/* ===== ENVSENSOR.cloud — Global Stylesheet ===== */

:root {
  --clr-bg:        #0b1120;
  --clr-surface:   #131a2e;
  --clr-card:      #19223a;
  --clr-border:    #263354;
  --clr-primary:   #38bdf8;
  --clr-accent:    #22d3ee;
  --clr-green:     #34d399;
  --clr-orange:    #fb923c;
  --clr-red:       #f87171;
  --clr-purple:    #a78bfa;
  --clr-text:      #e2e8f0;
  --clr-text-dim:  #94a3b8;
  --clr-text-bright:#f8fafc;
  --font-sans:     'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --radius:        10px;
  --radius-sm:     6px;
  --shadow:        0 4px 24px rgba(0,0,0,.35);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--clr-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--clr-accent); }

img { max-width: 100%; display: block; }

/* ---------- Utility ---------- */
.container { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* ---------- Header / Nav ---------- */
header {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--clr-text-bright);
  letter-spacing: -.02em;
}

.logo span { color: var(--clr-primary); }

nav { display: flex; gap: 1.75rem; }

nav a {
  color: var(--clr-text-dim);
  font-size: .9rem;
  font-weight: 500;
  position: relative;
  padding: .25rem 0;
}

nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--clr-primary);
  transition: width .25s;
}

nav a:hover,
nav a.active { color: var(--clr-text-bright); }

nav a:hover::after,
nav a.active::after { width: 100%; }

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; color: var(--clr-text); font-size: 1.5rem; cursor: pointer; }

@media (max-width: 700px) {
  .nav-toggle { display: block; }
  nav {
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: 1rem 1.5rem;
    gap: .75rem;
    display: none;
  }
  nav.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(56,189,248,.08) 0%, transparent 70%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--clr-text-bright);
  letter-spacing: -.03em;
}

.hero h1 span { color: var(--clr-primary); }

.hero p {
  max-width: 620px;
  margin: 1rem auto 0;
  font-size: 1.1rem;
  color: var(--clr-text-dim);
}

.hero-buttons {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: .925rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background .2s, transform .15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-bg);
}

.btn-primary:hover { background: var(--clr-accent); color: var(--clr-bg); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
}

.btn-outline:hover { border-color: var(--clr-primary); color: var(--clr-primary); }

/* ---------- Section ---------- */
section { padding: 4rem 0; }

section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--clr-text-bright);
  margin-bottom: .5rem;
}

section h2 span { color: var(--clr-primary); }

section > .container > p.section-sub {
  color: var(--clr-text-dim);
  max-width: 640px;
  margin-bottom: 2.5rem;
}

/* ---------- Cards Grid ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color .25s, box-shadow .25s;
}

.card:hover {
  border-color: var(--clr-primary);
  box-shadow: 0 0 20px rgba(56,189,248,.08);
}

.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.card-icon.temp  { background: rgba(251,146,60,.12); color: var(--clr-orange); }
.card-icon.water { background: rgba(56,189,248,.12); color: var(--clr-primary); }
.card-icon.air   { background: rgba(52,211,153,.12); color: var(--clr-green); }
.card-icon.damp  { background: rgba(167,139,250,.12); color: var(--clr-purple); }

.card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--clr-text-bright);
  margin-bottom: .4rem;
}

.card p { font-size: .9rem; color: var(--clr-text-dim); }

/* ---------- API Spec Tables ---------- */
.spec-block {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.spec-block summary,
.spec-block-header {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--clr-border);
}

.spec-block[open] summary { border-bottom: 1px solid var(--clr-border); }

.method {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.method.get    { background: rgba(52,211,153,.15); color: var(--clr-green); }
.method.post   { background: rgba(56,189,248,.15); color: var(--clr-primary); }
.method.delete { background: rgba(248,113,113,.15); color: var(--clr-red); }

.endpoint {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--clr-text-bright);
}

.spec-body { padding: 1.25rem; }
.spec-body p { margin-bottom: .75rem; font-size: .9rem; color: var(--clr-text-dim); }

.spec-body h4 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--clr-text-dim);
  margin: 1.25rem 0 .5rem;
}

.spec-body h4:first-child { margin-top: 0; }

table.param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

table.param-table th {
  text-align: left;
  padding: .5rem .75rem;
  background: var(--clr-surface);
  color: var(--clr-text-dim);
  font-weight: 600;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

table.param-table td {
  padding: .55rem .75rem;
  border-top: 1px solid var(--clr-border);
  color: var(--clr-text);
}

table.param-table td code {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--clr-accent);
}

pre.code-block {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.7;
  color: var(--clr-text);
}

pre.code-block .key   { color: var(--clr-primary); }
pre.code-block .str   { color: var(--clr-green); }
pre.code-block .num   { color: var(--clr-orange); }
pre.code-block .bool  { color: var(--clr-purple); }
pre.code-block .null  { color: var(--clr-text-dim); }

/* ---------- Sensor Schema Table ---------- */
table.schema-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
  margin-bottom: 1.5rem;
}

table.schema-table th {
  text-align: left;
  padding: .6rem 1rem;
  background: var(--clr-surface);
  color: var(--clr-text-dim);
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}

table.schema-table td {
  padding: .6rem 1rem;
  border-top: 1px solid var(--clr-border);
}

table.schema-table td code {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--clr-accent);
}

.badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 4px;
  font-size: .72rem;
  font-weight: 600;
}

.badge.required { background: rgba(248,113,113,.15); color: var(--clr-red); }
.badge.optional { background: rgba(148,163,184,.12); color: var(--clr-text-dim); }

/* ---------- Info Banner ---------- */
.info-banner {
  background: rgba(56,189,248,.06);
  border: 1px solid rgba(56,189,248,.2);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  font-size: .9rem;
}

.info-banner .icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.info-banner code { font-family: var(--font-mono); color: var(--clr-accent); font-size: .85rem; }

/* ---------- Contact Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 700px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem;
}

.contact-info-card h3 {
  font-size: 1.15rem;
  color: var(--clr-text-bright);
  margin-bottom: 1.25rem;
}

.contact-item {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.contact-item .ci-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(56,189,248,.1);
  color: var(--clr-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-item .ci-text strong {
  display: block;
  font-size: .85rem;
  color: var(--clr-text-bright);
}

.contact-item .ci-text span {
  font-size: .85rem;
  color: var(--clr-text-dim);
}

form.contact-form {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

form.contact-form h3 {
  font-size: 1.15rem;
  color: var(--clr-text-bright);
  margin-bottom: .25rem;
}

form.contact-form label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--clr-text-dim);
  margin-bottom: .25rem;
  display: block;
}

form.contact-form input,
form.contact-form textarea,
form.contact-form select {
  width: 100%;
  padding: .65rem .85rem;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: .9rem;
  transition: border-color .2s;
}

form.contact-form input:focus,
form.contact-form textarea:focus,
form.contact-form select:focus {
  outline: none;
  border-color: var(--clr-primary);
}

form.contact-form textarea { resize: vertical; min-height: 110px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
footer {
  margin-top: auto;
  padding: 2rem 0;
  border-top: 1px solid var(--clr-border);
  text-align: center;
  font-size: .82rem;
  color: var(--clr-text-dim);
}

footer a { color: var(--clr-text-dim); }
footer a:hover { color: var(--clr-primary); }

/* ---------- Misc / Animations ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  animation: fadeUp .5s ease-out both;
}

.fade-up:nth-child(2) { animation-delay: .08s; }
.fade-up:nth-child(3) { animation-delay: .16s; }
.fade-up:nth-child(4) { animation-delay: .24s; }

/* Version badge */
.version-badge {
  display: inline-block;
  padding: .2rem .6rem;
  background: rgba(56,189,248,.1);
  border: 1px solid rgba(56,189,248,.25);
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--clr-primary);
  margin-bottom: 1rem;
}

/* TOC sidebar */
.spec-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  align-items: flex-start;
}

@media (max-width: 860px) {
  .spec-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
}

.toc {
  position: sticky;
  top: 84px;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.toc h4 {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--clr-text-dim);
  margin-bottom: .75rem;
}

.toc ul { list-style: none; }
.toc li { margin-bottom: .4rem; }
.toc a {
  font-size: .84rem;
  color: var(--clr-text-dim);
}
.toc a:hover { color: var(--clr-primary); }