/**
* Tejus Paturu — Portfolio
* Dark glassmorphism design system with sci-fi HUD accents.
* Fonts: Space Grotesk (display) · Inter (body) · JetBrains Mono (labels/data)
*/

/*--------------------------------------------------------------
# Design tokens
--------------------------------------------------------------*/
:root {
  /* Surfaces */
  --bg-0: #05060f;
  --bg-1: #0a0e1e;
  --bg-2: #101530;
  --glass: rgba(255, 255, 255, 0.05);
  --glass-strong: rgba(255, 255, 255, 0.08);
  --stroke: rgba(255, 255, 255, 0.1);
  --stroke-soft: rgba(255, 255, 255, 0.06);

  /* Text — blue-biased neutrals */
  --text-hi: #e8ecf8;
  --text-mid: #a3adcc;
  --text-lo: #67708f;

  /* Accents */
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --grad-accent: linear-gradient(120deg, #22d3ee 0%, #8b5cf6 100%);
  --grad-text: linear-gradient(92deg, #e8ecf8 0%, #22d3ee 55%, #8b5cf6 100%);
  --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.22);
  --glow-violet: 0 0 28px rgba(139, 92, 246, 0.22);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);

  /* Type */
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  /* Layout */
  --container: 1280px;
  --nav-h: 72px;
  --radius-1: 10px;
  --radius-2: 16px;
  --radius-3: 24px;
  --sec-pad: clamp(72px, 9vw, 120px);
  --blur: 16px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 180ms;
  --t-med: 320ms;
}

/*--------------------------------------------------------------
# Base
--------------------------------------------------------------*/
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg-0);
  color: var(--text-mid);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  color: var(--text-hi);
  line-height: 1.2;
  margin: 0 0 12px 0;
  text-wrap: balance;
}

p {
  margin: 0 0 16px 0;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

a:hover {
  color: #6ee4f5;
}

img {
  display: block;
}

ul {
  margin: 0;
  padding: 0;
}

strong {
  color: var(--text-hi);
  font-weight: 600;
}

::selection {
  background: rgba(139, 92, 246, 0.35);
  color: var(--text-hi);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-0);
}

::-webkit-scrollbar-thumb {
  background: #1d2440;
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: #2a3357;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/*--------------------------------------------------------------
# Background FX — aurora orbs + HUD grid
--------------------------------------------------------------*/
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-fx::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 75%);
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  will-change: transform;
}

.bg-orb--cyan {
  width: 640px;
  height: 640px;
  top: -12%;
  left: -10%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.16) 0%, transparent 65%);
  animation: orb-drift-a 26s var(--ease) infinite alternate;
}

.bg-orb--violet {
  width: 720px;
  height: 720px;
  bottom: -18%;
  right: -12%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.14) 0%, transparent 65%);
  animation: orb-drift-b 34s var(--ease) infinite alternate;
}

@keyframes orb-drift-a {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(7vw, 9vh) scale(1.15); }
}

@keyframes orb-drift-b {
  from { transform: translate(0, 0) scale(1.1); }
  to { transform: translate(-6vw, -10vh) scale(0.95); }
}

/*--------------------------------------------------------------
# Utilities
--------------------------------------------------------------*/
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

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

/* Glass recipe — applied per component */
.glass,
.about-card,
.tech-category,
.resume-intro,
.resume-panel,
.projects-shell,
.paper-card,
.contact-shell {
  background: var(--glass);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-2);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass,
  .about-card,
  .tech-category,
  .resume-intro,
  .resume-panel,
  .projects-shell,
  .paper-card,
  .contact-shell,
  .project-spotlight,
  .contact-card {
    background: var(--bg-1);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-med) var(--ease),
    border-color var(--t-med) var(--ease), background-color var(--t-med) var(--ease);
}

.btn-fill {
  background: var(--grad-accent);
  color: var(--bg-0);
}

.btn-fill:hover {
  color: var(--bg-0);
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan), 0 8px 24px rgba(34, 211, 238, 0.25);
}

.btn-outline {
  background: var(--glass);
  border: 1px solid var(--stroke);
  color: var(--text-hi);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.btn-outline:hover {
  color: var(--text-hi);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

/*--------------------------------------------------------------
# Section shell
--------------------------------------------------------------*/
section {
  padding: var(--sec-pad) 0;
  position: relative;
}

.section-title {
  margin-bottom: 48px;
}

.section-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title h2 {
  font-size: clamp(32px, 4.5vw, 44px);
  font-weight: 700;
  margin-bottom: 14px;
}

.section-title h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 14px;
  border-radius: 2px;
  background: var(--grad-accent);
  box-shadow: var(--glow-cyan);
}

.section-title p {
  color: var(--text-mid);
  max-width: 640px;
  margin-bottom: 0;
}

/*--------------------------------------------------------------
# Top navigation
--------------------------------------------------------------*/
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: height var(--t-med) var(--ease);
}

/* Glass layer lives on a pseudo-element so the fixed-position
   mobile overlay is not trapped by backdrop-filter's containing block */
.topnav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(5, 6, 15, 0);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  transition: background var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}

.topnav.scrolled::before {
  background: rgba(5, 6, 15, 0.65);
  border-bottom-color: var(--stroke-soft);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.topnav-inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-hi);
  margin-right: auto;
  white-space: nowrap;
}

.brand:hover {
  color: var(--text-hi);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--grad-accent);
  color: var(--bg-0);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--glow-cyan);
}

.nav-menu ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-menu a {
  position: relative;
  display: inline-block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-mid);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-accent);
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.nav-menu a:hover {
  color: var(--text-hi);
}

.nav-menu li.active a {
  color: var(--cyan);
}

.nav-menu li.active a::after {
  opacity: 1;
  transform: scaleX(1);
  box-shadow: var(--glow-cyan);
}

.nav-social {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: var(--text-mid);
  font-size: 18px;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

.nav-social a:hover {
  color: var(--cyan);
  background: var(--glass);
  box-shadow: var(--glow-cyan);
}

.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--stroke);
  border-radius: 10px;
  background: var(--glass);
  color: var(--text-hi);
  font-size: 22px;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-med) var(--ease);
}

.mobile-nav-toggle:hover {
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: var(--glow-cyan);
}

/*--------------------------------------------------------------
# Hero
--------------------------------------------------------------*/
#hero {
  min-height: 100vh;
  padding: calc(var(--nav-h) + 40px) 0 40px;
  display: grid;
  place-items: center;
  text-align: center;
}

.hero-container {
  position: relative;
  padding-inline: 24px;
  max-width: 900px;
}

.hero-container::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(720px, 90vw);
  height: 420px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.08) 0%, rgba(139, 92, 246, 0.06) 45%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: var(--glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 28px;
}

.hero-chip::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.9);
}

.hero-name {
  font-size: clamp(48px, 9vw, 96px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-typed {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.4vw, 20px);
  color: var(--text-mid);
  margin-bottom: 40px;
}

.hero-typed .typed {
  color: var(--cyan);
}

.typed-cursor {
  color: var(--cyan);
  font-weight: 400;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--stroke);
  border-radius: 50%;
  background: var(--glass);
  color: var(--text-mid);
  font-size: 22px;
  animation: hero-float 2.4s ease-in-out infinite;
}

.hero-scroll:hover {
  color: var(--cyan);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: var(--glow-cyan);
}

@keyframes hero-float {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/*--------------------------------------------------------------
# About
--------------------------------------------------------------*/
.about-card {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 56px;
  padding: 48px;
  border-radius: var(--radius-3);
  box-shadow: var(--shadow-card);
}

.about-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  /* Subject stands right of center in the source photo; keep him centered in the crop */
  object-position: 70% 40%;
  border-radius: var(--radius-2);
  border: 1px solid var(--stroke);
}

.about-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 10px;
}

.about-header h3 {
  font-size: clamp(22px, 3vw, 28px);
  margin-bottom: 12px;
}

.about-lead {
  color: var(--text-mid);
}

.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 24px 0;
}

.about-fact {
  padding: 14px 18px;
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-1);
}

.about-fact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-lo);
  margin-bottom: 4px;
}

.about-fact strong {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
  display: block;
}

.about-story p {
  font-size: 15px;
  line-height: 1.8;
}

.about-cta {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 0;
}

/*--------------------------------------------------------------
# Tech stack
--------------------------------------------------------------*/
.tech-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tech-category {
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.category-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
}

.category-title i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid var(--stroke);
  color: var(--cyan);
  font-size: 20px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 12px;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 8px;
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-1);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

.tech-item:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: var(--glow-cyan);
}

.tech-item img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  padding: 4px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 8px;
}

.tech-item span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-mid);
  text-align: center;
}

/*--------------------------------------------------------------
# Resume
--------------------------------------------------------------*/
.resume-shell {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
  align-items: start;
}

.resume-column {
  display: grid;
  gap: 24px;
}

.resume-intro {
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.resume-kicker,
.resume-panel-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 8px;
}

.resume-intro h3 {
  font-size: 21px;
  margin-bottom: 12px;
}

.resume-intro > p {
  font-size: 15px;
}

.resume-highlights {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.resume-highlight {
  padding: 14px 18px;
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-1);
}

.resume-highlight strong {
  display: block;
  font-family: var(--font-head);
  font-size: 15px;
  margin-bottom: 2px;
}

.resume-highlight span {
  font-size: 13.5px;
  color: var(--text-mid);
}

.resume-panel {
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.resume-panel-header {
  margin-bottom: 24px;
}

.resume-panel-header h3 {
  font-size: 21px;
  margin-bottom: 0;
}

.resume-card {
  position: relative;
  padding: 20px 0;
  border-top: 1px solid var(--stroke-soft);
}

.resume-card:last-child {
  padding-bottom: 0;
}

.resume-card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.resume-date {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.resume-location {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-lo);
}

.resume-card h4 {
  font-size: 17px;
  margin-bottom: 2px;
}

.resume-org {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 10px;
}

.resume-metric {
  font-size: 14px;
  margin-bottom: 10px;
}

.resume-points {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-bottom: 0;
}

.resume-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
}

.resume-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--grad-accent);
}

.resume-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.resume-tags span,
.project-stack span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  color: var(--text-mid);
}

/* Experience timeline */
.resume-panel--timeline .resume-card {
  border-top: none;
  padding: 0 0 28px 26px;
}

.resume-panel--timeline .resume-card:last-child {
  padding-bottom: 0;
}

.resume-panel--timeline .resume-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: -10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  opacity: 0.45;
}

.resume-panel--timeline .resume-card:last-child::before {
  bottom: auto;
  height: calc(100% - 10px);
}

.resume-panel--timeline .resume-card::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.75);
}

/*--------------------------------------------------------------
# Projects
--------------------------------------------------------------*/
.projects-shell {
  padding: 36px;
  border-radius: var(--radius-3);
  box-shadow: var(--shadow-card);
}

.projects-shell-header {
  margin-bottom: 28px;
}

.projects-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 8px;
}

.projects-shell-header h3 {
  font-size: 21px;
  max-width: 560px;
  margin-bottom: 0;
}

.project-stage {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-spotlight {
  --card-accent: var(--cyan);
  --card-accent-soft: rgba(34, 211, 238, 0.14);
  display: flex;
  flex-direction: column;
  background: var(--glass);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-2);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  overflow: hidden;
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

.project-spotlight:hover {
  transform: translateY(-6px);
  border-color: var(--card-accent);
  box-shadow: 0 0 28px var(--card-accent-soft), var(--shadow-card);
}

.project-spotlight--trainer { --card-accent: #22d3ee; --card-accent-soft: rgba(34, 211, 238, 0.16); }
.project-spotlight--pantry { --card-accent: #34d399; --card-accent-soft: rgba(52, 211, 153, 0.16); }
.project-spotlight--refactor { --card-accent: #8b5cf6; --card-accent-soft: rgba(139, 92, 246, 0.16); }
.project-spotlight--rag { --card-accent: #f472b6; --card-accent-soft: rgba(244, 114, 182, 0.16); }
.project-spotlight--music { --card-accent: #fbbf24; --card-accent-soft: rgba(251, 191, 36, 0.16); }

.project-topline {
  padding: 16px 20px 0;
}

.project-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--card-accent);
  background: var(--card-accent-soft);
  border: 1px solid var(--card-accent-soft);
}

.project-media {
  position: relative;
  margin: 14px 20px 0;
  border-radius: var(--radius-1);
  overflow: hidden;
  border: 1px solid var(--stroke-soft);
}

.project-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform var(--t-med) var(--ease);
}

.project-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(5, 6, 15, 0.72) 100%);
}

.project-spotlight:hover .project-media img {
  transform: scale(1.045);
}

.project-body {
  padding: 18px 20px 0;
  flex-grow: 1;
}

.project-body h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.project-body p {
  font-size: 14px;
  margin-bottom: 0;
}

.project-footer {
  padding: 16px 20px 20px;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 14px;
}

.project-actions a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--glass);
  color: var(--text-hi);
  transition: border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}

.project-actions a::after {
  content: "→";
  transition: transform var(--t-fast) var(--ease);
}

.project-actions a:hover {
  border-color: var(--card-accent);
  box-shadow: 0 0 18px var(--card-accent-soft);
}

.project-actions a:hover::after {
  transform: translateX(3px);
}

/*--------------------------------------------------------------
# Papers
--------------------------------------------------------------*/
.papers-list {
  display: grid;
  gap: 16px;
}

.paper-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 28px;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

.paper-card:hover {
  transform: translateY(-3px);
  border-color: rgba(139, 92, 246, 0.45);
  box-shadow: var(--glow-violet);
}

.paper-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.paper-venue {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--violet);
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.paper-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--bg-0);
  background: var(--grad-accent);
  box-shadow: var(--glow-cyan);
}

.paper-copy h3 {
  font-size: 16.5px;
  font-weight: 600;
  margin-bottom: 0;
  line-height: 1.45;
}

.paper-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 500;
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--glass);
  color: var(--text-hi);
  white-space: nowrap;
  transition: border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}

.paper-link:hover {
  color: var(--text-hi);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: var(--glow-cyan);
}

/*--------------------------------------------------------------
# Contact
--------------------------------------------------------------*/
.contact-shell {
  position: relative;
  padding: 40px;
  border-radius: var(--radius-3);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.contact-shell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--grad-accent);
  opacity: 0.6;
}

.contact-layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 36px;
  align-items: start;
}

.contact-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 10px;
}

.contact-intro h3 {
  font-size: clamp(22px, 3vw, 26px);
  margin-bottom: 12px;
}

.contact-intro p {
  font-size: 15px;
}

.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.contact-cta {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border-radius: 999px;
  background: var(--grad-accent);
  color: var(--bg-0);
  font-family: var(--font-head);
  font-size: 14.5px;
  font-weight: 500;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-med) var(--ease);
}

.contact-cta:hover {
  color: var(--bg-0);
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan), 0 8px 24px rgba(34, 211, 238, 0.25);
}

.contact-secondary {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--glass);
  color: var(--text-hi);
  font-family: var(--font-head);
  font-size: 14.5px;
  font-weight: 500;
  transition: border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease),
    transform var(--t-fast) var(--ease);
}

.contact-secondary:hover {
  color: var(--text-hi);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.contact-card {
  display: block;
  padding: 20px;
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-1);
  color: var(--text-mid);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

a.contact-card:hover {
  color: var(--text-mid);
  transform: translateY(-3px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: var(--glow-cyan);
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid var(--stroke);
  color: var(--cyan);
  font-size: 20px;
  margin-bottom: 12px;
}

.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-lo);
  margin-bottom: 4px;
}

.contact-card strong {
  font-size: 14px;
  font-weight: 500;
  word-break: break-word;
}

/*--------------------------------------------------------------
# Footer & back-to-top
--------------------------------------------------------------*/
#footer {
  border-top: 1px solid var(--stroke-soft);
  padding: 30px 0;
  text-align: center;
}

#footer .credits {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-lo);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  background: rgba(10, 14, 30, 0.8);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  color: var(--text-hi);
  font-size: 22px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease), visibility var(--t-med);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

/*--------------------------------------------------------------
# Responsive
--------------------------------------------------------------*/
@media (max-width: 1100px) {
  .project-stage {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .nav-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(5, 6, 15, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }

  body.mobile-nav-active .nav-menu {
    display: grid;
    place-items: center;
  }

  body.mobile-nav-active {
    overflow: hidden;
  }

  .nav-menu ul {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .nav-menu a {
    font-family: var(--font-head);
    font-size: 24px;
    font-weight: 600;
    padding: 10px 20px;
    color: var(--text-hi);
  }

  .nav-menu a::after {
    left: 20px;
    right: 20px;
  }

  .nav-social {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 101;
  }

  .about-card {
    grid-template-columns: 1fr;
    padding: 28px;
  }

  .about-media img {
    min-height: 0;
    max-height: 360px;
  }

  .tech-categories {
    grid-template-columns: 1fr;
  }

  .resume-shell {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .paper-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .projects-shell {
    padding: 24px;
  }

  .contact-shell {
    padding: 28px;
  }
}

@media (max-width: 700px) {
  .project-stage {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .about-facts {
    grid-template-columns: 1fr;
  }

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

  .brand span.brand-text {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: 20px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-scroll {
    display: none;
  }

  .about-card,
  .resume-intro,
  .resume-panel {
    padding: 22px;
  }
}

/*--------------------------------------------------------------
# Reduced motion
--------------------------------------------------------------*/
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}