/* ========================================
   SMT Construction - Main Stylesheet
   ======================================== */

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

:root {
  --color-bg: #0a0a0a;
  --color-bg-alt: #111111;
  --color-bg-card: #1a1a1a;
  --color-bg-card-hover: #222222;
  --color-text: #ffffff;
  --color-text-muted: #999999;
  --color-text-subtle: #666666;
  --color-accent: #c8a45e;
  --color-accent-light: #dbb96e;
  --color-accent-dark: #a8863e;
  --color-border: #2a2a2a;
  --color-border-light: #333333;

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;

  --container-max: 1200px;
  --section-padding: 120px;
  --header-height: 80px;

  --transition: 0.3s ease;
  --transition-slow: 0.6s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Typography --- */
.text-accent {
  color: var(--color-accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn--primary:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-2px);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--full {
  width: 100%;
}

/* ========================================
   Header / Navigation
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: all var(--transition);
}

.header--scrolled {
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.logo-smt {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.logo-construction {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  padding: 4px 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg);
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 10, 10, 0.95) 0%,
    rgba(10, 10, 10, 0.7) 50%,
    rgba(10, 10, 10, 0.85) 100%
  );
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(200, 164, 94, 0.08) 0%, transparent 70%);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-top: calc(var(--header-height) + 60px);
}

.hero__subtitle {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--color-text);
}

.hero__desc {
  font-size: 1.15rem;
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 500px;
  margin-bottom: 48px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero__scroll span {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ========================================
   Section Common
   ======================================== */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section__header {
  margin-bottom: 64px;
}

.section__header--center {
  text-align: center;
}

.section__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding: 6px 16px;
  border: 1px solid var(--color-accent-dark);
  border-radius: 2px;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

.section__subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-top: 16px;
  line-height: 1.7;
}

.section__header--center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   About
   ======================================== */
.about {
  background-color: var(--color-bg);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__lead {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

.about__features {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.about__feature {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.about__feature-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-light);
  border-radius: 2px;
  color: var(--color-accent);
}

.about__feature-icon svg {
  width: 20px;
  height: 20px;
}

.about__feature h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text);
}

.about__feature p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
}

.about__visual {
  position: relative;
}

.about__image-placeholder {
  width: 100%;
  aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-alt) 100%);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.about__image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 40px,
    rgba(200, 164, 94, 0.03) 40px,
    rgba(200, 164, 94, 0.03) 80px
  );
}

.about__image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px;
  background: linear-gradient(to top, rgba(10, 10, 10, 0.9), transparent);
  text-align: center;
}

.about__stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.about__stat-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ========================================
   Pillars
   ======================================== */
.pillars {
  background-color: var(--color-bg-alt);
}

.pillars__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.pillar {
  padding: 48px 36px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.pillar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-slow);
}

.pillar:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
}

.pillar:hover::before {
  transform: scaleX(1);
}

.pillar__number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-border);
  margin-bottom: 24px;
  line-height: 1;
}

.pillar__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.pillar__icon svg {
  width: 100%;
  height: 100%;
}

.pillar__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.pillar__desc {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.pillar__line {
  width: 40px;
  height: 1px;
  background-color: var(--color-accent-dark);
  margin-top: 28px;
}

/* ========================================
   Services
   ======================================== */
.services {
  background-color: var(--color-bg);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  padding: 48px 32px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent-dark);
  background-color: var(--color-bg-card-hover);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 28px;
}

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

.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.service-card__desc {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========================================
   Management
   ======================================== */
.management {
  background-color: var(--color-bg-alt);
}

.management__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.management__lead {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-top: 16px;
  margin-bottom: 40px;
}

.management__items {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.management__item {
  padding: 20px 24px;
  border-left: 2px solid var(--color-border);
  transition: border-color var(--transition);
}

.management__item:hover {
  border-left-color: var(--color-accent);
}

.management__item-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.management__item p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
}

.management__image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg) 100%);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.management__image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 60px,
    rgba(200, 164, 94, 0.03) 60px,
    rgba(200, 164, 94, 0.03) 120px
  );
}

/* ========================================
   Process
   ======================================== */
.process {
  background-color: var(--color-bg);
}

.process__timeline {
  display: flex;
  align-items: stretch;
  gap: 0;
  justify-content: center;
}

.process__step {
  flex: 1;
  max-width: 320px;
  padding: 40px 32px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  text-align: center;
}

.process__step-phase {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.process__step-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-text);
}

.process__step-list {
  text-align: left;
}

.process__step-list li {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  padding-left: 16px;
  position: relative;
}

.process__step-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  transform: translateY(-50%);
}

.process__step-list li:last-child {
  border-bottom: none;
}

.process__connector {
  display: flex;
  align-items: center;
  padding: 0 4px;
}

.process__connector::after {
  content: '';
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), var(--color-accent), var(--color-border));
}

/* ========================================
   Promise
   ======================================== */
.promise {
  background-color: var(--color-bg-alt);
}

.promise__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.promise__card {
  text-align: center;
  padding: 48px 32px;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-card);
  transition: all var(--transition);
}

.promise__card:hover {
  border-color: var(--color-accent-dark);
}

.promise__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  color: var(--color-accent);
}

.promise__icon svg {
  width: 100%;
  height: 100%;
}

.promise__card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.promise__card p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
}

/* ========================================
   Partners
   ======================================== */
.partners {
  background-color: var(--color-bg);
  padding-bottom: 80px;
}

.partners__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}

.partner-logo {
  padding: 24px 40px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.partner-logo:hover {
  border-color: var(--color-accent-dark);
}

.partner-logo span {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* ========================================
   Contact
   ======================================== */
.contact {
  background-color: var(--color-bg-alt);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact__lead {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-top: 16px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact__detail {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact__detail svg {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  margin-top: 4px;
}

.contact__detail strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  color: var(--color-text);
}

.contact__detail p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
}

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

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

/* Contact Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 16px 20px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 300;
  transition: border-color var(--transition);
  outline: none;
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: var(--color-text-subtle);
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-accent);
}

.form__group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background-color: var(--color-bg);
  padding: 80px 0 40px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.footer__brand p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-top: 16px;
  max-width: 280px;
}

.footer__links h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.footer__links li {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--color-text-muted);
  padding: 4px 0;
}

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

.footer__bottom {
  padding-top: 32px;
  text-align: center;
}

.footer__bottom p {
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-subtle);
}

/* ========================================
   Animations
   ======================================== */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.animate-fade-up:nth-child(1) { animation-delay: 0.1s; }
.animate-fade-up:nth-child(2) { animation-delay: 0.3s; }
.animate-fade-up:nth-child(3) { animation-delay: 0.5s; }
.animate-fade-up:nth-child(4) { animation-delay: 0.7s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .about__grid,
  .management__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .pillars__grid,
  .services__grid,
  .promise__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
    --header-height: 64px;
  }

  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--transition-slow);
    z-index: 1000;
  }

  .nav.open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .nav__link {
    font-size: 1.2rem;
  }

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

  .process__timeline {
    flex-direction: column;
    align-items: center;
  }

  .process__step {
    max-width: 100%;
    width: 100%;
  }

  .process__connector {
    padding: 4px 0;
  }

  .process__connector::after {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--color-border), var(--color-accent), var(--color-border));
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3.5rem);
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .partners__logos {
    gap: 24px;
  }

  .partner-logo {
    padding: 16px 24px;
  }

  .hero__scroll {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}