/* 1. Variables */
:root {
  /* Primary Background */
  --solar-black: #0C0D0F;
  /* Secondary Background */
  --orbit-charcoal: #17191D;
  /* Elevated Surface */
  --meteor-graphite: #24272D;
  /* Secondary Surface */
  --lunar-slate: #333840;
  /* Primary Accent */
  --solar-amber: #E59A3A;
  /* Secondary Accent */
  --mars-terracotta: #B95F45;
  /* Navigation Accent */
  --ion-cyan: #69AEB8;
  /* Scientific Accent */
  --orbit-sage: #8A9B78;
  /* Light Surface */
  --lunar-paper: #D8D5CC;
  /* Primary Text */
  --starlight-ivory: #F2EFE7;
  /* Secondary Text */
  --moon-dust: #C2C1BA;
  /* Muted Text */
  --telemetry-grey: #858A90;
  /* Border */
  --border-color: #3D4249;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--solar-amber), var(--mars-terracotta));
  --gradient-secondary: linear-gradient(135deg, var(--ion-cyan), var(--orbit-sage));

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing */
  --container-max: 1440px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-standard: 0.3s ease;
}

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

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

body {
  background-color: var(--solar-black);
  color: var(--starlight-ivory);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

button, input, textarea {
  font-family: inherit;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

/* Image Wrappers */
.img-wrapper {
  position: relative;
  overflow: hidden;
  background-color: var(--lunar-slate); /* Placeholder background */
}
.img-wrapper img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 3. Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.mono-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--telemetry-grey);
}

.accent-text {
  color: var(--solar-amber);
}

.text-link {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--starlight-ivory);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: all var(--transition-fast);
}
.text-link:hover {
  color: var(--solar-amber);
  border-bottom-color: var(--solar-amber);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  background-color: transparent;
  color: var(--starlight-ivory);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 4px; height: 100%;
  background-color: var(--solar-amber);
  transition: width var(--transition-fast);
  z-index: -1;
}
.btn-primary:hover::before {
  width: 100%;
}
.btn-primary:hover {
  color: var(--solar-black);
  border-color: var(--solar-amber);
}

/* 4. Global Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-header {
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.section-header .mono-text {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-xs);
  display: inline-block;
}

/* 5. Telemetry Line */
.telemetry-line {
  background-color: var(--solar-amber);
  color: var(--solar-black);
  padding: 0.4rem 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}
.telemetry-line .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.telemetry-line .center {
  opacity: 0.8;
}

/* 6. Orbital Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--solar-black);
  border-bottom: 1px solid var(--border-color);
}
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}
.header-brand {
  display: flex;
  align-items: center;
}
.brand-logo {
  max-width: 260px;
  height: auto;
  display: block;
}
.footer-logo {
  max-width: 220px;
  height: auto;
  display: block;
  margin-bottom: var(--spacing-md);
}
.header-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.status-block {
  display: flex;
  gap: var(--spacing-md);
  text-align: right;
}
.status-item {
  display: flex;
  flex-direction: column;
}
.status-item span:first-child {
  color: var(--telemetry-grey);
}
.status-item span:last-child {
  color: var(--ion-cyan);
}

.header-bottom .nav-list {
  display: flex;
  gap: var(--spacing-md);
}
.header-bottom .nav-list a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  padding: var(--spacing-sm) 0;
  display: block;
  position: relative;
}
.header-bottom .nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background-color: var(--solar-amber);
  transition: width var(--transition-fast);
}
.header-bottom .nav-list a:hover::after {
  width: 100%;
}
.header-bottom .nav-list a::before {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 4px; height: 4px;
  background-color: var(--solar-amber);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.header-bottom .nav-list a:hover::before {
  opacity: 1;
}

.mobile-menu-toggle {
  display: none;
  font-family: var(--font-mono);
  color: var(--starlight-ivory);
  font-size: 1rem;
  cursor: pointer;
}

/* 7. Survey Cover (Hero) */
.survey-cover {
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}
.survey-cover .top-band {
  margin-bottom: var(--spacing-md);
}
.survey-cover h2 {
  font-size: clamp(3rem, 6vw, 5.5rem);
  max-width: 75%;
  margin-top: var(--spacing-xs);
}
.hero-main {
  display: grid;
  grid-template-columns: 82% 18%;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}
.hero-image {
  aspect-ratio: 18/7;
}
.hero-metadata {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  border-left: 1px solid var(--border-color);
  padding-left: var(--spacing-md);
}
.meta-item {
  display: flex;
  flex-direction: column;
}
.hero-description {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  align-items: center;
}
.hero-description p {
  font-size: 1.1rem;
  color: var(--moon-dust);
  max-width: 90%;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* 8. Orbit Sequence */
.orbit-sequence {
  background-color: var(--orbit-charcoal);
  border-bottom: 1px solid var(--border-color);
}
.orbit-grid {
  display: grid;
  grid-template-columns: 30% 70%;
  gap: var(--spacing-lg);
}
.orbit-left .number {
  font-family: var(--font-display);
  font-size: 8rem;
  line-height: 1;
  color: var(--meteor-graphite);
  margin-bottom: var(--spacing-sm);
}
.orbit-list {
  display: flex;
  flex-direction: column;
}
.orbit-item {
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 100px 1fr 2fr;
  gap: var(--spacing-md);
  align-items: start;
}
.orbit-item:last-child {
  border-bottom: 1px solid var(--border-color);
}
.orbit-item h3 {
  font-size: 1.2rem;
}
.orbit-item p {
  color: var(--telemetry-grey);
  font-size: 0.95rem;
}
.orbit-progress {
  width: 100%;
  height: 1px;
  background-color: var(--border-color);
  margin-top: var(--spacing-sm);
  position: relative;
}
.orbit-progress::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 30%; height: 100%;
  background-color: var(--ion-cyan);
}

/* 9. Observation Deck */
.observation-deck {
  border-bottom: 1px solid var(--border-color);
}
.obs-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-lg);
}
.obs-header h2 {
  font-size: 3rem;
}
.obs-header p {
  max-width: 400px;
  text-align: right;
  color: var(--moon-dust);
}
.game-frame {
  background-color: var(--meteor-graphite);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.game-frame::before, .game-frame::after {
  content: '';
  position: absolute;
  width: 10px; height: 10px;
  border: 2px solid var(--solar-amber);
  z-index: 10;
}
.game-frame::before { top: 0; left: 0; border-right: none; border-bottom: none; border-top-left-radius: 10px;}
.game-frame::after { bottom: 0; right: 0; border-left: none; border-top: none; border-bottom-right-radius: 10px;}

.game-main {
  display: flex;
  min-height: 600px;
}
.telemetry-rail {
  width: 110px;
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  background-color: var(--solar-black);
}
.rail-item {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  display: flex;
  gap: 5px;
}
.rail-item span:first-child { color: var(--telemetry-grey); }
.game-iframe-wrapper {
  flex: 1;
  background-color: #000;
}
.game-iframe-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}
.game-dock {
  background-color: var(--solar-black);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.dock-status {
  width: 100px;
  height: 2px;
  background-color: var(--ion-cyan);
}
.dock-controls {
  display: flex;
  gap: var(--spacing-md);
}

/* 10. Planetary Records */
.field-records {
  border-bottom: 1px solid var(--border-color);
}
/* Record 01 */
.record-01 {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin-bottom: var(--spacing-xl);
}
.record-01 .img-wrapper {
  width: 72%;
  aspect-ratio: 16/9;
  margin-bottom: var(--spacing-md);
}
.record-01 .content {
  width: 40%;
  background-color: var(--solar-black);
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
  margin-top: -80px;
  position: relative;
  z-index: 2;
}

/* Record 02 */
.record-02 {
  background-color: rgba(185, 95, 69, 0.1); /* Mars Terracotta tint */
  border-top: 1px solid var(--mars-terracotta);
  border-bottom: 1px solid var(--mars-terracotta);
  margin-bottom: var(--spacing-xl);
}
.record-02 .container {
  display: flex;
  padding: 0;
}
.record-02 .content {
  width: 40%;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.record-02 .num {
  font-family: var(--font-display);
  font-size: 6rem;
  color: var(--mars-terracotta);
  opacity: 0.5;
  line-height: 1;
}
.record-02 .img-wrapper {
  width: 60%;
  aspect-ratio: 4/5;
}

/* Record 03 */
.record-03 {
  position: relative;
}
.record-03 .img-wrapper {
  width: 100%;
  height: 300px;
  margin-bottom: var(--spacing-lg);
}
.record-03 .bg-text {
  position: absolute;
  top: 150px; left: 0;
  font-family: var(--font-display);
  font-size: 15vw;
  color: var(--meteor-graphite);
  line-height: 1;
  z-index: -1;
  opacity: 0.3;
}
.record-03 .content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

/* 11. Transmission Log */
.transmission-log {
  background-color: var(--orbit-charcoal);
  border-bottom: 1px solid var(--border-color);
}
.trans-grid {
  display: grid;
  grid-template-columns: 38% 62%;
  gap: var(--spacing-lg);
}
.trans-left h2 {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}
.trans-left p {
  color: var(--moon-dust);
  font-size: 1.1rem;
}
.trans-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}
.trans-entry {
  border: 1px solid var(--border-color);
  padding: var(--spacing-md);
  background-color: var(--solar-black);
}
.trans-entry header {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}
.trans-entry h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}
.trans-entry p {
  color: var(--moon-dust);
}

/* 12. Access Specs */
.access-specs {
  background-color: var(--lunar-paper);
  color: var(--solar-black);
}
.access-specs .mono-text {
  color: var(--solar-black);
  border-color: var(--solar-black);
}
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-lg);
}
.spec-left h2 {
  font-size: 3rem;
  margin-top: var(--spacing-md);
}
.spec-table {
  display: flex;
  flex-direction: column;
}
.spec-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--solar-black);
}
.spec-row:first-child {
  border-top: 1px solid var(--solar-black);
}
.spec-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  font-weight: bold;
}

/* 13. Ground Control */
.ground-control {
  background-color: var(--orbit-charcoal);
  border-bottom: 1px solid var(--border-color);
}
.gc-grid {
  display: grid;
  grid-template-columns: 32% 68%;
  gap: var(--spacing-lg);
}
.gc-left h2 {
  font-size: 2.5rem;
  margin: var(--spacing-sm) 0;
}
.email-text {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ion-cyan);
  display: block;
  margin-bottom: var(--spacing-lg);
}
.faq-refs {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
}
.faq-refs h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--telemetry-grey);
  margin-bottom: var(--spacing-sm);
}
.faq-refs ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.faq-refs a {
  color: var(--moon-dust);
  border-bottom: 1px solid transparent;
}
.faq-refs a:hover {
  color: var(--starlight-ivory);
  border-color: var(--starlight-ivory);
}

.gc-form {
  background-color: var(--solar-black);
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
}
.form-group {
  margin-bottom: var(--spacing-md);
}
.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--telemetry-grey);
  margin-bottom: var(--spacing-xs);
}
.form-control {
  width: 100%;
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--starlight-ivory);
  padding: 0.8rem;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}
.form-control:focus {
  outline: none;
  border-color: var(--solar-amber);
}
textarea.form-control {
  resize: vertical;
  min-height: 120px;
}
.form-message {
  margin-top: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: none;
}
.form-message.success { color: var(--orbit-sage); display: block; }
.form-message.error { color: var(--mars-terracotta); display: block; }

/* 14. Cookie Notice */
.cookie-notice {
  position: fixed;
  bottom: var(--spacing-md);
  left: var(--spacing-md);
  width: 320px;
  background-color: var(--lunar-paper);
  color: var(--solar-black);
  border-top: 3px solid var(--ion-cyan);
  border-radius: 6px;
  padding: var(--spacing-md);
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  display: none;
}
.cookie-notice.visible {
  display: block;
}
.cookie-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}
.cookie-status {
  width: 8px; height: 8px;
  background-color: var(--solar-amber);
}
.cookie-header .mono-text {
  color: var(--solar-black);
}
.cookie-notice h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}
.cookie-notice p {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}
.cookie-actions {
  display: flex;
  gap: var(--spacing-sm);
}
.btn-cookie {
  flex: 1;
  padding: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  border: 1px solid var(--solar-black);
  cursor: pointer;
  background: transparent;
  color: var(--solar-black);
}
.btn-cookie.accept {
  background-color: var(--solar-black);
  color: var(--lunar-paper);
}

/* 15. Orbital Footer */
.site-footer {
  background-color: var(--solar-black);
}
.footer-upper {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-color);
}
.footer-grid {
  display: grid;
  grid-template-columns: 42% 58%;
  gap: var(--spacing-lg);
}
.footer-brand .brand-text {
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}
.footer-brand p {
  color: var(--moon-dust);
  font-size: 0.95rem;
  max-width: 400px;
  margin-bottom: var(--spacing-md);
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--telemetry-grey);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}
.footer-col a {
  color: var(--moon-dust);
  font-size: 0.95rem;
}
.footer-col a:hover {
  color: var(--starlight-ivory);
}

.footer-lower {
  padding: var(--spacing-sm) 0;
  background-color: var(--orbit-charcoal);
}
.footer-lower .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--telemetry-grey);
}
.footer-lower .center {
  color: var(--mars-terracotta);
}
.footer-lower .footer-address {
  justify-content: center;
  margin-top: 0.5rem;
}

/* 16. Internal Pages */
.internal-masthead {
  padding: var(--spacing-lg) 0 var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--orbit-charcoal);
}
.internal-masthead h1 {
  font-size: 4rem;
  margin: var(--spacing-sm) 0;
}
.internal-content {
  padding: var(--spacing-lg) 0;
}
.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}
.content-wrapper h2 {
  font-size: 2rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--solar-amber);
}
.content-wrapper p {
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
  color: var(--moon-dust);
}
.content-wrapper ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-md);
  list-style: square;
  color: var(--moon-dust);
}
.content-wrapper li {
  margin-bottom: var(--spacing-xs);
}
.return-home {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: center;
}

/* 17. Animations */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    animation: fadeIn 0.5s ease forwards;
  }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

/* 18. Responsive Rules */
@media (max-width: 1024px) {
  .hero-main { grid-template-columns: 1fr; }
  .hero-metadata { border-left: none; border-top: 1px solid var(--border-color); padding-left: 0; padding-top: var(--spacing-md); flex-direction: row; flex-wrap: wrap; }
  .orbit-grid { grid-template-columns: 1fr; }
  .orbit-left .number { font-size: 4rem; }
  .game-main { flex-direction: column; min-height: auto; }
  .telemetry-rail { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); flex-direction: row; justify-content: space-around; padding: var(--spacing-sm); }
  .rail-item { writing-mode: horizontal-tb; transform: none; }
  .game-iframe-wrapper { height: 500px; }
  .trans-grid, .spec-grid, .gc-grid, .footer-grid { grid-template-columns: 1fr; }
  .record-01 .img-wrapper { width: 100%; }
  .record-01 .content { width: 90%; margin-top: -40px; }
  .record-02 .container { flex-direction: column; }
  .record-02 .content, .record-02 .img-wrapper { width: 100%; }
  .record-03 .content-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header-top { border-bottom: none; }
  .header-status { display: none; }
  .header-bottom { display: none; background-color: var(--solar-black); padding: var(--spacing-md) 0; border-top: 1px solid var(--border-color); }
  .header-bottom.active { display: block; position: absolute; top: 100%; left: 0; width: 100%; }
  .header-bottom .nav-list { flex-direction: column; gap: var(--spacing-xs); }
  .mobile-menu-toggle { display: block; }
  .hero-description { grid-template-columns: 1fr; }
  .hero-actions { justify-content: flex-start; }
  .obs-header { flex-direction: column; align-items: flex-start; gap: var(--spacing-sm); }
  .obs-header p { text-align: left; }
  .game-iframe-wrapper { height: 400px; }
  .spec-row { grid-template-columns: 1fr; gap: var(--spacing-xs); }
  .footer-nav { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .footer-lower .container { flex-direction: column; gap: var(--spacing-sm); text-align: center; }
  .internal-masthead h1 { font-size: 2.5rem; }
}

/* 19. Utilities */
.hidden { display: none !important; }