/* ============================================
   PROMINENT ROOFING — PROFESSIONAL CSS
   Design System: 8px spacing, Inter typography
   ============================================ */

:root {
  --clr-primary: #C41E3A;
  --clr-primary-dark: #7A1629;
  --clr-bg: #ffffff;
  --clr-surface: #f5f5f5;
  --clr-text: #1a1a1a;
  --clr-text-secondary: #666666;
  --clr-border: #e0e0e0;
  --clr-accent: #0066ff;

  --font-display: "Plus Jakarta Sans", sans-serif;
  --font-body: "Inter", sans-serif;
  
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 16px;
  --spacing-4: 24px;
  --spacing-5: 32px;
  --spacing-6: 48px;
  --spacing-7: 64px;

  --radius: 8px;
  --radius-lg: 16px;
  
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);

  --transition: 150ms cubic-bezier(0.2, 0.3, 0.25, 0.46);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--clr-text);
  background: var(--clr-bg);
  overflow-x: hidden;
}

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

a {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--clr-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(28px, 4.5vw, 44px); }
h3 { font-size: 20px; }
h4 { font-size: 18px; }

p { margin-bottom: var(--spacing-3); }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-3);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--clr-primary);
  color: white;
  padding: var(--spacing-2) var(--spacing-3);
  z-index: 999;
}

.skip-link:focus {
  top: 0;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn--lg {
  padding: var(--spacing-3) var(--spacing-4);
  font-size: 16px;
}

.btn--sm {
  padding: 6px 12px;
  font-size: 14px;
}

.btn--red {
  background: var(--clr-primary);
  color: white;
  border-color: var(--clr-primary);
}

.btn--red:hover {
  background: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
}

.btn--outline {
  background: transparent;
  color: white;
  border-color: white;
}

.btn--outline:hover {
  background: rgba(255,255,255,0.1);
}

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

.btn--white:hover {
  background: #f5f5f5;
}

/* ============ HEADER ============ */
.header {
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-3) 0;
}

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--clr-text);
}

.logo__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--clr-primary);
  color: white;
  border-radius: var(--radius);
}

.logo--light {
  color: white;
}

.logo--light .logo__icon {
  background: rgba(255,255,255,0.2);
}

.nav {
  display: flex;
  gap: var(--spacing-4);
  margin-left: auto;
}

.nav a {
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

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

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .header__inner {
    gap: var(--spacing-2);
  }
}

/* ============ HERO ============ */
.hero {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  color: white;
  padding: clamp(60px, 10vw, 100px) 0;
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6);
  align-items: center;
}

.hero__content h1 {
  color: white;
  margin-bottom: var(--spacing-3);
  line-height: 1.1;
}

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

.label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: var(--spacing-3);
}

.lede {
  font-size: 18px;
  line-height: 1.6;
  color: #ccc;
  margin-bottom: var(--spacing-4);
  max-width: 500px;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.hero__trust {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  padding-top: var(--spacing-4);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 14px;
  color: #ccc;
}

.hero__trust li::before {
  content: '✓ ';
  color: var(--clr-primary);
  font-weight: 700;
  margin-right: var(--spacing-1);
}

.hero__image {
  width: 100%;
  height: 400px;
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }
  .hero__image {
    height: 300px;
  }
}

@media (max-width: 640px) {
  .hero__cta {
    flex-direction: column;
  }
  .btn--lg {
    width: 100%;
  }
}

/* ============ STATS ============ */
.stats {
  background: var(--clr-surface);
  padding: var(--spacing-6) 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-4);
}

.stat {
  text-align: center;
}

.stat__num {
  font-family: var(--font-display);
  font-size: 40px;
  color: var(--clr-primary);
  margin-bottom: var(--spacing-1);
}

.stat__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 900px) {
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .stats {
    padding: var(--spacing-4) 0;
  }
  .stat__num {
    font-size: 28px;
  }
}

/* ============ SERVICES ============ */
.services {
  padding: var(--spacing-7) 0;
}

.services h2 {
  margin-bottom: var(--spacing-6);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-4);
}

.service-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  background: var(--clr-bg);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__image {
  width: 100%;
  height: 250px;
  background-size: cover;
  background-position: center;
}

.service-card__content {
  padding: var(--spacing-4);
  flex: 1;
}

.service-card h3 {
  margin-bottom: var(--spacing-2);
}

.service-card p {
  font-size: 15px;
  color: var(--clr-text-secondary);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .services__grid {
    grid-template-columns: 1fr;
  }
  .service-card__image {
    height: 200px;
  }
}

/* ============ BANNER ============ */
.banner {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  color: white;
  padding: var(--spacing-6) 0;
  text-align: center;
}

.banner__inner {
  max-width: 600px;
  margin: 0 auto;
}

.banner h2 {
  color: white;
  margin-bottom: var(--spacing-2);
}

.banner p {
  font-size: 18px;
  margin-bottom: var(--spacing-4);
  color: rgba(255,255,255,0.95);
}

/* ============ PROCESS ============ */
.process {
  padding: var(--spacing-7) 0;
}

.process h2 {
  margin-bottom: var(--spacing-6);
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-4);
}

.process__step {
  padding: var(--spacing-4);
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--clr-primary);
}

.process__num {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--clr-primary);
  margin-bottom: var(--spacing-2);
}

.process__step h3 {
  margin-bottom: var(--spacing-1);
}

.process__step p {
  font-size: 15px;
  color: var(--clr-text-secondary);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 1024px) {
  .process__steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .process__steps {
    grid-template-columns: 1fr;
  }
}

/* ============ WORK ============ */
.work {
  background: var(--clr-surface);
  padding: var(--spacing-6) 0 var(--spacing-7);
}

.work h2 {
  margin-bottom: var(--spacing-2);
}

.subtitle {
  font-size: 16px;
  color: var(--clr-text-secondary);
  margin-bottom: var(--spacing-6);
}

/* ============ FAQ ============ */
.faq {
  padding: var(--spacing-7) 0;
}

.faq h2 {
  margin-bottom: var(--spacing-6);
}

.faq__wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.faq__item {
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--clr-surface);
  border-radius: var(--radius);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
}

.faq__item:hover {
  border-color: var(--clr-primary);
  background: white;
  box-shadow: var(--shadow-md);
}

.faq__item summary {
  font-weight: 600;
  user-select: none;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq__item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--clr-primary);
  font-weight: 300;
}

.faq__item[open] summary::after {
  content: '−';
}

.faq__item p {
  margin-top: var(--spacing-3);
  font-size: 15px;
  color: var(--clr-text-secondary);
  line-height: 1.6;
}

/* ============ ESTIMATE ============ */
.estimate {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  color: white;
  padding: var(--spacing-7) 0;
}

.estimate__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6);
  align-items: start;
}

.estimate h2 {
  color: white;
  margin-bottom: var(--spacing-3);
}

.estimate p {
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--spacing-4);
}

.bigtel {
  display: inline-block;
  margin-top: var(--spacing-4);
}

.bigtel__label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  margin-bottom: var(--spacing-1);
}

.bigtel__num {
  display: block;
  font-family: var(--font-display);
  font-size: 32px;
  color: white;
}

/* FORM */
.estimate__form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.form-field label {
  font-weight: 600;
  font-size: 14px;
  color: white;
}

.opt {
  font-weight: 400;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: var(--spacing-2) var(--spacing-3);
  font-family: var(--font-body);
  font-size: 15px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.05);
  color: white;
  transition: all var(--transition);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(255,255,255,0.4);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--clr-primary);
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.form-note {
  font-size: 13px;
  text-align: center;
  color: rgba(255,255,255,0.7);
}

@media (max-width: 1024px) {
  .estimate__grid {
    grid-template-columns: 1fr;
  }
}

/* ============ FOOTER ============ */
.footer {
  background: #0a0a0a;
  color: #999;
  padding: var(--spacing-6) 0 var(--spacing-3);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-6);
}

.footer__brand p {
  font-size: 14px;
  line-height: 1.6;
  margin-top: var(--spacing-2);
}

.footer__col h4 {
  color: white;
  margin-bottom: var(--spacing-2);
  font-size: 14px;
}

.footer__col a {
  display: block;
  font-size: 14px;
  color: #999;
  padding: 6px 0;
}

.footer__col a:hover {
  color: var(--clr-primary);
}

.footer__tel {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  color: white !important;
  margin-bottom: var(--spacing-2);
}

.footer__contact p {
  font-size: 14px;
  margin-bottom: var(--spacing-2);
  color: #999;
}

.footer__base {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: var(--spacing-3);
  text-align: center;
  font-size: 13px;
  color: #666;
}

@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
  }
}

@media (max-width: 640px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ============ MOBILE CALL BAR ============ */
.call-bar {
  display: none;
}

@media (max-width: 768px) {
  .call-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 90;
    border-top: 1px solid var(--clr-border);
    background: white;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.08);
  }

  .call-bar a {
    padding: var(--spacing-3);
    text-align: center;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--clr-border);
  }

  .call-bar a:last-child {
    border-right: none;
  }

  .call-bar__phone {
    background: var(--clr-primary);
    color: white;
  }

  .call-bar__estimate {
    color: var(--clr-primary);
  }

  body {
    padding-bottom: 56px;
  }
}

/* ============ FLOATING CALL BUTTON ============ */
.float-call {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background: var(--clr-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  z-index: 80;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  font-size: 24px;
}

.float-call:hover {
  background: var(--clr-primary-dark);
  transform: scale(1.1);
  box-shadow: 0 12px 32px rgba(196, 30, 58, 0.3);
}

.float-call__text {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .float-call {
    width: 56px;
    height: 56px;
    bottom: 80px;
    font-size: 20px;
  }
}

@media (max-width: 480px) {
  .float-call {
    width: 56px;
    height: 56px;
    bottom: 76px;
  }
}

/* ============ RESPONSIVE IMAGES ============ */
@supports (content-visibility: auto) {
  .service-card__image,
  .hero__image {
    content-visibility: auto;
  }
}