/* ============================================================
   Saad - Portfolio
   Clean professional dark theme. Coding identity via content,
   not chrome.
   ============================================================ */

:root {
  /* surfaces */
  --bg:        #0a0d12;
  --bg-soft:   #0f1320;
  --surface:   #131826;
  --surface-2: #1a2030;
  --border:    #232b3d;
  --border-2:  #2b3448;

  /* text */
  --fg:        #e8ecf3;
  --fg-soft:   #b8c0ce;
  --fg-mute:   #7f8a9d;

  /* accents */
  --accent:    #7c9cff;            /* primary link/accent */
  --accent-2:  #5eead4;            /* mint/teal secondary */
  --accent-3:  #c4b5fd;            /* violet */
  --grad: linear-gradient(135deg, #7c9cff 0%, #5eead4 55%, #c4b5fd 100%);

  --green:     #34d399;
  --yellow:    #f5c451;
  --red:       #f87171;

  /* code tokens */
  --k:   #ff7b9c;
  --s:   #a6d8ff;
  --n:   #ffb86c;
  --c:   #ffd580;
  --fn:  #c4a8ff;
  --v:   #e8ecf3;
  --cm:  #6b7689;
  --b:   #7dd3fc;

  --mono: 'JetBrains Mono', 'Fira Code', Consolas, ui-monospace, monospace;
  --sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  --radius:   14px;
  --radius-sm: 8px;
  --shadow-lg: 0 30px 80px rgba(0,0,0,0.55), 0 2px 6px rgba(0,0,0,0.3);
  --shadow:    0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* subtle ambient background */
body::before {
  content: "";
  position: fixed; inset: 0;
  background:
    radial-gradient(900px 600px at 10% -10%, rgba(124,156,255,0.10), transparent 60%),
    radial-gradient(700px 500px at 110% 10%, rgba(94,234,212,0.08), transparent 60%),
    radial-gradient(800px 600px at 50% 120%, rgba(196,181,253,0.06), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #a0b4ff; }

img, svg { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10,13,18,0.72);
  border-bottom: 1px solid rgba(35,43,61,0.7);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  color: var(--fg);
  font-weight: 700;
  font-size: 15px;
}
.logo:hover { color: var(--fg); }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--grad);
  color: #0a0d12;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.logo-text { font-family: var(--sans); }

/* Headshot avatar - replaces the gradient mark on contact + demo pages */
.logo-photo {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 2px solid transparent;
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    linear-gradient(135deg, #7c9cff 0%, #5eead4 55%, #c4b5fd 100%) border-box;
  transition: transform .25s ease;
}
.logo:hover .logo-photo { transform: scale(1.06); }

/* Larger circular profile picture, used on the contact page */
.profile-pic {
  width: 96px; height: 96px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 3px solid transparent;
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    linear-gradient(135deg, #7c9cff 0%, #5eead4 55%, #c4b5fd 100%) border-box;
  box-shadow: 0 12px 32px rgba(0,0,0,0.45);
  margin-bottom: 18px;
  display: block;
}
/* Variant: contact-form-side portrait. Bigger, centered above the form
   card so it balances the heading column on the left. */
.profile-pic--form {
  width: 168px; height: 168px;
  margin: 0 auto 28px;
  border-width: 4px;
}

.nav-links {
  display: flex; align-items: center; gap: 28px;
}
.nav-links a {
  color: var(--fg-soft);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color .15s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.active {
  color: var(--fg);
}
.nav-links a.active::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; border-radius: 2px;
  background: var(--grad);
}

/* Dropdown menu - Demo submenu */
.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown-trigger {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--fg-soft); font-size: 14px; font-weight: 500;
  position: relative; padding: 6px 0;
  transition: color .15s ease;
  cursor: pointer;
}
.nav-dropdown-trigger:hover { color: var(--fg); }
.dd-chev {
  font-size: 9px; opacity: 0.55;
  transition: transform .18s ease, opacity .18s ease;
  display: inline-block;
}
.nav-dropdown:hover .dd-chev,
.nav-dropdown:focus-within .dd-chev { transform: rotate(-180deg); opacity: 1; }

.nav-dropdown-panel {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: rgba(20,22,30,0.96);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 8px;
  min-width: 320px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  box-shadow: 0 24px 48px -16px rgba(0,0,0,0.55), 0 4px 12px -4px rgba(0,0,0,0.4);
  z-index: 50;
}
.nav-dropdown-panel::before {
  /* invisible bridge so cursor can travel from trigger to panel */
  content: "";
  position: absolute; top: -14px; left: 0; right: 0; height: 14px;
}
.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown:focus-within .nav-dropdown-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dd-item {
  display: flex; flex-direction: column; gap: 3px;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--fg-soft);
  transition: background .15s ease, color .15s ease;
}
.dd-item:hover { background: rgba(124,156,255,0.12); color: var(--fg); }
.dd-item-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.dd-item strong { color: var(--fg); font-size: 14px; font-weight: 600; }
.dd-item .dd-sub { font-size: 12px; color: var(--fg-mute); font-family: var(--mono); letter-spacing: 0.2px; }
.dd-item.dd-default {
  background: linear-gradient(135deg, rgba(94,234,212,0.10), rgba(124,156,255,0.10));
  border: 1px solid rgba(94,234,212,0.18);
}
.dd-item.dd-default:hover { background: linear-gradient(135deg, rgba(94,234,212,0.16), rgba(124,156,255,0.16)); }
.dd-tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  color: #5eead4; padding: 2px 7px;
  background: rgba(94,234,212,0.14); border-radius: 999px;
  border: 1px solid rgba(94,234,212,0.3);
}

@media (max-width: 760px) {
  .nav-links.open .nav-dropdown { width: 100%; }
  .nav-links.open .nav-dropdown-trigger { width: 100%; justify-content: space-between; }
  .nav-links.open .nav-dropdown-panel {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    min-width: 0;
    margin-top: 6px;
    background: rgba(255,255,255,0.04);
    box-shadow: none;
  }
  .nav-links.open .nav-dropdown:hover .nav-dropdown-panel,
  .nav-links.open .nav-dropdown:focus-within .nav-dropdown-panel { transform: none; }
}

.nav-cta {
  display: inline-flex; align-items: center;
  background: var(--fg);
  color: #0a0d12;
  font-weight: 600;
  font-size: 13.5px;
  padding: 9px 16px;
  border-radius: 999px;
  transition: transform .15s ease, background .15s ease;
}
.nav-cta:hover { background: #fff; color: #0a0d12; transform: translateY(-1px); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 96px 28px 64px;
}

.eyebrow {
  display: inline-flex; align-items: center;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-soft);
  background: rgba(94,234,212,0.07);
  border: 1px solid rgba(94,234,212,0.18);
  padding: 6px 12px;
  border-radius: 999px;
  letter-spacing: 0.2px;
  margin-bottom: 22px;
}
.eyebrow .led { margin-right: 8px; }

.led {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(52,211,153,0.7);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.4; box-shadow: 0 0 2px rgba(52,211,153,0.3); } }

.hero-title {
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 17px;
  color: var(--fg-soft);
  max-width: 56ch;
  margin: 0 0 30px;
}
.hero-sub strong { color: var(--fg); }

.hero-cta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14.5px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--grad);
  color: #0a0d12;
}
.btn-primary:hover { transform: translateY(-2px); color: #0a0d12; }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-2);
}
.btn-ghost:hover { background: var(--surface); color: var(--fg); }
.arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 14px 36px;
  font-family: var(--mono);
  font-size: 12.5px;
}
.hero-meta > div { display: flex; flex-direction: column; gap: 2px; }
.meta-k { color: var(--fg-mute); text-transform: uppercase; letter-spacing: 0.6px; font-size: 11px; }
.meta-v { color: var(--fg); }

/* code window in hero */
.code-window {
  background: linear-gradient(180deg, #0e1320 0%, #0a0d18 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: perspective(1400px) rotateY(-3deg) rotateX(2deg);
  transition: transform .4s ease;
}
.code-window:hover { transform: perspective(1400px) rotateY(0deg) rotateX(0deg); }

.code-window-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}
.code-window-title {
  margin-left: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-mute);
}
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.dot.red    { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green  { background: #27c93f; }

.code-window-body {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  margin: 0;
  padding: 22px 24px;
  color: var(--fg);
  overflow-x: auto;
  white-space: pre;
}
.code-window-body code { font-family: inherit; color: inherit; }

/* code token colors */
.k   { color: var(--k); }
.s   { color: var(--s); }
.n   { color: var(--n); }
.c, .cls { color: var(--c); }
.fn  { color: var(--fn); }
.v   { color: var(--v); }
.comment { color: var(--cm); font-style: italic; }
.b   { color: var(--b); }

/* ============================================================
   STATS STRIP
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 18px 28px 80px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  transition: border-color .2s ease, transform .2s ease;
}
.stat:hover { border-color: var(--accent); transform: translateY(-3px); }
.stat-num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 30px;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 4px;
}
.stat-lbl {
  font-size: 13.5px;
  color: var(--fg-soft);
  line-height: 1.45;
}

/* ============================================================
   SECTIONS - common
   ============================================================ */
.section {
  padding: 80px 28px;
  scroll-margin-top: 80px;
}
.section-head { margin-bottom: 36px; max-width: 760px; }
.section-tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 12px;
}
.section h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

/* reveal anim */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 36px;
  align-items: start;
}
.about-copy p {
  font-size: 16px;
  color: var(--fg-soft);
  margin: 0 0 14px;
}
.about-copy strong { color: var(--fg); }
.about-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 18px;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(124,156,255,0.08);
  border: 1px solid rgba(124,156,255,0.2);
  color: var(--fg);
}

.aside-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.aside-card-head {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 12px;
}
.aside-card dl {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px 14px;
  margin: 0;
}
.aside-card dt {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-mute);
}
.aside-card dd {
  margin: 0;
  font-size: 13.5px;
  color: var(--fg);
}

/* ============================================================
   TIMELINE / EXPERIENCE
   ============================================================ */
.timeline {
  list-style: none;
  margin: 0; padding: 0 0 0 14px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute; top: 8px; bottom: 8px; left: 7px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
  border-radius: 2px;
  opacity: 0.45;
}
.t-item {
  position: relative;
  padding: 0 0 28px 36px;
}
.t-marker {
  position: absolute; left: -3px; top: 22px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 0 4px rgba(124,156,255,0.18);
}
.t-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color .2s ease, transform .2s ease;
}
.t-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.t-head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}
.t-head h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.t-when {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-mute);
}
.t-company {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent-2);
  margin-bottom: 12px;
}
.t-points {
  margin: 0; padding-left: 20px;
  color: var(--fg-soft);
  font-size: 14.5px;
}
.t-points li { margin: 4px 0; }
.t-points em { color: var(--accent); font-style: normal; }
.t-points strong { color: var(--fg); }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.project-section-heading {
  grid-column: 1 / -1;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
  margin-top: 4px;
}
.project-section-heading h3 {
  font-family: var(--display, var(--sans));
  font-size: clamp(20px, 2.4vw, 26px);
  margin: 6px 0 0;
  letter-spacing: -0.01em;
}
.project-section-heading p {
  color: var(--fg-soft);
  font-size: 14px;
  margin: 6px 0 0;
  max-width: 720px;
}
.project-section-heading .section-tag { font-size: 11px; }
.project {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px 22px;
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.project:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  background: var(--surface-2);
}
.project.featured {
  grid-column: span 2;
  background: linear-gradient(160deg, rgba(124,156,255,0.06) 0%, rgba(94,234,212,0.04) 100%), var(--surface);
}
.project-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-mute);
  margin-bottom: 8px;
}
.project-kind { color: var(--accent-2); }
.project-title {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.project-desc {
  margin: 0 0 12px;
  color: var(--fg-soft);
  font-size: 14.5px;
}
.project-bullets {
  list-style: none;
  margin: 0 0 14px; padding: 0;
  display: flex; flex-direction: column; gap: 4px;
}
.project-bullets li {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-soft);
  padding-left: 18px;
  position: relative;
}
.project-bullets li::before {
  content: "▸";
  color: var(--accent-2);
  position: absolute; left: 2px; top: 0;
}
.project-bullets strong { color: var(--fg); }
.project-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.project-impl {
  margin-top: 16px;
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}
.mini-code {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre;
  overflow-x: auto;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  transition: border-color .2s ease, transform .2s ease;
}
.skill-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.skill-card h4 {
  margin: 0 0 14px;
  font-size: 14px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--accent-2);
}
.skill-card ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 12px;
}
.skill-card li {
  display: flex; align-items: center; gap: 12px;
}
.bar {
  flex: 0 0 92px;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.bar > span {
  display: block;
  height: 100%;
  width: var(--w, 60%);
  background: var(--grad);
  border-radius: 999px;
  transform: translateX(-100%);
  animation: barFill 1.2s cubic-bezier(.2,.7,.2,1) forwards;
}
@keyframes barFill { to { transform: translateX(0); } }

.bar-lbl {
  font-size: 13.5px;
  color: var(--fg);
  font-family: var(--sans);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-box {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
  background: linear-gradient(160deg, rgba(124,156,255,0.08) 0%, rgba(94,234,212,0.05) 100%), var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 44px 44px;
}
.contact-left p {
  color: var(--fg-soft);
  margin: 12px 0 22px;
  max-width: 50ch;
}
.contact-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 10px;
}
.contact-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  align-items: center;
  background: rgba(10,13,18,0.4);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
}
.contact-k {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.contact-k::after { content: ':'; margin-inline-start: 1px; opacity: .65; }
.contact-v {
  font-size: 14.5px;
  color: var(--fg);
}
a.contact-v:hover { color: var(--accent); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  margin-top: 30px;
}
.footer-inner {
  display: flex; justify-content: space-between; gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}
.footer-copy {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-mute);
}
.footer-links { display: flex; gap: 18px; }
.footer-links a {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-soft);
}
.footer-links a:hover { color: var(--accent); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1020px) {
  .hero { grid-template-columns: 1fr; padding: 64px 28px 32px; gap: 36px; }
  .hero-right { order: 2; }
  .stats { grid-template-columns: repeat(2, 1fr); padding-bottom: 48px; }
  .about-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .project.featured { grid-column: auto; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-box { grid-template-columns: 1fr; padding: 32px 28px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-title { font-size: 38px; }
  .hero-meta { grid-template-columns: 1fr; gap: 10px; }
  .skills-grid { grid-template-columns: 1fr; }
  .stat-num { font-size: 26px; }
  .t-head h3 { font-size: 17px; }
  .section { padding: 60px 28px; }
}

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1f2738; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2b3650; }

/* focus visibility */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 999px;
}

/* ============================================================
   VIEW TOGGLE  (All / Engineering / Coding)
   ============================================================ */

.view-toggle {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12.5px;
}
.vt-pill {
  background: transparent;
  border: none;
  color: var(--fg-soft);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit; font-size: inherit;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: background .15s ease, color .15s ease;
}
.vt-pill:hover { color: var(--fg); }
.vt-pill[aria-selected="true"] {
  background: var(--grad);
  color: #0a0d12;
  font-weight: 700;
}

/* Hero panes - only the matching variant is visible per view */
.view-pane                  { display: none; }
body.view-all .view-pane[data-view="all"],
body.view-eng .view-pane[data-view="eng"],
body.view-code .view-pane[data-view="code"] { display: revert; }
/* flex-restoring for hero meta entries that need flex */
body.view-all .hero-meta .view-pane[data-view="all"],
body.view-eng .hero-meta .view-pane[data-view="eng"],
body.view-code .hero-meta .view-pane[data-view="code"] { display: flex; }

/* hero subline + code window should remain block-displayed */
body.view-all  .hero-sub.view-pane[data-view="all"],
body.view-eng  .hero-sub.view-pane[data-view="eng"],
body.view-code .hero-sub.view-pane[data-view="code"],
body.view-all  .code-window.view-pane[data-view="all"],
body.view-eng  .code-window.view-pane[data-view="eng"],
body.view-code .code-window.view-pane[data-view="code"] { display: block; }

/* hero CTA ghost buttons stay inline-flex */
body.view-all  .btn.view-pane[data-view="all"],
body.view-eng  .btn.view-pane[data-view="eng"],
body.view-code .btn.view-pane[data-view="code"] { display: inline-flex; }

/* Domain filtering on cards/items */
body.view-eng  [data-domain="code"],
body.view-code [data-domain="eng"]      { display: none !important; }

/* Soft fade-in when items become visible */
body.view-eng  [data-domain="eng"],
body.view-code [data-domain="code"],
body.view-all  [data-domain]            { animation: viewFadeIn 0.35s ease-out; }
@keyframes viewFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.contact-page {
  padding: 88px 28px 96px;
}
.contact-page-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-page-left .section-tag {
  color: var(--accent-2);
}

.reply-time {
  display: flex; align-items: center; gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-top: 18px;
}
.reply-bar {
  flex: 0 0 60px;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
}
.reply-fill {
  display: block; height: 100%; width: 0;
  background: var(--grad);
  border-radius: 999px;
  animation: reply-anim 2.4s ease-out infinite;
}
@keyframes reply-anim {
  0%   { width: 0; }
  60%  { width: 95%; }
  100% { width: 0; }
}
.reply-text {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-soft);
}
.reply-text strong { color: var(--fg); }

/* ============================================================
   FORM CARD
   ============================================================ */
.form-card {
  background: linear-gradient(160deg, rgba(124,156,255,0.05) 0%, rgba(94,234,212,0.03) 100%), var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 28px 24px;
  box-shadow: var(--shadow);
  position: relative;
}
.form-head { margin-bottom: 20px; }
.form-head h2 {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.form-head p {
  margin: 0;
  color: var(--fg-mute);
  font-size: 14px;
}
.mono-inline {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent-2);
  background: rgba(94,234,212,0.08);
  padding: 1px 6px;
  border-radius: 4px;
}

.form-row {
  display: flex; flex-direction: column;
  margin-bottom: 14px;
  position: relative;
}
.form-row label {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}
.req { color: var(--red); margin-left: 2px; }
.opt { color: var(--fg-mute); text-transform: none; letter-spacing: 0; }

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--fg);
  background: rgba(10,13,18,0.55);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  outline: none;
  transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.form-row textarea { resize: vertical; min-height: 120px; font-family: inherit; }
.form-row select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'><path fill='%237f8a9d' d='M1 1l5 5 5-5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 10px;
  padding-right: 36px;
}
.form-row select option {
  background: var(--surface);
  color: var(--fg);
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: var(--fg-mute);
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--accent);
  background: rgba(10,13,18,0.7);
  box-shadow: 0 0 0 3px rgba(124,156,255,0.18);
}

.form-row.invalid input,
.form-row.invalid textarea,
.form-row.invalid select {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(248,113,113,0.15);
}
.form-row .err-msg {
  display: none;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--red);
  margin-top: 4px;
}
.form-row.invalid .err-msg { display: block; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-hint {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-mute);
  text-align: right;
  margin-top: 4px;
}

.honeypot {
  position: absolute !important;
  left: -10000px !important;
  width: 1px !important; height: 1px !important;
  opacity: 0 !important;
}

.form-actions {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-top: 6px;
}
#submit-btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}
#submit-btn.loading .btn-label::after {
  content: "…";
  margin-left: 4px;
}

/* status messages */
.form-status {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13px;
  display: none;
}
.form-status.show { display: block; }
.form-status.success {
  background: rgba(52,211,153,0.08);
  border: 1px solid rgba(52,211,153,0.3);
  color: var(--green);
}
.form-status.error {
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.3);
  color: var(--red);
}
.form-status .small {
  display: block;
  font-size: 11.5px;
  color: var(--fg-mute);
  margin-top: 4px;
}

/* sent-checkmark animation */
.sent-anim {
  display: flex; align-items: center; gap: 10px;
}
.sent-anim svg {
  width: 22px; height: 22px;
  flex-shrink: 0;
}
.sent-anim svg circle {
  stroke: var(--green);
  fill: none;
  stroke-width: 2;
  stroke-dasharray: 76;
  stroke-dashoffset: 76;
  animation: drawCircle .55s ease forwards;
}
.sent-anim svg path {
  stroke: var(--green);
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  animation: drawCheck .35s ease .5s forwards;
}
@keyframes drawCircle { to { stroke-dashoffset: 0; } }
@keyframes drawCheck  { to { stroke-dashoffset: 0; } }

@media (max-width: 980px) {
  .contact-page-grid { grid-template-columns: 1fr; gap: 36px; }
  .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; }
  .container { padding: 0 20px; }

  /* Nav layout */
  .nav-inner { height: 60px; }
  .nav-links { display: none; }   /* contact + demo pages: external nav, no menu needed on mobile */
  .nav-cta { padding: 8px 14px; font-size: 13px; }

  /* Contact page hero */
  .contact-page { padding: 32px 20px 60px; }
  .profile-pic { width: 72px; height: 72px; margin-bottom: 14px; }
  .profile-pic--form { width: 128px; height: 128px; margin: 0 auto 22px; border-width: 3px; }
  .contact-page-left .hero-title { font-size: clamp(28px, 7vw, 36px) !important; }
  .hero-sub { font-size: 15px; }
  .contact-list li { grid-template-columns: 86px 1fr; padding: 11px 14px; }
  .contact-k { font-size: 11px; }
  .contact-v { font-size: 13px; }
  .reply-time { padding: 12px 14px; }

  /* Form card */
  .form-card { padding: 22px 20px 20px; }
  .form-head h2 { font-size: 20px; }
  .form-row input, .form-row select, .form-row textarea { font-size: 16px; padding: 11px 12px; }
  .form-row label { font-size: 11px; }
  .form-actions { flex-direction: column; align-items: stretch; }
  .form-actions .btn { justify-content: center; }

  /* Demo page app frame becomes vertical */
  .demo-banner-inner { flex-direction: column; align-items: flex-start; gap: 8px; padding: 12px 20px; }
  .demo-intro { padding: 36px 20px 24px; }
  .demo-meta { grid-template-columns: 1fr 1fr; gap: 10px; }
  .demo-meta-item { padding: 12px 14px; }
  .app-frame { padding: 12px 20px 40px; }
  .app-shell { grid-template-columns: 1fr; min-height: 0; }
  .app-sidebar { border-right: 0; border-bottom: 1px solid var(--border); padding: 14px 12px; }
  .app-nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px; }
  .app-nav-section { grid-column: 1 / -1; padding: 8px 8px 4px; }
  .app-main { padding: 18px 16px 24px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .grid-2 { grid-template-columns: 1fr; gap: 12px; }
  .repo-grid, .doc-grid { grid-template-columns: 1fr; }
  .data-table { font-size: 12.5px; }
  .data-table thead th { padding: 6px 8px; font-size: 10px; }
  .data-table tbody td { padding: 8px; }
  .view-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .view-actions { flex-wrap: wrap; }
  .window-chrome { padding: 8px 10px; }
  .window-url, .window-user { font-size: 11px; }

  /* Footer */
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
}

@media (max-width: 380px) {
  .contact-list li { grid-template-columns: 72px 1fr; gap: 8px; padding: 10px 12px; }
  .kpi-row { grid-template-columns: 1fr; }
  .demo-meta { grid-template-columns: 1fr; }
}

/* Touch-target sizing on real touch devices */
@media (hover: none) and (pointer: coarse) {
  a, button, .btn, .btn-mini, .tag, .nav-cta { min-height: 40px; }
  input, select, textarea { font-size: 16px; }   /* prevents iOS zoom on focus */
}

/* ============================================================
   VIEW TOGGLE eyebrow + prominent CTA + CTA subtitle
   ============================================================ */
.view-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.view-toggle-wrap .view-toggle { margin-bottom: 0; }
.view-toggle-hint {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.vt-pill:hover:not([aria-selected="true"]) {
  background: rgba(124,156,255,0.08);
  color: var(--fg);
}

/* Prominent CTA for the featured project */
.btn.btn-prominent {
  padding: 14px 24px;
  font-size: 15px;
  letter-spacing: 0.3px;
  background: linear-gradient(135deg, #5eead4, #7c9cff);
  color: #07080d;
  box-shadow: 0 10px 28px -10px rgba(94,234,212,0.55);
  border: 0;
}
.btn.btn-prominent:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px -10px rgba(94,234,212,0.65);
}

/* Small caption under a project CTA */
.project-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.cta-subtitle {
  width: 100%;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-mute);
  margin-top: 4px;
  letter-spacing: 0.2px;
}

/* ============================================================
   Back-to-top button - fixed bottom-right, appears past 400px.
   Used on index, contact, demo. The button is hidden by default
   and gets the .visible class from the inline IIFE script.
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 60;
  width: 48px; height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 156, 255, 0.28);
  border-radius: 999px;
  background: rgba(19, 24, 38, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--fg);
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px) scale(0.96);
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, background .15s ease, border-color .15s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.back-to-top:hover {
  background: rgba(124, 156, 255, 0.16);
  border-color: rgba(124, 156, 255, 0.5);
  color: #ffffff;
  transform: translateY(-2px) scale(1.03);
}
.back-to-top:active {
  transform: translateY(0) scale(0.97);
}
.back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.back-to-top svg {
  width: 20px; height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Hide on print + when the page hasn't scrolled enough */
@media print { .back-to-top { display: none !important; } }
@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: opacity .15s linear;
    transform: none;
  }
  .back-to-top.visible { transform: none; }
  .back-to-top:hover { transform: none; }
}