/* ==========================================================================
   TimetableCreator — design system
   Palette: ink indigo / paper / amber / teal
   Type: Space Grotesk (display) · Inter (body) · IBM Plex Mono (time/data)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --ink:        #1F2A44;
  --ink-soft:   #3B4766;
  --paper:      #F7F5F0;
  --paper-dim:  #EFECE4;
  --line:       #D8D4C8;
  --amber:      #E8A33D;
  --amber-dark: #C6832A;
  --teal:       #3F7D6B;
  --teal-dark:  #2E5F51;
  --white:      #FFFFFF;
  --red-flag:   #B5482E;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --radius: 10px;
  --shadow: 0 2px 14px rgba(31,42,68,0.08);
  --shadow-lg: 0 12px 40px rgba(31,42,68,0.14);
  --maxw: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: var(--teal-dark); text-decoration: none; }
a:hover{ text-decoration: underline; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight:700; line-height:1.15; margin: 0 0 .5em; color: var(--ink); }
p{ margin: 0 0 1em; }
.wrap{ max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono{ font-family: var(--font-mono); }

:focus-visible{ outline: 3px solid var(--amber); outline-offset: 2px; }

/* ---------- Grid-motif background (the site's signature texture) ---------- */
.grid-bg{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  background-position: -1px -1px;
}

/* ---------- Header / nav ---------- */
.site-header{
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky; top:0; z-index: 50;
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 72px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display); font-weight:700; font-size: 1.15rem; color: var(--ink);
}
.brand:hover{ text-decoration:none; }
.brand-mark{
  width: 30px; height:30px; border-radius:7px;
  background: var(--ink);
  display:grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap:2px; padding:5px;
}
.brand-mark span{ background: var(--amber); border-radius:1px; }
.brand-mark span:nth-child(2){ background: var(--teal); }
.brand-mark span:nth-child(3){ background: var(--teal); }
.brand-mark span:nth-child(4){ background: var(--amber); }

.main-nav{ display:flex; align-items:center; gap: 28px; }
.main-nav a{ color: var(--ink-soft); font-weight:500; font-size:.95rem; }
.main-nav a:hover{ color: var(--ink); text-decoration:none; }
.main-nav a.current{ color: var(--ink); border-bottom: 2px solid var(--amber); padding-bottom: 4px; }
.nav-cta{
  background: var(--ink); color: var(--white) !important; padding: 9px 18px; border-radius: 8px;
  font-weight:600 !important;
}
.nav-cta:hover{ background: var(--ink-soft); text-decoration:none; }
.nav-toggle{ display:none; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; justify-content:center;
  font-family: var(--font-body); font-weight:600; font-size: .95rem;
  padding: 12px 22px; border-radius: 8px; border: 1px solid transparent; cursor:pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover{ text-decoration:none; }
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--ink); color: var(--white); }
.btn-primary:hover{ background: var(--ink-soft); }
.btn-amber{ background: var(--amber); color: var(--ink); }
.btn-amber:hover{ background: var(--amber-dark); }
.btn-outline{ background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-outline:hover{ background: var(--ink); color: var(--white); }
.btn-sm{ padding: 8px 14px; font-size: .85rem; }
.btn-block{ width:100%; }

/* ---------- Hero ---------- */
.hero{ padding: 64px 0 40px; }
.hero .wrap{ display:grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items:center; }
.eyebrow{
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .12em;
  font-size: .78rem; color: var(--teal-dark); font-weight:600; margin-bottom: 14px; display:block;
}
.hero h1{ font-size: clamp(2.1rem, 4vw, 3.1rem); }
.hero .lede{ font-size: 1.1rem; color: var(--ink-soft); max-width: 46ch; }
.hero-cta-row{ display:flex; gap:14px; margin-top: 26px; flex-wrap:wrap; }
.hero-note{ margin-top: 14px; font-size: .85rem; color: var(--ink-soft); font-family: var(--font-mono); }

/* ---------- Sections & "periods" (signature structural device) ---------- */
.section{ padding: 56px 0; }
.section-alt{ background: var(--paper-dim); }
.section-head{ max-width: 640px; margin: 0 auto 40px; text-align:center; }
.section-head h2{ font-size: clamp(1.6rem, 3vw, 2.1rem); }
.section-head p{ color: var(--ink-soft); }

.period-tag{
  display:inline-flex; align-items:baseline; gap:8px;
  font-family: var(--font-mono); font-size: .8rem; letter-spacing:.08em;
  color: var(--teal-dark); font-weight:600; margin-bottom: 10px;
}
.period-tag .num{ color: var(--amber-dark); font-weight:700; }

.period-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.period-card{
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.period-card h3{ font-size: 1.15rem; margin-bottom: 8px; }
.period-card p{ color: var(--ink-soft); font-size:.95rem; margin-bottom:0; }

/* ---------- Feature list ---------- */
.feature-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap:24px; }
.feature{ padding: 22px 0; border-top: 1px solid var(--line); }
.feature h3{ font-size: 1.05rem; display:flex; align-items:center; gap:8px; }
.feature h3::before{
  content:"✓"; display:inline-flex; align-items:center; justify-content:center;
  width:20px; height:20px; border-radius:5px; background: var(--teal); color:#fff; font-size:.7rem;
}
.feature p{ color: var(--ink-soft); font-size: .93rem; margin:0; }

/* ---------- FAQ ---------- */
.faq{ max-width: 760px; margin: 0 auto; }
.faq-item{ border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item summary{ cursor:pointer; font-weight:600; font-family: var(--font-display); list-style:none; display:flex; justify-content:space-between; gap:16px; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:"+"; font-family: var(--font-mono); color: var(--amber-dark); font-size:1.2rem; }
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ color: var(--ink-soft); margin-top: 10px; }

/* ---------- Timetable tool ---------- */
.tool-shell{
  background: var(--white); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.tool-toolbar{
  display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--paper-dim);
}
.tool-toolbar .group{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
.tool-select, .tool-input{
  font-family: var(--font-body); font-size: .88rem; padding: 8px 10px; border-radius:7px;
  border: 1px solid var(--line); background: var(--white); color: var(--ink);
}
.tool-body{ padding: 18px; overflow-x:auto; }
#timetableGrid{ border-collapse: collapse; width:100%; min-width: 720px; }
#timetableGrid th, #timetableGrid td{
  border: 1px solid var(--line); text-align:center; vertical-align: top; position:relative;
}
#timetableGrid th{
  background: var(--ink); color: var(--white); font-family: var(--font-mono);
  font-size: .8rem; padding: 10px 6px; font-weight:600;
}
#timetableGrid td.time-cell{
  background: var(--paper-dim); font-family: var(--font-mono); font-size: .78rem;
  color: var(--ink-soft); padding: 6px; width: 74px; white-space:nowrap;
}
#timetableGrid td.slot{ height: 46px; cursor:pointer; padding:2px; }
#timetableGrid td.slot:hover{ background: #FBF3E3; }
.event-block{
  border-radius:6px; padding: 4px 6px; font-size:.76rem; text-align:left; color:#fff;
  height:100%; display:flex; flex-direction:column; justify-content:center; overflow:hidden;
  cursor:pointer; line-height:1.2;
}
.event-block .ev-title{ font-weight:600; }
.event-block .ev-time{ font-family: var(--font-mono); font-size:.68rem; opacity:.9; }

/* modal */
.modal-backdrop{
  position: fixed; inset:0; background: rgba(31,42,68,.5); display:none;
  align-items:center; justify-content:center; z-index: 200; padding: 20px;
}
.modal-backdrop.open{ display:flex; }
.modal{
  background: var(--white); border-radius: 12px; padding: 26px; width: 100%; max-width: 420px;
  box-shadow: var(--shadow-lg);
}
.modal h3{ margin-bottom: 16px; }
.field{ margin-bottom: 14px; }
.field label{ display:block; font-size:.82rem; font-weight:600; margin-bottom:5px; color: var(--ink-soft); }
.field input, .field select{
  width:100%; padding: 9px 10px; border-radius:7px; border:1px solid var(--line); font-family: var(--font-body); font-size:.92rem;
}
.swatch-row{ display:flex; gap:8px; }
.swatch{ width:26px; height:26px; border-radius:50%; cursor:pointer; border:2px solid transparent; }
.swatch.selected{ border-color: var(--ink); }
.modal-actions{ display:flex; justify-content: space-between; gap: 10px; margin-top: 18px; }

/* ---------- Blog ---------- */
.post-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.post-card{
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); display:flex; flex-direction:column;
}
.post-card .post-cat{ font-family: var(--font-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color: var(--amber-dark); font-weight:600; margin-bottom:8px; }
.post-card h3{ font-size: 1.08rem; margin-bottom:8px; }
.post-card h3 a{ color: var(--ink); }
.post-card p{ color: var(--ink-soft); font-size:.9rem; flex:1; }
.post-card .post-meta{ font-family: var(--font-mono); font-size:.74rem; color: var(--ink-soft); margin-top:10px; }

.post-header{ max-width: 720px; margin: 0 auto 32px; text-align:center; }
.post-header .post-cat{ font-family: var(--font-mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.08em; color: var(--amber-dark); font-weight:600; }
.post-header h1{ margin-top:10px; }
.post-header .post-meta{ font-family: var(--font-mono); font-size:.82rem; color: var(--ink-soft); margin-top: 10px; }
.post-content{ max-width: 700px; margin: 0 auto; }
.post-content h2{ margin-top: 1.6em; font-size:1.35rem; }
.post-content h3{ margin-top: 1.3em; font-size:1.1rem; }
.post-content ul, .post-content ol{ padding-left: 1.3em; margin-bottom: 1.1em; }
.post-content li{ margin-bottom: .4em; }
.post-content blockquote{
  border-left: 3px solid var(--amber); margin: 1.6em 0; padding: 4px 0 4px 18px; color: var(--ink-soft); font-style: italic;
}
.post-cta{
  background: var(--paper-dim); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; text-align:center; margin: 2.4em 0;
}
.post-cta h3{ margin-bottom: 8px; }
.related-posts{ margin-top: 3em; padding-top: 2em; border-top:1px solid var(--line); }

/* ---------- Legal pages ---------- */
.legal-content{ max-width: 760px; margin: 0 auto; }
.legal-content h2{ margin-top: 1.8em; font-size: 1.25rem; }
.legal-content ul{ padding-left: 1.3em; }
.legal-updated{ font-family: var(--font-mono); font-size: .82rem; color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items:start; }
.contact-card{
  background: var(--white); border:1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
}
.form-status{ font-size:.9rem; margin-top: 10px; font-family: var(--font-mono); }

/* ---------- Cookie / consent banner ---------- */
.consent-bar{
  position: fixed; left:16px; right:16px; bottom:16px; z-index:300;
  background: var(--ink); color: var(--white); border-radius: 12px;
  padding: 16px 20px; display:flex; gap:16px; align-items:center; justify-content:space-between;
  box-shadow: var(--shadow-lg); flex-wrap:wrap; max-width: 900px; margin:0 auto;
}
.consent-bar p{ margin:0; font-size:.85rem; color:#E8E6DF; }
.consent-bar a{ color: var(--amber); }
.consent-bar.hidden{ display:none; }

/* ---------- Footer ---------- */
.site-footer{ border-top: 1px solid var(--line); background: var(--ink); color: #C9CEDD; margin-top: 60px; }
.site-footer .wrap{ padding: 48px 24px 28px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h4{ color:#fff; font-size:.85rem; text-transform:uppercase; letter-spacing:.08em; font-family: var(--font-mono); margin-bottom:14px; }
.site-footer a{ color:#C9CEDD; display:block; padding: 4px 0; font-size:.9rem; }
.site-footer a:hover{ color:#fff; text-decoration:none; }
.footer-brand p{ color:#9BA3BE; font-size:.88rem; max-width: 32ch; }
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.12); margin-top: 32px; padding-top: 20px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-size:.8rem; color:#8B93AE;
}

/* ---------- Responsive ---------- */
@media (max-width: 880px){
  .hero .wrap{ grid-template-columns: 1fr; }
  .period-grid, .feature-grid, .post-grid{ grid-template-columns: 1fr 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px){
  .main-nav{ display:none; }
  .period-grid, .feature-grid, .post-grid{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .hero{ padding: 40px 0 20px; }
}

@media print{
  .site-header, .site-footer, .tool-toolbar, .consent-bar, .section-alt, .hero, .section:not(.print-only){ display:none !important; }
}