/* ===========================================================
   La Montagna Digital — 2026 redesign
   Warm editorial "atelier" theme · Light + Dark
   Toggle theme via [data-theme="light"|"dark"] on <html>
   =========================================================== */

:root {
  /* Brand accents — shared across both themes */
  --moss:        #5d6f4f;
  --moss-dark:   #35422f;
  --gold:        #c59b59;
  --terracotta:  #b76948;

  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --max: 1180px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- LIGHT THEME (default) ---------- */
:root, :root[data-theme="light"] {
  --ink:        #141414;   /* primary text */
  --ink-soft:   #34312d;
  --bg:         #f5f1ea;   /* page background (stone) */
  --bg-2:       #eee3d3;   /* deeper stone */
  --surface:    #fffaf1;   /* cards (cream) */
  --surface-2:  rgba(255, 250, 241, 0.64);
  --line:       rgba(20, 20, 20, 0.12);
  --muted:      rgba(20, 20, 20, 0.66);
  --hero-grad:  radial-gradient(circle at 18% 20%, rgba(197,155,89,.35), transparent 32%),
                radial-gradient(circle at 78% 22%, rgba(93,111,79,.28), transparent 34%),
                linear-gradient(180deg, #f8f2e8 0%, #eee3d3 100%);
  --shadow:     0 30px 80px rgba(20, 20, 20, 0.12);
  --shadow-sm:  0 18px 45px rgba(20, 20, 20, 0.06);
  --grain-blend: multiply;
  --grain-opacity: 0.30;
  /* "ink" surfaces (nav, dark bands) stay dark in light mode */
  --band-bg:    #141414;
  --band-text:  #fffaf1;
  --band-muted: rgba(255, 250, 241, 0.68);
  --on-accent:  #fffaf1;
}

/* ---------- WARM DARK THEME ---------- */
:root[data-theme="dark"] {
  --ink:        #f3ece0;   /* primary text (warm off-white) */
  --ink-soft:   #d8cdbb;
  --bg:         #14110d;   /* espresso */
  --bg-2:       #1c1812;
  --surface:    #221d16;   /* warm card */
  --surface-2:  rgba(255, 250, 241, 0.05);
  --line:       rgba(243, 236, 224, 0.14);
  --muted:      rgba(243, 236, 224, 0.62);
  --hero-grad:  radial-gradient(circle at 18% 20%, rgba(197,155,89,.30), transparent 34%),
                radial-gradient(circle at 78% 22%, rgba(93,111,79,.26), transparent 36%),
                linear-gradient(180deg, #1c1812 0%, #14110d 100%);
  --shadow:     0 30px 80px rgba(0, 0, 0, 0.55);
  --shadow-sm:  0 18px 45px rgba(0, 0, 0, 0.35);
  --grain-blend: overlay;
  --grain-opacity: 0.22;
  /* bands invert to a warm cream so they still read as a contrast moment */
  --band-bg:    #0e0c09;
  --band-text:  #f3ece0;
  --band-muted: rgba(243, 236, 224, 0.6);
  --on-accent:  #14110d;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  overflow-x: hidden;
  transition: background .5s var(--ease), color .5s var(--ease);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.page-shell { position: relative; min-height: 100vh; overflow: hidden; }

/* Grain overlay */
.grain {
  pointer-events: none; position: fixed; inset: 0;
  opacity: var(--grain-opacity); mix-blend-mode: var(--grain-blend); z-index: 50;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 240 240' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.18'/%3E%3C/svg%3E");
}

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; letter-spacing: -0.06em; line-height: 0.95; margin: 0; }
.serif { font-family: Georgia, "Times New Roman", serif; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 18px; left: 50%; transform: translateX(-50%);
  width: min(calc(100% - 32px), var(--max)); z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px 12px 22px; border: 1px solid rgba(255,250,241,0.46);
  border-radius: 999px; background: rgba(20,20,20,0.72); backdrop-filter: blur(20px);
  color: var(--band-text); box-shadow: 0 18px 50px rgba(20,20,20,0.18);
  transition: background .4s var(--ease);
}
:root[data-theme="dark"] .nav { background: rgba(8,7,5,0.72); border-color: rgba(243,236,224,0.18); }
.nav.scrolled { background: rgba(20,20,20,0.86); }
:root[data-theme="dark"] .nav.scrolled { background: rgba(8,7,5,0.9); }

.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: -0.03em; }
.brand-mark { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--gold), var(--terracotta)); position: relative; overflow: hidden; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.45); flex: none; }
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; left: 7px; bottom: 8px; width: 22px; height: 16px; background: #fffaf1; clip-path: polygon(0 100%, 42% 20%, 62% 56%, 78% 0, 100% 100%); opacity: 0.92; }
.brand-mark::after { transform: translate(4px,4px) scale(0.78); background: var(--moss-dark); opacity: 0.72; }

.nav-links { display: flex; align-items: center; gap: 24px; font-size: 14px; color: rgba(255,250,241,0.82); }
.nav-links a { transition: color .25s; }
.nav-links a:hover, .nav-links a.active { color: #fffaf1; }

.nav-right { display: flex; align-items: center; gap: 12px; }

/* Theme toggle */
.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%; flex: none;
  border: 1px solid rgba(255,250,241,0.28); background: rgba(255,250,241,0.08);
  color: #fffaf1; cursor: pointer; display: grid; place-items: center;
  transition: background .25s, transform .25s var(--ease); font-size: 16px;
}
.theme-toggle:hover { background: rgba(255,250,241,0.18); transform: rotate(12deg); }
.theme-toggle .i-sun { display: none; }
.theme-toggle .i-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: transform .25s var(--ease), box-shadow .25s, background .25s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: var(--band-text); background: var(--band-bg); box-shadow: 0 18px 35px rgba(20,20,20,0.18); }
.btn-secondary { color: var(--ink); background: var(--surface-2); border-color: var(--line); }
.btn-nav { min-height: 40px; padding: 0 17px; color: #141414; background: #fffaf1; font-size: 14px; }
.btn-gold { background: var(--gold); color: #141414; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; padding: 150px 20px 80px; background: var(--hero-grad); }
.hero::after { content: ""; position: absolute; inset: auto -8% -1px -8%; height: 160px; background: var(--bg); clip-path: polygon(0 46%, 18% 58%, 38% 28%, 56% 56%, 74% 22%, 100% 54%, 100% 100%, 0 100%); opacity: 0.92; }
.hero-grid { width: min(100%, var(--max)); margin: 0 auto; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 44px; align-items: center; position: relative; z-index: 2; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 24px; padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); color: var(--moss-dark); font-size: 13px; font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase; }
:root[data-theme="dark"] .eyebrow { color: var(--gold); }
.pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--moss); box-shadow: 0 0 0 6px rgba(93,111,79,0.14); }
h1 { max-width: 780px; font-size: clamp(56px, 8vw, 104px); line-height: 0.9; letter-spacing: -0.075em; color: var(--ink); }
.hero-copy { max-width: 600px; margin: 28px 0 0; font-size: clamp(18px, 2vw, 22px); color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 42px; max-width: 650px; }
.stat { padding: 18px; border-radius: 22px; background: var(--surface-2); border: 1px solid var(--line); }
.stat strong { display: block; font-size: 25px; letter-spacing: -0.04em; }
.stat span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }

/* Hero visual card (stays dark in both themes — it's a "screen") */
.visual-card { position: relative; min-height: 610px; border-radius: var(--radius-xl); background: linear-gradient(140deg, rgba(20,20,20,0.94), rgba(52,66,47,0.9)), #141414; box-shadow: var(--shadow); overflow: hidden; color: #fffaf1; border: 1px solid rgba(255,250,241,0.24); }
.visual-card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 72% 18%, rgba(197,155,89,0.35), transparent 26%), radial-gradient(circle at 22% 80%, rgba(183,105,72,0.3), transparent 28%); }
.keyword-orbit { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0.9; }
.orbit-ring { position: absolute; border: 1px solid rgba(255,250,241,0.14); border-radius: 50%; animation: spin 28s linear infinite; }
.ring-1 { width: 430px; height: 430px; }
.ring-2 { width: 310px; height: 310px; animation-direction: reverse; animation-duration: 20s; }
.ring-3 { width: 190px; height: 190px; animation-duration: 16s; }
@keyframes spin { to { transform: rotate(360deg); } }
.keyword { position: absolute; padding: 9px 12px; border-radius: 999px; background: rgba(255,250,241,0.1); border: 1px solid rgba(255,250,241,0.18); color: rgba(255,250,241,0.9); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; backdrop-filter: blur(12px); }
.k1 { top: 72px; left: 52px; } .k2 { top: 144px; right: 38px; } .k3 { bottom: 178px; left: 38px; } .k4 { bottom: 78px; right: 58px; }
.k5 { top: 52%; left: 50%; transform: translate(-50%,-50%); background: #fffaf1; color: #141414; }
.browser-card { position: absolute; left: 36px; right: 36px; bottom: 34px; padding: 18px; border-radius: 24px; background: rgba(255,250,241,0.95); color: #141414; box-shadow: 0 28px 60px rgba(0,0,0,0.22); }
.browser-top { display: flex; gap: 7px; margin-bottom: 16px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #e7ddce; }
.browser-row { display: grid; grid-template-columns: 1fr 0.65fr; gap: 12px; }
.mock-block { min-height: 126px; border-radius: 18px; background: linear-gradient(135deg, var(--moss), var(--moss-dark)); padding: 18px; color: #fffaf1; }
.mock-block h3 { font-size: 30px; line-height: 0.98; }
.mock-lines { display: grid; gap: 9px; }
.mock-lines span { display: block; height: 13px; border-radius: 999px; background: rgba(20,20,20,0.12); }
.mock-lines span:nth-child(1){width:92%;} .mock-lines span:nth-child(2){width:74%;} .mock-lines span:nth-child(3){width:86%;} .mock-lines span:nth-child(4){width:52%; background: var(--gold);}

/* ---------- Sections ---------- */
.section { padding: 110px 20px; position: relative; }
.container { width: min(100%, var(--max)); margin: 0 auto; }
.section-head { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: end; margin-bottom: 42px; }
.section-label { color: var(--terracotta); font-size: 13px; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }
:root[data-theme="dark"] .section-label { color: var(--gold); }
h2 { margin: 10px 0 0; font-size: clamp(38px, 5vw, 68px); line-height: 0.95; letter-spacing: -0.06em; }
.section-intro { margin: 0; color: var(--muted); font-size: 18px; max-width: 570px; }

/* Page hero (interior pages) */
.page-hero { position: relative; padding: 170px 20px 70px; background: var(--hero-grad); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(46px, 7vw, 92px); }
.page-hero .hero-copy { max-width: 640px; }

/* Logo / industry strip */
.logo-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.logo-tile { display: grid; place-items: center; min-height: 96px; padding: 18px; border-radius: 22px; background: var(--surface-2); border: 1px solid var(--line); color: var(--muted); font-weight: 700; text-align: center; }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.service-card { padding: 26px; min-height: 285px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: transform .28s var(--ease), box-shadow .28s; }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.service-icon { width: 48px; height: 48px; border-radius: 16px; display: grid; place-items: center; color: #fffaf1; background: var(--moss-dark); margin-bottom: 28px; font-size: 20px; }
.service-card:nth-child(2) .service-icon { background: var(--terracotta); }
.service-card:nth-child(3) .service-icon { background: var(--gold); color: #141414; }
.service-card:nth-child(4) .service-icon { background: var(--ink); color: var(--bg); }
.service-card h3 { margin: 0 0 12px; font-size: 22px; letter-spacing: -0.035em; }
.service-card p { margin: 0; color: var(--muted); }

/* Dark band (contrast section) */
.dark-band { background: var(--band-bg); color: var(--band-text); border-radius: 44px 44px 0 0; margin-top: 20px; }
.dark-band h2, .dark-band .stat strong { color: var(--band-text); }
.dark-band .section-intro, .dark-band .stat span { color: var(--band-muted); }
.dark-band .stat { background: rgba(255,250,241,0.06); border-color: rgba(255,250,241,0.13); }

/* Process */
.process { display: grid; gap: 14px; counter-reset: step; }
.process-step { counter-increment: step; display: grid; grid-template-columns: 90px 0.75fr 1.25fr; gap: 24px; align-items: center; padding: 24px; border-radius: 28px; background: rgba(255,250,241,0.07); border: 1px solid rgba(255,250,241,0.13); }
.process-step::before { content: "0" counter(step); width: 62px; height: 62px; display: grid; place-items: center; border-radius: 50%; background: var(--gold); color: #141414; font-weight: 800; }
.process-step h3 { margin: 0; font-size: 25px; letter-spacing: -0.04em; color: var(--band-text); }
.process-step p { margin: 0; color: var(--band-muted); }

/* Portfolio / case cards */
.portfolio-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 18px; }
.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.case-card { position: relative; min-height: 430px; padding: 28px; border-radius: var(--radius-xl); overflow: hidden; color: #fffaf1; background: linear-gradient(135deg, var(--moss-dark), #1d211b); box-shadow: var(--shadow); display: flex; flex-direction: column; }
.case-card.small { min-height: 206px; background: linear-gradient(135deg, var(--terracotta), #532b22); }
.case-card.cocoa { background: linear-gradient(135deg, #40372d, #171411); }
.case-card.gold { background: linear-gradient(135deg, var(--gold), #8a6322); }
.case-card.moss { background: linear-gradient(135deg, var(--moss), var(--moss-dark)); }
.case-card::after { content: ""; position: absolute; right: -70px; bottom: -100px; width: 260px; height: 260px; border-radius: 50%; background: rgba(255,250,241,0.12); }
.case-tag { display: inline-flex; align-self: flex-start; padding: 8px 12px; border-radius: 999px; background: rgba(255,250,241,0.12); border: 1px solid rgba(255,250,241,0.18); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.case-card h3 { position: relative; z-index: 1; max-width: 520px; margin: auto 0 0; padding-top: 110px; font-size: clamp(30px, 4vw, 52px); line-height: 0.95; }
.case-card.small h3 { padding-top: 40px; font-size: 28px; }
.case-card p { position: relative; z-index: 1; max-width: 480px; color: rgba(255,250,241,0.78); margin: 14px 0 0; }
.case-card .work-link { position: relative; z-index: 1; margin-top: 16px; font-weight: 700; color: #fffaf1; display: inline-flex; gap: 8px; }
.case-stack { display: grid; gap: 18px; }

/* CTA */
.cta { padding: 100px 20px; background: radial-gradient(circle at 22% 20%, rgba(197,155,89,0.3), transparent 32%), linear-gradient(135deg, var(--surface), var(--bg-2)); }
.cta-card { width: min(100%, var(--max)); margin: 0 auto; padding: clamp(34px,7vw,76px); border-radius: 42px; background: var(--band-bg); color: var(--band-text); position: relative; overflow: hidden; box-shadow: var(--shadow); }
.cta-card::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent, rgba(197,155,89,0.16)); }
.cta-content { position: relative; z-index: 2; max-width: 780px; }
.cta h2 { color: var(--band-text); }
.cta p { color: var(--band-muted); font-size: 20px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 50px; align-items: start; }
.contact-detail { margin-bottom: 26px; }
.contact-detail .section-label { margin-bottom: 6px; }
.contact-detail a { font-size: 22px; font-family: Georgia, serif; letter-spacing: -0.03em; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 8px; font-weight: 600; letter-spacing: 0.02em; }
.field input, .field textarea, .field select { width: 100%; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; color: var(--ink); font-family: inherit; font-size: 16px; transition: border-color .3s; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--moss); }

/* Footer */
.footer { padding: 40px 20px; background: var(--band-bg); color: var(--band-muted); font-size: 14px; }
.footer-inner { width: min(100%, var(--max)); margin: 0 auto; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
.footer a { color: var(--band-muted); transition: color .25s; }
.footer a:hover { color: var(--band-text); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* Load-more: hidden work cards */
.case-card.is-hidden { display: none; }

/* Long-form / legal prose */
.prose { max-width: 760px; }
.prose h2 { font-size: clamp(26px, 3.4vw, 38px); margin: 44px 0 14px; }
.prose h3 { font-size: 22px; margin: 30px 0 10px; letter-spacing: -0.03em; }
.prose p, .prose li { color: var(--muted); font-size: 17px; line-height: 1.7; }
.prose ul { padding-left: 20px; margin: 12px 0; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--terracotta); text-decoration: underline; text-underline-offset: 3px; }
:root[data-theme="dark"] .prose a { color: var(--gold); }
.prose .meta { font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }

/* Centered 404 */
.error-wrap { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 160px 20px 80px; }
.error-wrap h1 { font-size: clamp(80px, 18vw, 200px); line-height: 0.85; }
.error-wrap p { color: var(--muted); font-size: 20px; margin: 18px 0 30px; max-width: 46ch; }

/* Responsive */
@media (max-width: 980px) {
  .hero-grid, .section-head, .portfolio-grid, .contact-grid { grid-template-columns: 1fr; }
  .visual-card { min-height: 520px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-strip { grid-template-columns: repeat(3, 1fr); }
  .work-grid { grid-template-columns: 1fr; }
  .process-step { grid-template-columns: 70px 1fr; }
  .process-step p { grid-column: 2; }
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .hero { padding-top: 125px; }
  .services-grid, .hero-stats, .logo-strip { grid-template-columns: 1fr; }
  .visual-card { min-height: 480px; }
  .browser-card { left: 18px; right: 18px; }
  .browser-row { grid-template-columns: 1fr; }
  .section { padding: 78px 20px; }
  .process-step { grid-template-columns: 1fr; }
  .process-step p { grid-column: auto; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
