surface-hover:    #1E2440;   /* interactive hover               */

  /* — Accent (refined indigo → violet) — */
  --color-primary:          #6366F1;   /* indigo-500                      */
  --color-primary-soft:     #818CF8;   /* indigo-400                      */
  --color-primary-strong:   #4F52E0;   /* pressed                         */
  --color-accent:           #8B5CF6;   /* violet                          */
  --color-accent-glow:      #A78BFA;   /* halo highlight                  */

  /* — Text — */
  --color-text:             #E5E7EB;   /* primary                         */
  --color-text-strong:      #F8FAFC;   /* headings                        */
  --color-text-secondary:   #94A3B8;   /* muted                           */
  --color-text-tertiary:    #64708A;   /* faint / captions                */
  --color-text-on-accent:   #FFFFFF;

  /* — Semantic — */
  --color-success:          #10B981;
  --color-warning:          #F59E0B;
  --color-error:            #EF4444;

  /* — Lines & borders (low-contrast, glassy) — */
  --color-border:           rgba(148, 163, 184, 0.12);
  --color-border-strong:    rgba(148, 163, 184, 0.20);
  --color-border-accent:    rgba(129, 140, 248, 0.35);

  /* — Glass fills — */
  --glass-fill:             rgba(20, 24, 41, 0.55);
  --glass-fill-strong:      rgba(20, 24, 41, 0.78);
  --glass-stroke:           rgba(165, 180, 252, 0.10);

  /* — Gradients — */
  --gradient-accent:        linear-gradient(135deg, #818CF8 0%, #6366F1 45%, #8B5CF6 100%);
  --gradient-accent-soft:   linear-gradient(135deg, rgba(129,140,248,0.18), rgba(139,92,246,0.18));
  --gradient-text:          linear-gradient(120deg, #C7D2FE 0%, #A78BFA 60%, #818CF8 100%);
  --gradient-halo:          radial-gradient(closest-side, rgba(139,92,246,0.32), rgba(99,102,241,0.10) 60%, transparent 100%);

  /* — Typography ————————————————————————————————————————————— */
  --font-latin:   'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-arabic:  'Thmanyah', 'Cairo', 'Noto Kufi Arabic', system-ui, 'Segoe UI', Tahoma, sans-serif;
  --font-sans:    var(--font-latin);

  /* Fluid type scale — minor-third-ish, generous */
  --text-xs:    clamp(0.75rem,  0.72rem + 0.15vw, 0.8125rem);
  --text-sm:    clamp(0.875rem, 0.84rem + 0.18vw, 0.9375rem);
  --text-base:  clamp(1rem,     0.96rem + 0.22vw, 1.0625rem);
  --text-lg:    clamp(1.125rem, 1.06rem + 0.32vw, 1.25rem);
  --text-xl:    clamp(1.375rem, 1.27rem + 0.5vw,  1.625rem);
  --text-2xl:   clamp(1.75rem,  1.55rem + 1.0vw,  2.25rem);
  --text-3xl:   clamp(2.25rem,  1.9rem  + 1.7vw,  3.25rem);
  --text-4xl:   clamp(2.75rem,  2.1rem  + 3.2vw,  4.75rem);

  --leading-tight:    1.12;
  --leading-snug:     1.3;
  --leading-normal:   1.6;
  --leading-relaxed:  1.85;

  --tracking-tight:   -0.02em;
  --tracking-snug:    -0.012em;
  --tracking-wide:    0.04em;
  --tracking-wider:   0.14em;

  --weight-regular:   400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;

  /* — Spacing scale (4px base, exponential breathing room) — */
  --space-3xs:  0.25rem;   /*  4 */
  --space-2xs:  0.5rem;    /*  8 */
  --space-xs:   0.75rem;   /* 12 */
  --space-sm:   1rem;      /* 16 */
  --space-md:   1.5rem;    /* 24 */
  --space-lg:   2.5rem;    /* 40 */
  --space-xl:   4rem;      /* 64 */
  --space-2xl:  6rem;      /* 96 */
  --space-3xl:  9rem;      /* 144 */

  /* — Radii — */
  --radius-xs:   6px;
  --radius-sm:   10px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --radius-xl:   32px;
  --radius-pill: 999px;

  /* — Shadows (cool, cosmic; ambient + accent glow) — */
  --shadow-sm:    0 1px 2px rgba(0,0,0,0.4);
  --shadow-md:    0 8px 28px -8px rgba(0,0,0,0.55);
  --shadow-lg:    0 24px 60px -20px rgba(0,0,0,0.65);
  --shadow-glow:  0 0 0 1px rgba(129,140,248,0.18),
                  0 18px 60px -24px rgba(99,102,241,0.55);
  --shadow-glow-strong:
                  0 0 0 1px rgba(129,140,248,0.30),
                  0 22px 70px -18px rgba(139,92,246,0.65);

  /* — Layout — */
  --container-max:    1180px;
  --container-narrow: 760px;
  --container-prose:  68ch;
  --gutter:           clamp(1.25rem, 4vw, 3rem);

  /* — Motion (slow, tasteful) — */
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:  cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:     0.22s;
  --dur-base:     0.4s;
  --dur-slow:     0.7s;
  --dur-ambient:  18s;

  color-scheme: dark;
}

/* ----------------------------------------------------------------------------
   2. RESET / BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
  hanging-punctuation: first last;
}

body {
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  font-weight: var(--weight-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis: none;
  overflow-x: hidden;
  position: relative;
}

img, picture, svg, video, canvas {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
  letter-spacing: inherit;
}

button { background: none; border: none; cursor: pointer; }

ul[role="list"], ol[role="list"] { list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-strong);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

p { text-wrap: pretty; }

:where(:focus-visible) {
  outline: 2px solid var(--color-primary-soft);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

::selection {
  background: rgba(129, 140, 248, 0.32);
  color: var(--color-text-strong);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-surface-2);
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-surface-hover); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ----------------------------------------------------------------------------
   3. RTL-AWARE LAYOUT HELPERS  (logical properties only)
   -------------------------------------------------------------------------- */
[dir="rtl"] {
  --font-sans: var(--font-arabic);
}
[dir="rtl"] body,
:root:lang(ar) body { font-family: var(--font-arabic); }

/* Arabic headings read better a touch looser */
[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] h3 {
  letter-spacing: 0;
  line-height: var(--leading-snug);
}

.container {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-inline-size: var(--container-narrow); }
.container--prose  { max-inline-size: var(--container-prose); }

.section { padding-block: var(--space-2xl); }
.section--tight { padding-block: var(--space-xl); }

.stack > * + * { margin-block-start: var(--flow, var(--space-sm)); }
.stack--lg { --flow: var(--space-md); }
.stack--xl { --flow: var(--space-lg); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap, var(--space-sm));
  align-items: center;
}

.grid-auto {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
}

/* Directional affordances via logical inset/margins */
.flow-end   { margin-inline-start: auto; }   /* push to trailing edge */
.flow-start { margin-inline-end: auto; }      /* push to leading edge  */
.text-start { text-align: start; }
.text-end   { text-align: end; }
.text-center{ text-align: center; }

/* Icons that imply direction (arrows) mirror automatically in RTL */
[dir="rtl"] .icon-directional { transform: scaleX(-1); }

.visually-hidden {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip-path: inset(50%);
  white-space: nowrap; border: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-primary-soft);
}
[dir="rtl"] .eyebrow { letter-spacing: var(--tracking-wide); text-transform: none; }

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.muted   { color: var(--color-text-secondary); }
.faint   { color: var(--color-text-tertiary); }

/* ----------------------------------------------------------------------------
   4. COSMIC BACKGROUND  (pure CSS — starfield + nebula gradient, no images)
   -------------------------------------------------------------------------- */
.cosmos {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, #16183a 0%, transparent 55%),
    radial-gradient(90% 60% at 85% 0%,  rgba(139,92,246,0.12) 0%, transparent 50%),
    radial-gradient(80% 60% at 10% 20%, rgba(99,102,241,0.10) 0%, transparent 55%),
    var(--color-bg);
}

/* Drifting nebula halos */
.cosmos::before,
.cosmos::after {
  content: "";
  position: absolute;
  inline-size: 60vmax;
  block-size: 60vmax;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.5;
  will-change: transform;
}
.cosmos::before {
  inset-block-start: -20vmax;
  inset-inline-end: -10vmax;
  background: var(--gradient-halo);
  animation: nebula-drift-a var(--dur-ambient) var(--ease-in-out) infinite alternate;
}
.cosmos::after {
  inset-block-end: -25vmax;
  inset-inline-start: -15vmax;
  background: radial-gradient(closest-side, rgba(99,102,241,0.28), transparent 70%);
  animation: nebula-drift-b calc(var(--dur-ambient) * 1.4) var(--ease-in-out) infinite alternate;
}

/* Two layered star fields via box-shadow dots + tiny twinkle */
.cosmos__stars,
.cosmos__stars::after {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%,  rgba(255,255,255,0.9), transparent),
    radial-gradient(1px 1px   at 75% 18%,    rgba(199,210,254,0.8), transparent),
    radial-gradient(1.2px 1.2px at 40% 70%,  rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px   at 88% 60%,    rgba(167,139,250,0.8), transparent),
    radial-gradient(1.4px 1.4px at 12% 85%,  rgba(255,255,255,0.75), transparent),
    radial-gradient(1px 1px   at 60% 45%,    rgba(255,255,255,0.6), transparent),
    radial-gradient(1.1px 1.1px at 32% 12%,  rgba(199,210,254,0.7), transparent),
    radial-gradient(1px 1px   at 95% 92%,    rgba(255,255,255,0.7), transparent);
  background-repeat: no-repeat;
}
.cosmos__stars {
  animation: twinkle 6s ease-in-out infinite;
}
.cosmos__stars::after {
  content: "";
  background-size: 100% 100%;
  transform: scale(1.6) rotate(8deg);
  opacity: 0.5;
  animation: twinkle 9s ease-in-out infinite reverse;
}

/* Faint vignette to seat content */
.cosmos__vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(130% 110% at 50% 0%, transparent 55%, rgba(5,7,16,0.65) 100%);
}

@keyframes nebula-drift-a {
  from { transform: translate3d(0,0,0) scale(1); }
  to   { transform: translate3d(-4%, 6%, 0) scale(1.12); }
}
@keyframes nebula-drift-b {
  from { transform: translate3d(0,0,0) scale(1.05); }
  to   { transform: translate3d(5%, -5%, 0) scale(1); }
}
@keyframes twinkle {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 0.95; }
}

/* ----------------------------------------------------------------------------
   5. COMPONENTS
   -------------------------------------------------------------------------- */

/* — Glass primitive — */
.glass {
  background: var(--glass-fill);
  border: 1px solid var(--glass-stroke);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

/* — Navigation — */
.nav {
  position: sticky;
  inset-block-start: 0;
  z-index: 100;
  inline-size: 100%;
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  block-size: 72px;
  padding-inline: var(--gutter);
  max-inline-size: var(--container-max);
  margin-inline: auto;
}
.nav--scrolled {
  background: rgba(11, 15, 30, 0.72);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-block-end: 1px solid var(--color-border);
  transition: background var(--dur-base) var(--ease-out);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-arabic);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-strong);
  letter-spacing: 0;
}
.nav__logo {
  inline-size: 34px;
  block-size: 34px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-glow);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-inline-start: auto;
}
.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  padding-block: var(--space-2xs);
  position: relative;
}
.nav__link:hover { color: var(--color-text-strong); }
.nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: -2px;
  block-size: 1.5px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: inline-start;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav__link:hover::after { transform: scaleX(1); }

@media (max-width: 720px) {
  .nav__links { display: none; }
}

/* — Buttons — */
.btn {
  --btn-bg: var(--color-surface);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  padding-block: 0.85rem;
  padding-inline: 1.6rem;
  border-radius: var(--radius-pill);
  color: var(--color-text-strong);
  background: var(--btn-bg);
  border: 1px solid var(--color-border-strong);
  white-space: nowrap;
  transition:
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.99); }

.btn--primary {
  background: var(--gradient-accent);
  border-color: transparent;
  color: var(--color-text-on-accent);
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { box-shadow: var(--shadow-glow-strong); }

.btn--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn--ghost:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-accent);
}

.btn--glass {
  background: var(--glass-fill);
  border-color: var(--glass-stroke);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.btn--lg { padding-block: 1.05rem; padding-inline: 2rem; font-size: var(--text-base); }
.btn--block { display: flex; inline-size: 100%; }

/* Store badges row */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* — Hero — */
.hero {
  position: relative;
  padding-block: clamp(5rem, 14vh, 9rem) var(--space-2xl);
  text-align: center;
}
.hero__content {
  max-inline-size: 52rem;
  margin-inline: auto;
  display: grid;
  justify-items: center;
  gap: var(--space-md);
}
.hero__title {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
}
[dir="rtl"] .hero__title { letter-spacing: 0; }
.hero__subtitle {
  font-size: var(--text-lg);
  font-weight: var(--weight-regular);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-inline-size: 40ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-block-start: var(--space-sm);
}
.hero__halo {
  position: absolute;
  inset-block-start: -10%;
  inset-inline: 0;
  margin-inline: auto;
  inline-size: min(60rem, 90%);
  block-size: 40rem;
  background: var(--gradient-halo);
  filter: blur(20px);
  opacity: 0.6;
  z-index: -1;
  pointer-events: none;
}
/* App mockup frame under hero */
.hero__device {
  margin-block-start: var(--space-xl);
  margin-inline: auto;
  max-inline-size: 22rem;
  border-radius: var(--radius-xl);
  padding: var(--space-2xs);
  background: var(--glass-fill-strong);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.hero__device img { border-radius: calc(var(--radius-xl) - 8px); }

/* — Pill badge — */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding-block: var(--space-3xs);
  padding-inline: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-primary-soft);
  background: var(--gradient-accent-soft);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-pill);
}
.badge__dot {
  inline-size: 6px; block-size: 6px;
  border-radius: 50%;
  background: var(--color-accent-glow);
  box-shadow: 0 0 10px var(--color-accent-glow);
}

/* — Feature card — */
.feature-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
}
.feature-card {
  position: relative;
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--glass-fill);
  border: 1px solid var(--glass-stroke);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  overflow: hidden;
  isolation: isolate;
  transition:
    transform var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}
.feature-card::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  inline-size: 40%;
  block-size: 40%;
  background: var(--gradient-halo);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--dur-slow) var(--ease-out);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.feature-card:hover::before { opacity: 0.7; }

.feature-card__icon {
  display: grid;
  place-items: center;
  inline-size: 48px;
  block-size: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-accent-soft);
  border: 1px solid var(--color-border-accent);
  color: var(--color-primary-soft);
  font-size: var(--text-lg);
}
.feature-card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}
.feature-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* — Section heading block — */
.section-head {
  display: grid;
  gap: var(--space-xs);
  max-inline-size: 44rem;
  margin-block-end: var(--space-lg);
}
.section-head--center {
  justify-items: center;
  text-align: center;
  margin-inline: auto;
}
.section-head__title { font-size: var(--text-2xl); font-weight: var(--weight-bold); }
.section-head__lead {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* — Footer — */
.footer {
  margin-block-start: var(--space-3xl);
  border-block-start: 1px solid var(--color-border);
  background: linear-gradient(to top, rgba(20,24,41,0.5), transparent);
}
.footer__inner {
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-block: var(--space-xl);
  padding-inline: var(--gutter);
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(14rem, 1.5fr) repeat(auto-fit, minmax(8rem, 1fr));
}
.footer__brand {
  display: grid;
  gap: var(--space-xs);
  max-inline-size: 22rem;
}
.footer__wordmark {
  font-family: var(--font-arabic);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-strong);
}
.footer__tag {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}
.footer__col { display: grid; gap: var(--space-2xs); align-content: start; }
.footer__col h4 {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-block-end: var(--space-3xs);
}
[dir="rtl"] .footer__col h4 { text-transform: none; letter-spacing: var(--tracking-wide); }
.footer__col a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.footer__col a:hover { color: var(--color-text-strong); }
.footer__bottom {
  border-block-start: 1px solid var(--color-border);
  padding-block: var(--space-md);
  padding-inline: var(--gutter);
  max-inline-size: var(--container-max);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* — Legal / prose container — */
.prose {
  max-inline-size: var(--container-prose);
  margin-inline: auto;
  padding-block: var(--space-xl);
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}
.prose > * + * { margin-block-start: var(--space-sm); }
.prose h1 { font-size: var(--text-3xl); margin-block-end: var(--space-xs); }
.prose h2 {
  font-size: var(--text-xl);
  margin-block-start: var(--space-lg);
  padding-block-end: var(--space-2xs);
  border-block-end: 1px solid var(--color-border);
}
.prose h3 { font-size: var(--text-lg); margin-block-start: var(--space-md); }
.prose p, .prose li { color: var(--color-text-secondary); }
.prose a {
  color: var(--color-primary-soft);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-color: var(--color-border-accent);
}
.prose a:hover { text-decoration-color: var(--color-primary-soft); }
.prose ul, .prose ol { padding-inline-start: 1.4em; display: grid; gap: var(--space-2xs); }
.prose li::marker { color: var(--color-primary); }
.prose strong { color: var(--color-text-strong); font-weight: var(--weight-semibold); }
.prose hr { border: none; border-block-start: 1px solid var(--color-border); margin-block: var(--space-lg); }
.prose blockquote {
  border-inline-start: 3px solid var(--color-border-accent);
  padding-inline-start: var(--space-sm);
  color: var(--color-text-secondary);
  font-style: italic;
}
.prose code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.9em;
  background: var(--color-surface-2);
  padding: 0.1em 0.4em;
  border-radius: var(--radius-xs);
  color: var(--color-accent-glow);
}
.prose__meta {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-block-end: var(--space-md);
}

/* — Divider with celestial dot — */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-tertiary);
}
.divider::before,
.divider::after {
  content: "";
  block-size: 1px;
  flex: 1;
  background: linear-gradient(to inline-end, transparent, var(--color-border-strong), transparent);
}

/* — Entrance reveal (slow, tasteful; gated by reduced-motion) — */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal--delay-1 { transition-delay: 0.08s; }
.reveal--delay-2 { transition-delay: 0.16s; }
.reveal--delay-3 { transition-delay: 0.24s; }

/* ----------------------------------------------------------------------------
   6. UTILITIES
   -------------------------------------------------------------------------- */
.mx-auto { margin-inline: auto; }
.full    { inline-size: 100%; }
.relative{ position: relative; }
.center  { display: grid; place-items: center; }
.gap-sm  { gap: var(--space-sm); }
.gap-md  { gap: var(--space-md); }
.mbs-lg  { margin-block-start: var(--space-lg); }
.mbs-xl  { margin-block-start: var(--space-xl); }
.maxw-narrow { max-inline-size: var(--container-narrow); margin-inline: auto; }

@media (max-width: 640px) {
  .hero { padding-block-start: clamp(3.5rem, 10vh, 6rem); }
  .feature-card { padding: var(--space-md); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
/* ----------------------------------------------------------------------------
   7. SITE ADDENDA — nav button size + language selector
   -------------------------------------------------------------------------- */
.btn--sm { padding-block: 0.6rem; padding-inline: 1.15rem; font-size: var(--text-xs); }

.langsel {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  padding-inline: var(--space-xs);
  block-size: 38px;
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.langsel:hover { border-color: var(--color-border-accent); color: var(--color-text-strong); }
.langsel svg { inline-size: 16px; block-size: 16px; opacity: 0.8; }
.langsel__select {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: none;
  color: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding-inline-end: var(--space-2xs);
  max-inline-size: 9rem;
  cursor: pointer;
  outline: none;
}
.langsel__select option { background: var(--color-surface); color: var(--color-text); }

.footer__bottom .langsel { block-size: 34px; }

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__inner .langsel,
  .nav__inner .btn--primary { display: none; }
}