/* ============================================================
   ปฏิภาณ รักษาดี — Personal Homepage
   Design tokens
   Color:
     --bg        #0a0f0c  (near-black, slight green tint)
     --surface   #121a16  (card / panel background)
     --surface-2 #1a2620  (raised panel / hover)
     --line      #24352c  (hairline borders)
     --text      #dfeee6  (primary text)
     --muted     #7f9a8d  (secondary text)
     --accent    #39ff88  (neon green — signal / CTA)
     --accent-dim#1f7a4c  (dimmed neon, for secondary emphasis)
   Type:
     Display : 'Space Grotesk' — headings, big numbers
     Body    : 'Inter'         — paragraphs, UI copy
     Mono    : 'JetBrains Mono'— labels, terminal lines, code, slot codes
   Layout:
     Page shell = CSS Grid (nav / main / footer regions)
     Components = Flexbox (nav links, card rows, form rows, tag lists)
   Signature:
     Homepage terminal "boot sequence" + Portfolio as a vending-machine
     slot selector (A1, A2, B1...) — ties the whole site back to the
     student's own project (VendingMachine simulator).
   ============================================================ */

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

:root{
  --bg: #0a0f0c;
  --surface: #121a16;
  --surface-2: #1a2620;
  --line: #24352c;
  --text: #dfeee6;
  --muted: #7f9a8d;
  --accent: #39ff88;
  --accent-dim: #1f7a4c;
  --radius: 10px;
  --maxw: 1080px;
}

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

body{
  margin: 0;
  background:
    radial-gradient(ellipse at top, rgba(57,255,136,0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  line-height: 1.65;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

h1,h2,h3{
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}
h1{ font-size: clamp(1.9rem, 4vw, 2.9rem); }
h2{ font-size: clamp(1.3rem, 2.6vw, 1.8rem); color: var(--accent); }
h3{ font-size: 1.05rem; }

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mono{ font-family: 'JetBrains Mono', monospace; }
.muted{ color: var(--muted); }

/* ---------- Header / Nav (Grid shell + Flex nav row) ---------- */
header.site{
  border-bottom: 1px solid var(--line);
  background: rgba(10,15,12,0.85);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: .9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand{
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.brand .dot{
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
nav.menu ul{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  margin: 0; padding: 0;
}
nav.menu a{
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: .88rem;
  padding: .4rem .7rem;
  border-radius: 6px;
  text-decoration: none;
}
nav.menu a:hover, nav.menu a[aria-current="page"]{
  color: var(--bg);
  background: var(--accent);
}

/* ---------- Main / page grid ---------- */
main{
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: 2.4rem 1.25rem 3rem;
  display: grid;
  gap: 2.2rem;
}

section{
  display: grid;
  gap: 1rem;
}

.eyebrow{
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent-dim);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ---------- Terminal boot block (signature, homepage) ---------- */
.terminal{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .92rem;
  color: var(--accent);
  overflow: hidden;
  white-space: pre-wrap;
}
.terminal .caret{
  display: inline-block;
  width: .55em; height: 1.05em;
  background: var(--accent);
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink{ 50%{ opacity: 0; } }

/* ---------- Hero ---------- */
.hero{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2rem;
  align-items: center;
}
@media (max-width: 720px){ .hero{ grid-template-columns: 1fr; } }

.hero-photo{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  aspect-ratio: 4/5;
  display: flex; align-items: center; justify-content: center;
}
.hero-photo img{ width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Cards (Flexbox rows -> grid of cards) ---------- */
.cards{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}
.card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.card:hover{ border-color: var(--accent-dim); }

/* ---------- Vending machine slot grid (Portfolio signature) ---------- */
.vending{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
}
.slot-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.slot{
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  position: relative;
}
.slot-code{
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: .8rem;
  position: absolute;
  top: .7rem; right: .8rem;
}
.slot-actions{
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-top: auto;
}

/* ---------- Buttons ---------- */
.btn{
  font-family: 'JetBrains Mono', monospace;
  font-size: .82rem;
  padding: .5rem .9rem;
  border-radius: 6px;
  border: 1px solid var(--accent-dim);
  color: var(--accent);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
.btn:hover{
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
}
.btn.primary{
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn.primary:hover{ filter: brightness(1.1); }

/* ---------- Tags / skills ---------- */
.tags{ display: flex; flex-wrap: wrap; gap: .5rem; }
.tag{
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  padding: .3rem .6rem;
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  color: var(--accent);
}

/* ---------- Timeline (CV / education) ---------- */
.timeline{ display: grid; gap: 1rem; }
.tl-item{
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  border-left: 2px solid var(--accent-dim);
  padding-left: 1rem;
}
.tl-item time{ font-family: 'JetBrains Mono', monospace; color: var(--muted); font-size: .85rem; }
@media (max-width: 560px){ .tl-item{ grid-template-columns: 1fr; } }

/* ---------- Gallery ---------- */
.gallery-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.gallery-grid figure{
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.gallery-grid img{ width: 100%; display: block; aspect-ratio: 4/3; object-fit: cover; }
.gallery-grid figcaption{
  padding: .6rem .8rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  color: var(--muted);
}

/* ---------- Contact form (Flexbox rows) ---------- */
form.contact{
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 560px;
}
.field{ display: flex; flex-direction: column; gap: .4rem; }
label{ font-family: 'JetBrains Mono', monospace; font-size: .8rem; color: var(--muted); }
input, textarea{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .65rem .8rem;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: .95rem;
}
textarea{ resize: vertical; min-height: 120px; }
input:focus, textarea:focus{ border-color: var(--accent); }

.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 720px){ .contact-grid{ grid-template-columns: 1fr; } }

.contact-list{ list-style: none; padding: 0; margin: 0; display: grid; gap: .7rem; }
.contact-list li{ display: flex; gap: .6rem; align-items: baseline; }
.contact-list span.k{ font-family:'JetBrains Mono', monospace; color: var(--muted); min-width: 90px; }

/* ---------- Footer ---------- */
footer.site{
  border-top: 1px solid var(--line);
  padding: 1.4rem 1.25rem;
}
footer.site .foot-wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .82rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ---------- Utility ---------- */
.status-ok::before{ content: "● "; color: var(--accent); }
.divider{ height: 1px; background: var(--line); border: 0; margin: .5rem 0; }

@media (prefers-reduced-motion: reduce){
  .terminal .caret{ animation: none; }
}

/* ============================================================
   HW9 additions — Dynamic (ASP.NET + JavaScript + Guestbook)
   ============================================================ */

/* Server-info panel (ASP.NET <%= %> output) */
.server-info{
  background: var(--surface);
  border: 1px dashed var(--accent-dim);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  display: grid;
  gap: .4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .85rem;
}
.server-info .k{ color: var(--muted); }
.server-info .v{ color: var(--accent); }

/* Notice banner (form submission confirmation from server) */
.notice{
  border: 1px solid var(--accent);
  background: rgba(57,255,136,0.08);
  color: var(--accent);
  border-radius: 8px;
  padding: .8rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .88rem;
}
.notice.error{
  border-color: #ff5566;
  background: rgba(255,85,102,0.08);
  color: #ff8b98;
}

/* Show/hide detail toggle */
.detail-panel{
  border-top: 1px dashed var(--line);
  margin-top: .6rem;
  padding-top: .6rem;
  display: none;
}
.detail-panel.open{ display: block; }
.toggle-btn{
  background: none;
  border: none;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: .82rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

/* Guestbook */
.guestbook-list{
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  gap: .7rem;
}
.guestbook-list li{
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: .7rem .9rem;
  font-size: .93rem;
}
.guestbook-list li strong{ color: var(--accent); }
.field-error{
  color: #ff8b98;
  font-size: .78rem;
  font-family: 'JetBrains Mono', monospace;
}

/* Badge for dynamic pages */
.badge-dynamic{
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  color: var(--bg);
  background: var(--accent);
  padding: .15rem .5rem;
  border-radius: 999px;
  margin-left: .5rem;
  vertical-align: middle;
}