/* ============================================================
   BEHRANG.XYZ — Global Styles
   Monochrome Editorial · RTL-safe · Multi-language
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;700&family=Bebas+Neue&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

/* ---- Variables ---- */
:root {
  --black:   #080808;
  --white:   #f2f0eb;
  --grey:    #888;
  --grey-2:  #444;
  --border:  rgba(255,255,255,0.07);
  --border-2:rgba(255,255,255,0.12);
  --nav-h:   68px;
  --radius:  4px;
  --font-en: 'DM Sans', sans-serif;
  --font-fa: 'Vazirmatn', sans-serif;
  --font-display: 'Bebas Neue', sans-serif;
  --max-w:   1360px;
  --pad-x:   clamp(1.5rem, 4vw, 4rem);
  --section-pad: clamp(5rem, 10vw, 9rem);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-en);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
button { background: none; border: none; cursor: pointer; font-family: inherit; color: inherit; }
img, video { max-width: 100%; display: block; }

/* RTL for Persian */
[data-lang="fa"] body,
[data-lang="fa"] .nav-inner,
[data-lang="fa"] .about-grid,
[data-lang="fa"] .about-text,
[data-lang="fa"] .about-bio,
[data-lang="fa"] .acc-name,
[data-lang="fa"] .acc-body p,
[data-lang="fa"] .avatar-desc,
[data-lang="fa"] .cta-sub {
  font-family: var(--font-fa);
  direction: rtl;
}

/* ---- Container ---- */
.container {
  width: min(100% - calc(var(--pad-x) * 2), var(--max-w));
  margin-inline: auto;
}
.section-pad { padding-block: var(--section-pad); }

/* ============================================================
   NAVBAR
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: rgba(8,8,8,0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.nav-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  height: 100%;
  padding-inline: var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--white);
  flex-shrink: 0;
}
.nav-logo sup { font-size: 0.45em; opacity: 0.4; font-family: var(--font-en); }
.nav-links {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.5rem);
}
.nav-links a {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--grey);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }
.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}
.lang-switcher { display: flex; gap: 4px; }
.lang-btn {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 9px;
  border-radius: 3px;
  border: 1px solid transparent;
  color: var(--grey);
  transition: all 0.2s;
}
.lang-btn:hover { color: var(--white); border-color: var(--border-2); }
.lang-btn.active { color: var(--white); border-color: var(--border-2); background: rgba(255,255,255,0.06); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 1.5px; background: var(--white); transition: all 0.3s; }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 190;
  background: var(--black);
  display: flex;
  flex-direction: column;
  padding: 3rem var(--pad-x);
  gap: 2rem;
  transform: translateY(-110%);
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
  border-top: 1px solid var(--border);
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu a { font-size: 2rem; font-family: var(--font-display); letter-spacing: 0.05em; color: var(--grey); }
.mobile-menu a:hover { color: var(--white); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: var(--nav-h);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px;
}
.hero-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 40%, rgba(255,255,255,0.03) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 var(--pad-x) clamp(3rem, 6vw, 5rem);
  max-width: var(--max-w);
  margin-inline: auto;
  width: 100%;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 1.5rem;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--white);
  opacity: 0.4;
  flex-shrink: 0;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(5.5rem, 18vw, 18rem);
  line-height: 0.88;
  letter-spacing: -0.01em;
  color: var(--white);
  position: relative;
  display: inline-block;
}
.title-reg {
  font-family: var(--font-en);
  font-size: 0.18em;
  font-weight: 300;
  opacity: 0.35;
  vertical-align: super;
  position: relative;
  top: 0.1em;
}
.hero-sub {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: clamp(0.75rem, 1.2vw, 0.95rem);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
  margin-top: 1.5rem;
}
.hero-sub em { font-style: normal; opacity: 0.3; }

/* Marquee */
.hero-marquee-wrap {
  position: relative;
  z-index: 2;
  width: 100%;
  overflow: hidden;
  border-top: 1px solid var(--border);
  padding-block: 1.1rem;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.hero-marquee-track {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: max-content;
  animation: marquee 28s linear infinite;
  white-space: nowrap;
}
.hero-marquee-track span {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey);
}
.hero-marquee-track em {
  font-style: normal;
  color: var(--grey-2);
  font-size: 0.9rem;
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 5rem;
  right: var(--pad-x);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}
.scroll-line {
  width: 1px;
  height: 52px;
  background: linear-gradient(to bottom, transparent, var(--grey));
}
.scroll-hint span {
  font-size: 0.55rem;
  letter-spacing: 0.25em;
  color: var(--grey);
  writing-mode: vertical-rl;
}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   SECTION COMMON
   ============================================================ */
.section-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 1.25rem;
}
.section-head { margin-bottom: clamp(3rem, 6vw, 5rem); }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--white);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about { border-top: 1px solid var(--border); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(3rem, 6vw, 7rem);
  align-items: start;
}
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-2);
}
.about-card {
  background: var(--black);
  padding: clamp(1.5rem, 3vw, 2.5rem) clamp(1.25rem, 2vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: background 0.3s;
  cursor: default;
}
.about-card:hover { background: rgba(255,255,255,0.025); }
.card-num {
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  color: var(--grey-2);
}
.card-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.35rem);
  letter-spacing: 0.04em;
  color: var(--white);
  line-height: 1.1;
}
.about-bio {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.75;
  color: rgba(242,240,235,0.65);
  margin-bottom: 2.5rem;
}
.about-stats {
  display: flex;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stat { display: flex; flex-direction: column; gap: 0.3rem; }
.stat-n {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--white);
  line-height: 1;
}
.stat-l {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
}

/* ============================================================
   EXPERTISE / ACCORDION
   ============================================================ */
.expertise { border-top: 1px solid var(--border); }
.accordion { display: grid; }
.acc-item { border-top: 1px solid var(--border); }
.acc-item:last-child { border-bottom: 1px solid var(--border); }
.acc-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1.25rem, 2.5vw, 1.75rem) 0;
  gap: 2rem;
  transition: opacity 0.2s;
  text-align: left;
}
.acc-trigger:hover { opacity: 0.65; }
.acc-left { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem); }
.acc-num {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--grey-2);
  min-width: 2.5rem;
}
.acc-name {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.5vw, 2.4rem);
  letter-spacing: 0.04em;
  color: var(--white);
}
.acc-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--grey-2);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1), color 0.2s;
  flex-shrink: 0;
}
.acc-item.open .acc-icon { transform: rotate(45deg); color: var(--white); }
.acc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
}
.acc-item.open .acc-body { max-height: 160px; }
.acc-body p {
  padding: 0 0 clamp(1.5rem, 3vw, 2.5rem) clamp(2.5rem, 6vw, 5rem);
  font-size: clamp(0.85rem, 1.2vw, 0.95rem);
  line-height: 1.75;
  color: rgba(242,240,235,0.5);
  max-width: 640px;
}

/* ============================================================
   WORKS
   ============================================================ */
.works { border-top: 1px solid var(--border); }
.works-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.filter-btn {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 7px 14px;
  border-radius: 2px;
  border: 1px solid var(--border-2);
  color: var(--grey);
  transition: all 0.2s;
}
.filter-btn:hover { color: var(--white); border-color: rgba(255,255,255,0.25); }
.filter-btn.active { color: var(--black); background: var(--white); border-color: var(--white); }
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 1.5rem);
}
.work-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.work-card:hover { border-color: var(--border-2); transform: translateY(-4px); }
.work-card.hidden { display: none; }
.work-thumb { aspect-ratio: 16 / 10; overflow: hidden; }
.work-thumb-bg {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
  transition: transform 0.5s ease;
}
.work-card:hover .work-thumb-bg { transform: scale(1.04); }
.work-cat-badge {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey);
  background: rgba(8,8,8,0.6);
  padding: 4px 8px;
  border-radius: 2px;
  backdrop-filter: blur(4px);
}
.work-info {
  padding: clamp(1rem, 2vw, 1.5rem);
  background: rgba(255,255,255,0.02);
  flex: 1;
}
.work-info h3 {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
  color: var(--white);
}
.work-info p { font-size: 0.78rem; color: var(--grey); line-height: 1.5; }

/* ============================================================
   AI AVATAR
   ============================================================ */
.avatar-section { border-top: 1px solid var(--border); }
.avatar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.avatar-frame {
  aspect-ratio: 3 / 4;
  border: 1px solid var(--border-2);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(160deg, #141414, #080808);
}
.avatar-frame iframe { width: 100%; height: 100%; border: none; }
.avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  position: relative;
}
.avatar-orb {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, rgba(255,255,255,0.12), transparent 65%);
  border: 1px solid var(--border-2);
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.06); opacity: 1; }
}
.avatar-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--grey);
}
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--grey-2);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }
.avatar-desc {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  line-height: 1.75;
  color: rgba(242,240,235,0.55);
  margin-bottom: 2rem;
}
.quick-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.prompt-btn {
  font-size: 0.72rem;
  padding: 8px 14px;
  border: 1px solid var(--border-2);
  border-radius: 2px;
  color: var(--grey);
  transition: all 0.2s;
}
.prompt-btn:hover { color: var(--white); border-color: rgba(255,255,255,0.25); background: rgba(255,255,255,0.04); }
.chat-input-wrap {
  display: flex;
  gap: 0;
  border: 1px solid var(--border-2);
  border-radius: 3px;
  overflow: hidden;
}
.chat-input {
  flex: 1;
  background: rgba(255,255,255,0.03);
  border: none;
  padding: 14px 16px;
  font-size: 0.85rem;
  color: var(--white);
  font-family: var(--font-en);
  outline: none;
}
.chat-input::placeholder { color: var(--grey-2); }
.chat-send {
  padding: 14px 20px;
  background: var(--white);
  color: var(--black);
  font-size: 1rem;
  font-weight: 700;
  transition: background 0.2s;
}
.chat-send:hover { background: rgba(242,240,235,0.85); }

/* ============================================================
   CTA
   ============================================================ */
.cta-section { border-top: 1px solid var(--border); }
.cta-box {
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: clamp(3rem, 7vw, 6rem) clamp(2rem, 5vw, 5rem);
  text-align: center;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(255,255,255,0.04) 0%, transparent 60%),
    #0d0d0d;
  position: relative;
  overflow: hidden;
}
.cta-label {
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 2rem;
}
.cta-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 8rem);
  line-height: 0.88;
  letter-spacing: 0.02em;
  color: var(--white);
  margin-bottom: 2rem;
}
.cta-sub {
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  color: var(--grey);
  max-width: 520px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 16px 36px;
  border: 1px solid var(--white);
  border-radius: 2px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--white);
  transition: background 0.25s, color 0.25s;
  margin-bottom: 1.5rem;
}
.cta-btn:hover { background: var(--white); color: var(--black); }
.cta-email {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--grey-2);
  margin-top: 0.5rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--white);
}
.footer-logo sup { font-size: 0.45em; opacity: 0.4; font-family: var(--font-en); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.72rem; color: var(--grey); letter-spacing: 0.06em; transition: color 0.2s; }
.footer-links a:hover { color: var(--white); }
.footer-copy { font-size: 0.65rem; color: var(--grey-2); letter-spacing: 0.1em; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .about-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .avatar-grid { grid-template-columns: 1fr; }
  .scroll-hint { display: none; }
  .hero-title { font-size: clamp(4rem, 20vw, 8rem); }
}

@media (max-width: 560px) {
  .works-grid { grid-template-columns: 1fr; }
  .about-stats { gap: 1.5rem; flex-wrap: wrap; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .hero-sub { flex-direction: column; gap: 0.4rem; align-items: flex-start; }
  .hero-sub em { display: none; }
}