/* ============================================================
   Orthon Dynamics
   ------------------------------------------------------------
   Ιδέα: όργανο ακριβείας. Ορθή γωνία (όρθιος) + τόξο (κίνηση).
   Λεπτές γραμμές χάραξης, μετρημένος κάνναβος, ορείχαλκος πάνω
   σε γραφίτη. Τα προϊόντα φέρνουν το δικό τους χρώμα.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:root {
  --ink: #0B0F12;
  --ink-2: #121A1F;
  --ink-3: #1A242A;
  --paper: #F5F6F5;
  --surface: #FFFFFF;
  --line: rgba(11, 15, 18, .10);
  --line-strong: rgba(11, 15, 18, .18);
  --muted: #5A6870;

  --brass: #C39A54;
  --brass-lo: #9A7738;
  --brass-hi: #E4C489;
  --pine: #0C5D4E;
  --cyan: #3E8E9E;

  --hair: rgba(255, 255, 255, .10);
  --hair-2: rgba(255, 255, 255, .05);

  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --font-head: "Plus Jakarta Sans", "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gutter: clamp(20px, 4vw, 40px);
}

html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

h1, h2, h3, .display {
  font-family: var(--font-head);
  line-height: 1.06;
  letter-spacing: -.028em;
  font-weight: 800;
}

/* Το «χαραγμένο» μικροκείμενο — αριθμοί, ετικέτες, συντεταγμένες. */
.mark {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 500;
}

.skip { position: absolute; left: -9999px; top: 0; z-index: 100; background: var(--ink); color: #fff; padding: 12px 18px; }
.skip:focus { left: 0; }
:where(a, button):focus-visible { outline: 2px solid var(--brass); outline-offset: 4px; border-radius: 4px; }

/* ---------- Κίνηση: αποκάλυψη με το κύλισμα ----------
   Το κρύψιμο ισχύει ΜΟΝΟ κάτω από .js, την οποία βάζει ένα inline script στο
   <head>. Αν το JavaScript δεν τρέξει — σφάλμα, αποκλεισμός, παλιό πρόγραμμα
   περιήγησης — δεν μπαίνει η κλάση και το περιεχόμενο απλώς φαίνεται. Ένα
   εφέ εμφάνισης δεν επιτρέπεται ποτέ να αφήσει σελίδα κενή. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
  transition-delay: var(--d, 0s);
}
.js [data-reveal].in { opacity: 1; transform: none; }

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

/* ---------- Κεφαλίδα ---------- */
.head {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background-color .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom: 1px solid transparent;
}
.head.solid {
  background: rgba(11, 15, 18, .72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--hair);
}
.head-in { display: flex; align-items: center; gap: 22px; height: 74px; }

.brand { display: inline-flex; align-items: center; gap: 12px; color: #fff; }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand-name {
  font-family: var(--font-head); font-weight: 800; font-size: 1.04rem; letter-spacing: -.02em;
}
.brand-name i { font-style: normal; font-weight: 500; color: rgba(255,255,255,.55); }

.nav { margin-left: auto; display: flex; align-items: center; gap: 30px; }
.nav a { font-size: .9rem; font-weight: 500; color: rgba(255,255,255,.62); transition: color .2s; }
.nav a:hover { color: #fff; }
.nav .btn { color: #fff; }
@media (max-width: 780px) { .nav .hide-sm { display: none; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 13px 24px; border-radius: 2px;
  font-weight: 600; font-size: .92rem; letter-spacing: .01em; white-space: nowrap;
  transition: background-color .22s, color .22s, border-color .22s, transform .22s;
  position: relative;
}
.btn:hover { transform: translateY(-2px); }
.btn-brass { background: var(--brass); color: #14100A; }
.btn-brass:hover { background: var(--brass-hi); }
.btn-wire { border: 1px solid var(--hair); color: #fff; }
.btn-wire:hover { border-color: rgba(255,255,255,.42); background: rgba(255,255,255,.04); }
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { background: #000; }

/* ---------- Ήρωας ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  background: var(--ink);
  color: #fff;
  padding: 120px 0 90px;
  overflow: hidden;
  isolation: isolate;
}
/* Κάνναβος χάραξης — αργή μετατόπιση, σχεδόν αόρατη. */
.hero::before {
  content: ""; position: absolute; inset: -2px; z-index: -2;
  background-image:
    linear-gradient(to right, var(--hair-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hair-2) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: radial-gradient(120% 90% at 65% 40%, #000 20%, transparent 78%);
  animation: drift 44s linear infinite;
}
@keyframes drift { to { background-position: 74px 74px; } }
/* Φωτισμός */
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(58rem 34rem at 78% 14%, rgba(195,154,84,.20), transparent 64%),
    radial-gradient(48rem 32rem at 4% 96%, rgba(62,142,158,.16), transparent 62%);
}

.hero-grid {
  display: grid; gap: clamp(36px, 6vw, 72px);
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  align-items: center;
  width: 100%;
}
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }

.eyebrow { display: flex; align-items: center; gap: 14px; color: var(--brass); margin-bottom: 26px; }
.eyebrow::before { content: ""; width: 40px; height: 1px; background: currentColor; opacity: .6; }

.hero h1 { font-size: clamp(2.6rem, 6.6vw, 4.6rem); max-width: 14ch; }
.hero h1 .arc { color: var(--brass); position: relative; white-space: nowrap; }
.hero .lead {
  margin-top: 26px; max-width: 52ch;
  font-size: clamp(1.02rem, 1.4vw, 1.16rem);
  color: rgba(255,255,255,.68);
}
.hero .cta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 12px; }

/* Το όργανο: ο ίδιος ο λογότυπος, μεγεθυμένος και ζωντανός. */
.instrument { position: relative; display: grid; place-items: center; }
.instrument svg { width: min(100%, 420px); height: auto; overflow: visible; }
.ring { transform-origin: 110px 110px; animation: spin 38s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.tick { opacity: .5; }
.draw { stroke-dasharray: var(--len); stroke-dashoffset: var(--len); animation: draw 1.5s cubic-bezier(.7,0,.2,1) .25s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.pulse { animation: pulse 3.6s ease-in-out infinite; transform-origin: center; }
@keyframes pulse { 0%,100% { opacity: .25 } 50% { opacity: .8 } }

.scroll-cue {
  position: absolute; left: var(--gutter); bottom: 34px;
  display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.34);
}
.scroll-cue span { display: block; width: 1px; height: 46px; background: linear-gradient(var(--brass), transparent); }
@media (max-width: 940px) { .scroll-cue { display: none; } }

/* ---------- Τμήματα ---------- */
.section { padding: clamp(84px, 11vw, 148px) 0; position: relative; }
.section.dark { background: var(--ink); color: #fff; }
.section.dark .lead, .section.dark p { color: rgba(255,255,255,.66); }

.sec-head { display: grid; gap: 18px; margin-bottom: clamp(44px, 6vw, 76px); max-width: 66ch; }
.sec-head h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
.sec-head p { color: var(--muted); font-size: 1.06rem; max-width: 56ch; }

/* Λεπτή γραμμή με αριθμό τμήματος — το «χαραγμένο» στοιχείο. */
.rule { display: flex; align-items: center; gap: 16px; color: var(--brass); }
.rule::after { content: ""; height: 1px; flex: 1; background: currentColor; opacity: .28; }

/* ---------- Δουλειές ---------- */
.works { display: grid; gap: 20px; }
.work {
  position: relative;
  display: grid; gap: clamp(24px, 3.4vw, 48px);
  grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
  align-items: center;
  padding: clamp(30px, 4vw, 54px);
  border-radius: 3px;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
}
@media (max-width: 900px) { .work { grid-template-columns: 1fr; } }

.work::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  transition: transform .8s cubic-bezier(.22,.61,.36,1);
}
.work:hover::before { transform: scale(1.04); }
.work.kentora::before { background: linear-gradient(135deg, #0C5D4E, #073A31 62%, #0A4A3E); }
.work.beacon::before  { background: linear-gradient(135deg, #143843, #0C2029 60%, #17414E); }

.work-kicker { display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.5); margin-bottom: 14px; }
.work h3 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.work .quote { margin-top: 10px; font-size: 1.02rem; color: rgba(255,255,255,.55); font-style: italic; }
.work p { margin-top: 16px; color: rgba(255,255,255,.76); max-width: 48ch; }
.work .cta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 11px; }

.feats { display: grid; gap: 1px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.10); }
.feats li {
  background: rgba(0,0,0,.16);
  padding: 13px 18px; font-size: .92rem; color: rgba(255,255,255,.86);
  display: flex; align-items: center; gap: 12px;
}
.feats li::before { content: ""; width: 5px; height: 5px; flex: none; background: var(--brass); }

/* Ρομποτική — ήσυχη, μια γραμμή, όχι κάρτα. */
.next {
  margin-top: 22px;
  border: 1px dashed var(--line-strong);
  border-radius: 3px;
  padding: clamp(24px, 3vw, 36px);
  display: flex; flex-wrap: wrap; align-items: center; gap: 18px;
}
.next h3 { font-size: 1.24rem; }
.next p { color: var(--muted); font-size: .97rem; max-width: 46ch; }
.next .mark { color: var(--brass-lo); margin-left: auto; }

/* ---------- Αρχές ---------- */
.principles { display: grid; gap: 1px; background: var(--hair); border-block: 1px solid var(--hair); }
.principle {
  background: var(--ink);
  padding: clamp(28px, 3.6vw, 46px) 0;
  display: grid; gap: 6px 30px;
  grid-template-columns: 74px minmax(0, 1fr) minmax(0, 1.15fr);
  align-items: start;
  transition: background-color .35s;
}
.principle:hover { background: var(--ink-2); }
@media (max-width: 820px) { .principle { grid-template-columns: 54px 1fr; } .principle p { grid-column: 2; } }
.principle .no { font-family: var(--mono); color: var(--brass); font-size: .84rem; padding-top: 6px; }
.principle h3 { font-size: clamp(1.16rem, 2vw, 1.5rem); }
.principle p { color: rgba(255,255,255,.6); font-size: 1rem; }

/* ---------- Επικοινωνία ---------- */
.contact-grid { display: grid; gap: clamp(28px, 4vw, 56px); grid-template-columns: minmax(0,1fr) minmax(0,.9fr); align-items: end; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact h2 { font-size: clamp(2rem, 5vw, 3.4rem); max-width: 15ch; }

.mails { display: grid; gap: 12px; }
.mail {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 3px;
  transition: border-color .25s, transform .25s;
}
.mail:hover { border-color: var(--ink); transform: translateX(4px); }
.mail b { display: block; font-weight: 600; font-size: 1.02rem; }
.mail small { color: var(--muted); font-size: .86rem; }
.mail .arrow { margin-left: auto; color: var(--brass); transition: transform .25s; }
.mail:hover .arrow { transform: translateX(4px); }

/* ---------- Υποσέλιδο ---------- */
.foot { background: var(--ink); color: rgba(255,255,255,.5); padding: 56px 0 40px; border-top: 1px solid var(--hair); }
.foot-in { display: flex; flex-wrap: wrap; gap: 26px; align-items: center; }
.foot-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 26px; font-size: .9rem; }
.foot a:hover { color: #fff; }
.foot-legal { margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--hair-2); font-size: .82rem; display: flex; flex-wrap: wrap; gap: 12px 24px; }
