/* ============================================================
   Telphora — dark enterprise theme (multi-page)
   ============================================================ */
:root {
  --bg: #07070d;
  --bg-soft: #0c0c16;
  --bg-card: #101018;
  --text: #f5f5f7;
  --muted: #a1a1b3;
  --faint: #6d6d80;
  --border: rgba(255, 255, 255, 0.09);
  --blue: #38bdf8;
  --violet: #a78bfa;
  --pink: #f472b6;
  --green: #34d399;
  --grad: linear-gradient(100deg, #38bdf8 0%, #a78bfa 52%, #f472b6 100%);
  --radius: 20px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(167, 139, 250, 0.35); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--violet); color: #fff;
  padding: 10px 16px; border-radius: 8px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

.container { width: min(1160px, 92%); margin: 0 auto; }
.container.narrow { width: min(780px, 92%); }

/* ---------- Typography ---------- */
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.08; font-weight: 800; }
h1 { font-size: clamp(2.6rem, 6.5vw, 4.8rem); font-weight: 900; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 0.4em; }
h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -0.01em; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.kicker {
  display: inline-block;
  font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 0.9rem;
}

.section-sub {
  color: var(--muted); font-size: 1.12rem;
  max-width: 620px; margin-bottom: 3rem;
}

.lede { color: var(--muted); font-size: 1.18rem; max-width: 560px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1rem; text-decoration: none;
  padding: 0.9rem 1.9rem; border-radius: 999px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  cursor: pointer; border: none; white-space: nowrap;
}
.btn-primary {
  background: var(--grad); color: #0a0a12;
  box-shadow: 0 8px 32px rgba(167, 139, 250, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(167, 139, 250, 0.5); }
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: rgba(167, 139, 250, 0.6); transform: translateY(-2px); }
.btn-sm { padding: 0.62rem 1.4rem; font-size: 0.92rem; }
.btn-lg { padding: 1.05rem 2.6rem; font-size: 1.1rem; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(7, 7, 13, 0.72);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  width: min(1160px, 92%); margin: 0 auto; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.wordmark {
  font-size: 2rem; font-weight: 900; letter-spacing: -0.04em;
  color: var(--text); text-decoration: none; line-height: 1;
}
.wordmark-sm { font-size: 1.4rem; }
.nav-links { display: flex; gap: 1.8rem; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-weight: 500; font-size: 0.98rem;
  transition: color 0.18s ease; position: relative; padding: 0.3rem 0;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); font-weight: 700; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--grad); border-radius: 2px;
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: 0.25s; }
.nav-mobile {
  display: none; flex-direction: column; gap: 0.4rem;
  padding: 1rem 4% 1.4rem;
  background: rgba(7, 7, 13, 0.97);
  border-bottom: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a:not(.btn) { color: var(--muted); text-decoration: none; font-weight: 600; padding: 0.6rem 0; }
.nav-mobile a:not(.btn).active { color: var(--text); }
.nav-mobile .btn { margin-top: 0.6rem; }

/* ---------- Heroes ---------- */
.hero { position: relative; padding: calc(var(--nav-h) + 5rem) 0 5.5rem; overflow: hidden; }
.page-hero { position: relative; padding: calc(var(--nav-h) + 4rem) 0 3.5rem; overflow: hidden; }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-bottom: 1.1rem; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.orb-1 { width: 520px; height: 520px; top: -160px; right: -120px; background: radial-gradient(circle, rgba(167,139,250,0.35), transparent 65%); }
.orb-2 { width: 420px; height: 420px; bottom: -140px; left: -120px; background: radial-gradient(circle, rgba(56,189,248,0.28), transparent 65%); }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, black 30%, transparent 75%);
}
.hero-inner {
  position: relative; display: grid; gap: 3.5rem;
  grid-template-columns: 1.05fr 0.95fr; align-items: center;
}
.pill {
  display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 0.5rem 1.1rem; border-radius: 999px; margin-bottom: 1.6rem;
  border: 1px solid rgba(167, 139, 250, 0.4); color: var(--violet);
  background: rgba(167, 139, 250, 0.08);
}
.hero-copy h1 { margin-bottom: 1.4rem; }
.hero-copy .lede { margin-bottom: 2.4rem; }
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Radar visual */
.radar-card {
  position: relative; width: min(420px, 100%); margin: 0 auto;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 28px; padding: 2rem;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5), 0 0 60px rgba(167, 139, 250, 0.08);
}
.radar-card::before {
  content: ""; position: absolute; top: 0; left: 10%; right: 10%; height: 2px;
  background: var(--grad); border-radius: 2px; opacity: 0.8;
}
.radar { width: 100%; height: auto; display: block; }
.ping { transform-origin: 160px 160px; animation: ping 3s ease-out infinite; opacity: 0; }
.ping-2 { animation-delay: 1.5s; }
@keyframes ping {
  0% { transform: scale(0.35); opacity: 0.9; }
  100% { transform: scale(1.6); opacity: 0; }
}
.node { animation: blink 2.6s ease-in-out infinite; }
.node:nth-of-type(2) { animation-delay: 0.9s; }
.node:nth-of-type(3) { animation-delay: 1.7s; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.agent-chip {
  position: absolute; font-size: 0.74rem; font-weight: 600; letter-spacing: 0.02em;
  background: rgba(12, 12, 22, 0.92); border: 1px solid var(--border);
  padding: 0.42rem 0.85rem; border-radius: 999px; color: var(--muted);
  display: flex; align-items: center; gap: 0.5rem;
  animation: float 5s ease-in-out infinite;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}
.agent-chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.chip-1 { top: 8%; right: -4%; }
.chip-2 { top: 44%; left: -9%; animation-delay: 1.6s; }
.chip-3 { bottom: 9%; right: 2%; animation-delay: 3.1s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ---------- Coverage strip ---------- */
.strip { padding: 2.5rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-soft); }
.strip-line { text-align: center; color: var(--muted); font-size: 1.05rem; margin-bottom: 1.6rem; }
.strip-items { display: flex; justify-content: center; gap: 3.5rem; flex-wrap: wrap; }
.strip-item { display: flex; align-items: center; gap: 0.7rem; font-weight: 700; font-size: 1.08rem; }
.strip-item svg { width: 26px; height: 26px; color: var(--violet); }

/* ---------- Sections ---------- */
.section { padding: 6.5rem 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-tight { padding: 4rem 0; }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  position: relative; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 2rem 1.8rem; overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--grad); opacity: 0; transition: opacity 0.22s ease;
}
.card:hover { transform: translateY(-5px); border-color: rgba(167, 139, 250, 0.35); box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45); }
.card:hover::before { opacity: 1; }
.card .icon {
  width: 48px; height: 48px; border-radius: 14px; margin-bottom: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  background: rgba(167, 139, 250, 0.1); border: 1px solid rgba(167, 139, 250, 0.25);
}
.card .icon svg { width: 24px; height: 24px; color: var(--violet); }
.card h3 { margin-bottom: 0.6rem; }
.card p { color: var(--muted); font-size: 0.99rem; }
.card .card-link { display: inline-block; margin-top: 1rem; color: var(--violet); font-weight: 700; font-size: 0.94rem; text-decoration: none; }
.card .card-link:hover { text-decoration: underline; }
.card.flagship { border-color: rgba(167, 139, 250, 0.45); background: linear-gradient(180deg, rgba(167,139,250,0.07), var(--bg-card) 55%); }
.card.flagship::before { opacity: 1; }
.flag {
  position: absolute; top: 1.1rem; right: 1.1rem;
  font-size: 0.68rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase;
  background: var(--grad); color: #0a0a12; padding: 0.32rem 0.75rem; border-radius: 999px;
}

/* ---------- Tabs ---------- */
.tabs { margin-top: 1rem; }
.tab-list {
  display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--border); padding-bottom: 1.2rem;
}
.tab-btn {
  font-family: var(--font); font-weight: 700; font-size: 0.95rem; color: var(--muted);
  background: transparent; border: 1px solid var(--border); border-radius: 999px;
  padding: 0.65rem 1.35rem; cursor: pointer;
  transition: all 0.2s ease;
}
.tab-btn:hover { color: var(--text); border-color: rgba(167, 139, 250, 0.5); }
.tab-btn.active {
  color: #0a0a12; background: var(--grad); border-color: transparent;
  box-shadow: 0 6px 24px rgba(167, 139, 250, 0.35);
}
.tab-panel {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2.4rem; position: relative; overflow: hidden;
}
.tab-panel::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad);
}
.tab-panel[hidden] { display: none; }
.tab-panel h3 { font-size: 1.5rem; margin-bottom: 0.7rem; }
.tab-panel > p { color: var(--muted); max-width: 640px; margin-bottom: 1.4rem; }
.tab-points { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
.tab-points li {
  color: var(--muted); font-size: 0.98rem; padding-left: 1.7rem; position: relative;
}
.tab-points li::before {
  content: ""; position: absolute; left: 0; top: 0.42em;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--grad);
}

/* ---------- Steps ---------- */
.steps { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
.step {
  display: flex; gap: 1.4rem; align-items: flex-start;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.9rem;
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
  cursor: pointer;
}
.step:hover { border-color: rgba(56, 189, 248, 0.35); transform: translateY(-4px); }
.step.active { border-color: rgba(167, 139, 250, 0.55); box-shadow: 0 14px 44px rgba(0, 0, 0, 0.4); }
.step:focus-visible { outline: 2px solid var(--violet); outline-offset: 3px; }
.step-num {
  font-size: 0.85rem; font-weight: 800; letter-spacing: 0.1em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  border: 1px solid var(--border); border-radius: 12px; padding: 0.55rem 0.8rem;
  flex-shrink: 0;
}
.step h3 { margin-bottom: 0.4rem; }
.step p { color: var(--muted); font-size: 0.99rem; }

/* ---------- Principles ---------- */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.principle {
  border-left: 3px solid transparent; border-image: var(--grad) 1;
  padding: 0.4rem 0 0.4rem 1.6rem;
}
.principle h3 { font-size: 1.35rem; margin-bottom: 0.5rem; }
.principle p { color: var(--muted); }

/* ---------- About ---------- */
.about-body p { color: var(--muted); font-size: 1.1rem; margin-bottom: 1.3rem; }
.about-body .etymology { color: var(--text); font-size: 1.25rem; }
.about-body .etymology strong { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.founded { color: var(--faint); font-size: 0.98rem; }

/* ---------- Accordion (FAQ) ---------- */
.accordion { display: flex; flex-direction: column; gap: 0.9rem; }
.acc-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  transition: border-color 0.2s ease;
}
.acc-item.open { border-color: rgba(167, 139, 250, 0.45); }
.acc-btn {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  background: none; border: none; cursor: pointer; text-align: left;
  font-family: var(--font); font-size: 1.05rem; font-weight: 700; color: var(--text);
  padding: 1.3rem 1.5rem;
}
.acc-btn .acc-icon {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  transition: transform 0.25s ease, background 0.25s ease;
}
.acc-btn .acc-icon svg { width: 14px; height: 14px; color: var(--violet); }
.acc-item.open .acc-icon { transform: rotate(45deg); background: rgba(167, 139, 250, 0.12); }
.acc-panel { padding: 0 1.5rem 1.5rem; color: var(--muted); font-size: 1rem; }
.acc-panel[hidden] { display: none; }
.acc-panel a { color: var(--violet); }

/* ---------- Contact ---------- */
.mail-hero {
  text-align: center; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 28px; padding: 3.5rem 2rem; position: relative; overflow: hidden;
  margin-bottom: 3rem;
}
.mail-hero::before {
  content: ""; position: absolute; top: 0; left: 15%; right: 15%; height: 3px;
  background: var(--grad); border-radius: 3px;
}
.mail-hero .mail-addr {
  display: inline-block; font-size: clamp(1.3rem, 3.5vw, 2rem); font-weight: 800;
  letter-spacing: -0.02em; color: var(--text); text-decoration: none;
  padding: 1rem 2rem; border: 1px dashed rgba(167, 139, 250, 0.5); border-radius: 18px;
  margin: 1.6rem 0; transition: all 0.2s ease; word-break: break-all;
}
.mail-hero .mail-addr:hover { border-style: solid; background: rgba(167, 139, 250, 0.07); transform: translateY(-2px); }
.mail-sub { color: var(--muted); max-width: 520px; margin: 0 auto; }
.subject-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.subject-card {
  display: block; text-decoration: none; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 1.8rem 1.6rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.subject-card:hover { transform: translateY(-4px); border-color: rgba(167, 139, 250, 0.5); }
.subject-card h3 { margin-bottom: 0.5rem; }
.subject-card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1rem; }
.subject-card .go { color: var(--violet); font-weight: 700; font-size: 0.92rem; }

/* ---------- Final CTA ---------- */
.cta { padding: 7rem 0; text-align: center; position: relative; overflow: hidden; }
.cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 60% 55% at 50% 50%, rgba(167,139,250,0.14), transparent 70%);
}
.cta h2 { margin-bottom: 0.7rem; }
.cta p { color: var(--muted); margin-bottom: 2.2rem; font-size: 1.1rem; }
.cta .container { position: relative; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 2.6rem 0; background: var(--bg-soft); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.footer-brand p { color: var(--faint); font-size: 0.9rem; margin-top: 0.3rem; }
.footer-links { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.footer-links a, .footer-mail { color: var(--muted); text-decoration: none; font-size: 0.94rem; font-weight: 500; transition: color 0.18s ease; }
.footer-links a:hover, .footer-mail:hover { color: var(--text); }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .radar-card { width: min(340px, 92%); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; gap: 2rem; }
  .subject-cards { grid-template-columns: 1fr; }
  .tab-points { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links, .nav .btn-sm { display: none; }
  .nav-toggle { display: block; }
  .wordmark { font-size: 1.7rem; }
  .cards, .cards-2 { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 3rem); }
  .chip-1 { right: 0; }
  .chip-2 { left: -2%; }
  .strip-items { gap: 1.6rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .tab-panel { padding: 1.6rem 1.3rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .ping, .node, .agent-chip, .orb { animation: none; }
  .btn, .card, .step, .subject-card, .tab-btn { transition: none; }
}