/* ==========================================================================
   FIDAR PARTAK ASIA — FPA DESIGN SYSTEM
   نسخه 0.1 | پایه: Black + Graphite + Metallic Gold (Accent)
   قانون: هیچ صفحه‌ای خارج از این توکن‌ها ساخته نمی‌شود.
   ========================================================================== */

/* --------------------------------------------------------------------------
   01 — TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Surfaces */
  --fpa-black:      #0A0A0A;
  --fpa-charcoal:   #151515;
  --fpa-graphite:   #202020;
  --fpa-steel:      #2A2A2A;

  /* Brand accent */
  --fpa-gold:       #C9A227;
  --fpa-gold-soft:  #D8B45A;
  --fpa-gold-dim:   rgba(201, 162, 39, 0.14);

  /* Content */
  --fpa-white:      #FFFFFF;
  --fpa-off-white:  #F3F3F3;
  --fpa-text:       #E8E7E3;
  --fpa-muted:      #A3A19A;
  --fpa-faint:      #6E6C67;

  /* Lines */
  --line:           rgba(255, 255, 255, 0.08);
  --line-strong:    rgba(255, 255, 255, 0.16);
  --line-gold:      rgba(201, 162, 39, 0.34);

  /* Typography */
  --font-fa: "Vazirmatn", "IRANSans", system-ui, -apple-system, sans-serif;
  --font-en: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --fs-display: clamp(2.15rem, 1.35rem + 3.4vw, 4.15rem);
  --fs-h1:      clamp(1.85rem, 1.25rem + 2.4vw, 3.05rem);
  --fs-h2:      clamp(1.5rem, 1.13rem + 1.5vw, 2.3rem);
  --fs-h3:      clamp(1.15rem, 1rem + 0.6vw, 1.45rem);
  --fs-lead:    clamp(1rem, 0.95rem + 0.35vw, 1.18rem);
  --fs-body:    1rem;
  --fs-sm:      0.9rem;
  --fs-xs:      0.8rem;

  --lh-tight: 1.22;
  --lh-snug:  1.45;
  --lh-body:  1.9;

  /* Spacing (4pt) */
  --s-1: 4px;   --s-2: 8px;   --s-3: 12px;  --s-4: 16px;
  --s-5: 24px;  --s-6: 32px;  --s-7: 48px;  --s-8: 64px;
  --s-9: 96px;  --s-10: 128px;

  --section-y: clamp(64px, 8vw, 128px);

  /* Radius — minimal, industrial */
  --r-xs: 2px;
  --r-sm: 4px;
  --r-md: 8px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 18px 40px -24px rgba(0, 0, 0, 0.9);
  --shadow-gold: 0 0 0 1px var(--line-gold), 0 20px 50px -30px rgba(201, 162, 39, 0.55);

  /* Layout */
  --container: 1280px;
  --gutter: clamp(20px, 4vw, 40px);

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 160ms;
  --dur: 280ms;
  --dur-slow: 620ms;
}

/* --------------------------------------------------------------------------
   02 — RESET / BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--fpa-black);
  color: var(--fpa-text);
  font-family: var(--font-fa);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

h1, h2, h3, h4 {
  margin: 0;
  line-height: var(--lh-tight);
  font-weight: 700;
  color: var(--fpa-white);
  letter-spacing: -0.01em;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

ul { margin: 0; padding: 0; list-style: none; }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--fpa-gold);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

::selection { background: var(--fpa-gold); color: var(--fpa-black); }

/* اعداد و متن لاتین داخل متن فارسی */
.en, .num {
  font-family: var(--font-en);
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.01em;
}

/* --------------------------------------------------------------------------
   03 — LAYOUT
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); position: relative; }
.section--charcoal { background: var(--fpa-charcoal); }
.section--tight { padding-block: clamp(48px, 5vw, 80px); }

.section-head { max-width: 62ch; margin-bottom: var(--s-7); }
.section-head h2 { font-size: var(--fs-h2); }
.section-head .sub {
  margin-top: var(--s-3);
  color: var(--fpa-gold-soft);
  font-size: var(--fs-lead);
  font-weight: 500;
}
.section-head .desc {
  margin-top: var(--s-4);
  color: var(--fpa-muted);
  max-width: 60ch;
}

.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
}

/* خط مرزی طلایی بین بخش‌ها */
.rule {
  height: 1px;
  background: linear-gradient(to left, transparent, var(--line-gold), transparent);
  border: 0;
  margin: 0;
}

/* --------------------------------------------------------------------------
   04 — TECHNICAL TEXTURE (Engineering feel — همیشه subtle)
   -------------------------------------------------------------------------- */
.tech-grid { position: relative; }
.tech-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 78%);
}

/* برچسب ریز فنی — مثل نشانه‌گذاری روی نقشه */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--fs-xs);
  color: var(--fpa-gold-soft);
  font-weight: 500;
}
.tag::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--fpa-gold);
  flex: none;
}

.note {
  font-size: var(--fs-sm);
  color: var(--fpa-faint);
  line-height: var(--lh-snug);
}

/* --------------------------------------------------------------------------
   05 — BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 13px 26px;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn--gold {
  background: var(--fpa-gold);
  color: var(--fpa-black);
}
.btn--gold:hover { background: var(--fpa-gold-soft); }

.btn--outline {
  border-color: var(--line-strong);
  color: var(--fpa-white);
}
.btn--outline:hover { border-color: var(--fpa-gold); color: var(--fpa-gold-soft); }

.btn--ghost { color: var(--fpa-muted); padding-inline: 0; }
.btn--ghost:hover { color: var(--fpa-gold-soft); }

.btn--sm { padding: 9px 18px; font-size: var(--fs-xs); }

/* --------------------------------------------------------------------------
   06 — CARDS
   -------------------------------------------------------------------------- */
.card {
  background: var(--fpa-graphite);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-5);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card:hover { border-color: var(--line-gold); background: var(--fpa-steel); }
.card h3 { font-size: var(--fs-h3); margin-bottom: var(--s-3); }
.card p { color: var(--fpa-muted); font-size: var(--fs-sm); }

/* کارت محصول */
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--fpa-graphite);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.product-card:hover { border-color: var(--line-gold); transform: translateY(-3px); }

.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(ellipse at 50% 35%, #232323 0%, #131313 62%, #0C0C0C 100%);
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--line);
}
.product-card__body { padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3); flex: 1; }
.product-card__body h3 { font-size: var(--fs-h3); }
.product-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-4);
  font-size: var(--fs-xs);
  color: var(--fpa-faint);
  padding-top: var(--s-3);
  border-top: 1px dashed var(--line);
  margin-top: auto;
}

/* نشان وضعیت داده — تا زمانی که واحد فنی داده واقعی ندهد */
.badge-pending {
  position: absolute;
  inset-block-start: var(--s-3);
  inset-inline-start: var(--s-3);
  font-size: 0.72rem;
  color: var(--fpa-gold-soft);
  background: rgba(10, 10, 10, 0.78);
  border: 1px solid var(--line-gold);
  border-radius: var(--r-xs);
  padding: 4px 9px;
}

/* --------------------------------------------------------------------------
   07 — FORMS
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: var(--s-2); }
.field label { font-size: var(--fs-sm); color: var(--fpa-muted); }
.field input,
.field select,
.field textarea {
  font: inherit;
  color: var(--fpa-white);
  background: var(--fpa-black);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  transition: border-color var(--dur) var(--ease);
}
.field input:focus,
.field select:focus,
.field textarea:focus { border-color: var(--fpa-gold); outline: none; }

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

/* --------------------------------------------------------------------------
   09 — UTILITIES
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  inset-block-start: -100%;
  inset-inline-start: var(--s-4);
  z-index: 999;
  background: var(--fpa-gold);
  color: var(--fpa-black);
  padding: 10px 18px;
  border-radius: var(--r-sm);
}
.skip-link:focus { inset-block-start: var(--s-4); }

.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;
}