/* ============================================================
   TSM Metalworks — Main Stylesheet
   Stack: Static HTML/CSS, Cloudflare Pages, GitHub source
   ============================================================ */

/* ------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ------------------------------------------------------------ */
:root {
  /* Brand Colors — dark steel, not pure black */
  --color-black:        #0d0f12;
  --color-dark:         #161a20;
  --color-dark-mid:     #1e232b;
  --color-mid:          #252c36;
  --color-border:       #34404f;
  --color-text-muted:   #7a8899;
  --color-text-body:    #b8c4d0;
  --color-text-heading: #e8edf2;
  --color-white:        #ffffff;

  /* Accent — TSM amber-gold from laser spark (#f5ba0f) */
  --color-accent:       #f5ba0f;
  --color-accent-dark:  #d49e0a;
  --color-accent-light: #fcd45a;
  --color-accent-dim:   rgba(245, 186, 15, 0.10);

  /* Typography */
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Barlow Condensed', var(--font-sans);

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 10rem;

  /* Layout */
  --max-width:      1200px;
  --nav-height:     70px;
  --section-pad:    5rem;
  --border-radius:  4px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-med:  250ms ease;
}

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

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

body {
  background-color: var(--color-dark);
  color: var(--color-text-body);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ------------------------------------------------------------
   3. Typography
   ------------------------------------------------------------ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-text-heading);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 600; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }

p {
  margin-bottom: 1rem;
  color: var(--color-text-body);
}

p:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------
   4. Layout Utilities
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--section-pad) 0;
}

.section--dark {
  background-color: var(--color-dark);
}

.section--darker {
  background-color: var(--color-black);
}

.section--mid {
  background-color: var(--color-dark-mid);
}

.section__header {
  margin-bottom: var(--space-lg);
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.section__title {
  margin-bottom: var(--space-sm);
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
}

.divider {
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin: var(--space-sm) 0;
}

/* ------------------------------------------------------------
   5. Navigation
   ------------------------------------------------------------ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(13, 15, 18, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(52, 64, 79, 0.6);
  transition: background var(--transition-med), border-color var(--transition-med), box-shadow var(--transition-med);
}

.nav--scrolled {
  background: rgba(13, 15, 18, 0.97);
  border-bottom-color: var(--color-accent);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo img {
  height: 46px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.03em;
}

.nav__logo-text span {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav__links a {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-body);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-med);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-white);
}

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

.nav__cta {
  background: var(--color-accent);
  color: var(--color-black) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--border-radius);
  font-weight: 700 !important;
  transition: background var(--transition-fast) !important;
}

.nav__cta::after {
  display: none !important;
}

.nav__cta:hover {
  background: var(--color-accent-light) !important;
  color: var(--color-black) !important;
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-heading);
  transition: transform var(--transition-med), opacity var(--transition-fast);
}

.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

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

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  transform: scale(1.03);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(13,15,18,0.55) 0%,
    rgba(13,15,18,0.40) 40%,
    rgba(13,15,18,0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  max-width: 820px;
}

.hero__eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.hero__title {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-body);
  margin-bottom: var(--space-md);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
  cursor: pointer;
}

.hero__scroll svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-text-muted);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ------------------------------------------------------------
   7. Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.8rem 1.75rem;
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: var(--color-black);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}

.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
  color: var(--color-white);
}

/* ------------------------------------------------------------
   8. Capabilities Bar (stats strip)
   ------------------------------------------------------------ */
.capabilities {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 2rem 0;
}

.capabilities__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  text-align: center;
}

/* Vertical dividers between stats */
.capabilities__grid > div + div {
  border-left: 1px solid var(--color-border);
}

.capability__number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.capability__label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------
   9. Services Section
   ------------------------------------------------------------ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--color-mid);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition-med), border-color var(--transition-med), box-shadow var(--transition-med);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  border-top-color: var(--color-accent);
  box-shadow: 0 12px 32px rgba(0,0,0,0.35), 0 0 0 1px var(--color-accent-dim);
}

.service-card__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--color-dark-mid);
}

.service-card__body {
  padding: 1.75rem;
}

.service-card__title {
  margin-bottom: 0.75rem;
  color: var(--color-text-heading);
}

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

.service-card__specs {
  list-style: none;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.service-card__specs li {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
  display: flex;
  gap: 0.5rem;
}

.service-card__specs li::before {
  content: '—';
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   10. About Section
   ------------------------------------------------------------ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about__image-wrap {
  position: relative;
}

.about__image,
.about__map {
  width: 100%;
  height: 480px;
  border-radius: var(--border-radius);
  background: var(--color-mid);
  display: block;
}

.about__image {
  object-fit: cover;
}

.about__map {
  border: none;
  filter: grayscale(30%) brightness(0.9);
}

.about__image-badge {
  position: absolute;
  bottom: -1.5rem;
  right: -1.5rem;
  background: var(--color-accent);
  padding: 1.25rem 1.5rem;
  border-radius: var(--border-radius);
  text-align: center;
}

.about__image-badge .number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1;
}

.about__image-badge .label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.65);
}

.about__content {
  padding-left: var(--space-sm);
}

.about__text {
  font-size: 1.05rem;
  color: var(--color-text-body);
  margin-bottom: 1.25rem;
}

.about__highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: var(--space-md);
}

.highlight {
  background: linear-gradient(135deg, var(--color-mid) 0%, var(--color-dark-mid) 100%);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.highlight__title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.3rem;
}

.highlight__value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

/* ------------------------------------------------------------
   11. Contact Section
   ------------------------------------------------------------ */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact__block h4 {
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.contact__block p,
.contact__block a {
  font-size: 0.95rem;
  color: var(--color-text-body);
  display: block;
  margin-bottom: 0.25rem;
}

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

.contact__block .address-line {
  line-height: 1.8;
}

/* Contact CTA */
.contact__cta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-md);
  background: linear-gradient(145deg, var(--color-mid) 0%, var(--color-dark-mid) 100%);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--border-radius);
  padding: var(--space-lg) var(--space-md);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}

.contact__cta-text {
  font-size: 1rem;
  color: var(--color-text-body);
  margin: 0;
}

.contact__email-btn {
  align-self: flex-start;
  font-size: 0.95rem;
  padding: 1rem 2rem;
}

.contact__email-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact__cta-alt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.contact__cta-alt a {
  color: var(--color-text-body);
  font-weight: 600;
}

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

/* Image placeholders — shown when photo files are missing */
.service-card__image,
.about__image {
  background-color: var(--color-mid);
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 10px,
    rgba(245, 186, 15, 0.04) 10px,
    rgba(245, 186, 15, 0.04) 20px
  );
}

/* ------------------------------------------------------------
   12. Footer
   ------------------------------------------------------------ */
.footer {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0 var(--space-md);
}

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

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

.footer__logo {
  height: 44px;
  width: auto;
  margin-bottom: var(--space-sm);
}

.footer__logo-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer__logo-text span {
  color: var(--color-accent);
}

.footer__heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__links a {
  font-size: 0.9rem;
  color: var(--color-text-body);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

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

.footer__legal {
  display: flex;
  gap: var(--space-md);
}

.footer__legal a {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

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

/* ------------------------------------------------------------
   13. Legal Pages
   ------------------------------------------------------------ */
.legal-page {
  padding-top: calc(var(--nav-height) + var(--space-lg));
  padding-bottom: var(--space-xl);
  min-height: 80vh;
}

.legal-page__header {
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-md);
}

.legal-content {
  max-width: 780px;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-heading);
}

.legal-content h3 {
  font-size: 1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}

.legal-content p {
  font-size: 0.93rem;
  color: var(--color-text-body);
  margin-bottom: 1rem;
}

.legal-content ul {
  margin: 0.5rem 0 1rem 1.5rem;
}

.legal-content li {
  font-size: 0.93rem;
  color: var(--color-text-body);
  margin-bottom: 0.4rem;
}

/* ------------------------------------------------------------
   14. Responsive
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .about__grid {
    gap: var(--space-lg);
  }

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

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 3.5rem;
    --nav-height: 64px;
  }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-black);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__links a {
    font-size: 1.1rem;
  }

  .nav__toggle {
    display: flex;
  }

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

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

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

  .about__image-wrap {
    margin-bottom: 2rem;
  }

  .about__image-badge {
    right: 1rem;
    bottom: 1rem;
  }

  .about__content {
    padding-left: 0;
  }

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

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

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

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

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

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