/* ═══════════════════════════════════════════════
   PlanAI — Shared Stylesheet
   Typography: Playfair Display + DM Sans (Direction 03)
   Last updated: 2025
═══════════════════════════════════════════════ */

/* ── Tokens ─────────────────────────────────── */
:root {
  --night:    #1A1A2E;
  --slate:    #4A4E69;
  --clay:     #C9ADA7;
  --linen:    #F2E9E4;
  --linen-2:  #EAE0D8;
  --green:    #22B573;
  --green-d:  #1a9058;
  --white:    #ffffff;
  --border:   rgba(74,78,105,0.12);

  /* Playfair Display: headlines, wordmark, numbers */
  --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  /* DM Sans: body, nav, UI — weight 200/300/400 */
  --sans:  'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max:   1100px;
  --pad:   clamp(1.25rem, 5vw, 2.5rem);
  --rad:   8px;
}

/* ── Reset ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  background: var(--linen);
  color: var(--night);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a    { color: inherit; text-decoration: none; }
img  { display: block; max-width: 100%; }
button { cursor: pointer; font-family: var(--sans); }

/* ── Lang banner ─────────────────────────────── */
#lang-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 300;
  background: var(--night);
  padding: .65rem var(--pad);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  transform: translateY(-110%);
  transition: transform .35s cubic-bezier(.4,0,.2,1);
  border-bottom: 1px solid rgba(201,173,167,.1);
}
.banner-text    { font-size: .8125rem; font-weight: 300; color: var(--clay); }
.banner-actions { display: flex; gap: .75rem; flex-shrink: 0; }
.banner-accept  {
  font-size: .8125rem; font-weight: 400;
  background: var(--green); color: #fff;
  border: none; border-radius: var(--rad);
  padding: .3rem .9rem;
}
.banner-dismiss {
  font-size: .8125rem; font-weight: 300;
  color: rgba(201,173,167,.6);
  background: none; border: none;
}

/* ── Nav ─────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 200;
  background: var(--night);
  border-bottom: 1px solid rgba(201,173,167,.08);
  transition: box-shadow .2s;
}
nav.scrolled { box-shadow: 0 2px 24px rgba(0,0,0,.28); }
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 1rem var(--pad);
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}

/* Wordmark — Playfair 600, ls -.01em per logo system */
.wordmark       { display: flex; align-items: baseline; line-height: 1; }
.wm-plan        { font-family: var(--serif); font-weight: 600; font-size: 1.375rem; letter-spacing: -.01em; color: var(--linen); }
.wm-ai          { font-family: var(--serif); font-weight: 600; font-size: 1.375rem; letter-spacing: -.01em; color: var(--green); }
.wordmark.dark .wm-plan { color: var(--night); }

.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-link  {
  font-size: .8125rem; font-weight: 300;
  color: rgba(201,173,167,.55);
  letter-spacing: .02em;
  transition: color .2s;
}
.nav-link:hover,
.nav-link.active { color: var(--linen); }

.lang-switcher {
  display: flex;
  border: 1px solid rgba(201,173,167,.18);
  border-radius: var(--rad);
  overflow: hidden;
}
.lang-opt {
  font-size: .6875rem; font-weight: 400;
  letter-spacing: .06em; text-transform: uppercase;
  padding: .28rem .65rem;
  color: rgba(201,173,167,.5);
  background: none; border: none;
  transition: background .15s, color .15s;
}
.lang-opt:hover  { color: var(--linen); }
.lang-opt.active { background: var(--green); color: #fff; }

.nav-cta {
  font-size: .8125rem; font-weight: 400;
  color: var(--night); background: var(--green);
  border-radius: var(--rad); padding: .48rem 1.1rem;
  letter-spacing: .01em;
  transition: background .2s, transform .15s;
  display: inline-block;
}
.nav-cta:hover { background: var(--green-d); transform: translateY(-1px); }

.mob-btn {
  display: none; background: none; border: none;
  color: rgba(201,173,167,.6); font-size: 1.25rem; padding: .2rem;
}
.mob-nav {
  display: none; flex-direction: column;
  background: var(--night);
  border-top: 1px solid rgba(201,173,167,.07);
}
.mob-nav.open { display: flex; }
.mob-link {
  padding: .9rem var(--pad); font-size: .9375rem; font-weight: 300;
  color: rgba(201,173,167,.6);
  border-bottom: 1px solid rgba(201,173,167,.06); display: block;
}
.mob-link:hover { color: var(--linen); }
.mob-lang { display: flex; gap: .5rem; padding: .9rem var(--pad); border-bottom: 1px solid rgba(201,173,167,.06); }
.mob-cta  {
  margin: .9rem var(--pad) 1.25rem;
  display: block; text-align: center;
  font-weight: 400; background: var(--green);
  color: #fff; border-radius: var(--rad); padding: .8rem;
}

/* ── Shared section tokens ───────────────────── */
.inner { max-width: var(--max); margin: 0 auto; }

.kicker {
  font-size: .6875rem; font-weight: 400;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--green);
  display: flex; align-items: center; gap: .75rem;
  margin-bottom: 1.1rem;
}
.kicker::before {
  content: '';
  display: block; width: 22px; height: 1px;
  background: var(--green); opacity: .55;
  flex-shrink: 0;
}

h1, h2 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(2.375rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.625rem); }
h3 { font-family: var(--serif); font-weight: 500; font-size: 1.0625rem; line-height: 1.25; letter-spacing: -.01em; }

/* Italic accent in headlines — growth green */
h1 em, h2 em { font-style: italic; color: var(--green); font-weight: 500; }
h2.on-dark    { color: var(--linen); }

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--sans); font-size: .875rem; font-weight: 400;
  border-radius: var(--rad); padding: .8rem 1.75rem;
  transition: background .2s, transform .15s;
  border: none;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-d); transform: translateY(-1px); }
.btn-outline {
  background: none; color: var(--linen);
  border: 1px solid rgba(201,173,167,.25);
}
.btn-outline:hover { border-color: rgba(201,173,167,.55); }

.link-arrow {
  font-size: .875rem; font-weight: 400;
  color: var(--green);
  border-bottom: 1px solid rgba(34,181,115,.28);
  padding-bottom: 1px;
  display: inline-block;
  transition: border-color .2s;
}
.link-arrow:hover { border-color: var(--green); }

/* ── Page hero (inner pages) ─────────────────── */
.page-hero {
  background: var(--night);
  padding: clamp(3.5rem,8vw,5.5rem) var(--pad) clamp(3rem,6vw,4.5rem);
}
.page-hero-inner { max-width: var(--max); margin: 0 auto; }
.page-hero h1   { color: var(--linen); max-width: 700px; }
.page-hero .sub {
  font-size: clamp(.9375rem,1.8vw,1.0625rem);
  font-weight: 200;
  color: rgba(201,173,167,.7);
  max-width: 540px; line-height: 1.8;
  margin-top: 1.25rem;
}

/* ── Footer ──────────────────────────────────── */
footer {
  background: var(--night);
  padding: 2.75rem var(--pad);
}
.footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.footer-brand {}
.footer-tagline {
  font-size: .6875rem; font-weight: 300;
  letter-spacing: .1em; text-transform: uppercase;
  color: rgba(201,173,167,.35);
  margin-top: .5rem;
}
.footer-links { display: flex; gap: 2rem; flex-wrap: wrap; align-items: center; }
.footer-link  {
  font-size: .8125rem; font-weight: 300;
  color: rgba(201,173,167,.4);
  transition: color .2s;
}
.footer-link:hover { color: var(--linen); }
.footer-legal {
  width: 100%;
  padding-top: 1.75rem; margin-top: 1.75rem;
  border-top: 1px solid rgba(201,173,167,.07);
  font-size: .75rem; font-weight: 200;
  color: rgba(201,173,167,.25);
}

/* ── Scroll reveal ───────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Responsive nav ──────────────────────────── */
@media (max-width: 820px) {
  .nav-links { display: none; }
  .mob-btn   { display: block; }
}