/* ==========================================================================
   داوینچی — آرت و رنگِ ساختمان
   Main stylesheet
   Sections: 1) Tokens  2) Reset  3) Layout  4) Header/Nav  5) Buttons
   6) Hero slider  7) Sections & cards  8) Forms  9) Footer
   10) Error pages  11) Blog/Article  12) Responsive  13) Motion
   ========================================================================== */

/* ------------------------------ 1) Tokens ------------------------------- */
:root {
  /* Brand — deep navy + matte blue on white */
  --navy:        #1E3A5F;
  --navy-ink:    #12283F;
  --blue:        #2C5C8A;
  --blue-deep:   #2A567F;
  --blue-soft:   #CFE0F0;

  /* Surfaces */
  --paper:       #F3F7FB;
  --white:       #FFFFFF;
  --tint-1:      #E8F0F9;
  --tint-2:      #E1EBF7;
  --tint-3:      #EAF0F8;
  --tint-img:    #E4EDF6;

  /* Text */
  --text:        #1E3A5F;
  --muted:       #5a5f6e;
  --muted-2:     #767c8c;
  --muted-3:     #94a2bd;

  /* Lines & shadows (navy-tinted) */
  --line:        rgba(40, 56, 80, 0.08);
  --line-2:      rgba(40, 56, 80, 0.14);
  --shadow-sm:   0 2px 8px rgba(40, 56, 80, 0.07);
  --shadow-md:   0 18px 38px rgba(40, 56, 80, 0.14);
  --shadow-lg:   0 24px 50px rgba(40, 56, 80, 0.18);

  /* Radii */
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --r-full: 999px;

  /* Type */
  --font: 'Vazirmatn', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Layout */
  --container: 1200px;
  --gutter: clamp(18px, 5vw, 40px);
  --header-h: 72px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ------------------------------ 2) Reset -------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--paper);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.1; letter-spacing: -0.02em; font-weight: 900; }
p { margin: 0; text-wrap: pretty; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--blue); }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 3px solid rgba(44, 92, 138, 0.5); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--blue); color: #fff; }

.skip-link {
  position: absolute; z-index: 200;
  inset-block-start: 0; inset-inline-start: 16px;
  transform: translateY(-150%);
  background: #fff; color: var(--navy);
  padding: 10px 16px; border-radius: 0 0 10px 10px;
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ----------------------------- 3) Layout -------------------------------- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 9vw, 118px); }
.section--white { background: var(--white); border-block: 1px solid var(--line); }
.section--navy { background: var(--navy); color: #fff; }
.section--paper { background: var(--paper); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.05em; color: var(--blue-deep);
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; border-radius: 2px; }
.section--navy .eyebrow { color: var(--blue-soft); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; flex-wrap: wrap; margin-bottom: clamp(36px, 5vw, 56px); }
.section-head h2 { font-size: clamp(30px, 5vw, 52px); margin-top: 16px; }
.section-head p { max-width: 360px; font-size: 16px; color: var(--muted); }
.section-head--center { flex-direction: column; align-items: center; text-align: center; max-width: 640px; margin-inline: auto; }
.section-head--center p { max-width: 620px; }

.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 24px; }
.lead { font-size: clamp(16px, 2.1vw, 19px); color: var(--muted); line-height: 1.85; }

/* --------------------------- 4) Header / Nav ---------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.24);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-block: 13px; }

/* Solid state: scrolled OR non-home (data-solid) */
.site-header.is-solid,
.site-header[data-solid] {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px rgba(30, 58, 95, 0.06);
}

.brand { display: flex; align-items: center; gap: 11px; }
.brand__name { font-weight: 900; font-size: 20px; letter-spacing: -0.01em; color: #fff; line-height: 1; }
.brand__sub  { font-weight: 600; font-size: 10.5px; letter-spacing: 0.14em; color: rgba(255,255,255,0.85); margin-top: 3px; }
.is-solid .brand__name, [data-solid] .brand__name { color: var(--navy); }
.is-solid .brand__sub,  [data-solid] .brand__sub  { color: var(--blue-deep); }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 600; color: #fff; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue-soft); }
.is-solid .nav-links a, [data-solid] .nav-links a { color: #3b3d44; }
.is-solid .nav-links a:hover, [data-solid] .nav-links a:hover,
.is-solid .nav-links a[aria-current="page"], [data-solid] .nav-links a[aria-current="page"] { color: var(--blue); }

.header-actions { display: flex; align-items: center; gap: 10px; }

.burger {
  display: none; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px;
  border: 1.5px solid rgba(255, 255, 255, 0.24); background: rgba(255, 255, 255, 0.16);
}
.burger svg { stroke: #fff; }
.is-solid .burger, [data-solid] .burger { border-color: var(--line); background: #fff; }
.is-solid .burger svg, [data-solid] .burger svg { stroke: var(--navy); }

.mobile-drawer {
  display: none; position: fixed; inset: var(--header-h) 0 auto 0; z-index: 95;
  background: #fff; border-bottom: 1px solid var(--line-2);
  box-shadow: 0 16px 30px rgba(30, 58, 95, 0.14);
  padding: 14px var(--gutter) 22px;
}
.mobile-drawer.is-open { display: block; }
.mobile-drawer a { display: block; padding: 13px 6px; font-weight: 600; font-size: 17px; border-bottom: 1px solid var(--line); }
.mobile-drawer a:last-child { border: 0; margin-top: 12px; text-align: center; }

/* ----------------------------- 5) Buttons ------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 56px; padding-inline: 28px; border: none; border-radius: var(--r-md);
  font-family: inherit; font-weight: 800; font-size: 17px; white-space: nowrap;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.2s ease;
}
.btn--sm { height: 44px; padding-inline: 20px; font-size: 15px; border-radius: 13px; }
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 5px 0 var(--navy); }
.btn--primary:hover { color: #fff; }
.btn--primary:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--navy); }
.btn--sm.btn--primary { box-shadow: 0 4px 0 var(--blue-deep); }
.btn--sm.btn--primary:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--blue-deep); }
.btn--white { background: #fff; color: var(--navy); box-shadow: 0 3px 0 rgba(30,58,95,0.18); }
.btn--white:hover { background: var(--paper); color: var(--navy); }
.btn--white:active { transform: translateY(3px); box-shadow: 0 1px 0 rgba(30,58,95,0.18); }
.btn--ghost { background: rgba(255,255,255,0.1); color: #fff; box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.55); }
.btn--ghost:hover { background: rgba(255,255,255,0.2); color: #fff; }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 800; color: var(--blue-deep); }
.link-arrow:hover { color: var(--navy); }

/* --------------------------- 6) Hero slider ----------------------------- */
.hero { position: relative; height: 100dvh; min-height: 620px; max-height: 980px; overflow: hidden; }
.hero__slides { position: absolute; inset: 0; }
.hero__slide { position: absolute; inset: 0; opacity: 0; transition: opacity 0.7s ease; }
.hero__slide.is-active { opacity: 1; }
.hero__slide img { width: 100%; height: 100%; object-fit: cover; }
.hero__overlay { position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(195deg, rgba(8,20,36,0.74) 0%, rgba(8,20,36,0.32) 45%, rgba(8,20,36,0.82) 100%); }
.hero__content {
  position: relative; z-index: 2; height: 100%; max-width: var(--container); margin-inline: auto;
  display: flex; flex-direction: column; justify-content: center;
  padding: 96px var(--gutter) 100px;
}
.hero__eyebrow { display: inline-flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 700; letter-spacing: 0.05em; color: var(--blue-soft); margin-bottom: 20px; }
.hero__eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--blue-soft); border-radius: 2px; }
.hero h1 { font-size: clamp(34px, 5.6vw, 64px); line-height: 1.08; color: #fff; margin-bottom: 18px; max-width: 760px; min-height: 1.08em; }
.hero__desc { font-size: clamp(16px, 2vw, 19px); line-height: 1.85; color: rgba(255,255,255,0.86); max-width: 560px; margin-bottom: 34px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero__controls { position: absolute; bottom: 32px; inset-inline: 0; z-index: 2; display: flex; align-items: center; justify-content: center; gap: 18px; }
.hero__arrow {
  display: flex; align-items: center; justify-content: center; width: 40px; height: 40px;
  border-radius: var(--r-sm); border: 1.5px solid rgba(255,255,255,0.4); background: rgba(255,255,255,0.1);
}
.hero__arrow:hover { background: rgba(255,255,255,0.2); }
.hero__dots { display: flex; gap: 8px; }
.hero__dot { width: 8px; height: 8px; padding: 0; border: none; border-radius: 5px; background: rgba(255,255,255,0.42); transition: width 0.25s, background 0.25s; }
.hero__dot.is-active { width: 22px; background: #fff; }

/* Keyword strip */
.keyword-strip { background: var(--navy); padding: 18px 0; }
.keyword-strip__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px 30px; }
.keyword-strip span.kw { color: var(--muted-3); font-size: 14px; font-weight: 600; }
.keyword-strip span.sep { color: var(--blue); }

/* --------------------------- 7) Cards ----------------------------------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm); transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.card--hover:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

/* Service card */
.service-card { padding: 28px; display: flex; flex-direction: column; }
.service-card__icon { display: flex; align-items: center; justify-content: center; width: 56px; height: 56px; border-radius: var(--r-md); margin-bottom: 20px; }
.service-card h3 { font-size: 21px; font-weight: 800; margin-bottom: 10px; }
.service-card p { font-size: 15px; line-height: 1.8; color: var(--muted); margin-bottom: 18px; flex: 1; }
.service-card .link-arrow { padding-top: 14px; border-top: 1px solid var(--line); }
.ic-1 { background: var(--tint-1); } .ic-2 { background: var(--tint-2); } .ic-3 { background: var(--tint-3); }

/* Project card */
.project-card { display: flex; flex-direction: column; overflow: hidden; }
.project-card__media { position: relative; height: 230px; background: var(--tint-img); overflow: hidden; }
.project-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s var(--ease); }
.project-card:hover .project-card__media img { transform: scale(1.05); }
.project-card__cat { position: absolute; top: 14px; inset-inline-end: 14px; background: rgba(255,255,255,0.92); backdrop-filter: blur(4px); padding: 5px 12px; border-radius: var(--r-full); font-size: 12.5px; font-weight: 700; color: var(--navy); }
.project-card__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.project-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.project-card__body p { font-size: 14.5px; line-height: 1.75; color: var(--muted); margin-bottom: 18px; flex: 1; }
.project-card__foot { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; border-top: 1px solid var(--line); }
.project-card__loc { font-size: 13px; font-weight: 600; color: var(--muted-2); }

/* Process */
.process-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.process-step { padding: 30px 26px; border-radius: var(--r-lg); background: #fff; border: 1px solid var(--line); }
.process-step__num { font-size: 48px; font-weight: 900; line-height: 1; color: var(--blue-soft); }
.process-step:nth-child(2) .process-step__num { color: var(--blue); }
.process-step:nth-child(3) .process-step__num { color: var(--muted-3); }
.process-step h3 { font-size: 19px; font-weight: 800; margin: 14px 0 9px; }
.process-step p { font-size: 14.5px; line-height: 1.8; color: var(--muted); }
.process-step--dark { background: var(--navy); border: none; }
.process-step--dark .process-step__num { color: var(--blue); }
.process-step--dark h3 { color: #fff; }
.process-step--dark p { color: #c0c0c8; }

/* About */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(32px, 5vw, 64px); align-items: center; }
.about-figure { position: relative; display: flex; justify-content: center; }
.about-figure__img { position: relative; width: 100%; max-width: 460px; aspect-ratio: 4/3; border-radius: var(--r-xl); overflow: hidden; box-shadow: var(--shadow-lg); background: var(--tint-img); }
.about-figure__img img { width: 100%; height: 100%; object-fit: cover; }
.about-badge { position: absolute; bottom: -20px; inset-inline-end: -12px; background: var(--blue); color: #fff; border-radius: var(--r-lg); padding: 18px 22px; box-shadow: 0 14px 30px rgba(44,92,138,0.4); }
.about-badge__num { font-size: 30px; font-weight: 900; line-height: 1; }
.about-badge__label { font-size: 13px; font-weight: 600; margin-top: 4px; }
.checklist { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-top: 26px; }
.checklist li { display: flex; align-items: center; gap: 11px; font-size: 15.5px; font-weight: 600; color: var(--navy); }
.checklist .tick { display: flex; flex: 0 0 auto; width: 28px; height: 28px; border-radius: 50%; background: var(--navy); align-items: center; justify-content: center; }

/* Stats row */
.stats { display: flex; flex-wrap: wrap; gap: clamp(20px, 4vw, 42px); }
.stat__num { font-size: 30px; font-weight: 900; line-height: 1; color: var(--navy); }
.stat__num span { color: var(--blue); }
.stat__label { font-size: 13.5px; color: var(--muted-2); font-weight: 600; margin-top: 6px; }
.stat-divider { width: 1px; background: var(--line-2); }

/* ----------------------------- 8) Forms --------------------------------- */
.form-card { background: #fff; border-radius: var(--r-xl); padding: clamp(24px, 3vw, 38px); box-shadow: 0 24px 50px rgba(0,0,0,0.25); }
.form-card__head { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.form-card__icon { display: flex; width: 46px; height: 46px; border-radius: 14px; align-items: center; justify-content: center; flex: 0 0 auto; }
.form-card__head h3 { font-size: 22px; font-weight: 900; }
.form-card > p { font-size: 14.5px; color: var(--muted-2); line-height: 1.7; margin-bottom: 22px; }
.form { display: flex; flex-direction: column; gap: 15px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 15px; }
.field { display: block; }
.field > span { display: block; font-weight: 600; font-size: 13.5px; color: #3b3d44; margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 0 15px; border: 1.5px solid #c0c0c8; border-radius: 13px; background: #fff;
  font-family: inherit; font-size: 15px; color: var(--navy); outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input, .field select { height: 48px; }
.field textarea { padding: 13px 15px; resize: vertical; min-height: 96px; line-height: 1.7; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--navy); box-shadow: 0 0 0 3px rgba(40,56,80,0.14);
}
.form-success { text-align: center; padding: 34px 16px; }
.form-success__icon { display: inline-flex; width: 64px; height: 64px; border-radius: 50%; align-items: center; justify-content: center; margin-bottom: 18px; }
.form-success h4 { font-size: 21px; font-weight: 900; margin-bottom: 8px; }
.form-success p { font-size: 15px; color: var(--muted); line-height: 1.8; }

/* ----------------------------- 9) Footer -------------------------------- */
.site-footer { background: var(--navy-ink); color: #c0c0c8; padding: clamp(48px, 7vw, 80px) 0 32px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 36px; padding-bottom: 42px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand { max-width: 300px; }
.footer-logo { display: flex; align-items: center; gap: 11px; margin-bottom: 16px; }
.footer-logo__mark { width: 42px; height: 42px; border-radius: 13px; background: var(--blue); display: flex; align-items: center; justify-content: center; }
.footer-logo__name { font-weight: 900; font-size: 22px; color: #fff; }
.footer-brand p { font-size: 14.5px; line-height: 1.85; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 800; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; font-size: 14.5px; }
.footer-col a:hover { color: var(--blue-soft); }
.footer-contact li { display: flex; align-items: center; gap: 10px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; font-size: 13px; color: var(--muted-2); }

/* ---------------------------- 10) Page hero ----------------------------- */
/* Inner-page compact hero (non-home) */
.page-hero { position: relative; background: var(--navy); color: #fff; padding: calc(var(--header-h) + clamp(48px, 7vw, 92px)) 0 clamp(48px, 7vw, 88px); overflow: hidden; }
.page-hero::after { content: ""; position: absolute; top: -140px; inset-inline-start: -120px; width: 480px; height: 480px; border-radius: 50%; background: radial-gradient(circle, rgba(44,92,138,0.35), transparent 70%); pointer-events: none; }
.page-hero .container { position: relative; z-index: 1; }
.page-hero .eyebrow { color: var(--blue-soft); }
.page-hero h1 { font-size: clamp(32px, 5.5vw, 58px); margin: 16px 0 16px; color: #fff; max-width: 760px; }
.page-hero p { max-width: 620px; font-size: clamp(16px, 2vw, 19px); line-height: 1.85; color: rgba(255,255,255,0.82); }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 600; color: rgba(255,255,255,0.7); margin-bottom: 22px; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: 0.5; }

/* Fill space under fixed header on solid inner pages */
.has-fixed-header { padding-top: var(--header-h); }

/* --------------------------- 11) Blog / Article ------------------------- */
.article-card { display: flex; flex-direction: column; overflow: hidden; }
.article-card__media { position: relative; height: 210px; background: var(--tint-img); overflow: hidden; }
.article-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s var(--ease); }
.article-card:hover .article-card__media img { transform: scale(1.05); }
.article-card__tag { position: absolute; top: 14px; inset-inline-end: 14px; background: var(--navy); color: #fff; padding: 5px 12px; border-radius: var(--r-full); font-size: 12px; font-weight: 700; }
.article-card__body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.article-card__meta { font-size: 12.5px; color: var(--muted-2); font-weight: 600; margin-bottom: 10px; display: flex; gap: 10px; }
.article-card h3 { font-size: 19px; font-weight: 800; line-height: 1.4; margin-bottom: 10px; }
.article-card__body p { font-size: 14px; line-height: 1.75; color: var(--muted); margin-bottom: 16px; flex: 1; }

.prose { max-width: 720px; margin-inline: auto; }
.prose h2 { font-size: clamp(24px, 3.4vw, 32px); margin: 40px 0 16px; }
.prose h3 { font-size: 21px; margin: 30px 0 12px; }
.prose p { font-size: 17px; line-height: 1.95; color: var(--muted); margin-bottom: 20px; }
.prose ul.bullets { margin: 0 0 20px; display: flex; flex-direction: column; gap: 12px; }
.prose ul.bullets li { position: relative; padding-inline-start: 26px; font-size: 17px; line-height: 1.85; color: var(--muted); }
.prose ul.bullets li::before { content: ""; position: absolute; inset-inline-start: 4px; top: 12px; width: 9px; height: 9px; border-radius: 50%; background: var(--blue); }
.prose blockquote { margin: 28px 0; padding: 20px 24px; border-inline-start: 4px solid var(--blue); background: var(--tint-1); border-radius: 0 var(--r-md) var(--r-md) 0; font-size: 18px; font-weight: 600; color: var(--navy); line-height: 1.8; }
.article-lead-img { width: 100%; aspect-ratio: 16/9; border-radius: var(--r-xl); overflow: hidden; box-shadow: var(--shadow-lg); background: var(--tint-img); margin-bottom: clamp(32px, 5vw, 48px); }
.article-lead-img img { width: 100%; height: 100%; object-fit: cover; }
.article-author { display: flex; align-items: center; gap: 12px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.article-author__avatar { width: 52px; height: 52px; border-radius: 50%; background: var(--tint-1); display: flex; align-items: center; justify-content: center; font-weight: 800; color: var(--navy); flex: 0 0 auto; }
.article-author__name { font-weight: 800; color: var(--navy); }
.article-author__role { font-size: 13.5px; color: var(--muted-2); }

/* Detail (single project) */
.detail-hero-img { position: relative; width: 100%; aspect-ratio: 16/9; border-radius: var(--r-xl); overflow: hidden; box-shadow: 0 28px 56px rgba(40,56,80,0.2); background: var(--tint-img); margin: clamp(32px,5vw,52px) 0; }
.detail-hero-img img { width: 100%; height: 100%; object-fit: cover; }
.detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: clamp(28px, 4vw, 52px); align-items: start; }
.detail-body h2 { font-size: 24px; margin-bottom: 16px; }
.detail-body p { font-size: 16.5px; line-height: 1.95; color: var(--muted); margin-bottom: 18px; }
.spec-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px; }
.spec-card h3 { font-size: 14px; font-weight: 800; letter-spacing: 0.04em; color: var(--muted-2); margin-bottom: 18px; }
.spec-list { display: flex; flex-direction: column; gap: 16px; }
.spec-item { display: flex; align-items: center; gap: 12px; }
.spec-item__icon { display: flex; flex: 0 0 auto; width: 38px; height: 38px; border-radius: 11px; background: #fff; border: 1px solid var(--line); align-items: center; justify-content: center; }
.spec-item__k { font-size: 12.5px; color: var(--muted-2); font-weight: 600; }
.spec-item__v { font-size: 15.5px; font-weight: 700; color: var(--navy); margin-top: 2px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--navy); color: #fff; font-size: 13px; font-weight: 600; padding: 6px 13px; border-radius: var(--r-full); }
.divider { height: 1px; background: var(--line); margin: 22px 0; }
.detail-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; margin-top: clamp(36px, 5vw, 56px); }
.detail-gallery figure { margin: 0; aspect-ratio: 4/3; border-radius: var(--r-lg); overflow: hidden; background: var(--tint-img); box-shadow: 0 12px 28px rgba(40,56,80,0.12); }
.detail-gallery img { width: 100%; height: 100%; object-fit: cover; }
.detail-nav { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: clamp(40px, 5vw, 60px); padding-top: 28px; border-top: 1px solid var(--line-2); }
.detail-nav a { display: inline-flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 700; color: var(--navy); }
.detail-nav a:hover { color: var(--blue); }
.cta-band { margin-top: clamp(40px, 5vw, 60px); background: var(--navy); border-radius: var(--r-xl); padding: clamp(32px, 5vw, 52px); text-align: center; }
.cta-band h3 { font-size: clamp(24px, 3.6vw, 36px); color: #fff; margin-bottom: 12px; }
.cta-band p { font-size: 16.5px; color: #c0c0c8; line-height: 1.8; margin: 0 auto 26px; max-width: 480px; }

/* Filter chips (portfolio/blog) */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.filter-btn { height: 42px; padding-inline: 18px; border-radius: var(--r-full); border: 1.5px solid var(--line-2); background: #fff; font-family: inherit; font-size: 14px; font-weight: 700; color: var(--muted); transition: all 0.18s ease; }
.filter-btn:hover { border-color: var(--blue); color: var(--blue); }
.filter-btn.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.is-hidden { display: none !important; }

/* --------------------------- 12) Error pages ---------------------------- */
.error-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 100px var(--gutter) 60px; position: relative; overflow: hidden; background: var(--paper); }
.error-page::before { content: ""; position: absolute; top: -180px; inset-inline-end: -140px; width: 520px; height: 520px; border-radius: 50%; background: radial-gradient(circle, rgba(44,92,138,0.14), transparent 70%); }
.error-inner { position: relative; z-index: 1; max-width: 560px; }
.error-code { font-size: clamp(90px, 20vw, 190px); font-weight: 900; line-height: 0.9; letter-spacing: -0.04em; color: var(--navy); }
.error-code span { color: var(--blue); }
.error-tag { display: inline-block; margin-bottom: 22px; background: var(--tint-1); color: var(--blue-deep); font-weight: 700; font-size: 13px; letter-spacing: 0.04em; padding: 7px 16px; border-radius: var(--r-full); }
.error-page h1 { font-size: clamp(26px, 4vw, 40px); margin: 10px 0 14px; }
.error-page p { font-size: 17px; color: var(--muted); line-height: 1.85; margin-bottom: 30px; }
.error-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.error-links { margin-top: 34px; display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; font-size: 14.5px; font-weight: 600; }
.error-links a { color: var(--blue-deep); }
.error-links a:hover { color: var(--navy); }

/* ---------------------------- 13) Responsive ---------------------------- */
@media (max-width: 980px) {
  .detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 880px) {
  .nav-links, .header-actions .btn { display: none; }
  .burger { display: inline-flex; }
}
@media (max-width: 640px) {
  .hero { min-height: 560px; }
  .hero__content { padding-top: 84px; padding-bottom: 96px; }
  .hero__controls { bottom: 20px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .btn { width: 100%; }
  .hero__cta .btn, .error-actions .btn, .cta-band .btn { width: auto; }
}
@media (max-width: 420px) {
  .hero { min-height: 520px; }
  .hero__content { padding-top: 76px; padding-bottom: 88px; }
  .error-actions .btn { width: 100%; }
}

/* ----------------------------- 14) Motion ------------------------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}