/* ═══════════════════════════════════════════════════════════════
   Samih Abdal Khalik — portfolio
   Dark surface, emerald primary, soft-cornered cards.
   1. tokens  2. base  3. chrome  4. blocks  5. rail  6. responsive
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. tokens ─────────────────────────────────────────────── */
:root {
  --background:  #0A0E13;
  --surface:     #121821;
  --surface-2:   #1A2231;
  --border:      #232D3A;
  --border-soft: #1A222D;
  --foreground:  #E6EDF3;
  --muted:       #8FA0B0;
  --muted-2:     #6B7C8C;
  --primary:     #35D6A4;
  --primary-ink: #06231A;
  --accent:      #6FD8FF;
  --grad:        linear-gradient(100deg, #35D6A4 0%, #6FD8FF 100%);
  --grid-line:   rgba(230,237,243,.055);

  --card-shadow: 0 1px 2px rgba(0,0,0,.34), 0 18px 40px -26px rgba(0,0,0,.9);
  --lift:        0 2px 6px rgba(0,0,0,.4), 0 30px 60px -30px rgba(0,0,0,1);
  --glow:        0 10px 30px -12px rgba(53,214,164,.45);

  --display: "Sora", "Helvetica Neue", Arial, sans-serif;
  --body:    "Manrope", "Helvetica Neue", Arial, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --shell:  1152px;
  --gutter: clamp(20px, 5vw, 48px);
  --band-y: clamp(64px, 9vw, 112px);
  --radius: 16px;
  --radius-sm: 10px;

  --ease:  cubic-bezier(.22, .61, .36, 1);
  --ease2: cubic-bezier(.65, .01, .35, 1);
}

:root[data-theme="light"] {
  --background:  #F6F8F7;
  --surface:     #FFFFFF;
  --surface-2:   #EDF1EF;
  --border:      #E0E6E3;
  --border-soft: #E9EEEB;
  --foreground:  #0C1116;
  --muted:       #596B78;
  --muted-2:     #7B8B96;
  --primary:     #0B9C74;
  --primary-ink: #FFFFFF;
  --accent:      #0E7490;
  --grad:        linear-gradient(100deg, #0B9C74 0%, #0E7490 100%);
  --grid-line:   rgba(12,17,22,.06);
  --card-shadow: 0 1px 2px rgba(12,17,22,.05), 0 16px 36px -24px rgba(12,17,22,.35);
  --lift:        0 2px 6px rgba(12,17,22,.07), 0 28px 56px -28px rgba(12,17,22,.5);
  --glow:        0 10px 30px -12px rgba(11,156,116,.35);
}

/* ── 2. base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s var(--ease), color .35s var(--ease);
}

h1, h2, h3, h4 { font-family: var(--display); font-weight: 600; line-height: 1.1; letter-spacing: -.02em; margin: 0; }
p { margin: 0; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

::selection { background: var(--primary); color: var(--primary-ink); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 6px; }

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--primary); color: var(--primary-ink);
  padding: 12px 18px; font-family: var(--mono); font-size: .8rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; top: 0; }

.eyebrow {
  font-family: var(--mono); font-size: .72rem; font-weight: 500;
  letter-spacing: .25em; text-transform: uppercase; color: var(--primary);
}

.text-gradient {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.page-enter { animation: rise .5s var(--ease) both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ── 3. chrome ─────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--background) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease);
}
.topbar.is-stuck { border-bottom-color: var(--border); }
.topbar__inner { display: flex; align-items: center; gap: 18px; height: 68px; }

.mark { display: flex; align-items: center; gap: 9px; margin-right: auto; font-family: var(--mono); font-size: .92rem; letter-spacing: -.01em; }
.mark__glyph { display: flex; }
.mark__glyph rect { fill: var(--surface-2); }
.mark__glyph path { stroke: var(--primary); stroke-width: 3.2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.mark__dot { color: var(--primary); }

.nav { display: flex; gap: 4px; }
.nav a {
  position: relative; padding: 8px 14px; border-radius: 9px;
  font-size: .89rem; color: var(--muted);
  transition: color .22s var(--ease), background-color .22s var(--ease);
}
.nav a:hover { color: var(--foreground); background: var(--surface); }
.nav a[aria-current="page"] { color: var(--foreground); }
.nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px;
  height: 2px; border-radius: 2px; background: var(--grad);
}

.topbar__tools { display: flex; align-items: center; gap: 8px; }
.hire {
  display: inline-flex; align-items: center; height: 38px; padding: 0 16px;
  border-radius: var(--radius-sm); background: var(--primary); color: var(--primary-ink);
  font-size: .86rem; font-weight: 600;
  transition: opacity .22s var(--ease), transform .22s var(--ease);
}
.hire:hover { opacity: .9; transform: translateY(-1px); }

.iconbtn {
  width: 38px; height: 38px; display: grid; place-items: center;
  background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--muted); cursor: pointer;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}
.iconbtn:hover { color: var(--foreground); border-color: var(--muted-2); background: var(--surface); }
.iconbtn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.i-sun { display: block; }
.i-moon { display: none; }
:root[data-theme="light"] .i-sun  { display: none; }
:root[data-theme="light"] .i-moon { display: block; }
.menubtn { display: none; }

.foot { border-top: 1px solid var(--border); padding: 44px 0 32px; }
.foot__inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 34px; }
.foot__say { font-family: var(--display); font-size: 1.2rem; font-weight: 600; max-width: 22ch; }
.foot__mail { display: inline-block; margin-top: 12px; color: var(--primary); font-family: var(--mono); font-size: .82rem; }
.foot__mail:hover { text-decoration: underline; text-underline-offset: 4px; }
.foot h4 {
  font-family: var(--mono); font-size: .68rem; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 12px;
}
.foot li { margin-bottom: 7px; }
.foot li a { font-size: .92rem; color: var(--muted); transition: color .2s var(--ease); }
.foot li a:hover { color: var(--primary); }
.foot__base {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border-soft);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-family: var(--mono); font-size: .72rem; color: var(--muted-2);
}

/* ── 4. blocks ─────────────────────────────────────────────── */
.band { padding: var(--band-y) 0; }
.band--line { border-top: 1px solid var(--border); }
.band--tint { background: color-mix(in srgb, var(--surface) 55%, var(--background)); }
/* a page header already carries its own bottom space */
.pagehead + .band { padding-top: clamp(18px, 3vw, 38px); }

.sechead { margin-bottom: clamp(28px, 4vw, 42px); }
.sechead__title { margin-top: 12px; font-size: clamp(1.75rem, 3.6vw, 2.5rem); }
.sechead__count { display: block; margin-top: 10px; font-family: var(--mono); font-size: .74rem; color: var(--muted-2); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--card-shadow);
}

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  height: 46px; padding: 0 20px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: none; color: var(--foreground);
  font-family: var(--body); font-size: .89rem; font-weight: 600; cursor: pointer;
  transition: background-color .22s var(--ease), border-color .22s var(--ease), opacity .22s var(--ease), transform .22s var(--ease);
}
.btn:hover { background: var(--surface-2); transform: translateY(-1px); }
.btn--solid { background: var(--primary); color: var(--primary-ink); border-color: transparent; box-shadow: var(--glow); }
.btn--solid:hover { background: var(--primary); opacity: .9; }
.btn__arrow { transition: transform .22s var(--ease); }
.btn:hover .btn__arrow { transform: translate(3px, -3px); }
.btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* hero ─────────────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 9vw, 130px) 0 clamp(56px, 8vw, 104px); }
.hero__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000, transparent 75%);
}
.hero__glow {
  position: absolute; top: -30%; left: 50%; width: 900px; height: 620px;
  transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(closest-side, rgba(53,214,164,.14), transparent 70%);
}
:root[data-theme="light"] .hero__glow { background: radial-gradient(closest-side, rgba(11,156,116,.12), transparent 70%); }
.hero__inner { position: relative; }

.pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px; border: 1px solid var(--border); border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  font-family: var(--mono); font-size: .73rem; color: var(--muted);
}
.pill__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 4px rgba(53,214,164,.16); }

.hero__title { margin-top: 28px; font-size: clamp(2.5rem, 6.4vw, 4.4rem); font-weight: 600; letter-spacing: -.03em; max-width: 18ch; }
.hero__title span { display: block; }
.lede { margin-top: 22px; max-width: 60ch; font-size: 1.06rem; color: var(--muted); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: clamp(44px, 6vw, 66px); max-width: 620px; }
.stats > div {
  padding: 20px; background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.stats dt { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.stats .stat__n { font-family: var(--display); font-size: 1.9rem; font-weight: 600; color: var(--primary); margin: 0; letter-spacing: -.02em; }
.stats .stat__l { margin: 6px 0 0; font-size: .86rem; color: var(--muted); line-height: 1.45; }

/* trio ─────────────────────────────────────────────────────── */
.trio { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); }
.trio__item {
  padding: 26px 24px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color .28s var(--ease), transform .28s var(--ease), box-shadow .28s var(--ease);
}
.trio__item:hover { border-color: color-mix(in srgb, var(--primary) 55%, var(--border)); transform: translateY(-4px); box-shadow: var(--lift); }
.trio__k { font-family: var(--mono); font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.trio__h { margin-top: 12px; font-size: 1.18rem; }
.trio__p { margin-top: 10px; color: var(--muted); font-size: .95rem; }

/* steps ────────────────────────────────────────────────────── */
.steps { display: grid; gap: 14px; }
.step {
  display: grid; grid-template-columns: 76px 1fr; gap: 22px;
  padding: 24px 26px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.step__n { font-family: var(--mono); font-size: .78rem; letter-spacing: .1em; color: var(--primary); padding-top: 4px; }
.step__h { font-size: 1.08rem; }
.step__p { margin-top: 7px; color: var(--muted); font-size: .95rem; max-width: 62ch; }

/* chips + skill cards ──────────────────────────────────────── */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  padding: 6px 12px; border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--muted);
  font-size: .84rem;
  transition: color .22s var(--ease), background-color .22s var(--ease);
}
.chips li:hover { color: var(--foreground); background: color-mix(in srgb, var(--primary) 16%, var(--surface-2)); }

.skillcard {
  padding: 26px 24px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.skillcard + .skillcard { margin-top: 18px; }
.skillcard__top { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.skillcard__h { font-size: 1.25rem; }
.skillcard__tag { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.skillcard__p { margin: 12px 0 18px; color: var(--muted); max-width: 70ch; font-size: .96rem; }

/* experience ───────────────────────────────────────────────── */
.role { padding: 30px 28px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--card-shadow); }
.role__top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 10px; }
.role__co { font-family: var(--display); font-size: 1.2rem; font-weight: 600; }
.role__when { font-family: var(--mono); font-size: .76rem; color: var(--primary); }
.duties { margin-top: 24px; display: grid; gap: 15px; }
.duties li { display: grid; grid-template-columns: 20px 1fr; gap: 12px; color: var(--muted); font-size: .96rem; line-height: 1.6; }
.duties svg { width: 17px; height: 17px; margin-top: 4px; fill: none; stroke: var(--primary); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* timeline / education rows ────────────────────────────────── */
.edu { display: grid; gap: 14px; }
.edu__item {
  display: grid; grid-template-columns: 132px 1fr; gap: 26px;
  padding: 24px 26px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color .28s var(--ease);
}
.edu__item:hover { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }
.edu__when { font-family: var(--mono); font-size: .76rem; color: var(--primary); }
.edu__what { font-size: 1.05rem; }
.edu__where { margin-top: 4px; font-size: .9rem; color: var(--accent); }
.edu__p { margin-top: 9px; color: var(--muted); font-size: .94rem; max-width: 62ch; }

.pairs { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; }
.pair { padding: 24px 26px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.pair h3 { font-family: var(--mono); font-size: .69rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.pair p { margin-top: 12px; color: var(--muted); font-size: .94rem; }

/* about ────────────────────────────────────────────────────── */
.split { display: grid; grid-template-columns: 1.3fr .7fr; gap: clamp(28px, 5vw, 62px); align-items: start; }
.prose p { color: var(--muted); font-size: 1.02rem; }
.prose p + p { margin-top: 16px; }
.prose strong { color: var(--foreground); font-weight: 600; }

.aside { position: sticky; top: 92px; padding: 26px 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--card-shadow); }
.aside h4 { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.aside__row { display: flex; justify-content: space-between; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border-soft); font-size: .92rem; }
.aside__row:last-of-type { border-bottom: none; }
.aside__row span:first-child { color: var(--muted-2); }
.aside .btn { width: 100%; justify-content: center; margin-top: 18px; }

/* contact ──────────────────────────────────────────────────── */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 8px; }
.field label { font-family: var(--mono); font-size: .69rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-2); }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 15px;
  font-family: var(--body); font-size: .97rem; color: var(--foreground);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.field textarea { min-height: 150px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}
.form__note { font-family: var(--mono); font-size: .72rem; color: var(--muted-2); line-height: 1.7; }

.reach { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.linkrow {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px;
  width: 100%; text-align: left; cursor: pointer;
  padding: 20px 22px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--foreground); font: inherit;
  transition: border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}
.linkrow:hover { border-color: color-mix(in srgb, var(--primary) 55%, var(--border)); transform: translateY(-3px); box-shadow: var(--lift); }
.linkrow__k { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted-2); }
.linkrow__v { margin-top: 7px; font-size: .98rem; word-break: break-word; }
.linkrow__hint { font-family: var(--mono); font-size: .72rem; color: var(--primary); opacity: 0; transition: opacity .22s var(--ease); }
.linkrow:hover .linkrow__hint, .linkrow:focus-visible .linkrow__hint, .linkrow__hint.is-copied { opacity: 1; }

/* page header ──────────────────────────────────────────────── */
.pagehead { position: relative; overflow: hidden; padding: clamp(48px, 7vw, 92px) 0 clamp(34px, 4vw, 52px); }
.pagehead__title { margin-top: 14px; font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 600; letter-spacing: -.03em; max-width: 18ch; }
.pagehead__lede { margin-top: 18px; max-width: 60ch; font-size: 1.04rem; color: var(--muted); }
.pagehead__meta { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 26px; }
.pagehead__meta span {
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  font-family: var(--mono); font-size: .71rem; color: var(--muted);
}
.pagehead__meta b { color: var(--primary); font-weight: 500; }

/* cta ──────────────────────────────────────────────────────── */
.cta { text-align: center; }
.cta__h { font-size: clamp(1.9rem, 4.4vw, 3rem); font-weight: 600; letter-spacing: -.03em; }
.cta__p { margin: 16px auto 0; max-width: 46ch; color: var(--muted); }
.cta__row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 30px; }

/* ── 5. the rail ───────────────────────────────────────────── */
.railwrap { position: relative; }
.railwrap::before, .railwrap::after {
  content: ""; position: absolute; top: 0; bottom: 22px; width: 64px; z-index: 2; pointer-events: none;
}
.railwrap::before { left: 0; background: linear-gradient(to right, var(--background), transparent); }
.railwrap::after  { right: 0; background: linear-gradient(to left, var(--background), transparent); }
.band--tint .railwrap::before { background: linear-gradient(to right, color-mix(in srgb, var(--surface) 55%, var(--background)), transparent); }
.band--tint .railwrap::after  { background: linear-gradient(to left,  color-mix(in srgb, var(--surface) 55%, var(--background)), transparent); }

.rail {
  display: flex; gap: 22px;
  overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding-block: 6px 22px;
  padding-left: calc(max(0px, (100% - var(--shell)) / 2) + var(--gutter));
  padding-right: var(--gutter);
  scroll-padding-left: calc(max(0px, (100% - var(--shell)) / 2) + var(--gutter));
  scrollbar-width: none; -ms-overflow-style: none;
  cursor: grab;
}
.rail::-webkit-scrollbar { display: none; }
.rail.is-dragging { cursor: grabbing; scroll-snap-type: none; scroll-behavior: auto; }
.rail.is-dragging * { pointer-events: none; }

.railcard {
  flex: 0 0 clamp(280px, 80vw, 396px);
  scroll-snap-align: start;
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--card-shadow);
  transition: border-color .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
}
.railcard:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: var(--lift); }
.rail.is-dragging .railcard:hover { transform: none; box-shadow: var(--card-shadow); }

.railcard__shot { position: relative; aspect-ratio: 3 / 2; overflow: hidden; background: var(--surface-2); }
.railcard__shot img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.railcard:hover .railcard__shot img { transform: scale(1.05); }
.railcard__badge {
  position: absolute; left: 12px; top: 12px;
  padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--background) 78%, transparent);
  backdrop-filter: blur(6px);
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--primary);
}

.railcard__body { display: flex; flex-direction: column; gap: 15px; padding: 22px; flex: 1; }
.railcard__h { font-size: 1.1rem; }
.railcard__p { color: var(--muted); font-size: .92rem; line-height: 1.62; flex: 1; }
.railcard__stat {
  padding: 10px 13px; border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  font-family: var(--mono); font-size: .72rem; color: var(--primary);
}
.railcard__actions { display: flex; gap: 10px; }
.railcard__actions .btn { flex: 1; height: 40px; padding: 0 12px; font-size: .82rem; justify-content: center; }

.railcard--end { justify-content: center; border-style: dashed; background: color-mix(in srgb, var(--primary) 7%, var(--surface)); }
.railcard--end .railcard__body { justify-content: center; gap: 14px; }
.railcard--end .btn { align-self: flex-start; }

.railbar { display: flex; align-items: center; gap: 18px; margin-top: 8px; }
.railtrack { position: relative; flex: 1; height: 3px; background: var(--border); border-radius: 3px; overflow: hidden; }
.railthumb { position: absolute; top: 0; left: 0; height: 100%; background: var(--grad); border-radius: 3px; transition: transform .18s var(--ease2), width .2s var(--ease2); }
.railhint { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); }
.railbtns { display: flex; gap: 8px; }
.railbtn {
  width: 42px; height: 42px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: 50%;
  color: var(--foreground); cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease), opacity .22s var(--ease), transform .22s var(--ease);
}
.railbtn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.railbtn:disabled { opacity: .3; cursor: default; }
.railbtn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* project detail ───────────────────────────────────────────── */
.detail { display: grid; gap: 18px; }
.detail__item { padding: 28px 26px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.detail__k { font-family: var(--mono); font-size: .69rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.detail__name { margin-top: 10px; font-size: 1.3rem; }
.detail__role { margin-top: 6px; font-family: var(--mono); font-size: .73rem; color: var(--muted-2); }
.detail__p { margin-top: 16px; color: var(--muted); font-size: .96rem; }
.detail__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--border-soft); }
.detail__cell h5 { margin: 0 0 6px; font-family: var(--mono); font-size: .66rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-2); font-weight: 500; }
.detail__cell p { font-size: .92rem; color: var(--muted); }

/* ── 6. responsive ─────────────────────────────────────────── */
@media (max-width: 940px) {
  .split { grid-template-columns: 1fr; }
  .aside { position: static; }
  .foot__inner { grid-template-columns: 1fr 1fr; }
  .foot__say { grid-column: 1 / -1; }
  .pairs { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .stats { grid-template-columns: 1fr; max-width: 420px; }
  .edu__item { grid-template-columns: 1fr; gap: 10px; }
  .step { grid-template-columns: 56px 1fr; gap: 14px; padding: 22px 20px; }
}

@media (max-width: 760px) {
  .menubtn { display: grid; }
  .hire { display: none; }
  .nav {
    position: fixed; inset: 68px 0 auto; flex-direction: column; gap: 0;
    background: var(--background); border-bottom: 1px solid var(--border);
    padding: 8px var(--gutter) 20px;
    transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: opacity .26s var(--ease), transform .26s var(--ease), visibility .26s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 15px 0; border-radius: 0; border-bottom: 1px solid var(--border-soft); }
  .nav a[aria-current="page"]::after { left: 0; right: auto; width: 20px; bottom: 8px; }
  .railwrap::before, .railwrap::after { width: 26px; }
  .foot__inner { grid-template-columns: 1fr; gap: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .rail { scroll-behavior: auto; }
}