/* ==========================================================================
   EXOPLANET HUNTER - DESIGN SYSTEM & STYLESHEET
   NGN Hacks 2026 Judge-Optimized Edition
   Strict 6-Color Palette:
   Midnight #070A3C | Catalina Blue #062375 | Pohutukawa #6A1A29
   Portland Orange #F0662A | Mimollette #F6941D | Hawkbite #FED46D
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Core Color Palette Tokens */
  --clr-midnight: #070A3C;
  --clr-catalina: #062375;
  --clr-pohutukawa: #6A1A29;
  --clr-portland: #F0662A;
  --clr-mimollette: #F6941D;
  --clr-hawkbite: #FED46D;

  /* Text & Surface Variants */
  --clr-text-main: #E2E8F0;
  --clr-text-bright: #FFFFFF;
  --clr-text-muted: #94A3B8;

  --bg-card: rgba(6, 35, 117, 0.35);
  --bg-card-hover: rgba(6, 35, 117, 0.55);
  --border-subtle: rgba(106, 26, 41, 0.6);
  --border-active: rgba(240, 102, 42, 0.8);

  /* Typography Families */
  --font-serif: 'Cinzel', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Transitions & Shadows */
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 25px rgba(240, 102, 42, 0.2);
  --shadow-card: 0 10px 30px rgba(7, 10, 60, 0.5);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--clr-midnight);
  color: var(--clr-text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Fullscreen Starfield Canvas */
#starfield-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* App Wrapper */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem 1.5rem;
}

/* Typography Utilities */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  color: var(--clr-hawkbite);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

p {
  color: var(--clr-text-main);
  font-size: 1.05rem;
}

.highlight-hawkbite { color: var(--clr-hawkbite); }
.highlight-mimollette { color: var(--clr-mimollette); }
.highlight-portland { color: var(--clr-portland); }
.text-muted { color: var(--clr-text-muted); }

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(106, 26, 41, 0.4);
}

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

.brand-icon {
  font-size: 1.6rem;
  color: var(--clr-portland);
  text-shadow: 0 0 12px var(--clr-portland);
}

.brand-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--clr-hawkbite);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  color: var(--clr-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--clr-hawkbite);
}

/* ==========================================================================
   1. HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 4.5rem 0 3.5rem 0;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  background: rgba(106, 26, 41, 0.4);
  border: 1px solid var(--clr-pohutukawa);
  border-radius: 50px;
  color: var(--clr-mimollette);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--clr-hawkbite);
  margin-bottom: 1.25rem;
  text-shadow: 0 0 30px rgba(254, 212, 109, 0.2);
}

.hero-subtitle {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--clr-mimollette);
  font-weight: 500;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--clr-text-main);
  max-width: 720px;
  margin: 0 auto 2.5rem auto;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-mimollette) 0%, var(--clr-portland) 100%);
  color: #070A3C;
  border: none;
  box-shadow: 0 4px 20px rgba(240, 102, 42, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(240, 102, 42, 0.5);
  background: linear-gradient(135deg, var(--clr-hawkbite) 0%, var(--clr-mimollette) 100%);
}

.btn-secondary {
  background: rgba(6, 35, 117, 0.4);
  color: var(--clr-hawkbite);
  border: 1px solid var(--clr-catalina);
}

.btn-secondary:hover {
  background: rgba(6, 35, 117, 0.8);
  border-color: var(--clr-pohutukawa);
  color: var(--clr-text-bright);
}

/* ==========================================================================
   2. 3-STEP VISUAL CONCEPT EXPLANATION
   ========================================================================== */
.concept-section {
  padding: 3rem 0;
  margin-bottom: 4rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: var(--clr-hawkbite);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--clr-text-muted);
  font-size: 1.05rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  transition: var(--transition-smooth);
}

.concept-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-pohutukawa);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card);
}

.step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-portland);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  padding: 0.2rem 0.6rem;
  background: rgba(106, 26, 41, 0.4);
  border-radius: 4px;
}

.concept-icon-visual {
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
  position: relative;
}

/* Simple CSS Astronomy Mini Visuals */
.star-visual {
  width: 50px;
  height: 50px;
  background: radial-gradient(circle, var(--clr-hawkbite) 0%, var(--clr-mimollette) 70%, transparent 100%);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--clr-hawkbite);
  position: relative;
}

.planet-visual {
  width: 14px;
  height: 14px;
  background: #070A3C;
  border: 2px solid var(--clr-portland);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 20%;
  transform: translateY(-50%);
  animation: transitPass 4s infinite ease-in-out;
}

@keyframes transitPass {
  0% { left: 15%; opacity: 0.3; }
  50% { left: 45%; opacity: 1; }
  100% { left: 80%; opacity: 0.3; }
}

.dip-visual-line {
  width: 120px;
  height: 40px;
  border-bottom: 2px solid var(--clr-hawkbite);
  position: relative;
}

.dip-visual-line::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 40%;
  width: 30px;
  height: 15px;
  border-bottom: 3px solid var(--clr-portland);
  border-left: 2px dashed var(--clr-portland);
  border-right: 2px dashed var(--clr-portland);
  border-bottom-left-radius: 6px;
  border-bottom-right-radius: 6px;
}

.concept-card h3 {
  font-size: 1.15rem;
  color: var(--clr-hawkbite);
  margin-bottom: 0.6rem;
}

.concept-card p {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
}

/* ==========================================================================
   3. INTERACTIVE DEMO & PRESET SELECTION
   ========================================================================== */
.demo-section {
  scroll-margin-top: 2rem;
  margin-bottom: 4rem;
}

.presets-container {
  margin-bottom: 2rem;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.25rem;
}

.preset-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.25rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  text-align: left;
}

.preset-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--clr-mimollette);
  transform: translateY(-2px);
}

.preset-card.active {
  border-color: var(--clr-portland);
  background: rgba(6, 35, 117, 0.7);
  box-shadow: 0 0 20px rgba(240, 102, 42, 0.3);
}

.preset-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.preset-icon {
  font-size: 1.4rem;
}

.preset-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-hawkbite);
}

.preset-badge {
  font-size: 0.72rem;
  color: var(--clr-mimollette);
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.preset-desc {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  line-height: 1.4;
}

/* Upload Dropzone option */
.upload-box {
  border: 2px dashed var(--clr-catalina);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
  background: rgba(7, 10, 60, 0.4);
}

.upload-box:hover {
  border-color: var(--clr-portland);
  background: rgba(6, 35, 117, 0.4);
}

.upload-box p {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
}

/* ==========================================================================
   4. LIGHT CURVE VISUALIZATION CONTAINER
   ========================================================================== */
.chart-workspace {
  background: rgba(7, 10, 60, 0.85);
  border: 1px solid var(--clr-pohutukawa);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-card);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(6, 35, 117, 0.6);
}

.chart-title-area h3 {
  font-size: 1.25rem;
  color: var(--clr-hawkbite);
  margin-bottom: 0.2rem;
}

.chart-subtitle {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--clr-text-main);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.dot-normal {
  width: 10px;
  height: 10px;
  background-color: var(--clr-hawkbite);
  border-radius: 50%;
}

.dot-transit {
  width: 10px;
  height: 10px;
  background-color: var(--clr-portland);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--clr-portland);
}

.canvas-wrapper {
  width: 100%;
  position: relative;
  min-height: 320px;
}

/* View Mode Toggles */
.chart-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(6, 35, 117, 0.4);
}

.toggle-group {
  display: flex;
  background: rgba(6, 35, 117, 0.4);
  border-radius: 6px;
  padding: 3px;
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--clr-text-muted);
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.toggle-btn.active {
  background: var(--clr-pohutukawa);
  color: var(--clr-hawkbite);
}

/* ==========================================================================
   5. RESULT SCREEN & CANDIDATE SCORE
   ========================================================================== */
.results-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

@media (max-width: 900px) {
  .results-section {
    grid-template-columns: 1fr;
  }
}

.result-card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.status-badge.candidate {
  background: rgba(240, 102, 42, 0.2);
  border: 1px solid var(--clr-portland);
  color: var(--clr-portland);
}

.status-badge.false-positive {
  background: rgba(106, 26, 41, 0.4);
  border: 1px solid var(--clr-pohutukawa);
  color: var(--clr-mimollette);
}

.result-summary-text {
  font-size: 1.15rem;
  color: var(--clr-text-bright);
  font-weight: 500;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.score-display-box {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem;
  background: rgba(7, 10, 60, 0.7);
  border: 1px solid var(--clr-catalina);
  border-radius: 10px;
  margin-bottom: 1.5rem;
}

.score-number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 900;
  color: var(--clr-hawkbite);
  line-height: 1;
}

.score-label-group {
  display: flex;
  flex-direction: column;
}

.score-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-mimollette);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.score-sub {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}

/* Evidence Checklist Grid */
.evidence-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 2rem;
}

.evidence-header-title {
  font-size: 1.15rem;
  color: var(--clr-hawkbite);
  margin-bottom: 1.25rem;
}

.evidence-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.evidence-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem;
  background: rgba(7, 10, 60, 0.5);
  border-radius: 8px;
  border-left: 3px solid var(--clr-catalina);
}

.evidence-item.pass {
  border-left-color: var(--clr-portland);
}

.evidence-icon {
  font-size: 1.1rem;
  line-height: 1.2;
}

.evidence-item.pass .evidence-icon { color: var(--clr-portland); }

.evidence-content {
  display: flex;
  flex-direction: column;
}

.evidence-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text-bright);
}

.evidence-detail {
  font-size: 0.83rem;
  color: var(--clr-text-muted);
}

/* "What Does This Mean?" Disclaimer Card */
.disclaimer-card {
  grid-column: 1 / -1;
  background: rgba(106, 26, 41, 0.25);
  border: 1px solid var(--clr-pohutukawa);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.disclaimer-icon {
  font-size: 2rem;
  color: var(--clr-mimollette);
}

.disclaimer-text h4 {
  font-size: 1rem;
  color: var(--clr-hawkbite);
  margin-bottom: 0.3rem;
}

.disclaimer-text p {
  font-size: 0.92rem;
  color: var(--clr-text-main);
}

/* ==========================================================================
   6. WHY THIS MATTERS & ORIGINALITY SECTIONS
   ========================================================================== */
.info-grid-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

@media (max-width: 800px) {
  .info-grid-section {
    grid-template-columns: 1fr;
  }
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem;
}

.info-card h3 {
  font-size: 1.2rem;
  color: var(--clr-hawkbite);
  margin-bottom: 1rem;
}

.info-card p {
  font-size: 0.98rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-list li {
  font-size: 0.92rem;
  color: var(--clr-text-main);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.feature-list li::before {
  content: '✦';
  color: var(--clr-mimollette);
}

/* ==========================================================================
   7. UNDER THE HOOD - SCIENTIFIC PIPELINE
   ========================================================================== */
.pipeline-section {
  background: rgba(7, 10, 60, 0.6);
  border: 1px solid var(--clr-pohutukawa);
  border-radius: 14px;
  padding: 2.5rem;
  margin-bottom: 4rem;
}

.pipeline-flow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.pipeline-step {
  background: rgba(6, 35, 117, 0.4);
  border: 1px solid var(--clr-catalina);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  text-align: center;
  flex: 1;
  min-width: 140px;
}

.step-num-small {
  font-size: 0.75rem;
  color: var(--clr-portland);
  font-weight: 700;
  display: block;
}

.step-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-hawkbite);
}

.flow-arrow {
  color: var(--clr-mimollette);
  font-size: 1.2rem;
}

@media (max-width: 768px) {
  .flow-arrow { display: none; }
  .pipeline-flow { flex-direction: column; }
}

/* Collapsible Details */
details {
  background: rgba(6, 35, 117, 0.25);
  border: 1px solid var(--clr-catalina);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}

summary {
  font-weight: 700;
  color: var(--clr-hawkbite);
  cursor: pointer;
  font-size: 0.95rem;
}

.details-content {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

/* ==========================================================================
   8. FOOTER & CREDITS / DISCLOSURES
   ========================================================================== */
.site-footer {
  border-top: 1px solid rgba(106, 26, 41, 0.4);
  padding: 3rem 0 1.5rem 0;
  font-size: 0.88rem;
  color: var(--clr-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-size: 0.95rem;
  color: var(--clr-hawkbite);
  margin-bottom: 0.8rem;
}

.disclosures-list {
  list-style: none;
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.copyright {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(6, 35, 117, 0.4);
  font-size: 0.8rem;
}