/* =========================================================
   PT. TOPSCO STEEL UTAMA — Design tokens
   ========================================================= */
:root {
  --color-bg: #1B1D1F;
  --color-panel: #232628;
  --color-panel-light: #2D3134;
  --color-line: #3A3F42;
  --color-steel-blue: #5C88A6;
  --color-safety-orange: #E8590C;
  --color-off-white: #EDEBE6;
  --color-muted: #9BA1A6;

  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;

  --cut-angle: 2.2deg;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-off-white);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.3px;
  line-height: 1.15;
}

p { max-width: 62ch; color: var(--color-muted); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* =========================================================
   Diagonal cut divider — signature motif representing
   the plate/coil cutting process
   ========================================================= */
.cut-divider {
  position: relative;
  height: 64px;
  background: var(--color-bg);
}
.cut-divider svg { width: 100%; height: 100%; display: block; }

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(27, 29, 31, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.brand span.mark {
  color: var(--color-safety-orange);
  font-size: 1.4rem;
}
.brand-plate {
  display: inline-flex;
  align-items: center;
}
.brand-plate img {
  height: 34px;
  width: auto;
  display: block;
}
.footer-row .brand-plate img { height: 30px; }
.nav-links {
  display: flex;
  gap: 32px;
  font-size: 0.95rem;
}
.nav-links a {
  position: relative;
  padding: 4px 0;
  color: var(--color-off-white);
}
.nav-links a:hover { color: var(--color-safety-orange); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  color: var(--color-off-white);
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
}

@media (max-width: 780px) {
  .nav-links {
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--color-panel);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open { max-height: 400px; }
  .nav-links a { padding: 16px 24px; border-top: 1px solid var(--color-line); }
  .nav-toggle { display: block; }
}

/* =========================================================
   Hero + Carousel
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 76px;
}

.carousel {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.carousel-track {
  position: absolute;
  inset: 0;
}
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.carousel-slide.active { opacity: 1; }
.carousel-slide img {
  width: 100%; height: 100%; object-fit: cover;
}
.carousel-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15,16,17,0.92) 20%, rgba(15,16,17,0.55) 55%, rgba(15,16,17,0.75) 100%);
}
.carousel-dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}
.carousel-dots button {
  width: 28px; height: 3px;
  background: rgba(237,235,230,0.35);
  border: none;
  cursor: pointer;
  padding: 0;
}
.carousel-dots button.active { background: var(--color-safety-orange); }

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.hero-eyebrow {
  color: var(--color-safety-orange);
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  color: var(--color-off-white);
  margin-bottom: 20px;
}
.hero p {
  font-size: 1.05rem;
  color: #C7CBCE;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.4px;
  padding: 14px 30px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--color-safety-orange);
  color: #1B1D1F;
}
.btn-primary:hover { background: #ff6b19; transform: translateY(-1px); }
.btn-outline {
  border-color: var(--color-off-white);
  color: var(--color-off-white);
  background: transparent;
}
.btn-outline:hover { border-color: var(--color-safety-orange); color: var(--color-safety-orange); }

/* =========================================================
   Section base
   ========================================================= */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt { background: var(--color-panel); }
.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}
.section-head .kicker {
  color: var(--color-safety-orange);
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 1px;
  margin-bottom: 10px;
  display: block;
}
.section-head h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); color: var(--color-off-white); }

/* =========================================================
   About
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.stat {
  background: var(--color-panel);
  padding: 28px 24px;
}
.stat .num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--color-safety-orange);
}
.stat .label { color: var(--color-muted); font-size: 0.9rem; margin-top: 4px; }

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Services
   ========================================================= */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.service-card {
  background: var(--color-bg);
  padding: 48px 40px;
  position: relative;
}
.service-card .idx {
  font-family: var(--font-display);
  color: var(--color-steel-blue);
  font-size: 0.85rem;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 1.5rem;
  color: var(--color-off-white);
  margin-bottom: 14px;
}
.service-card ul {
  list-style: none;
  margin-top: 20px;
  color: var(--color-muted);
  font-size: 0.92rem;
}
.service-card li {
  padding: 8px 0;
  border-top: 1px solid var(--color-line);
}
.service-card li:first-child { border-top: none; }

@media (max-width: 860px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Gallery carousel (facility photos)
   ========================================================= */
.gallery-carousel {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
}
.gallery-carousel::-webkit-scrollbar { height: 6px; }
.gallery-carousel::-webkit-scrollbar-thumb { background: var(--color-line); }
.gallery-item {
  flex: 0 0 320px;
  scroll-snap-align: start;
  aspect-ratio: 4/3;
  overflow: hidden;
  border: 1px solid var(--color-line);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }

/* =========================================================
   Reviews / Customer Satisfaction
   ========================================================= */
.rating-summary {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.rating-score {
  font-family: var(--font-display);
  font-size: 3.4rem;
  color: var(--color-safety-orange);
}
.rating-stars { color: var(--color-safety-orange); font-size: 1.2rem; letter-spacing: 3px; }
.rating-count { color: var(--color-muted); font-size: 0.9rem; margin-top: 4px; }

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 64px;
}
.review-card {
  background: var(--color-panel-light);
  border: 1px solid var(--color-line);
  padding: 28px;
}
.review-card .stars { color: var(--color-safety-orange); letter-spacing: 2px; margin-bottom: 12px; }
.review-card p { color: var(--color-off-white); font-size: 0.95rem; margin-bottom: 16px; }
.review-card .who {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  padding-top: 14px;
}

.review-empty {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 64px;
}

/* Forms (review + complaint) */
.form-panel {
  background: var(--color-panel-light);
  border: 1px solid var(--color-line);
  padding: 40px;
  max-width: 620px;
}
.form-panel h3 {
  font-size: 1.3rem;
  color: var(--color-off-white);
  margin-bottom: 24px;
}
.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 8px;
}
.field input,
.field textarea {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  color: var(--color-off-white);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-safety-orange);
}
.field textarea { resize: vertical; min-height: 110px; }

.star-input { display: flex; gap: 6px; }
.star-input button {
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--color-line);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s ease;
}
.star-input button.selected,
.star-input button:hover,
.star-input button:hover ~ button { color: var(--color-safety-orange); }

.honeypot-field { position: absolute; left: -9999px; opacity: 0; }

.form-message {
  padding: 14px 18px;
  margin-bottom: 24px;
  font-size: 0.9rem;
  border-left: 3px solid var(--color-safety-orange);
  background: var(--color-panel-light);
  transition: opacity 0.5s ease;
}
.form-message.fade-out { opacity: 0; }
.form-message.success { border-color: #5CA35C; }
.form-message.error { border-color: #C64B4B; }

.split-forms {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
@media (max-width: 900px) {
  .split-forms { grid-template-columns: 1fr; }
}

/* =========================================================
   Contact
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-list { list-style: none; margin-top: 8px; }
.contact-list li {
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
  display: flex;
  gap: 16px;
}
.contact-list li:last-child { border-bottom: 1px solid var(--color-line); }
.contact-list .label {
  font-family: var(--font-display);
  color: var(--color-steel-blue);
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  min-width: 90px;
}
.contact-list .value { color: var(--color-off-white); }
.map-frame {
  width: 100%;
  height: 100%;
  min-height: 340px;
  border: 1px solid var(--color-line);
  filter: grayscale(0.3) contrast(1.05);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--color-panel);
  border-top: 1px solid var(--color-line);
  padding: 40px 0;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-row .brand { font-size: 1.05rem; }
.footer-meta { color: var(--color-muted); font-size: 0.85rem; }