/* ═══════════════════════════════════════════════════════════
   TERLINGUA RESOURCES — Production Stylesheet v1.0
   Brand Design Tokens + Full Page Styles
═══════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root {
  /* Primary Navy Family */
  --tr-navy:        #0D2340;
  --tr-navy-mid:    #1A3A5C;
  --tr-navy-light:  #2B5080;

  /* Gold / Accent Family */
  --tr-gold:        #C49A3C;
  --tr-gold-light:  #D4AF6A;
  --tr-gold-pale:   #F0E0B0;
  --tr-gold-dark:   #A07C20;

  /* Silver / Metallic */
  --tr-silver:      #9EAABB;
  --tr-silver-dark: #6B7F91;

  /* Neutrals */
  --tr-white:       #FFFFFF;
  --tr-off-white:   #F5F7FA;
  --tr-fog:         #E8EDF3;
  --tr-charcoal:    #1C2B3A;
  --tr-slate:       #4A5A6B;
  --tr-stone:       #8A96A3;

  /* Semantic */
  --tr-success:     #2E7D52;

  /* Typography */
  --font-display:   'Barlow Condensed', 'Trade Gothic', sans-serif;
  --font-body:      'Lora', Georgia, serif;
  --font-mono:      'IBM Plex Mono', monospace;

  /* Shadows */
  --shadow-sm:  0 1px 4px rgba(13, 35, 64, 0.10);
  --shadow-md:  0 4px 16px rgba(13, 35, 64, 0.15);
  --shadow-lg:  0 8px 32px rgba(13, 35, 64, 0.20);

  /* Border Radii */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;

  /* Layout */
  --max-width: 1100px;
  --section-pad: 5rem 4rem;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--tr-off-white);
  color: var(--tr-charcoal);
  line-height: 1.7;
}

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

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

/* ── ACCESSIBILITY: Skip Link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--tr-gold);
  color: var(--tr-navy);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 1rem;
}

/* ── FOCUS RING ── */
:focus-visible {
  outline: 2px solid var(--tr-gold);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ════════════════════════════════════════════════════════
   TOP BAR
════════════════════════════════════════════════════════ */
.topbar {
  background: var(--tr-charcoal);
  padding: 0.4rem 3rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 1.25rem;
  border-bottom: 1px solid rgba(196, 154, 60, 0.15);
}

.topbar a,
.topbar span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--tr-silver-dark);
  transition: color 0.2s;
}

.topbar a:hover {
  color: var(--tr-gold);
}

.topbar-sep {
  color: rgba(158, 170, 187, 0.3);
}

/* ════════════════════════════════════════════════════════
   NAVIGATION
════════════════════════════════════════════════════════ */
.site-nav {
  background: var(--tr-navy);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 3rem;
  height: 68px;
  gap: 2rem;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--tr-white);
}

.nav-logo-text em {
  font-style: normal;
  color: var(--tr-gold);
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tr-silver);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: var(--tr-gold-light);
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--tr-gold);
  color: var(--tr-navy);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--tr-gold-light);
}

/* Mobile hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  margin-left: auto;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--tr-silver);
  border-radius: 2px;
  transition: all 0.25s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ════════════════════════════════════════════════════════
   HERO — Background Slideshow
════════════════════════════════════════════════════════ */

/*
 * Layer order (bottom → top):
 *   1. .hero                – base navy fallback colour
 *   2. .hero-bg-layer       – photo layers (cross-fade here)
 *   3. .hero-overlay        – dark gradient for text legibility
 *   4. .hero-inner          – content
 */

.hero {
  /* Navy fallback shown while first image loads */
  background: var(--tr-navy);
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 6rem 4rem 5rem;
  position: relative;
  overflow: hidden;
}

/* ── Photo background container ── */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Both photo layers sit on top of each other */
.hero-bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  /* Start with the fallback navy until JS sets the first image */
  background-color: var(--tr-navy);
  transition: opacity 1.5s ease-in-out;
}

/* Current layer is fully visible; next layer starts hidden */
.hero-bg-current {
  opacity: 1;
  z-index: 1;
}

.hero-bg-next {
  opacity: 0;
  z-index: 2; /* sits above current so fading it IN reveals it */
}

/* ── Dark overlay for text legibility ── */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  /* Left-heavy gradient: deep navy left → semi-transparent right */
  background:
    linear-gradient(
      105deg,
      rgba(13, 35, 64, 0.82) 0%,
      rgba(13, 35, 64, 0.55) 50%,
      rgba(13, 35, 64, 0.30) 100%
    ),
    /* subtle gold highlight at top-right */
    radial-gradient(ellipse 35% 55% at 80% 35%, rgba(196, 154, 60, 0.10) 0%, transparent 65%);
  pointer-events: none;
}

/* ── Hero content sits above everything ── */
.hero-inner {
  max-width: 860px;
  position: relative;
  z-index: 4;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.0;
  color: var(--tr-white);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--tr-gold);
  display: block;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--tr-silver);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── Hero Buttons ── */
.btn-primary-lg {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--tr-gold);
  color: var(--tr-navy);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary-lg:hover {
  background: var(--tr-gold-light);
  transform: translateY(-2px);
}

.btn-ghost-lg {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--tr-white);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.83rem 1.75rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid rgba(158, 170, 187, 0.4);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ghost-lg:hover {
  border-color: var(--tr-gold);
  color: var(--tr-gold);
}

/* ════════════════════════════════════════════════════════
   STATS BAR
════════════════════════════════════════════════════════ */
.stats-bar {
  background: var(--tr-navy-mid);
  border-top: 1px solid rgba(196, 154, 60, 0.2);
  border-bottom: 1px solid rgba(196, 154, 60, 0.2);
  padding: 1.25rem 4rem;
  display: flex;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--tr-gold);
  display: block;
  line-height: 1;
  letter-spacing: 0.02em;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tr-silver);
  display: block;
  margin-top: 0.35rem;
}

/* ════════════════════════════════════════════════════════
   SECTION COMMONS
════════════════════════════════════════════════════════ */
.section {
  padding: var(--section-pad);
}

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

.section-light {
  background: var(--tr-off-white);
}

.section-white {
  background: var(--tr-white);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header-block {
  max-width: var(--max-width);
  margin: 0 auto 3rem;
}

/* Eyebrow label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tr-gold);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--tr-gold);
  flex-shrink: 0;
}

/* Section Titles */
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.section-title.light {
  color: var(--tr-white);
}

.section-title.dark {
  color: var(--tr-navy);
}

/* Body text */
.body-text {
  font-size: 1rem;
  line-height: 1.8;
  max-width: 640px;
  margin-top: 1rem;
}

.body-text.light {
  color: var(--tr-silver);
}

.body-text.dark {
  color: var(--tr-slate);
}

/* ════════════════════════════════════════════════════════
   VALUE PROPS
════════════════════════════════════════════════════════ */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.value-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(196, 154, 60, 0.2);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: background 0.2s, transform 0.2s;
}

.value-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-3px);
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--tr-gold), transparent);
}

.value-icon {
  width: 40px;
  height: 40px;
  background: rgba(196, 154, 60, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.2rem;
}

.value-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tr-white);
  margin-bottom: 0.6rem;
}

.value-card p {
  font-size: 0.88rem;
  color: var(--tr-silver);
  line-height: 1.7;
}

/* ════════════════════════════════════════════════════════
   ABOUT SPLIT
════════════════════════════════════════════════════════ */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.about-image {
  border-radius: var(--radius-lg);
  min-height: 420px;
  background: linear-gradient(135deg, var(--tr-navy-mid), var(--tr-navy-light));
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(196, 154, 60, 0.15);
}

.about-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 30% 40%, rgba(196, 154, 60, 0.12) 0%, transparent 60%),
    repeating-linear-gradient(45deg, transparent, transparent 30px, rgba(255, 255, 255, 0.02) 30px, rgba(255, 255, 255, 0.02) 31px);
}

.about-image-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
}

.about-image-overlay {
  position: relative;
  z-index: 1;
}

.about-image-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tr-gold);
  background: rgba(13, 35, 64, 0.7);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* ── About Slideshow ─────────────────────────────────── */

/* The two crossfade layers sit flush inside the container */
.asl-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: opacity 1.4s ease-in-out;
  border-radius: inherit;
}

.asl-layer--current {
  opacity: 1;
  z-index: 0;
}

.asl-layer--next {
  opacity: 0;
  z-index: 1;
}

/* Scrim gradient so the tag stays readable over photos */
.about-slideshow .about-image-inner {
  background: linear-gradient(
    to top,
    rgba(13, 35, 64, 0.60) 0%,
    rgba(13, 35, 64, 0.10) 40%,
    transparent 70%
  );
  z-index: 2;
}

/* Remove the decorative ::before pattern when real photos are present */
.about-slideshow::before {
  display: none;
}

/* Dot indicators */
.asl-dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.45rem;
  z-index: 3;
}

.asl-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  padding: 0;
  cursor: pointer;
  background: var(--tr-silver);
  opacity: 0.7;
  transition: background 0.3s ease, opacity 0.3s ease, transform 0.2s ease;
}

.asl-dot:hover {
  opacity: 1;
  transform: scale(1.25);
}

.asl-dot.is-active {
  background: var(--tr-gold);
  opacity: 1;
  transform: scale(1.15);
}

.asl-dot:focus-visible {
  outline: 2px solid var(--tr-gold-light);
  outline-offset: 3px;
}

/* ── /About Slideshow ────────────────────────────────── */

.about-content .section-title {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.about-content .body-text {
  margin-top: 0;
}

/* Mission Block */
.mission-block {
  background: rgba(196, 154, 60, 0.08);
  border-left: 3px solid var(--tr-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.mission-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tr-gold);
  margin-bottom: 0.5rem;
}

.mission-block p {
  font-style: italic;
  color: var(--tr-slate);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Expertise List */
.expertise-list {
  list-style: none;
  margin-top: 1.5rem;
}

.expertise-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--tr-fog);
  font-size: 0.9rem;
  color: var(--tr-slate);
}

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

.expertise-bullet {
  color: var(--tr-gold);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* ════════════════════════════════════════════════════════
   FOCUS AREAS
════════════════════════════════════════════════════════ */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.focus-card {
  background: var(--tr-white);
  border: 1px solid var(--tr-fog);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.focus-card-image {
  height: 180px;
  background: linear-gradient(135deg, var(--tr-navy) 0%, var(--tr-navy-mid) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.focus-card-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 70% 50%, rgba(196, 154, 60, 0.2) 0%, transparent 60%);
}

.focus-card-body {
  padding: 1.5rem;
}

.focus-card-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--tr-navy);
  margin-bottom: 0.6rem;
}

.focus-card-body p {
  font-size: 0.88rem;
  color: var(--tr-slate);
  line-height: 1.7;
}

.focus-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(196, 154, 60, 0.12);
  color: #7A5A10;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-top: 0.75rem;
}

/* ════════════════════════════════════════════════════════
   GEOGRAPHY
════════════════════════════════════════════════════════ */
.geo-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.geo-intro {
  max-width: 680px;
  margin-bottom: 2.5rem;
}

/* Tab Navigation */
.geo-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(158, 170, 187, 0.2);
  padding-bottom: 0;
}

.tab-btn {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--tr-silver-dark);
  border: none;
  padding: 0.6rem 1rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  position: relative;
  bottom: -1px;
}

.tab-btn:hover {
  color: var(--tr-silver);
}

.tab-btn.active {
  color: var(--tr-gold);
  border-bottom-color: var(--tr-gold);
}

/* Basin Panels */
.basin-panel {
  display: none;
}

.basin-panel.active {
  display: block;
}

.basin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1rem;
}

/* Basin Cards */
.basin-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(158, 170, 187, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  transition: background 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
}

.basin-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--tr-gold), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}

.basin-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(196, 154, 60, 0.25);
}

.basin-card:hover::before {
  opacity: 1;
}

.basin-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.basin-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tr-gold);
  margin-bottom: 0.3rem;
}

.basin-title {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--tr-white);
  line-height: 1.2;
}

.basin-card > p {
  font-size: 0.82rem;
  color: var(--tr-silver);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

/* Geo Badges */
.geo-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: rgba(196, 154, 60, 0.2);
  color: var(--tr-gold-light);
  flex-shrink: 0;
  white-space: nowrap;
}

.geo-badge.badge-eval {
  background: rgba(158, 170, 187, 0.15);
  color: var(--tr-silver-dark);
}

.geo-badge.badge-active {
  background: rgba(46, 125, 82, 0.2);
  color: #7ECBA0;
}

/* Basin Tags */
.basin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.basin-tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: rgba(158, 170, 187, 0.1);
  color: var(--tr-silver-dark);
}

.basin-tag.tag-primary {
  background: rgba(196, 154, 60, 0.18);
  color: var(--tr-gold-light);
}

.basin-tag.tag-oil {
  background: rgba(196, 154, 60, 0.18);
  color: var(--tr-gold-light);
}

.basin-tag.tag-gas {
  background: rgba(43, 80, 128, 0.25);
  color: #7EAACC;
}

/* ════════════════════════════════════════════════════════
   CTA BANNER
════════════════════════════════════════════════════════ */
.cta-banner {
  background: linear-gradient(135deg, var(--tr-gold) 0%, var(--tr-gold-dark) 100%);
  padding: 4rem;
  text-align: center;
}

.cta-banner-inner {
  max-width: 700px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--tr-navy);
  margin-bottom: 0.75rem;
}

.cta-banner p {
  font-size: 1rem;
  color: rgba(13, 35, 64, 0.72);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-cta-dark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--tr-navy);
  color: var(--tr-white);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.btn-cta-dark:hover {
  background: var(--tr-navy-mid);
}

.btn-cta-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--tr-navy);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.88rem 2rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--tr-navy);
  transition: all 0.2s;
}

.btn-cta-outline:hover {
  background: var(--tr-navy);
  color: var(--tr-white);
}

/* ════════════════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-info .eyebrow {
  margin-bottom: 0.4rem;
}

.contact-heading {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--tr-white);
  margin-bottom: 0.6rem;
}

.contact-info > p {
  font-size: 0.9rem;
  color: var(--tr-silver);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.contact-details {
  list-style: none;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(158, 170, 187, 0.15);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--tr-silver);
}

.contact-detail:last-child {
  border-bottom: none;
}

.contact-detail a {
  color: var(--tr-silver);
  transition: color 0.2s;
}

.contact-detail a:hover {
  color: var(--tr-gold);
}

.contact-icon {
  color: var(--tr-gold);
  font-size: 0.9rem;
  width: 20px;
  flex-shrink: 0;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Hidden honeypot */
.form-honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
  tab-index: -1;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tr-silver-dark);
}

.form-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(158, 170, 187, 0.25);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--tr-white);
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus {
  border-color: var(--tr-gold);
  background: rgba(255, 255, 255, 0.08);
}

.form-input::placeholder {
  color: var(--tr-silver-dark);
}

/* Style <select> option text on dark bg */
.form-input option {
  background: var(--tr-navy-mid);
  color: var(--tr-white);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

.btn-form-submit {
  background: var(--tr-gold);
  color: var(--tr-navy);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  align-self: flex-start;
  transition: background 0.2s, transform 0.15s;
}

.btn-form-submit:hover {
  background: var(--tr-gold-light);
  transform: translateY(-1px);
}

.form-success {
  background: rgba(46, 125, 82, 0.15);
  border: 1px solid rgba(46, 125, 82, 0.3);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: #7ECBA0;
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--tr-charcoal);
  padding: 3rem 4rem 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(158, 170, 187, 0.15);
  margin-bottom: 1.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--tr-white);
  margin-bottom: 0.75rem;
}

.footer-logo em {
  font-style: normal;
  color: var(--tr-gold);
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--tr-silver-dark);
  line-height: 1.7;
  max-width: 260px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tr-silver);
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-links a {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tr-silver-dark);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--tr-gold);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--tr-stone);
}

.footer-bottom em {
  font-style: normal;
  color: var(--tr-gold);
}

/* ════════════════════════════════════════════════════════
   RESPONSIVE — Tablet & Mobile
════════════════════════════════════════════════════════ */
@media (max-width: 960px) {
  :root {
    --section-pad: 4rem 2.5rem;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 3rem 1.5rem;
  }

  /* Topbar */
  .topbar {
    padding: 0.4rem 1.5rem;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
  }

  /* Nav */
  .site-nav {
    padding: 0 1.5rem;
    height: 60px;
    flex-wrap: wrap;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--tr-navy-mid);
    padding: 1rem 1.5rem;
    gap: 0.25rem;
    border-bottom: 1px solid rgba(196, 154, 60, 0.2);
    z-index: 99;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.6rem 0.5rem;
    font-size: 0.85rem;
  }

  .nav-cta {
    display: none;
  }

  /* Hero */
  .hero {
    padding: 4rem 1.5rem 3rem;
    min-height: 70vh;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-primary-lg,
  .btn-ghost-lg {
    width: 100%;
    justify-content: center;
  }

  /* Stats Bar */
  .stats-bar {
    gap: 1.5rem;
    padding: 1.25rem 1.5rem;
  }

  /* About */
  .about-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-image {
    min-height: 260px;
  }

  /* Focus */
  .focus-grid {
    grid-template-columns: 1fr;
  }

  /* Geography */
  .geo-tabs {
    gap: 0.15rem;
  }

  .tab-btn {
    font-size: 0.65rem;
    padding: 0.5rem 0.65rem;
  }

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

  /* CTA Banner */
  .cta-banner {
    padding: 3rem 1.5rem;
  }

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

  .btn-cta-dark,
  .btn-cta-outline {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  /* Footer */
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .site-footer {
    padding: 2.5rem 1.5rem 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .stats-bar {
    gap: 1rem;
  }

  .stat-value {
    font-size: 1.4rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }
}