/* =========================================================
   AI Prompt Generator — Design System
   Direction: technical draft / blueprint spec-sheet aesthetic
   ========================================================= */

:root{
  --ink-navy:      #0E2436;
  --ink-navy-2:    #0B1D2C;
  --panel:         #15304A;
  --panel-line:    #24476580;
  --paper:         #F4EFE3;
  --paper-dim:     #C9CFD6;
  --chalk-cyan:    #8FD6E8;
  --chalk-cyan-dim:#8FD6E840;
  --signal-amber:  #E8A23D;
  --signal-amber-dim: #E8A23D26;
  --slate:         #7C93A6;
  --danger:        #E2685B;
  --ok:            #7FBF8F;

  --font-display: 'Space Mono', 'Courier New', monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius: 3px;
  --max-width: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--ink-navy);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* subtle blueprint grid texture across the whole page */
body::before{
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--panel-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--panel-line) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.35;
}

.wrap{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

a{ color: var(--chalk-cyan); text-decoration: none; }
a:hover{ text-decoration: underline; }

::selection{ background: var(--signal-amber); color: var(--ink-navy-2); }

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

/* ---------- Eyebrow / annotation labels ---------- */
.eyebrow{
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--chalk-cyan);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before{
  content: "";
  width: 8px; height: 8px;
  border: 1px solid var(--chalk-cyan);
  transform: rotate(45deg);
  display: inline-block;
}

/* ---------- Header / Nav ---------- */
header.site{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14,36,54,0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--panel-line);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.logo{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo .mark{
  width: 22px; height: 22px;
  border: 2px solid var(--signal-amber);
  position: relative;
  flex-shrink: 0;
}
.logo .mark::before, .logo .mark::after{
  content: "";
  position: absolute;
  background: var(--signal-amber);
}
.logo .mark::before{ left: 50%; top: 3px; bottom: 3px; width: 2px; transform: translateX(-50%); }
.logo .mark::after{ top: 50%; left: 3px; right: 3px; height: 2px; transform: translateY(-50%); }
.logo span.dim{ color: var(--slate); font-weight: 400; }

.navlinks{
  display: flex;
  gap: 28px;
  font-size: 14px;
}
.navlinks a{ color: var(--paper-dim); }
.navlinks a:hover{ color: var(--chalk-cyan); }

.nav-toggle{ display: none; background: none; border: 1px solid var(--panel-line); color: var(--paper); width: 40px; height: 36px; border-radius: var(--radius); cursor: pointer; }

@media (max-width: 720px){
  .navlinks{
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--ink-navy-2);
    flex-direction: column;
    padding: 16px 24px;
    gap: 14px;
    border-bottom: 1px solid var(--panel-line);
    display: none;
  }
  .navlinks.open{ display: flex; }
  .nav-toggle{ display: block; }
}

/* ---------- Hero ---------- */
.hero{
  padding: 72px 0 40px;
  text-align: center;
}
.hero h1{
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.15;
  margin: 18px 0 16px;
  font-weight: 700;
  color: var(--paper);
}
.hero h1 em{
  font-style: normal;
  color: var(--signal-amber);
}
.hero p.sub{
  max-width: 620px;
  margin: 0 auto;
  color: var(--paper-dim);
  font-size: 17px;
}

/* ---------- Tool panel (the hero demo) ---------- */
.tool-panel{
  margin: 44px auto 0;
  max-width: 820px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: var(--radius);
  padding: 28px;
  text-align: left;
  position: relative;
}
.tool-panel::before{
  content: "SPEC-01 // INPUT";
  position: absolute;
  top: -11px; left: 20px;
  background: var(--ink-navy);
  padding: 0 8px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--chalk-cyan);
}

.tabs{
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--panel-line);
}
.tab-btn{
  font-family: var(--font-display);
  background: none;
  border: none;
  color: var(--slate);
  padding: 8px 16px 12px;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.04em;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab-btn.active{
  color: var(--paper);
  border-bottom-color: var(--signal-amber);
}

.field-label{
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: 8px;
  font-family: var(--font-display);
}

textarea, select, input[type=text]{
  width: 100%;
  background: var(--ink-navy-2);
  border: 1px solid var(--panel-line);
  color: var(--paper);
  padding: 13px 14px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  resize: vertical;
}
textarea:focus, select:focus, input[type=text]:focus{
  border-color: var(--chalk-cyan);
}
textarea{ min-height: 90px; }

.row{ display: flex; gap: 16px; margin-top: 18px; flex-wrap: wrap; }
.row > div{ flex: 1; min-width: 180px; }

.chip-group{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.chip{
  font-size: 13px;
  border: 1px solid var(--panel-line);
  background: var(--ink-navy-2);
  color: var(--paper-dim);
  padding: 7px 13px;
  border-radius: 20px;
  cursor: pointer;
  user-select: none;
  transition: all .15s ease;
}
.chip input{ display: none; }
.chip.checked{
  border-color: var(--signal-amber);
  color: var(--signal-amber);
  background: var(--signal-amber-dim);
}

.btn-generate{
  margin-top: 22px;
  width: 100%;
  background: var(--signal-amber);
  color: var(--ink-navy-2);
  border: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 15px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn-generate:hover{ transform: translateY(-1px); box-shadow: 0 4px 14px rgba(232,162,61,0.25); }
.btn-generate:disabled{ opacity: 0.55; cursor: progress; transform:none; box-shadow:none; }

.hint-row{
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 12px;
  color: var(--slate);
}

.improve-buttons{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- Output / spec-sheet cards ---------- */
.output-area{
  margin-top: 36px;
  display: grid;
  gap: 20px;
}
.output-area.grid2{
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.spec-card{
  position: relative;
  background: var(--ink-navy-2);
  border: 1px dashed var(--chalk-cyan-dim);
  border-radius: var(--radius);
  padding: 22px 20px 20px;
}
.spec-card .reg{
  position: absolute;
  width: 10px; height: 10px;
}
.spec-card .reg::before, .spec-card .reg::after{
  content:""; position:absolute; background: var(--chalk-cyan-dim);
}
.spec-card .reg::before{ left:50%; top:0; bottom:0; width:1px; transform:translateX(-50%);}
.spec-card .reg::after{ top:50%; left:0; right:0; height:1px; transform:translateY(-50%);}
.spec-card .reg.tl{ top:-5px; left:-5px; }
.spec-card .reg.tr{ top:-5px; right:-5px; }
.spec-card .reg.bl{ bottom:-5px; left:-5px; }
.spec-card .reg.br{ bottom:-5px; right:-5px; }

.spec-card .label{
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal-amber);
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.spec-card .body-text{
  font-size: 14.5px;
  color: var(--paper-dim);
  white-space: pre-wrap;
  word-break: break-word;
}
.spec-card .actions{
  margin-top: 14px;
  display: flex;
  gap: 8px;
}
.copy-btn{
  background: none;
  border: 1px solid var(--panel-line);
  color: var(--chalk-cyan);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-display);
}
.copy-btn:hover{ border-color: var(--chalk-cyan); }
.copy-btn.copied{ color: var(--ok); border-color: var(--ok); }

.status-msg{
  text-align: center;
  padding: 16px;
  font-size: 14px;
  color: var(--slate);
  font-family: var(--font-display);
}
.status-msg.error{ color: var(--danger); }

/* ---------- Generic sections ---------- */
section{ padding: 64px 0; position: relative; z-index: 1; }
h2.section-title{
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  margin: 10px 0 8px;
}
.section-sub{ color: var(--paper-dim); max-width: 560px; }

.steps{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
  margin-top: 36px;
}
.step{
  border-left: 2px solid var(--panel-line);
  padding-left: 18px;
}
.step .num{
  font-family: var(--font-display);
  color: var(--signal-amber);
  font-size: 13px;
}
.step h3{ font-size: 17px; margin: 8px 0 6px; }
.step p{ color: var(--paper-dim); font-size: 14.5px; margin: 0; }

.model-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-top: 32px;
}
.model-tile{
  border: 1px solid var(--panel-line);
  border-radius: var(--radius);
  padding: 16px 14px;
  text-align: center;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--paper-dim);
  background: var(--panel);
}

/* ---------- Legal / content pages ---------- */
.content-page{
  padding: 56px 0 90px;
}
.content-page h1{
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 38px);
  margin-bottom: 6px;
}
.content-page .updated{
  color: var(--slate);
  font-size: 13px;
  margin-bottom: 36px;
  display: block;
}
.content-page h2{
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--chalk-cyan);
  margin-top: 34px;
}
.content-page p, .content-page li{
  color: var(--paper-dim);
  font-size: 15px;
}
.content-page a{ color: var(--signal-amber); }
.content-page ul{ padding-left: 20px; }

.contact-box{
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: var(--radius);
  padding: 26px;
  margin-top: 28px;
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
}
.contact-box .email{
  font-family: var(--font-display);
  color: var(--signal-amber);
  font-size: 17px;
}

/* ---------- Footer ---------- */
footer.site{
  border-top: 1px solid var(--panel-line);
  padding: 40px 0;
  position: relative;
  z-index: 1;
}
.footer-grid{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-links{
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13.5px;
}
.footer-links a{ color: var(--paper-dim); }
.copyright{
  color: var(--slate);
  font-size: 13px;
  margin-top: 18px;
}
.footer-disclaimer{
  color: var(--slate);
  font-size: 12.5px;
  margin-top: 10px;
  max-width: 700px;
  line-height: 1.6;
}

@media (max-width: 600px){
  .hero{ padding: 48px 0 24px; }
  .tool-panel{ padding: 20px; }
  section{ padding: 44px 0; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}