/* =============================================
   RENDERON PLATFORM — MAIN STYLESHEET
   Minimalist. Precise. No noise.
   ============================================= */

:root {
  --black:       #0A0A0A;
  --white:       #FFFFFF;
  --grey-100:    #F5F5F5;
  --grey-200:    #E8E8E8;
  --grey-400:    #999999;
  --grey-600:    #444444;
  --grey-800:    #1A1A1A;
  --border:      #1F1F1F;
  --border-light:#2E2E2E;

  --font-display: 'Syne', sans-serif;
  --font-body:    'Inter', sans-serif;

  --nav-h: 64px;
  --container: 1100px;
  --transition: 140ms ease;
}

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

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

body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
}

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

em {
  font-style: italic;
  font-family: var(--font-display);
}

/* ===== LAYOUT ===== */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

.container-full {
  width: 100%;
}

/* ===== BUTTONS ===== */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 10px 20px;
  border: 1px solid var(--white);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  background: transparent;
  color: var(--white);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 10px 20px;
  border: 1px solid var(--border-light);
  transition: border-color var(--transition), background var(--transition);
}

.btn-secondary:hover {
  border-color: var(--grey-400);
  background: var(--grey-800);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  color: var(--grey-400);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  padding: 10px 0;
  border: none;
  background: none;
  transition: color var(--transition);
}

.btn-ghost:hover {
  color: var(--white);
}

/* ===== SECTION LABELS ===== */

.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-400);
}

/* ===== SECTION DIVIDER ===== */

.section-divider {
  height: 1px;
  background: var(--border);
}

/* ===== NAV ===== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
  flex-shrink: 0;
}

.logo-dot {
  color: var(--grey-400);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--grey-400);
  letter-spacing: 0.01em;
  transition: color var(--transition);
}

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

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--white);
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== HERO ===== */

.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + 100px);
  padding-bottom: 120px;
  overflow: hidden;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
}

.grid-lines-v,
.grid-lines-h {
  position: absolute;
  inset: 0;
}

.grid-lines-v {
  background-image: repeating-linear-gradient(
    to right,
    var(--white) 0px,
    var(--white) 1px,
    transparent 1px,
    transparent 80px
  );
}

.grid-lines-h {
  background-image: repeating-linear-gradient(
    to bottom,
    var(--white) 0px,
    var(--white) 1px,
    transparent 1px,
    transparent 80px
  );
}

.hero-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-400);
  margin-bottom: 32px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  max-width: 720px;
}

.hero-title em {
  font-weight: 800;
  font-style: italic;
  color: var(--grey-200);
}

.hero-sub {
  font-size: 1rem;
  font-weight: 300;
  color: var(--grey-400);
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.hero-index {
  position: absolute;
  right: 40px;
  bottom: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-body);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--grey-600);
}

.hero-index-line {
  width: 1px;
  height: 60px;
  background: var(--grey-600);
}

/* ===== FOCUS ===== */

.focus {
  padding: 96px 0;
}

.section-header {
  margin-bottom: 56px;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
}

.focus-item {
  padding: 36px 32px;
  border-right: 1px solid var(--border);
  transition: background var(--transition);
}

.focus-item:last-child {
  border-right: none;
}

.focus-item:hover {
  background: var(--grey-800);
}

.focus-num {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--grey-600);
  margin-bottom: 20px;
}

.focus-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--white);
  margin-bottom: 12px;
}

.focus-body {
  font-size: 0.8125rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.7;
}

/* ===== LATEST STUDY ===== */

.latest-study {
  padding: 96px 0;
}

.study-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.study-card-left .section-label {
  margin-bottom: 16px;
  display: block;
}

.study-id {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--grey-600);
  margin-bottom: 16px;
}

.study-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.study-excerpt {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 420px;
}

/* TOKEN VISUALIZATION */

.token-viz {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  padding: 40px;
  border: 1px solid var(--border);
  background: var(--grey-800);
}

.token-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.token {
  display: inline-block;
  font-family: 'Courier New', monospace;
  font-size: 0.75rem;
  font-weight: 400;
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  color: var(--grey-400);
  background: transparent;
}

.token--super {
  border-color: var(--grey-400);
  color: var(--white);
  background: var(--black);
}

.token-arrow {
  font-size: 1.125rem;
  color: var(--grey-600);
  padding-left: 4px;
}

/* ===== MATHEO TEASER ===== */

.matheo-teaser {
  padding: 120px 0;
}

.matheo-inner {
  border: 1px solid var(--border);
  padding: 72px 64px;
  max-width: 760px;
}

.matheo-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 20px;
}

.matheo-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: 24px;
}

.matheo-sub {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 480px;
}

/* ===== FOOTER ===== */

.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--grey-600);
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--grey-400);
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--grey-600);
}

/* ===== RESEARCH PAGE ===== */

.research-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - var(--nav-h));
  margin-top: var(--nav-h);
}

.research-sidebar {
  border-right: 1px solid var(--border);
  padding: 48px 0;
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}

.sidebar-label {
  padding: 0 28px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.study-list {
  list-style: none;
  padding: 0;
}

.study-list-item {
  border-bottom: 1px solid var(--border);
}

.study-list-link {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 28px;
  transition: background var(--transition);
}

.study-list-link:hover,
.study-list-link.active {
  background: var(--grey-800);
}

.study-list-link.active {
  border-left: 2px solid var(--white);
  padding-left: 26px;
}

.study-list-num {
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--grey-600);
  flex-shrink: 0;
  margin-top: 2px;
}

.study-list-title {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--grey-200);
  line-height: 1.5;
}

.research-main {
  padding: 64px 80px;
  max-width: 800px;
}

/* ===== STUDY CONTENT PAGE (MD-STYLE) ===== */

.study-content-wrap {
  padding-top: calc(var(--nav-h) + 80px);
  padding-bottom: 120px;
}

.study-back {
  font-size: 0.8125rem;
  color: var(--grey-400);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 56px;
  transition: color var(--transition);
}

.study-back:hover {
  color: var(--white);
}

.study-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
}

.study-meta-id {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--grey-600);
}

.study-meta-sep {
  width: 1px;
  height: 12px;
  background: var(--border-light);
}

.study-meta-date {
  font-size: 0.75rem;
  color: var(--grey-600);
}

.study-page-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 32px;
  max-width: 640px;
}

.study-abstract {
  padding: 24px 28px;
  border-left: 2px solid var(--grey-600);
  margin-bottom: 56px;
}

.study-abstract p {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-200);
  line-height: 1.8;
}

.study-body h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 48px 0 16px;
  color: var(--white);
}

.study-body h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 32px 0 12px;
  color: var(--grey-100);
}

.study-body p {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.85;
  margin-bottom: 20px;
  max-width: 640px;
}

.study-body p strong {
  color: var(--white);
  font-weight: 500;
}

.study-body ul,
.study-body ol {
  padding-left: 20px;
  margin-bottom: 20px;
}

.study-body li {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.8;
  margin-bottom: 8px;
}

.study-body li strong {
  color: var(--grey-100);
  font-weight: 500;
}

.study-body code {
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  background: var(--grey-800);
  padding: 2px 6px;
  border: 1px solid var(--border-light);
  color: var(--grey-200);
}

.study-token-block {
  border: 1px solid var(--border);
  background: var(--grey-800);
  padding: 28px 32px;
  margin: 28px 0;
}

.study-token-block .label {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 14px;
}

.study-token-block .tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.study-token-block .token {
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  padding: 5px 10px;
  border: 1px solid var(--border-light);
  color: var(--grey-400);
}

.study-token-block .token.super {
  border-color: var(--grey-400);
  color: var(--white);
  background: var(--black);
}

.study-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ===== TRY PAGE ===== */

.try-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.try-hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
}

.try-inner {
  max-width: 560px;
}

.try-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 40px;
}

.try-status-dot {
  width: 6px;
  height: 6px;
  background: var(--grey-600);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.try-status-text {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
}

.try-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.0;
  margin-bottom: 28px;
}

.try-sub {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.8;
  margin-bottom: 48px;
}

.try-studies-note {
  border: 1px solid var(--border);
  padding: 24px 28px;
  margin-bottom: 48px;
}

.try-studies-note-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 10px;
}

.try-studies-note p {
  font-size: 0.875rem;
  color: var(--grey-400);
  line-height: 1.7;
}

.try-studies-note p a {
  color: var(--grey-200);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.try-studies-note p a:hover {
  color: var(--white);
}

.try-notify {
  display: flex;
  gap: 0;
}

.try-notify input {
  flex: 1;
  background: var(--grey-800);
  border: 1px solid var(--border-light);
  border-right: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.875rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition);
}

.try-notify input::placeholder {
  color: var(--grey-600);
}

.try-notify input:focus {
  border-color: var(--grey-400);
}

.try-notify button {
  background: var(--white);
  color: var(--black);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 12px 20px;
  border: 1px solid var(--white);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.try-notify button:hover {
  background: transparent;
  color: var(--white);
}

/* ===== RESEARCH INDEX PAGE ===== */

.research-index-hero {
  padding: calc(var(--nav-h) + 80px) 0 72px;
  border-bottom: 1px solid var(--border);
}

.research-index-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
}

.research-index-sub {
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--grey-400);
  line-height: 1.7;
  max-width: 500px;
}

.studies-table {
  padding: 0;
  margin-top: 0;
}

.studies-table-header {
  display: grid;
  grid-template-columns: 80px 1fr 180px 80px;
  gap: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.studies-table-header span {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
  padding: 0 20px;
}

.studies-table-header span:first-child {
  padding-left: 0;
}

.study-row {
  display: grid;
  grid-template-columns: 80px 1fr 180px 80px;
  gap: 0;
  border-bottom: 1px solid var(--border);
  align-items: center;
  transition: background var(--transition);
  text-decoration: none;
  color: inherit;
}

.study-row:hover {
  background: var(--grey-800);
}

.study-row > div {
  padding: 24px 20px;
}

.study-row > div:first-child {
  padding-left: 0;
}

.study-row-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--grey-600);
}

.study-row-title {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--white);
  letter-spacing: -0.005em;
}

.study-row-cat {
  font-size: 0.75rem;
  color: var(--grey-600);
}

.study-row-arrow {
  font-size: 0.9rem;
  color: var(--grey-600);
  text-align: right;
  padding-right: 0;
  transition: color var(--transition), transform var(--transition);
  display: block;
}

.study-row:hover .study-row-arrow {
  color: var(--white);
  transform: translateX(4px);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 1024px) {
  .focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .focus-item:nth-child(2) {
    border-right: none;
  }

  .focus-item:nth-child(1),
  .focus-item:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }

  .study-card {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .studies-table-header,
  .study-row {
    grid-template-columns: 60px 1fr 120px 40px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero {
    padding-top: calc(var(--nav-h) + 64px);
    padding-bottom: 80px;
  }

  .hero-index {
    display: none;
  }

  .focus {
    padding: 64px 0;
  }

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

  .focus-item {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .focus-item:last-child {
    border-bottom: none;
  }

  .latest-study {
    padding: 64px 0;
  }

  .matheo-teaser {
    padding: 64px 0;
  }

  .matheo-inner {
    padding: 40px 28px;
  }

  .research-layout {
    grid-template-columns: 1fr;
  }

  .research-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
  }

  .research-main {
    padding: 40px 24px;
  }

  .studies-table-header {
    display: none;
  }

  .study-row {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
  }

  .study-row-num {
    grid-column: 1;
    grid-row: 1;
    padding-bottom: 4px;
  }

  .study-row-title {
    grid-column: 1;
    grid-row: 2;
    padding-top: 0;
  }

  .study-row-cat {
    display: none;
  }

  .study-row-arrow {
    grid-column: 2;
    grid-row: 1 / 3;
    display: flex;
    align-items: center;
  }

  .token-viz {
    padding: 24px;
  }

  .study-content-wrap {
    padding-top: calc(var(--nav-h) + 40px);
    padding-bottom: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* ===== GLOBAL: FADE-UP ANIMATION ===== */

.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 400ms ease, transform 400ms ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ===== GLOBAL: MOBILE NAV OPEN ===== */

@media (max-width: 768px) {
  .nav-links--open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--black);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    z-index: 99;
  }

  .nav-links--open .nav-link {
    padding: 12px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
    width: 100%;
  }

  .nav-links--open .btn-primary {
    margin-top: 16px;
    width: 100%;
    justify-content: center;
  }
}