/* ============================================================
   K-Ohm — Public Face
   Night Sky · Glassmorphism · Electric Gold
   Vanilla CSS. No framework. GPU-friendly transforms only.
   ============================================================ */

@import url('./tokens.css');

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text-100);
  background:
    /* Aurora wash: gold top-right + orange bottom-left, faint */
    radial-gradient(1200px 600px at 85% -10%, var(--gold-glow), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, var(--orange-glow), transparent 55%),
    linear-gradient(180deg, var(--ink-950) 0%, hsl(220, 45%, 3%) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.011em;
  overflow-x: hidden;
}

/* ——— Starfield — pure CSS, single element, additive ————————— */
body::before {
  content: "";
  position: fixed; inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, hsla(0,0%,100%,.8), transparent 50%),
    radial-gradient(1px 1px at 70% 80%, hsla(0,0%,100%,.6), transparent 50%),
    radial-gradient(1px 1px at 40% 60%, hsla(0,0%,100%,.55), transparent 50%),
    radial-gradient(1.2px 1.2px at 85% 15%, hsla(43,96%,70%,.7), transparent 50%),
    radial-gradient(1px 1px at 10% 85%, hsla(0,0%,100%,.5), transparent 50%),
    radial-gradient(1.5px 1.5px at 55% 20%, hsla(24,95%,70%,.55), transparent 50%);
  background-size: 800px 800px;
  animation: drift 120s linear infinite;
  opacity: .7;
  pointer-events: none;
  z-index: 0;
}
@keyframes drift {
  from { background-position: 0 0; }
  to   { background-position: 800px 800px; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ——— Typography —————————————————————————————————————————— */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0;
}
h1 { font-size: clamp(2.6rem, 7vw, 5.6rem); line-height: 0.98; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); line-height: 1.1; }
h3 { font-size: 1.35rem; line-height: 1.25; }
p  { line-height: 1.65; color: var(--text-300); margin: 0; }

.highlight {
  /* Push from yellow to light-orange-to-orange per brand directive. */
  background: linear-gradient(120deg, var(--orange-300, #fdba74), var(--orange-500));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px var(--gold-glow));
}
.accent { color: var(--gold-500); }

/* ——— Layout ————————————————————————————————————————————— */
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.5rem); }
section    { position: relative; z-index: 1; padding: clamp(4rem, 10vw, 8rem) 0; }

/* ——— Glass primitive — the one true panel ——————————————— */
.glass-card {
  position: relative;
  background: var(--glass-wash);
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  box-shadow: var(--shadow-2), inset 0 1px 0 hsla(0,0%,100%,0.05);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  opacity: 0; transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-tao),
              transform var(--dur-slow) var(--ease-tao),
              border-color var(--dur-med) var(--ease-tao),
              box-shadow var(--dur-med) var(--ease-tao);
}
.glass-card.visible { opacity: 1; transform: translateY(0); }
.glass-card:hover {
  border-color: var(--glass-stroke-hi);
  box-shadow: var(--shadow-lift), inset 0 1px 0 hsla(43,96%,70%,.12);
}
/* Top hairline — "current" line */
.glass-card::before {
  content: ""; position: absolute; inset: 0 20% auto 20%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-500), transparent);
  opacity: .35; pointer-events: none;
}

/* ——— Navigation ————————————————————————————————————————— */
.glass-nav {
  position: sticky; top: 0; z-index: 10;
  background: hsla(222, 47%, 4%, 0.55);
  border-bottom: 1px solid var(--glass-stroke);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.nav-container {
  max-width: 1200px; margin: 0 auto;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}
.logo { display: flex; align-items: baseline; gap: .5ch; }
.logo-text {
  font-family: var(--font-display); font-weight: 900; letter-spacing: .24em;
  font-size: 1.05rem;
  /* K-Ohm directive: terminate in light-orange, not yellow. */
  background: linear-gradient(120deg, var(--text-100), var(--orange-400));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.logo-sub { font-family: var(--font-mono); font-size: .7rem; color: var(--text-500); letter-spacing: .3em; }
.nav-links { display: flex; align-items: center; gap: clamp(.5rem, 2vw, 2rem); }
.nav-links a {
  color: var(--text-300); text-decoration: none; font-size: .9rem; font-weight: 500;
  padding: .5rem .25rem; position: relative; transition: color var(--dur-fast) var(--ease-tao);
}
.nav-links a:not(.btn-portal)::after {
  content: ""; position: absolute; left: 50%; right: 50%; bottom: 0;
  height: 1px; background: var(--gold-500);
  transition: left var(--dur-med) var(--ease-tao), right var(--dur-med) var(--ease-tao);
}
.nav-links a:hover { color: var(--text-100); }
.nav-links a:not(.btn-portal):hover::after { left: 0; right: 0; }

.btn-portal {
  border: 1px solid var(--glass-stroke-hi);
  padding: .55rem 1.1rem !important;
  border-radius: 999px;
  background: var(--glass-wash-hi);
  transition: all var(--dur-med) var(--ease-tao);
}
.btn-portal:hover {
  border-color: var(--gold-500);
  color: var(--gold-400) !important;
  box-shadow: 0 0 0 4px var(--gold-glow);
}
@media (max-width: 720px) {
  .nav-links a:not(.btn-portal) { display: none; }
}

/* ——— Hero ————————————————————————————————————————————— */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; isolation: isolate;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: -1;
  background:
    url('hero.png') center/cover no-repeat,
    var(--ink-950);
  opacity: .42;
  filter: saturate(.7) contrast(1.05);
  mask-image: linear-gradient(180deg, black 0%, black 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, black 0%, black 55%, transparent 100%);
}
.hero-content {
  text-align: center; max-width: 900px;
  padding: 0 clamp(1rem, 4vw, 2rem);
}
.subtitle {
  margin-top: 1.2rem;
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  color: var(--text-300);
  max-width: 620px; margin-left: auto; margin-right: auto;
}
.cta-group { margin-top: 2.4rem; display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn {
  font-family: var(--font-sans); font-weight: 600; font-size: .95rem;
  letter-spacing: .02em;
  padding: .95rem 1.8rem; border-radius: 999px;
  text-decoration: none; cursor: pointer; display: inline-flex; align-items: center; gap: .6rem;
  border: 1px solid transparent;
  transition: transform var(--dur-med) var(--ease-tao),
              box-shadow var(--dur-med) var(--ease-tao),
              background var(--dur-med) var(--ease-tao),
              border-color var(--dur-med) var(--ease-tao);
  will-change: transform;
}
.btn-primary {
  background: linear-gradient(120deg, var(--gold-500), var(--orange-500));
  color: var(--ink-950);
  box-shadow: 0 8px 28px -8px var(--gold-glow), inset 0 1px 0 hsla(0,0%,100%,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px var(--gold-glow); }
.btn-secondary {
  background: var(--glass-wash-hi);
  color: var(--text-100);
  border-color: var(--glass-stroke-hi);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover { border-color: var(--gold-500); color: var(--gold-400); }

/* Fade-in for hero copy */
.fade-in         { animation: fadeUp var(--dur-slow) var(--ease-tao) both; }
.fade-in-delayed { animation: fadeUp var(--dur-slow) var(--ease-tao) .25s both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

/* Scroll indicator */
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  opacity: .6;
}
.mouse {
  width: 22px; height: 36px;
  border: 1.5px solid var(--text-300); border-radius: 12px;
  position: relative;
}
.mouse::after {
  content: ""; position: absolute; top: 7px; left: 50%;
  width: 2px; height: 6px; margin-left: -1px;
  background: var(--gold-500); border-radius: 2px;
  animation: wheel 1.6s var(--ease-tao) infinite;
}
@keyframes wheel {
  0%   { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ——— Philosophy ————————————————————————————————————————— */
.philosophy-card { text-align: center; max-width: 880px; margin: 0 auto; }
.philosophy-card p { margin-top: 1rem; font-size: 1.05rem; }

.stats {
  margin-top: 2.6rem;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}
.stat-item {
  display: flex; flex-direction: column; align-items: center;
  padding: 1.2rem .5rem;
  border-left: 1px solid var(--glass-stroke);
}
.stat-item:first-child { border-left: 0; }
.stat-num {
  font-family: var(--font-display); font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 900;
  color: var(--gold-500);
  text-shadow: 0 0 22px var(--gold-glow);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: .72rem; color: var(--text-500);
  letter-spacing: .22em; text-transform: uppercase; margin-top: .4rem;
}
@media (max-width: 600px) {
  .stats { grid-template-columns: 1fr; }
  .stat-item, .stat-item:first-child { border-left: 0; border-top: 1px solid var(--glass-stroke); }
  .stat-item:first-child { border-top: 0; }
}

/* ——— Ecosystem / Portals ————————————————————————————————— */
.section-title {
  text-align: center; margin-bottom: 3rem;
  position: relative;
}
.section-title::after {
  content: ""; display: block; margin: 1rem auto 0;
  width: 64px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-500), transparent);
}

.portal-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.portal-card {
  text-align: left;
  display: flex; flex-direction: column; gap: .8rem;
  transition-delay: calc(var(--i, 0) * 80ms);
}
.portal-card .icon {
  font-size: 1.8rem; width: 48px; height: 48px;
  display: grid; place-items: center;
  border: 1px solid var(--glass-stroke-hi);
  border-radius: var(--radius-md);
  background: var(--glass-wash-hi);
  filter: drop-shadow(0 0 8px var(--gold-glow));
}
.portal-card h3 { color: var(--text-100); }
.btn-link {
  margin-top: auto;
  color: var(--gold-400); text-decoration: none; font-weight: 600; font-size: .92rem;
  display: inline-flex; align-items: center; gap: .4rem;
  transition: gap var(--dur-med) var(--ease-tao), color var(--dur-fast) var(--ease-tao);
}
.btn-link:hover { gap: .9rem; color: var(--gold-500); }

/* ——— Footer ————————————————————————————————————————————— */
footer {
  padding: 2.4rem 0;
  border-top: 1px solid var(--glass-stroke);
  background: hsla(222, 47%, 4%, 0.6);
  backdrop-filter: blur(12px);
  position: relative; z-index: 1;
}
.footer-content {
  display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  flex-wrap: wrap;
}
.footer-left p { margin: .2rem 0; font-size: .85rem; }
.footer-left .version { color: var(--text-500); font-family: var(--font-mono); font-size: .72rem; }
.footer-right a {
  color: var(--gold-400); text-decoration: none; font-size: .9rem;
  transition: color var(--dur-fast) var(--ease-tao);
}
.footer-right a:hover { color: var(--gold-500); }

/* ——— Print / selection polish ———————————————————————————— */
::selection { background: var(--gold-500); color: var(--ink-950); }
:focus-visible { outline: 2px solid var(--gold-500); outline-offset: 3px; border-radius: 4px; }

/* ——— Guestbook / Security Gateway ———————————————————————— */
.guestbook {
  position: relative;
  overflow: hidden;
}
.guestbook::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-glow), transparent);
}
.guestbook-card {
  max-width: 820px; margin: 0 auto;
  text-align: center;
}
.guestbook-form {
  margin-top: 2rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  text-align: left;
}
.form-group {
  display: flex; flex-direction: column; gap: 0.5rem;
}
.form-group label {
  font-family: var(--font-mono); font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--text-500);
}
.form-control {
  background: hsla(222, 47%, 4%, 0.4);
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  color: var(--text-100);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: all var(--dur-med) var(--ease-tao);
}
.form-control:focus {
  outline: none;
  border-color: var(--gold-500);
  background: hsla(222, 47%, 4%, 0.6);
  box-shadow: 0 0 15px -5px var(--gold-glow);
}
.form-control::placeholder { color: var(--text-500); opacity: 0.5; }

.guestbook-status {
  padding: 1rem; border-radius: var(--radius-md);
  font-size: 0.9rem; margin-top: 1rem;
  display: none;
  animation: fadeIn var(--dur-med) var(--ease-tao);
}
.status-success {
  display: block;
  background: hsla(142, 70%, 45%, 0.1);
  border: 1px solid hsla(142, 70%, 45%, 0.3);
  color: hsl(142, 70%, 75%);
}
.status-error {
  display: block;
  background: hsla(0, 70%, 45%, 0.1);
  border: 1px solid hsla(0, 70%, 45%, 0.3);
  color: hsl(0, 70%, 75%);
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ============================================================
   K-Ohm Unified Brand-Pill Shell (matches Tao + Ohmeter nav)
   Palette directive: yellow pushed to at-least light-orange.
   ============================================================ */
:root {
  --kohm-orange-300: #fdba74;
  --kohm-orange-400: #fb923c;
  --kohm-orange-500: #f97316;
  --kohm-orange-600: #ea580c;
  --kohm-amber-400: #fbbf24;
}

.nav-left { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }

/* ——— Nav logo ——————————————————————————————————————————— */
.nav-logo-link { display: flex; align-items: center; text-decoration: none; }
.nav-logo {
  height: 44px;
  width: auto;
  display: block;
  transition: opacity 140ms ease, filter 140ms ease;
  filter: drop-shadow(0 0 10px rgba(249,115,22,0.25));
}
.nav-logo-link:hover .nav-logo {
  opacity: 0.85;
  filter: drop-shadow(0 0 16px rgba(249,115,22,0.50));
}

/* ——— Two-column form row ————————————————————————————————— */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .guestbook-card { max-width: 100%; }
}

/* ——— Required / optional labels ———————————————————————————— */
.form-group label .req { color: var(--gold-500); margin-left: 2px; }
.form-group label .optional { color: var(--text-500); font-size: 0.68rem; margin-left: 4px; }

/* ——— Select styling ————————————————————————————————————— */
select.form-control {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23f97316' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}
select.form-control option {
  background: #0d1117;
  color: var(--text-100);
}

.kohm-brand-pill {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.8rem; border-radius: 8px;
  font-family: var(--font-display, 'Montserrat', system-ui, sans-serif);
  font-weight: 800; font-size: 0.75rem; line-height: 1;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease, background 120ms ease;
  background: rgba(255,255,255,0.04);
}
.kohm-brand-pill:hover { transform: translateY(-1px); }
.kohm-brand-pill .omega {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.4rem; height: 1.4rem;
  font-weight: 800; font-size: 1.05rem; line-height: 1;
  border-radius: 6px; border: 1px solid rgba(255,255,255,0.08);
  background: #0b0b15;
}

.kohm-brand-pill--tao { border-color: rgba(251,146,60,0.40); color: var(--kohm-orange-300); }
.kohm-brand-pill--tao .omega { color: var(--kohm-orange-400); border-color: rgba(251,146,60,0.50); }
.kohm-brand-pill--tao:hover { border-color: var(--kohm-orange-400); color: #fff; box-shadow: 0 6px 24px -10px rgba(251,146,60,0.45); }

.kohm-brand-pill--ohmeter { border-color: rgba(249,115,22,0.50); color: var(--kohm-orange-400); }
.kohm-brand-pill--ohmeter .omega { color: var(--kohm-orange-500); border-color: rgba(249,115,22,0.55); }
.kohm-brand-pill--ohmeter:hover { border-color: var(--kohm-orange-500); color: #fff; box-shadow: 0 6px 24px -10px rgba(249,115,22,0.55); }

.kohm-brand-pill--kohm { border-color: rgba(251,191,36,0.45); }
.kohm-brand-pill--kohm .name {
  background: linear-gradient(100deg, var(--kohm-amber-400), var(--kohm-orange-400));
  -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent;
}
.kohm-brand-pill--kohm .omega { color: var(--kohm-amber-400); border-color: rgba(251,191,36,0.55); }
.kohm-brand-pill--kohm:hover { border-color: var(--kohm-orange-400); box-shadow: 0 6px 24px -10px rgba(251,191,36,0.45); }

.kohm-brand-pill--active { box-shadow: 0 0 0 1px rgba(251,146,60,0.25), 0 6px 22px -8px rgba(251,146,60,0.45); }