/* ==========================================================
   HIMEL SIKDER PORTFOLIO
   Layout idea: one sticky top bar and two colour worlds.
   Cyan = Engineering (blueprint grid). Pink = Creative (film frames).
   Change the colours and fonts in the :root block below.
   ========================================================== */

:root {
  --black: #06080b;
  --panel: #0d1116;
  --panel-2: #141b23;
  --line: #243040;
  --white: #f5f9fb;
  --muted: #a3b3bf;
  --cyan: #1de6f2;
  --cyan-soft: rgba(29, 230, 242, 0.12);
  --pink: #ff3f9e;
  --pink-soft: rgba(255, 63, 158, 0.14);

  /* the accent changes with the page (see .theme-eng and .theme-cre) */
  --accent: #1de6f2;
  --accent-soft: rgba(29, 230, 242, 0.12);

  --font-display: "Unbounded", "Arial Black", Arial, sans-serif;
  --font-body: "Hanken Grotesk", "Segoe UI", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, "Courier New", monospace;

  color-scheme: dark;
}

.theme-eng {
  --accent: #1de6f2;
  --accent-soft: rgba(29, 230, 242, 0.12);
}

.theme-cre {
  --accent: #ff3f9e;
  --accent-soft: rgba(255, 63, 158, 0.14);
}

/* ---------- basics ---------- */

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* paints the phone status bar area so nothing scrolls under it */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  background: var(--black);
  z-index: 60;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

section[id] {
  scroll-margin-top: 90px;
}

.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* ---------- top bar ---------- */

.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  background: rgba(6, 8, 11, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--cyan), var(--pink));
  color: var(--black);
  font-size: 0.78rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

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

.nav a[data-color="cyan"]:hover {
  color: var(--cyan);
}

.nav a[data-color="pink"]:hover {
  color: var(--pink);
}

.nav a.active {
  background: var(--white);
  color: var(--black);
}

.nav a.active[data-color="cyan"] {
  background: var(--cyan);
  color: var(--black);
}

.nav a.active[data-color="pink"] {
  background: var(--pink);
  color: var(--black);
}

/* ---------- buttons ---------- */

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 2px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: var(--black);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-cyan {
  --accent: var(--cyan);
}

.btn-pink {
  --accent: var(--pink);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--white);
}

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

/* ---------- headings and text ---------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead {
  max-width: 60ch;
  margin-top: 20px;
  color: var(--muted);
  font-size: 1.1rem;
}

.section {
  padding-block: 56px;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 4.2vw, 2.25rem);
}

.section-head p {
  max-width: 62ch;
  color: var(--muted);
}

.sample-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
}

.page-hero {
  padding-block: 52px 16px;
}

.page-hero h1 {
  margin-top: 10px;
  font-size: clamp(2.2rem, 8vw, 4.2rem);
  font-weight: 700;
}

.sub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.sub-nav a {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
}

.sub-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- home hero ---------- */

.hero {
  padding-block: 56px 40px;
}

.hero h1 {
  margin-top: 14px;
  font-size: clamp(2.2rem, 8vw, 5rem);
  font-weight: 700;
}

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

.hero .p {
  color: var(--pink);
}

/* ---------- the two doors on the home page ---------- */

.doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-bottom: 56px;
}

.door {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background-color: var(--panel);
  color: var(--white);
  text-decoration: none;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.door:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.door-eng {
  --accent: var(--cyan);
  background-image:
    linear-gradient(var(--cyan-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan-soft) 1px, transparent 1px);
  background-size: 28px 28px;
}

.door-cre {
  --accent: var(--pink);
  background-image: radial-gradient(circle at 85% 8%, var(--pink-soft), transparent 55%);
}

.door-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.door h2 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
}

.door p {
  max-width: 40ch;
  color: var(--muted);
}

.door-art {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-block: 6px;
}

.door-more {
  margin-top: auto;
  color: var(--accent);
  font-weight: 700;
}

.svg-box {
  fill: rgba(6, 8, 11, 0.75);
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.svg-line {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.svg-arrow {
  fill: var(--cyan);
}

.svg-text {
  fill: var(--white);
  font-family: var(--font-mono);
  font-size: 11px;
}

.svg-muted {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.svg-time {
  fill: var(--pink);
  font-family: var(--font-mono);
  font-size: 10px;
}

.film-frame {
  fill: var(--pink-soft);
  stroke: var(--pink);
  stroke-width: 1.5;
}

.fill-pink {
  fill: var(--pink);
}

.fill-cyan {
  fill: var(--cyan);
}

.fill-white {
  fill: var(--white);
}

.audio-bar {
  fill: var(--pink-soft);
  stroke: var(--pink);
  stroke-width: 1;
}

.playhead {
  stroke: var(--white);
  stroke-width: 2;
}

/* ---------- tags ---------- */

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

.tags li {
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

/* ---------- skills ---------- */

.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.skill-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.skill-box h3 {
  color: var(--cyan);
  font-size: 0.95rem;
}

.skill-box .tags li {
  color: var(--white);
}

/* ---------- project cards ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.filter-btn {
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
}

.filter-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.filter-btn.active {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--black);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.2s;
}

.project-card:hover {
  border-color: var(--cyan);
}

.cover {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  max-width: 100%;
  border-bottom: 1px solid var(--line);
  background-color: var(--panel-2);
  background-size: auto, 24px 24px, 24px 24px;
}

.cover-hardware {
  background-image:
    radial-gradient(circle at 80% 20%, rgba(29, 230, 242, 0.3), transparent 50%),
    linear-gradient(var(--cyan-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan-soft) 1px, transparent 1px);
}

.cover-sim {
  background-image:
    radial-gradient(circle at 18% 85%, rgba(255, 63, 158, 0.25), transparent 50%),
    linear-gradient(var(--cyan-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan-soft) 1px, transparent 1px);
}

.cover-lab {
  background-image:
    linear-gradient(180deg, transparent 55%, rgba(29, 230, 242, 0.22)),
    linear-gradient(var(--cyan-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan-soft) 1px, transparent 1px);
}

.cover-main {
  padding-inline: 12px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-align: center;
}

.cover-note {
  position: absolute;
  left: 12px;
  bottom: 9px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
}

.card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
}

.card-type {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.card-body h3 {
  font-size: 1.12rem;
}

.card-body > p:not(.card-type) {
  color: var(--muted);
  font-size: 0.95rem;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: auto;
  padding-top: 4px;
  font-size: 0.9rem;
  font-weight: 700;
}

.card-links a {
  color: var(--cyan);
  text-decoration: none;
}

.card-links a:hover {
  text-decoration: underline;
}

.more-link {
  display: inline-block;
  margin-top: 24px;
  color: var(--cyan);
  font-weight: 700;
  text-decoration: none;
}

.more-link:hover {
  text-decoration: underline;
}

/* ---------- "working on now" strip ---------- */

.now-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.now-strip .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px var(--cyan-soft);
}

.now-strip .label {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.now-strip p {
  flex: 1;
  min-width: 240px;
  color: var(--muted);
}

/* ---------- creative: designs ---------- */

.masonry {
  columns: 3 240px;
  column-gap: 16px;
}

.tile {
  break-inside: avoid;
  margin: 0 0 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
}

.tile-art {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
}

.r-tall {
  aspect-ratio: 4 / 5;
}

.r-square {
  aspect-ratio: 1 / 1;
}

.r-wide {
  aspect-ratio: 16 / 10;
}

.r-slim {
  aspect-ratio: 3 / 4;
}

.art-a {
  background: linear-gradient(145deg, var(--pink) 0%, #6b1048 55%, var(--black) 100%);
}

.art-b {
  background:
    radial-gradient(circle at 72% 28%, var(--cyan) 0 14%, transparent 15%),
    linear-gradient(180deg, var(--panel-2), var(--black));
}

.art-c {
  background: conic-gradient(from 210deg at 35% 65%, var(--pink), var(--black) 35%, var(--cyan) 65%, var(--pink));
}

.art-d {
  background: repeating-linear-gradient(135deg, var(--white) 0 14px, var(--black) 14px 28px);
}

.art-e {
  background: linear-gradient(180deg, var(--black) 0%, #04555b 60%, var(--cyan) 100%);
}

.art-f {
  background:
    radial-gradient(circle at 30% 30%, var(--pink) 0 18%, transparent 19%),
    radial-gradient(circle at 70% 70%, var(--cyan) 0 22%, transparent 23%),
    var(--panel-2);
}

.tile-note {
  position: absolute;
  left: 12px;
  bottom: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(6, 8, 11, 0.78);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.66rem;
}

.tile figcaption {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px 14px;
}

.tile .kind {
  color: var(--pink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tile .brief {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- creative: videos ---------- */

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 22px;
}

.video-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.video-frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.v-a {
  background: linear-gradient(120deg, #3a0c27, var(--black) 55%, #043a40);
}

.v-b {
  background: linear-gradient(60deg, #043a40, var(--black) 50%, #3a0c27);
}

.v-c {
  background: radial-gradient(circle at 50% 120%, #7a1f55, var(--black) 65%);
}

.play {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: var(--pink);
}

.play::before {
  content: "";
  margin-left: 5px;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-left: 18px solid var(--black);
}

.timecode {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(6, 8, 11, 0.8);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.video-card h3 {
  font-size: 1.05rem;
}

.video-card p {
  color: var(--muted);
  font-size: 0.93rem;
}

.video-card .tags li {
  border-color: var(--line);
}

/* ---------- creative: timeline and achievements ---------- */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-left: 22px;
  border-left: 2px solid var(--line);
}

.timeline li {
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 0 4px var(--pink-soft);
}

.timeline .year {
  color: var(--pink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.timeline h3 {
  margin-top: 4px;
  font-size: 1.05rem;
}

.timeline p {
  max-width: 62ch;
  margin-top: 4px;
  color: var(--muted);
}

.sub-title {
  margin: 48px 0 20px;
  font-size: 1.3rem;
}

.award-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.award {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    radial-gradient(circle at 100% 0%, var(--pink-soft), transparent 55%),
    var(--panel);
}

.award .year {
  color: var(--pink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.award h3 {
  font-size: 1.05rem;
}

.award p {
  color: var(--muted);
  font-size: 0.93rem;
}

/* ---------- about ---------- */

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  gap: 48px;
  align-items: start;
}

.photo {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4 / 5;
  border: 2px solid transparent;
  border-radius: 22px;
  background:
    linear-gradient(var(--panel), var(--panel)) padding-box,
    linear-gradient(135deg, var(--cyan), var(--pink)) border-box;
  text-align: center;
}

.photo strong {
  font-family: var(--font-display);
  font-size: 3.4rem;
  color: var(--cyan);
}

.photo span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.story {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 62ch;
  font-size: 1.05rem;
}

.story h2 {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
}

.story p {
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.info-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.info-box h3 {
  color: var(--cyan);
  font-size: 0.95rem;
}

.info-box p {
  color: var(--muted);
}

.info-box .bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--muted);
}

.info-box .bullets li::before {
  content: "→ ";
  color: var(--pink);
}

/* ---------- contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}

a.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.contact-card.c-cyan {
  --accent: var(--cyan);
}

.contact-card.c-pink {
  --accent: var(--pink);
}

.contact-card .label {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contact-card .value {
  font-weight: 700;
  overflow-wrap: anywhere;
}

.contact-card .small {
  color: var(--muted);
  font-size: 0.9rem;
}

.copy-btn {
  align-self: flex-start;
  margin-top: 6px;
  padding: 8px 16px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: transparent;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--accent);
  color: var(--black);
}

/* ---------- footer ---------- */

.site-footer {
  margin-top: 24px;
  padding-block: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
}

.footer-row a {
  text-decoration: none;
}

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

/* ---------- small screens ---------- */

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

  .two-col {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .nav a {
    padding: 7px 10px;
    font-size: 0.85rem;
  }

  .section {
    padding-block: 44px;
  }

  .door {
    padding: 20px;
  }
}

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

  html {
    scroll-behavior: auto;
  }
}