/* ==========================================================================
   RATISH KUMAR — Personal Site
   Design language: editorial, typography-led, navy / cream / accent blue.
   ========================================================================== */

/* ----- DESIGN TOKENS ----- */
:root {
  --cream: #F7F4ED;
  --cream-deep: #EEE9DC;
  --navy: #1A2440;
  --navy-deep: #0B1428;
  --ink: #161616;
  --ink-soft: #5A5A5A;
  --ink-faint: #8A8A8A;
  --accent: #2E5BBA;
  --accent-deep: #1F4A9F;
  --hairline: rgba(26, 36, 64, 0.14);
  --hairline-strong: rgba(26, 36, 64, 0.28);

  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-editorial: 'IBM Plex Serif', 'Georgia', serif;

  --max-width: 1180px;
  --measure: 65ch;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--accent-deep);
}

::selection {
  background: var(--navy);
  color: var(--cream);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
}

/* ----- TYPOGRAPHY ----- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.015em;
  margin: 0;
}

p {
  margin: 0 0 1.1em;
  max-width: var(--measure);
}

em {
  font-style: italic;
}

.eyebrow,
.section-eyebrow {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-3);
  display: inline-block;
}

.section-eyebrow-light {
  color: rgba(247, 244, 237, 0.7);
}

/* ----- NAVIGATION ----- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 244, 237, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.1rem clamp(1.5rem, 5vw, 3rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.nav-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.nav-name:hover {
  color: var(--navy);
}

.nav-links {
  display: flex;
  gap: clamp(1.2rem, 3vw, 2.4rem);
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ----- HERO ----- */
.hero {
  padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem);
  border-bottom: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 70% 30%, rgba(46, 91, 186, 0.04), transparent 60%);
  pointer-events: none;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 11vw, 8.5rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.035em;
  margin: 0 0 var(--space-5);
  color: var(--navy);
  font-variation-settings: "opsz" 144;
}

.hero-title-accent {
  font-style: italic;
  font-weight: 300;
  color: var(--ink);
}

.hero-lede {
  font-family: var(--font-editorial);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.55;
  color: var(--ink);
  max-width: 38rem;
  margin: 0 0 var(--space-4);
  font-weight: 400;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  margin-top: var(--space-5);
}

.meta-divider {
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--hairline-strong);
}

/* ----- SECTIONS ----- */
.section {
  padding: clamp(4rem, 10vw, 7rem) 0;
  border-bottom: 1px solid var(--hairline);
}

.section-alt {
  background: var(--cream-deep);
}

.section-dark {
  background: var(--navy-deep);
  color: var(--cream);
}

.section-header {
  max-width: 44rem;
  margin: 0 0 var(--space-6);
}

.section-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  font-weight: 400;
  letter-spacing: -0.022em;
  margin-bottom: var(--space-3);
  color: var(--navy);
}

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

.section-intro {
  font-family: var(--font-editorial);
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.section-intro-light {
  color: rgba(247, 244, 237, 0.75);
}

/* ----- WORKS (Writing section) ----- */
.work {
  max-width: 44rem;
  margin: var(--space-6) auto;
}

.work-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.status {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 2px;
}

.status-forthcoming {
  background: rgba(46, 91, 186, 0.1);
  color: var(--accent-deep);
}

.status-paper {
  background: rgba(26, 36, 64, 0.1);
  color: var(--navy);
}

.work-type {
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

.work-title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  color: var(--navy);
}

.work-title em {
  font-style: italic;
  font-weight: 400;
}

.work-subtitle {
  font-family: var(--font-editorial);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin-bottom: var(--space-5);
  max-width: 100%;
}

.work-body {
  font-family: var(--font-editorial);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
}

.work-body .lead {
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--navy);
  font-weight: 400;
  border-left: 2px solid var(--accent);
  padding-left: 1.2rem;
  margin-left: -1.4rem;
  margin-bottom: var(--space-4);
}

.work-status {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--hairline);
  padding-top: var(--space-3);
  margin-top: var(--space-5);
  font-style: italic;
}

.work-disclosure {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-top: var(--space-3);
  letter-spacing: 0.01em;
}

.framework-figure {
  margin: var(--space-5) 0 var(--space-4);
}

.framework-figure img {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  box-shadow:
    0 1px 2px rgba(11, 20, 40, 0.06),
    0 8px 32px rgba(11, 20, 40, 0.08);
  border-radius: 4px;
}

.framework-figure figcaption {
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
  margin-top: var(--space-3);
  font-style: italic;
}

.work-divider {
  max-width: 44rem;
  margin: var(--space-7) auto;
  height: 1px;
  background: var(--hairline);
  position: relative;
}

.work-divider::before {
  content: '§';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--cream);
  padding: 0 1rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent);
}

/* ----- ABOUT ----- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16rem;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about-main {
  font-family: var(--font-editorial);
  font-size: 1.05rem;
  line-height: 1.7;
}

.about-main .lead {
  font-size: 1.2rem;
  color: var(--navy);
  margin-bottom: var(--space-4);
}

.about-facts {
  border-left: 1px solid var(--hairline-strong);
  padding-left: var(--space-4);
  position: sticky;
  top: 5rem;
}

.facts-heading {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-3);
}

.facts-list {
  margin: 0;
  font-size: 0.92rem;
}

.facts-list dt {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-3);
}

.facts-list dt:first-child {
  margin-top: 0;
}

.facts-list dd {
  margin: 0.3rem 0 0;
  color: var(--ink);
  line-height: 1.5;
}

/* ----- ENGAGEMENTS ----- */
.engagements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.engagement-card {
  background: var(--cream);
  padding: var(--space-4) var(--space-4) var(--space-5);
  border-radius: 4px;
  border-top: 3px solid var(--accent);
  box-shadow: 0 1px 2px rgba(11, 20, 40, 0.04);
}

.engagement-card h3 {
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--navy);
}

.engagement-card p {
  font-family: var(--font-editorial);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
}

.engagement-note {
  font-family: var(--font-editorial);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-top: var(--space-5);
  max-width: 100%;
}

/* ----- CONTACT ----- */
.contact-block {
  text-align: left;
  margin-top: var(--space-5);
}

.contact-link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 400;
  font-style: italic;
  color: var(--cream);
  text-decoration: none;
  letter-spacing: -0.015em;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid rgba(247, 244, 237, 0.25);
  transition: all 0.3s var(--ease);
}

.contact-link:hover {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

.contact-note {
  font-size: 0.8rem;
  color: rgba(247, 244, 237, 0.45);
  margin-top: var(--space-3);
  font-style: italic;
}

.contact-secondary {
  margin-top: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: rgba(247, 244, 237, 0.7);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.contact-secondary a {
  color: rgba(247, 244, 237, 0.85);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease);
}

.contact-secondary a:hover {
  color: var(--cream);
  border-bottom-color: rgba(247, 244, 237, 0.5);
}

.contact-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: rgba(247, 244, 237, 0.75);
  border-radius: 4px;
  border: 1px solid rgba(247, 244, 237, 0.15);
  border-bottom: 1px solid rgba(247, 244, 237, 0.15);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.contact-icon-link:hover {
  color: var(--cream);
  border-color: rgba(247, 244, 237, 0.4);
  background-color: rgba(247, 244, 237, 0.04);
  border-bottom-color: rgba(247, 244, 237, 0.4);
}

.contact-icon-link svg {
  display: block;
}

.section-dark .meta-divider {
  background: rgba(247, 244, 237, 0.3);
}

/* ----- FOOTER ----- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(247, 244, 237, 0.6);
  padding: var(--space-4) 0;
  font-size: 0.82rem;
  border-top: 1px solid rgba(247, 244, 237, 0.1);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-meta {
  font-style: italic;
  margin: 0;
}

.site-footer p {
  margin: 0;
}

/* ----- REVEAL ANIMATION ----- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html { scroll-behavior: auto; }
}

/* ----- RESPONSIVE ----- */
@media (max-width: 760px) {
  .nav-links {
    gap: 1rem;
  }
  .nav-links a {
    font-size: 0.82rem;
  }

  .hero {
    padding: 5rem 0 3.5rem;
  }

  .hero-title {
    font-size: clamp(3rem, 14vw, 5rem);
  }

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

  .about-facts {
    border-left: none;
    border-top: 1px solid var(--hairline-strong);
    padding-left: 0;
    padding-top: var(--space-4);
    position: static;
  }

  .work-body .lead {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.8rem 1.5rem;
    gap: 0.5rem;
  }
  .nav-links {
    width: 100%;
    justify-content: flex-start;
  }
}