/* Mentara — marketing site
   Self-contained, no build step, no external assets or fonts.
   Single committed dark theme; restyle freely (design is intentionally minimal). */

:root {
  --bg:        #0a0a0f;
  --bg-alt:    #0e0e15;
  --surface:   #14141d;
  --surface-2: #191922;
  --border:    rgba(255, 255, 255, 0.09);
  --border-2:  rgba(255, 255, 255, 0.14);

  --text:      #ecebf2;
  --muted:     #a3a2b2;
  --faint:     #6f6e80;

  --accent:    #8b7cf6;   /* violet */
  --accent-2:  #6366f1;   /* indigo */
  --accent-3:  #ff8a6b;   /* warm coral micro-accent */
  --accent-soft: rgba(139, 124, 246, 0.14);

  --radius:    16px;
  --radius-sm: 10px;
  --wrap:      1120px;
  --ease:      cubic-bezier(0.22, 1, 0.36, 1);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
          Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.02em; margin: 0; font-weight: 650; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--accent); color: #0a0a0f; font-weight: 600;
  padding: 10px 16px; border-radius: 8px; transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Brand mark ---------- */
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; }
.brand-name { font-size: 1.15rem; }
.brand-mark {
  width: 20px; height: 20px; border-radius: 6px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 6px 18px rgba(99,102,241,0.35);
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 6px 5px;
  background: rgba(255,255,255,0.9); border-radius: 2px;
  clip-path: polygon(0 40%, 20% 40%, 20% 0, 40% 0, 40% 100%, 60% 100%, 60% 20%, 80% 20%, 80% 60%, 100% 60%, 100% 75%, 0 75%);
  opacity: 0.9;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a {
  color: var(--muted); font-size: 0.94rem; padding: 8px 12px; border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-menu a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-cta {
  color: var(--text) !important; background: var(--accent-soft);
  border: 1px solid var(--border-2); font-weight: 550;
}
.nav-cta:hover { background: rgba(139,124,246,0.22) !important; }

.nav-toggle { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 1rem; font-weight: 560; padding: 13px 24px; border-radius: 12px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.15s var(--ease), background 0.2s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  color: #0a0a0f;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px -8px rgba(99, 102, 241, 0.6);
  font-weight: 620;
}
.btn-primary:hover { box-shadow: 0 12px 30px -8px rgba(99, 102, 241, 0.8); transform: translateY(-1px); }
.btn-ghost { color: var(--text); background: rgba(255,255,255,0.03); border-color: var(--border-2); }
.btn-ghost:hover { background: rgba(255,255,255,0.07); border-color: var(--border-2); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: clamp(64px, 12vw, 128px) 0 clamp(48px, 8vw, 88px); overflow: hidden; }
.hero-glow {
  position: absolute; top: -30%; left: 50%; transform: translateX(-50%);
  width: min(1100px, 120%); height: 720px; pointer-events: none;
  background:
    radial-gradient(closest-side, rgba(139,124,246,0.28), transparent 70%),
    radial-gradient(closest-side, rgba(255,138,107,0.10), transparent 70%);
  background-position: 40% 30%, 70% 60%;
  background-repeat: no-repeat; filter: blur(10px); opacity: 0.9;
}
.hero-inner { position: relative; text-align: center; }

.eyebrow {
  display: inline-block; color: var(--muted); font-size: 0.82rem;
  letter-spacing: 0.08em; text-transform: uppercase; font-weight: 550;
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: rgba(255,255,255,0.02); margin-bottom: 26px;
}
.hero-title { font-size: clamp(2.6rem, 7vw, 5rem); font-weight: 700; letter-spacing: -0.035em; }
.grad {
  background: linear-gradient(120deg, var(--accent) 10%, var(--accent-3) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  max-width: 640px; margin: 24px auto 0; color: var(--muted);
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
}
.hero-sub strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }

/* Waveform motif */
.waveform {
  display: flex; align-items: center; justify-content: center; gap: 5px;
  height: 72px; margin-top: 56px;
}
.waveform span {
  width: 4px; border-radius: 999px; height: 14px;
  background: linear-gradient(var(--accent), var(--accent-2));
  opacity: 0.55; animation: wave 1.4s ease-in-out infinite;
}
.waveform span:nth-child(3n)   { animation-delay: -0.2s; }
.waveform span:nth-child(3n+1) { animation-delay: -0.5s; }
.waveform span:nth-child(4n)   { animation-delay: -0.8s; }
.waveform span:nth-child(5n)   { animation-delay: -1.1s; }
@keyframes wave {
  0%, 100% { height: 12px; opacity: 0.4; }
  50%      { height: 46px; opacity: 0.9; }
}
@media (prefers-reduced-motion: reduce) {
  .waveform span { animation: none; height: 26px; opacity: 0.5; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 10vw, 112px) 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: clamp(1.9rem, 4vw, 2.75rem); }
.kicker {
  color: var(--accent); font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px;
}
.lead { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.2rem); margin-top: 16px; }
.center-lead { max-width: 620px; margin-inline: auto; }

/* ---------- Anywhere / platforms ---------- */
.platforms {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; max-width: 780px; margin: 0 auto;
}
.platforms li {
  font-size: 1rem; font-weight: 550; color: var(--text);
  padding: 11px 20px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border-2);
  transition: transform 0.15s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.platforms li:hover { transform: translateY(-2px); border-color: var(--accent); background: var(--surface-2); }
.platforms-note { text-align: center; color: var(--faint); margin-top: 22px; font-size: 0.98rem; }

/* ---------- Feature cards ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--border-2); background: var(--surface-2); }
.card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 18px;
  color: var(--accent); background: var(--accent-soft); border: 1px solid var(--border-2);
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 0.96rem; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 28px 22px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 11px; font-weight: 680; font-size: 1.1rem;
  color: #0a0a0f; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  margin-bottom: 16px;
}
.step h3 { font-size: 1.12rem; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 0.96rem; }

/* ---------- Persona cards ---------- */
.persona-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.persona {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.persona:hover { transform: translateY(-4px); border-color: var(--border-2); }
.persona-top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.persona-avatar {
  width: 52px; height: 52px; border-radius: 14px; flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 680; font-size: 1.35rem; color: #0a0a0f;
}
.persona-avatar[data-p="nomi"]    { background: linear-gradient(135deg, #ff8a6b, #f6559b); }
.persona-avatar[data-p="natalia"] { background: linear-gradient(135deg, #6366f1, #22d3ee); }
.persona-avatar[data-p="hanna"]   { background: linear-gradient(135deg, #8b7cf6, #c084fc); }
.persona h3 { font-size: 1.2rem; }
.persona-tag { color: var(--accent); font-size: 0.86rem; font-weight: 550; margin-top: 2px; }
.persona > p { color: var(--muted); font-size: 0.97rem; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; text-align: center; background: var(--bg-alt); border-top: 1px solid var(--border); }
.cta-inner { max-width: 620px; margin-inline: auto; }
.cta-band h2 { font-size: clamp(2rem, 4.5vw, 3rem); }
.cta-band .lead { margin-bottom: 30px; }

.waitlist { display: flex; gap: 10px; max-width: 480px; margin: 0 auto; flex-wrap: wrap; }
.waitlist input {
  flex: 1 1 240px; min-width: 0; font-size: 1rem; color: var(--text);
  padding: 13px 18px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border-2);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.waitlist input::placeholder { color: var(--faint); }
.waitlist input:focus { outline: none; border-color: var(--accent); background: var(--surface-2); }
.waitlist .btn { flex: 0 0 auto; }
.form-note { min-height: 1.4em; margin-top: 16px; font-size: 0.95rem; color: var(--accent); }
.form-note.error { color: var(--accent-3); }
.sysreq { color: var(--faint); font-size: 0.9rem; margin-top: 24px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 40px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; }
.footer-copy { color: var(--faint); font-size: 0.9rem; }
.footer-nav { display: flex; gap: 20px; }
.footer-nav a { color: var(--muted); font-size: 0.92rem; transition: color 0.2s var(--ease); }
.footer-nav a:hover { color: var(--text); }

/* ---------- Reveal-on-scroll (progressive; no-JS shows everything) ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .cards, .steps { grid-template-columns: repeat(2, 1fr); }
  .persona-cards { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 42px; height: 42px; border-radius: 10px; cursor: pointer;
    background: rgba(255,255,255,0.04); border: 1px solid var(--border-2); color: var(--text);
  }
  .nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after {
    content: ""; display: block; width: 18px; height: 2px; border-radius: 2px;
    background: currentColor; position: relative; transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
  }
  .nav-toggle-bar::before { position: absolute; top: -6px; }
  .nav-toggle-bar::after  { position: absolute; top: 6px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::after  { transform: translateY(-6px) rotate(-45deg); }

  .nav-menu {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(10,10,15,0.97); backdrop-filter: blur(14px);
    padding: 14px 24px 24px; border-bottom: 1px solid var(--border);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
  }
  .nav-menu.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-menu a { padding: 13px 14px; font-size: 1.05rem; }
  .nav-cta { text-align: center; margin-top: 6px; }
}
@media (max-width: 560px) {
  .cards, .steps { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}