/* ===========================================================================
   Apex Comfort — HVAC Template Stylesheet
   Mobile-first. Base styles target 375px+, desktop overrides at 768px+.
   BEM naming. Self-hosted WOFF2 fonts. No @import, no external URLs.
   =========================================================================== */

/* ---- Fonts ---------------------------------------------------------------- */

@font-face {
  font-family: 'DM Serif Display';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/dm-serif-display-400.woff2') format('woff2');
}

@font-face {
  font-family: 'DM Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/dm-sans-400.woff2') format('woff2');
}

@font-face {
  font-family: 'DM Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/fonts/dm-sans-500.woff2') format('woff2');
}

@font-face {
  font-family: 'DM Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/fonts/dm-sans-700.woff2') format('woff2');
}

/* ---- Design tokens -------------------------------------------------------- */

:root {
  /* Brand colors */
  --color-bg: #1A1814;
  --color-bg-card: #2A2722;
  --color-text: #F0EDE6;
  --color-text-dim: #B8B2A4;
  --color-text-muted: #A3998A;
  --color-accent: #EF9F27;
  --color-accent-soft: rgba(239, 159, 39, 0.12);
  --color-error: #E8573E;
  --color-error-soft: rgba(232, 87, 62, 0.12);
  --color-border: #332F29;
  --color-border-strong: #4A443C;

  /* Typography */
  --font-serif: 'DM Serif Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing scale */
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-20: 5rem;

  /* Layout */
  --max-width: 1200px;
  --gutter: 1.25rem;
  --bottom-bar-height: 72px;
  --radius: 10px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 220ms;
}

/* ---- Reset / base --------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0 0 var(--bottom-bar-height) 0;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 var(--space-4) 0;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-4) 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration) var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--color-text);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* ---- Layout primitives ---------------------------------------------------- */

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---- Nav ------------------------------------------------------------------ */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(26, 24, 20, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}

.nav__brand {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav__brand-accent {
  color: var(--color-accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__lang {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-dim);
  white-space: nowrap;
}

.nav__lang-active {
  color: var(--color-text);
  font-weight: 700;
}

.nav__lang-divider {
  color: var(--color-text-muted);
  padding-inline: 0.2em;
}

.nav__phone {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
}

/* ---- Hero ----------------------------------------------------------------- */

.hero {
  padding: var(--space-10) 0 var(--space-12) 0;
  background:
    radial-gradient(ellipse at 10% 0%, rgba(239, 159, 39, 0.08), transparent 50%),
    var(--color-bg);
}

.hero__location {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  margin-bottom: var(--space-5);
}

.hero__title {
  font-size: clamp(2.2rem, 8vw, 3.4rem);
  margin-bottom: var(--space-5);
}

.hero__title-accent {
  color: var(--color-accent);
}

.hero__sub {
  font-size: 1.1rem;
  color: var(--color-text-dim);
  max-width: 44ch;
  margin-bottom: var(--space-6);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: transform var(--duration) var(--ease), background var(--duration) var(--ease);
}

.hero__cta:hover,
.hero__cta:focus-visible {
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-1px);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.hero__stat-value {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 6vw, 2.2rem);
  color: var(--color-accent);
  line-height: 1.1;
  margin-bottom: 0.2rem;
}

.hero__stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* ---- Section defaults ----------------------------------------------------- */

.section {
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.section__eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  margin-bottom: var(--space-8);
  max-width: 24ch;
}

/* ---- Services ------------------------------------------------------------- */

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.service {
  padding: var(--space-5) var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.service:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.service--emergency {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, var(--color-accent-soft), var(--color-bg-card));
}

.service__icon {
  font-size: 1.6rem;
  margin-bottom: var(--space-3);
  display: block;
  line-height: 1;
}

.service__name {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.service__desc {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin: 0;
  line-height: 1.45;
}

/* ---- Why Us --------------------------------------------------------------- */

.whyus__grid {
  display: grid;
  gap: var(--space-8);
}

.whyus__statement {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 5.5vw, 2.2rem);
  line-height: 1.2;
  margin: 0;
}

.whyus__statement-accent {
  color: var(--color-accent);
}

.whyus__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-5);
}

.whyus__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
}

.whyus__marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.whyus__item-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.2rem 0;
}

.whyus__item-body {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin: 0;
  line-height: 1.55;
}

/* ---- Reviews -------------------------------------------------------------- */

.reviews__grid {
  display: grid;
  gap: var(--space-4);
}

.review {
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.review__stars {
  color: var(--color-accent);
  letter-spacing: 0.1em;
  font-size: 1rem;
  margin-bottom: var(--space-3);
}

.review__body {
  font-size: 0.98rem;
  color: var(--color-text);
  line-height: 1.55;
  margin-bottom: var(--space-4);
}

.review__author {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

.review__author-name {
  color: var(--color-text);
  font-weight: 700;
}

/* ---- FAQ ------------------------------------------------------------------ */

.faq__list {
  display: grid;
  gap: var(--space-3);
}

.faq__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq__item[open] {
  border-color: var(--color-border-strong);
}

.faq__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq__question::-webkit-details-marker { display: none; }

.faq__question-text {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
}

.faq__toggle {
  flex-shrink: 0;
  width: 1.4em;
  height: 1.4em;
  position: relative;
  color: var(--color-accent);
}

.faq__toggle::before,
.faq__toggle::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 2px;
  background: currentColor;
  transition: transform var(--duration) var(--ease);
  transform-origin: center;
}

.faq__toggle::after {
  transform: rotate(90deg);
}

.faq__item[open] .faq__toggle::after {
  transform: rotate(0deg);
}

.faq__answer {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-dim);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---- Contact form --------------------------------------------------------- */

.contact__grid {
  display: grid;
  gap: var(--space-8);
}

.contact__phone-block {
  text-align: center;
}

.contact__phone-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.contact__phone-number {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 8vw, 2.6rem);
  color: var(--color-accent);
  display: block;
  line-height: 1.1;
}

.form {
  display: grid;
  gap: var(--space-4);
}

.form__field {
  display: grid;
  gap: 0.4rem;
}

.form__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-dim);
}

.form__input,
.form__select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  -webkit-appearance: none;
  appearance: none;
}

.form__select {
  background-image: linear-gradient(45deg, transparent 50%, var(--color-accent) 50%),
                    linear-gradient(135deg, var(--color-accent) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.5rem;
}

.form__submit {
  margin-top: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--duration) var(--ease), background var(--duration) var(--ease);
}

.form__submit:hover,
.form__submit:focus-visible {
  background: var(--color-text);
  transform: translateY(-1px);
}

.form__feedback {
  display: none;
  padding: var(--space-4);
  border-radius: var(--radius);
  color: var(--color-text);
  font-weight: 500;
  text-align: center;
  border: 1px solid transparent;
}

.form__feedback--visible {
  display: block;
}

.form__feedback--success {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.form__feedback--error {
  background: var(--color-error-soft);
  border-color: var(--color-error);
}

/* ---- Footer --------------------------------------------------------------- */

.footer {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.footer__grid {
  display: grid;
  gap: var(--space-6);
}

.footer__title {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.3rem;
}

.footer__link {
  color: var(--color-text-dim);
}

.footer__copy {
  padding-top: var(--space-6);
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.82rem;
}

/* ---- Persistent bottom bar ------------------------------------------------ */

.bottombar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  height: var(--bottom-bar-height);
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.35);
}

.bottombar__link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  height: 100%;
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.005em;
}

.bottombar__link:hover,
.bottombar__link:focus-visible {
  color: var(--color-bg);
  background: rgba(0, 0, 0, 0.08);
}

.bottombar__icon {
  font-size: 1.2rem;
  line-height: 1;
}

.bottombar__label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-right: 0.3rem;
}

/* ===========================================================================
   Desktop overrides — only at 768px and up
   =========================================================================== */

@media (min-width: 768px) {
  :root {
    --gutter: 2rem;
  }

  body {
    padding-bottom: 0;
  }

  .nav__inner {
    padding-block: var(--space-4);
  }

  .nav__brand {
    font-size: 1.6rem;
  }

  .nav__phone {
    font-size: 1.05rem;
  }

  .hero {
    padding: var(--space-20) 0;
  }

  .hero__cta {
    width: auto;
  }

  .hero__stats {
    gap: var(--space-6);
  }

  .section {
    padding-block: var(--space-20);
  }

  .services__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  .service {
    padding: var(--space-6);
  }

  .whyus__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-12);
    align-items: start;
  }

  .reviews__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .contact__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-12);
    align-items: start;
  }

  .contact__phone-block {
    text-align: left;
    position: sticky;
    top: 100px;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-10);
  }

  .bottombar {
    display: none;
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: 3.8rem;
  }
}

/* ---- Reduced motion ------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}