/* =========================================
   Summit Air HVAC — Style System
   ========================================= */

:root {
  /* Color palette — deep navy + warm amber */
  --color-primary: #1a2744;
  --color-primary-light: #243556;
  --color-accent: #e8913a;
  --color-accent-hover: #d47e2c;
  --color-accent-glow: rgba(232, 145, 58, 0.15);
  --color-surface: #f7f5f2;
  --color-surface-alt: #edeae5;
  --color-white: #ffffff;
  --color-text: #1a2744;
  --color-text-muted: #5a6478;
  --color-border: #d8d4ce;

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  /* Spacing */
  --section-pad: clamp(4rem, 8vw, 7rem);
  --container-max: 1200px;
  --radius: 12px;
  --radius-lg: 20px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn--lg {
  padding: 0.9rem 2rem;
  font-size: 1rem;
}

.btn--full { width: 100%; justify-content: center; }

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 2px 12px rgba(232, 145, 58, 0.35);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(232, 145, 58, 0.45);
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}
.btn--white:hover {
  background: var(--color-surface);
  transform: translateY(-1px);
}

.btn--outline-white {
  border: 2px solid rgba(255,255,255,0.5);
  color: var(--color-white);
  background: transparent;
}
.btn--outline-white:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.1);
}

.btn--nav {
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
}
.btn--nav:hover { background: var(--color-accent-hover); }

/* ---- SECTION HEADERS ---- */
.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  line-height: 1.7;
}

.section-header {
  margin-bottom: 3rem;
}

.section-header--center {
  text-align: center;
}
.section-header--center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.nav--scrolled {
  background: rgba(26, 39, 68, 0.95);
  backdrop-filter: blur(12px);
  padding: 0.6rem 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__links a:not(.btn) {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav__links a:not(.btn):hover { color: var(--color-white); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: var(--color-primary);
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 20% 80%, rgba(232, 145, 58, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 20%, rgba(36, 53, 86, 0.8) 0%, transparent 60%),
    linear-gradient(180deg, #1a2744 0%, #0f1a2e 100%);
}

.hero__grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 8rem clamp(1.25rem, 4vw, 2rem) 4rem;
}

.hero__badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  background: rgba(232, 145, 58, 0.12);
  border: 1px solid rgba(232, 145, 58, 0.25);
  padding: 0.45rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.08;
  margin-bottom: 1.25rem;
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--color-accent), #f4c06a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.65);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
}

.hero__trust-item svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ---- SERVICES ---- */
.services {
  padding: var(--section-pad) 0;
  background: var(--color-surface);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(26, 39, 68, 0.08);
}

.service-card:hover::before { transform: scaleX(1); }

.service-card__icon {
  width: 56px;
  height: 56px;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--color-primary);
}

.service-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.service-card__tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
}

/* ---- WHY US ---- */
.why {
  padding: var(--section-pad) 0;
  background: var(--color-white);
}

.why__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.why__text {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.why__stats {
  display: flex;
  gap: 2.5rem;
}

.why__stat {
  text-align: left;
}

.why__stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
}

.why__stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.why__right {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.why__card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.why__card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(232, 145, 58, 0.08);
}

.why__card-number {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.why__card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--color-primary);
}

.why__card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---- REVIEWS ---- */
.reviews {
  padding: var(--section-pad) 0;
  background: var(--color-surface);
}

.reviews__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.review-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(26, 39, 68, 0.07);
}

.review-card__stars {
  display: flex;
  gap: 2px;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.review-card__text {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  font-style: italic;
}

.review-card__author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.review-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.review-card__author strong {
  display: block;
  font-size: 0.95rem;
}

.review-card__author span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- CTA ---- */
.cta {
  padding: 0;
}

.cta__inner {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 5vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}

.cta__inner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 145, 58, 0.15), transparent 70%);
  pointer-events: none;
}

.cta__title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.cta__text {
  color: rgba(255,255,255,0.65);
  font-size: 1rem;
  max-width: 420px;
}

.cta__actions {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

/* ---- CONTACT ---- */
.contact {
  padding: var(--section-pad) 0;
  background: var(--color-white);
}

.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4rem;
  align-items: start;
}

.contact__text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact__detail {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.contact__detail svg {
  color: var(--color-accent);
  margin-top: 2px;
  flex-shrink: 0;
}

.contact__detail strong {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.15rem;
  font-family: var(--font-heading);
}

.contact__detail a,
.contact__detail span {
  font-size: 1rem;
  color: var(--color-text);
}

.contact__detail a:hover { color: var(--color-accent); }

.contact__hours strong {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
  font-family: var(--font-heading);
}

.contact__hours p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
}

/* Form */
.contact__form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-white);
  color: var(--color-text);
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #aaa;
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

/* Form success */
.form-success {
  text-align: center;
  padding: 3rem 2rem;
}

.form-success__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  color: #2ecc71;
}

.form-success h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.form-success p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* ---- FOOTER ---- */
.footer {
  background: var(--color-primary);
  padding: 4rem 0 2rem;
  color: rgba(255,255,255,0.6);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer__brand .nav__logo { margin-bottom: 1rem; }
.footer__brand p { font-size: 0.95rem; line-height: 1.7; max-width: 320px; }

.footer__links h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer__links a {
  display: block;
  font-size: 0.9rem;
  padding: 0.3rem 0;
  transition: color 0.2s;
}
.footer__links a:hover { color: var(--color-accent); }

.footer__bottom {
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
}

/* ---- REVEAL ANIMATION ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---- MOBILE ---- */
@media (max-width: 900px) {
  .services__grid { grid-template-columns: 1fr 1fr; }
  .reviews__grid { grid-template-columns: 1fr; }
  .why__layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact__layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .cta__inner { flex-direction: column; text-align: center; }
  .cta__actions { flex-direction: column; width: 100%; }
  .cta__actions .btn { width: 100%; justify-content: center; }
  .footer__inner { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 640px) {
  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: var(--color-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 1.25rem;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    box-shadow: -4px 0 30px rgba(0,0,0,0.3);
  }

  .nav__links.open { transform: translateX(0); }

  .nav__links a:not(.btn) {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
  }

  .nav__links .btn--nav {
    width: 100%;
    justify-content: center;
    margin-top: 0.5rem;
  }

  .nav__toggle { display: flex; }

  .nav__toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav__toggle.active span:nth-child(2) { opacity: 0; }
  .nav__toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .services__grid { grid-template-columns: 1fr; }

  .hero__content { padding-top: 6rem; }

  .hero__title {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .hero__trust { flex-direction: column; gap: 0.75rem; }

  .why__stats { gap: 1.5rem; }
  .why__stat-number { font-size: 2rem; }

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

  .contact__form { padding: 1.5rem; }
}

/* Overlay for mobile menu */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ---- FOCUS VISIBLE ---- */
.btn:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.form-group input:focus-visible,
.form-group select:focus-visible,
.form-group textarea:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}