/* ============================================================
   FONTANERÍA CALEFACCIÓN SÁNCHEZ GÓMEZ
   Hardware-shop system: off-white walls, rust/copper, navy.
   Signage type, square frames. No cream-paper editorial,
   no fashion 01/02 numbers, no pills or wave dividers.
   ============================================================ */

:root {
  --cream:   #f4f3ef;   /* off-white shop walls, not cream paper */
  --paper:   #ffffff;
  --ink:     #1a2744;   /* navy */
  --ink-soft:#4d5a6a;
  --line:    #d5d2cc;
  --water:   #1e4a7a;   /* pipe navy */
  --heat:    #b4532a;   /* rust / copper */
  --brass:   #b56e32;   /* copper-brass links, CTAs */
  --dark:    #1a2744;   /* navy footer / ticker */
  --dark-ink:#f4f3ef;

  --serif: "Roboto Condensed", "Arial Narrow", sans-serif;
  --sans: "Roboto", Arial, sans-serif;

  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; margin: 0; color: var(--ink); letter-spacing: 0.01em; }
p { margin: 0; }
.container { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
}

.icon { width: 1em; height: 1em; stroke: currentColor; fill: none; stroke-width: 1.8; vertical-align: -0.15em; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  background: transparent;
  color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-solid { background: var(--ink); color: var(--cream); }
.btn-solid:hover { background: var(--heat); border-color: var(--heat); }
.btn-line:hover { background: var(--ink); color: var(--cream); }
.btn-small { padding: 9px 16px; font-size: 0.85rem; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--cream);
  position: relative;
  z-index: 20;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 20px;
}
.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.28rem;
  line-height: 1.1;
  color: var(--ink);
}
.wordmark small {
  display: block;
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--brass);
  margin-top: 3px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a:not(.btn) {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.nav-links a:not(.btn):hover { color: var(--ink); border-color: var(--brass); }
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 3px;
  cursor: pointer;
}
.burger span { width: 16px; height: 2px; background: var(--ink); margin: 0 auto; transition: 0.2s; }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 0; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding-bottom: 56px;
}
.hero h1 {
  font-size: clamp(2.3rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  margin: 14px 0 20px;
}
.hero h1 em { font-style: normal; color: var(--heat); }
.hero-sub {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.frame {
  position: relative;
  border: 1.5px solid var(--ink);
  padding: 10px;
  background: var(--paper);
}
.frame img { width: 100%; height: 380px; object-fit: cover; }
.frame-tag {
  position: absolute;
  top: -14px;
  left: 22px;
  background: var(--heat);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 14px;
}

/* ---------- Ticker strip ---------- */
.ticker {
  background: var(--dark);
  color: var(--dark-ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.ticker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 16px 0;
}
.ticker-row span {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0 22px;
  border-left: 1px solid rgba(244,243,239,0.22);
}
.ticker-row span:first-child { border-left: none; padding-left: 0; }

/* ---------- Section rhythm ---------- */
section { padding: 76px 0; }
.section-head { margin-bottom: 40px; max-width: 60ch; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-top: 10px; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: center;
}
.about-grid .frame img { height: 420px; }
.about-body p { color: var(--ink-soft); margin-bottom: 16px; }
.legal-line {
  font-size: 0.85rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 22px;
}
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink-soft);
}

/* ---------- Services ---------- */
.services { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.service-list { border-top: 1px solid var(--line); }
.service-row {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 28px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.service-row[data-accent="water"] h3 { color: var(--water); }
.service-row[data-accent="heat"] h3 { color: var(--heat); }
.service-row[data-accent="mix"] h3 { color: var(--brass); }
.service-row h3 { font-size: 1.35rem; text-transform: uppercase; letter-spacing: 0.04em; }
.service-row p { color: var(--ink-soft); max-width: 52ch; }

/* ---------- Proof / stats ---------- */
.proof { background: var(--dark); color: var(--dark-ink); }
.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.proof-item {
  text-align: center;
  padding: 0 14px;
  border-left: 1px solid rgba(244,243,239,0.2);
}
.proof-item:first-child { border-left: none; }
.proof-num {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 700;
  color: var(--dark-ink);
}
.proof-label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(244,243,239,0.65);
  margin-top: 6px;
}

/* ---------- Reviews ---------- */
.reviews-box {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.reviews-score { display: flex; align-items: baseline; gap: 10px; }
.reviews-score strong { font-family: var(--serif); font-size: 2.4rem; font-weight: 700; }
.reviews-score span { color: var(--ink-soft); font-size: 0.95rem; }
.reviews-note { color: var(--ink-soft); font-size: 0.95rem; max-width: 40ch; }

/* ---------- Contact ---------- */
.contact { background: var(--paper); border-top: 1px solid var(--line); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.info-list { border-top: 1px solid var(--line); margin-top: 24px; }
.info-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.info-item .icon { flex-shrink: 0; margin-top: 3px; color: var(--brass); font-size: 1.15rem; }
.info-item strong { display: block; font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 3px; }
.info-item a, .info-item span.value { font-size: 1rem; color: var(--ink); }
.info-item a:hover { color: var(--brass); }

.form-card {
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 30px;
}
.form-card h3 { font-size: 1.15rem; margin-bottom: 6px; }
.form-card .form-note { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 20px; }
.field { margin-bottom: 14px; }
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--brass); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-msg { font-size: 0.88rem; margin-top: 12px; min-height: 1.2em; }
.form-msg.success { color: var(--water); }
.form-msg.error { color: var(--heat); }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark); color: var(--dark-ink); padding: 48px 0 26px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; padding-bottom: 26px; border-bottom: 1px solid rgba(244,243,239,0.18); }
.footer-grid img { height: 30px; }
.footer-address { font-size: 0.9rem; color: rgba(244,243,239,0.75); text-align: right; line-height: 1.6; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 20px; font-size: 0.8rem; color: rgba(244,243,239,0.55); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-links { position: fixed; inset: 0 0 0 auto; width: min(80vw, 320px); background: var(--paper); flex-direction: column; align-items: flex-start; padding: 90px 28px 28px; gap: 22px; transform: translateX(100%); transition: transform 0.25s ease; box-shadow: -8px 0 30px rgba(0,0,0,0.12); }
  .nav-links.open { transform: translateX(0); }
  .burger { display: flex; }
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-grid .frame { order: -1; }
  .service-row { grid-template-columns: 1fr; }
  .service-row > p { grid-column: 1 / -1; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .proof-item:nth-child(3) { border-left: none; }
  .footer-address { text-align: left; }
  .field-row { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .frame img, .about-grid .frame img { height: 260px; }
}