/* ========================================
   CSS Variables & Reset
======================================== */
:root {
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'DM Sans', sans-serif;

  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-accent: #2563eb;
  --color-border: #1a1a1a;
  --color-card-bg: #ffffff;

  --corner-size: 30px;
  --corner-thickness: 2px;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;

  --nav-height: 80px;
  --card-height: calc(100vh - var(--nav-height) - 150px);
}

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

html {
  scroll-behavior: auto;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

/* ========================================
   Typography
======================================== */
.font-mono {
  font-family: var(--font-mono);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  font-weight: 500;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* ========================================
   Navigation
======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  background-color: var(--color-bg);
  z-index: 1000;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 0.2s ease;
}

.nav-link:hover {
  opacity: 0.6;
}

.nav-fyi {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 0.2s ease;
}

.nav-fyi:hover {
  opacity: 0.6;
}

/* ========================================
   Hero Section
======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--nav-height) var(--spacing-md) var(--spacing-lg);
  padding-top: calc(var(--nav-height) + 4vh);
  max-width: 900px;
}

.hero-statement {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
  text-transform: none;
  letter-spacing: -0.02em;
}

.hero-line {
  display: block;
  white-space: nowrap;
}

.hero-subtext {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.hero-subtext p {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
}

/* ========================================
   Studies Section
======================================== */
.studies {
  padding: 0 var(--spacing-md);
  padding-bottom: 50vh;
}

.studies-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
}

/* ========================================
   Study Card
======================================== */
.study-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: sticky;
  top: calc(var(--nav-height) + 50px);
  height: var(--card-height);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-card-bg);
  will-change: transform;
}

.study-card:last-child {
  margin-bottom: 0;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-card-bg);
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

/* Corner Brackets */
.corner {
  position: absolute;
  width: var(--corner-size);
  height: var(--corner-size);
}

.corner-tl {
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  border-top: var(--corner-thickness) solid var(--color-border);
  border-left: var(--corner-thickness) solid var(--color-border);
}

.corner-tr {
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  border-top: var(--corner-thickness) solid var(--color-border);
  border-right: var(--corner-thickness) solid var(--color-border);
}

.corner-bl {
  bottom: var(--spacing-sm);
  left: var(--spacing-sm);
  border-bottom: var(--corner-thickness) solid var(--color-border);
  border-left: var(--corner-thickness) solid var(--color-border);
}

.corner-br {
  bottom: var(--spacing-sm);
  right: var(--spacing-sm);
  border-bottom: var(--corner-thickness) solid var(--color-border);
  border-right: var(--corner-thickness) solid var(--color-border);
}

/* Card Content */
.card-content {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto 1fr;
  height: 100%;
  padding: var(--spacing-sm);
  overflow: hidden;
  column-gap: var(--spacing-lg);
}

.card-header {
  display: contents;
}

.card-title {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 500;
  max-width: 500px;
  line-height: 1;
  margin: 0;
  grid-column: 1;
  grid-row: 2;
}

.card-meta {
  grid-column: 2;
  grid-row: 2 / 4;
  align-self: start;
  /* Offset to align cap-height with headline */
  padding-top: 0.2em;
}

.card-role {
  text-align: left;
}

.role-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: var(--spacing-xs);
  line-height: 1;
}

.role-tags {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.5rem;
}

.role-tags li {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

.card-link-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  line-height: 1;
  color: var(--color-text);
}

.card-description {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--color-text-muted);
  max-width: 550px;
  margin-top: 10px;
  grid-column: 1;
  grid-row: 3;
}

/* Card Mockup */
.card-mockup {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  min-width: 0;
  margin-top: var(--spacing-sm);
  overflow: hidden;
  grid-column: 1 / -1;
  grid-row: 4;
  background-color: #ffffff;
  border-radius: 8px;
}

.mockup-image {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.mockup-placeholder {
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.card-counter {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-bottom: 0.35rem;
  color: var(--color-text-muted);
  grid-column: 1 / -1;
  grid-row: 1;
}

.card-counter::before {
  content: '(';
}

.card-counter::after {
  content: ')';
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 1024px) {
  :root {
    --card-height: calc(100vh - var(--nav-height) - 130px);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
    --corner-size: 20px;
    --spacing-lg: 2rem;
    --card-height: calc(100vh - var(--nav-height) - 100px);
  }

  .hero {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }

  .hero-statement {
    font-size: 1.75rem;
  }

  .hero-subtext p {
    font-size: 1rem;
  }

  .hero-line {
    white-space: normal;
  }

  .studies {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }

  .card-inner {
    padding: var(--spacing-sm);
  }

  .card-content {
    padding: var(--spacing-sm);
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto 1fr;
  }

  .card-counter {
    grid-row: 1;
  }

  .card-title {
    font-size: 1.125rem;
    grid-column: 1;
    grid-row: 2;
  }

  .card-meta {
    grid-column: 1;
    grid-row: 3;
    margin-top: var(--spacing-sm);
  }

  .card-description {
    font-size: 0.875rem;
    grid-column: 1;
    grid-row: 4;
  }

  .card-mockup {
    grid-row: 5;
  }

  .card-counter {
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .card-meta {
    margin-top: var(--spacing-sm);
  }
}

/* ========================================
   FYI Section
======================================== */
.fyi-section {
  max-width: 900px;
  margin: 0 auto 2rem;
  padding: var(--spacing-xl) var(--spacing-md);
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  scroll-margin-top: var(--nav-height);
}

.fyi-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.fyi-content {
  flex: 1;
}

.fyi-portrait {
  width: 130px;
  height: 130px;
  border-radius: 0;
  object-fit: cover;
  flex-shrink: 0;
}

.fyi-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  line-height: 1;
  margin-top: 0;
  margin-bottom: 16px;
  text-transform: none;
  letter-spacing: -0.01em;
}

.fyi-body {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  max-width: 500px;
}

.fyi-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.fyi-link {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  transition: opacity 0.2s ease;
}

.fyi-link:hover {
  opacity: 0.6;
}

.fyi-link:last-child {
  border-bottom: none;
}

.fyi-link-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  min-width: 100px;
}

.fyi-link-value {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .fyi-section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .fyi-title {
    font-size: 1.5rem;
  }

  .fyi-body {
    font-size: 1rem;
  }

  .fyi-link {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .fyi-link-label {
    min-width: auto;
  }

  .fyi-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .fyi-portrait {
    width: 100px;
    height: 100px;
  }
}

/* ========================================
   ASCII Background (First Viewport)
======================================== */
.ascii-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

/* Content above ASCII */
.hero {
  position: relative;
  z-index: 1;
}

/* Solid background for content below first viewport */
.studies {
  position: relative;
  z-index: 2;
  background: var(--color-bg);
}

.fyi-section {
  position: relative;
  z-index: 2;
}

.fyi-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: calc(100% + 2rem);
  background: var(--color-bg);
  z-index: -1;
}

/* ========================================
   Footer — Inscription Style
======================================== */
.site-footer {
  position: relative;
  z-index: 2;
  height: clamp(180px, 20.07vw, 289px);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
}

.footer-main {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 0 clamp(12px, 1.67vw, 24px) clamp(28px, 3.89vw, 56px) clamp(12px, 1.67vw, 24px);
}

/* Left Block */
.footer-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(0.5px, 0.07vw, 1px);
}

.footer-identity {
  display: flex;
  align-items: center;
}

.footer-logo {
  height: clamp(54px, 7.5vw, 108px);
  width: auto;
  margin-left: clamp(-8px, -0.54vw, -4px);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 1.39vw, 20px);
}

.footer-version {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.08vw, 30px);
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}

.footer-status {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.39vw, 20px);
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* Right Block */
.footer-right {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 1.67vw, 24px);
}

.footer-data {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: clamp(4px, 0.56vw, 8px);
  text-align: right;
  margin-bottom: clamp(-48px, -3.33vw, -24px);
  margin-right: clamp(-12px, -0.83vw, -6px);
}

.footer-coords {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.08vw, 30px);
  color: var(--color-text);
  line-height: 1;
}

.footer-telemetry {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.39vw, 20px);
  color: var(--color-text-muted);
  opacity: 0.6;
  line-height: 1;
}

.footer-marker {
  display: flex;
  align-items: flex-end;
  margin-bottom: clamp(-28px, -1.94vw, -14px);
  margin-right: clamp(-16px, -2.29vw, -32px);
}

.footer-hindi {
  width: clamp(28px, 3.82vw, 55px);
  height: clamp(82px, 11.39vw, 164px);
  opacity: 0.3;
}

.footer-est {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.39vw, 20px);
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  writing-mode: vertical-rl;
  margin-bottom: clamp(-52px, -3.61vw, -26px);
  margin-left: clamp(-16px, -2.29vw, -32px);
}

/* Bottom Calibration Bar */
.footer-bar {
  height: clamp(24px, 3.33vw, 48px);
  background: #1a1a1a;
  display: flex;
  align-items: center;
  padding: 0 clamp(24px, 3.33vw, 48px);
}

.footer-bar-spacer {
  flex: 3; /* 75% */
}

.footer-ticks {
  flex: 1; /* 25% */
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  gap: clamp(4px, 0.56vw, 8px);
  height: 100%;
  padding: clamp(6px, 0.83vw, 12px) 0;
}

.tick {
  width: 1px;
  background: #fff;
}

.tick-major {
  height: clamp(10px, 1.39vw, 20px);
}

.tick-minor {
  height: clamp(5px, 0.69vw, 10px);
  opacity: 0.5;
}

/* Footer Responsive - tablet/medium screens */
@media (max-width: 1024px) and (min-width: 769px) {
  .footer-right {
    gap: 16px;
  }

  .footer-marker {
    margin-bottom: -20px;
    margin-right: -20px;
  }

  .footer-est {
    margin-bottom: -35px;
    margin-left: -20px;
  }

  .footer-data {
    margin-bottom: -35px;
    margin-right: -8px;
  }
}

/* Footer Responsive - stack on mobile */
@media (max-width: 768px) {
  .site-footer {
    height: auto;
    min-height: 200px;
  }

  .footer-main {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding: 0 8px 24px;
  }

  .footer-right {
    width: 100%;
    justify-content: flex-end;
    align-items: flex-end;
    gap: 8px;
  }

  .footer-data {
    margin-bottom: -16px;
    margin-right: 0;
  }

  .footer-marker {
    margin-bottom: 0;
    margin-right: -4px;
  }

  .footer-est {
    margin-bottom: -20px;
    margin-left: -4px;
  }
}