/* ============================================================
   TECHLY® — moban14  Architecture Portfolio
   White space, hairline rules, serif display type, sage #A3B18A
   ============================================================ */
:root {
  --white: #ffffff;
  --ink: #1a1a1a;
  --gray: #ededed;
  --muted: #8a8a85;
  --sage: #a3b18a;
  --line: #e2e2de;
  --container: 1240px;
  --serif: Georgia, "Times New Roman", "SimSun", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--white); color: var(--ink); line-height: 1.75; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
.container { width: min(var(--container), calc(100% - 60px)); margin: 0 auto; }

/* ---------- Minimal header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 0; }
.brand { font-weight: 700; font-size: 20px; letter-spacing: 6px; }
.brand small { display: block; font-size: 10px; font-weight: 500; letter-spacing: 3px; color: var(--muted); }
.site-nav { display: flex; gap: 30px; }
.site-nav a { font-size: 13px; font-weight: 600; letter-spacing: 1.5px; color: var(--muted); position: relative; }
.site-nav a.active { color: var(--ink); }
.site-nav a.active::before, .site-nav a:hover::before { content: ""; position: absolute; left: 0; bottom: -6px; width: 6px; height: 6px; border-radius: 50%; background: var(--sage); }
.nav-toggle { display: none; background: none; border: 1px solid var(--ink); border-radius: 0; padding: 10px 14px; font-size: 13px; letter-spacing: 2px; font-weight: 700; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { position: relative; height: 86vh; min-height: 560px; }
.hero img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(0.25); }
.hero-cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 60px 0 44px; background: linear-gradient(transparent, rgba(20,20,18,0.85)); color: #fff; }
.hero-cap .no { font-size: 13px; letter-spacing: 4px; color: #d9d9d2; }
.hero-cap h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 6vw, 74px); line-height: 1.05; margin: 10px 0; }
.hero-cap p { color: rgba(255,255,255,0.8); max-width: 660px; font-size: 15px; }

/* ---------- Section shells ---------- */
.section { padding: 96px 0; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; margin-bottom: 48px; }
.section-head .num { font-size: 13px; letter-spacing: 3px; color: var(--sage); }
.section-head h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(30px, 4.5vw, 54px); line-height: 1.08; }
.section-head p { color: var(--muted); max-width: 480px; }

/* ---------- Asymmetric gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: 22px; }
.g-item { position: relative; overflow: hidden; background: var(--gray); }
.g-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.g-item:hover img { transform: scale(1.04); }
.g-item .cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 30px 22px 20px; background: linear-gradient(transparent, rgba(20,20,18,0.9)); color: #fff; transform: translateY(100%); transition: transform .45s ease; }
.g-item:hover .cap { transform: translateY(0); }
.g-item .cap b { font-family: var(--serif); font-weight: 400; font-size: 20px; }
.g-item .cap span { display: block; font-size: 11px; letter-spacing: 2px; color: #d9d9d2; }
.g-1 { grid-column: span 6; grid-row: span 2; min-height: 520px; }
.g-2 { grid-column: span 6; grid-row: span 1; min-height: 250px; }
.g-3 { grid-column: span 3; grid-row: span 1; min-height: 250px; }
.g-4 { grid-column: span 3; grid-row: span 1; min-height: 250px; }
.g-5 { grid-column: span 12; grid-row: span 1; min-height: 400px; }

/* ---------- Philosophy split ---------- */
.philo { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: start; }
.philo h3 { font-family: var(--serif); font-weight: 400; font-size: clamp(26px, 3.6vw, 44px); line-height: 1.15; }
.philo .text { display: grid; gap: 20px; }
.philo p { color: var(--muted); }
.philo .rule { width: 100%; height: 1px; background: var(--line); margin: 30px 0; }

/* ---------- Numbered project list ---------- */
.proj-list { border-top: 1px solid var(--line); }
.proj-row { display: grid; grid-template-columns: 120px 1fr 1.2fr 120px; gap: 30px; align-items: center; padding: 30px 8px; border-bottom: 1px solid var(--line); transition: background .3s; }
.proj-row:hover { background: var(--gray); }
.proj-row .no { font-family: var(--serif); font-size: 40px; color: var(--sage); }
.proj-row h3 { font-family: var(--serif); font-weight: 400; font-size: 26px; }
.proj-row p { color: var(--muted); font-size: 14px; }
.proj-row .yr { text-align: right; font-size: 13px; letter-spacing: 2px; color: var(--muted); }

/* ---------- Quote ---------- */
.quote { text-align: center; padding: 110px 0; }
.quote .q { font-family: var(--serif); font-size: clamp(26px, 4.5vw, 52px); font-weight: 400; line-height: 1.25; max-width: 900px; margin: 0 auto 26px; }
.quote .by { font-size: 12px; letter-spacing: 4px; color: var(--muted); text-transform: uppercase; }

/* ---------- Buttons ---------- */
.btn { display: inline-block; padding: 15px 34px; border: 1px solid var(--ink); font-size: 13px; letter-spacing: 2px; font-weight: 700; text-transform: uppercase; transition: all .25s; cursor: pointer; }
.btn--ink { background: var(--ink); color: #fff; }
.btn--ink:hover { background: var(--sage); border-color: var(--sage); }
.btn--line:hover { background: var(--ink); color: #fff; }

/* ---------- Inner pages ---------- */
.page-head { padding: 90px 0 30px; }
.page-head .no { font-size: 13px; letter-spacing: 3px; color: var(--sage); }
.page-head h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(38px, 6vw, 72px); line-height: 1.05; margin: 12px 0 18px; }
.page-head p { color: var(--muted); max-width: 700px; }
.page-body { padding: 20px 0 110px; }

/* services — numbered list */
.svc-row { display: grid; grid-template-columns: 120px 1fr 1.4fr; gap: 30px; padding: 34px 8px; border-bottom: 1px solid var(--line); align-items: start; }
.svc-row .no { font-family: var(--serif); font-size: 40px; color: var(--sage); }
.svc-row h3 { font-family: var(--serif); font-weight: 400; font-size: 28px; }
.svc-row p { color: var(--muted); font-size: 15px; }
.svc-row .tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.tag { border: 1px solid var(--line); padding: 5px 14px; font-size: 11px; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; }

/* about timeline */
.tl { border-left: 1px solid var(--ink); margin-left: 8px; padding-left: 34px; display: grid; gap: 40px; }
.tl li { position: relative; }
.tl li::before { content: ""; position: absolute; left: -40px; top: 6px; width: 10px; height: 10px; border: 1px solid var(--sage); border-radius: 50%; background: #fff; }
.tl .yr { font-size: 12px; letter-spacing: 3px; color: var(--sage); }
.tl h3 { font-family: var(--serif); font-weight: 400; font-size: 26px; margin: 6px 0; }
.tl p { color: var(--muted); max-width: 640px; }

/* insights */
.art-row { display: grid; grid-template-columns: 160px 1fr; gap: 30px; padding: 32px 8px; border-bottom: 1px solid var(--line); }
.art-row .d { font-size: 12px; letter-spacing: 3px; color: var(--muted); text-transform: uppercase; }
.art-row h3 { font-family: var(--serif); font-weight: 400; font-size: 26px; }
.art-row h3 a:hover { color: var(--sage); }
.art-row p { color: var(--muted); font-size: 15px; max-width: 720px; }

/* FAQ */
.faq-list { max-width: 900px; border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--line); padding: 26px 8px; }
.faq-item button { width: 100%; background: none; border: 0; font: inherit; text-align: left; display: flex; justify-content: space-between; gap: 20px; font-family: var(--serif); font-size: 23px; cursor: pointer; }
.faq-item button::after { content: "+"; font-family: var(--sans); color: var(--sage); font-size: 26px; }
.faq-item.open button::after { content: "−"; }
.faq-answer { display: none; padding-top: 14px; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 80px; align-items: start; }
.c-line { padding: 18px 8px; border-bottom: 1px solid var(--line); }
.c-line b { display: block; font-size: 11px; letter-spacing: 3px; color: var(--sage); text-transform: uppercase; }
.c-line p { font-family: var(--serif); font-size: 22px; margin-top: 4px; }
.contact-form { border-top: 1px solid var(--ink); display: grid; gap: 20px; }
.contact-form label { display: grid; gap: 8px; font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 14px 16px; border: 1px solid var(--line); border-radius: 0; background: var(--white); font: inherit; }
.contact-form input:focus, .contact-form textarea:focus { outline: 1px solid var(--sage); }
.contact-form textarea { min-height: 150px; }
.status-text { min-height: 22px; color: var(--sage); font-weight: 700; font-size: 13px; letter-spacing: 1px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 3px solid var(--ink); padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr; gap: 50px; }
.footer-title { font-size: 11px; letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px; }
.footer-links { display: grid; gap: 10px; color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: var(--ink); }
.footer-note { margin-top: 50px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 13px; letter-spacing: 1px; }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .site-nav { display: none; position: absolute; right: 30px; top: 62px; width: min(300px, calc(100% - 60px)); background: #fff; border: 1px solid var(--line); padding: 20px; flex-direction: column; gap: 14px; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: inline-flex; }
  .section-head, .philo, .contact-grid, .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .g-1, .g-2, .g-3, .g-4 { grid-column: span 12; min-height: 300px; }
  .proj-row, .svc-row, .art-row { grid-template-columns: 1fr; gap: 10px; }
  .proj-row .yr { text-align: left; }
}