/* ============================================================
   Saeed Almekhlfi — portfolio
   Data-pipeline themed. Dark-first with a light toggle.
   ============================================================ */

:root {
  /* dark theme (default) */
  --bg:            #0a0d12;
  --bg-plane:      #0d1117;
  --surface:       #141a22;
  --surface-2:     #1b232e;
  --border:        rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --ink:           #eef2f6;
  --ink-2:         #a7b2c0;
  --muted:         #6b7684;
  --accent:        #22d3aa;   /* teal — nods to your résumé */
  --accent-2:      #3b82f6;   /* blue */
  --accent-soft:   rgba(34,211,170,0.12);
  --good:          #34d399;
  --shadow:        0 18px 40px -20px rgba(0,0,0,0.7);
  --maxw: 1080px;
  --r: 16px;
}

html[data-theme="light"] {
  --bg:            #f7f8fa;
  --bg-plane:      #ffffff;
  --surface:       #ffffff;
  --surface-2:     #f1f4f8;
  --border:        rgba(11,17,25,0.10);
  --border-strong: rgba(11,17,25,0.16);
  --ink:           #0d1117;
  --ink-2:         #47525f;
  --muted:         #7a8593;
  --accent:        #0d9488;
  --accent-2:      #2563eb;
  --accent-soft:   rgba(13,148,136,0.10);
  --good:          #0f9d63;
  --shadow:        0 18px 40px -24px rgba(20,30,45,0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .35s ease, color .35s ease;
}

/* subtle grid/glow backdrop */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(680px 420px at 82% -6%, var(--accent-soft), transparent 70%),
    radial-gradient(560px 360px at 0% 8%, rgba(59,130,246,0.10), transparent 70%),
    linear-gradient(var(--border) 1px, transparent 1px) 0 0 / 100% 46px,
    linear-gradient(90deg, var(--border) 1px, transparent 1px) 0 0 / 46px 100%;
  mask-image: linear-gradient(180deg, #000 0, #000 60%, transparent 100%);
  opacity: .6;
}

a { color: inherit; text-decoration: none; }
strong { color: var(--ink); font-weight: 700; }

section, .nav { max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

/* ---------------- NAV ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding-block: 14px;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
  max-width: none;
}
.nav.is-stuck { border-bottom-color: var(--border); }
.nav > * { max-width: var(--maxw); }
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; margin-right: auto; }
.nav__brand { margin-left: max(24px, calc((100% - var(--maxw))/2)); }
.nav__actions { margin-right: max(24px, calc((100% - var(--maxw))/2)); display: flex; gap: 10px; align-items: center; }
.nav__logo {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121a; font-weight: 800; font-size: .85rem; letter-spacing: .5px;
}
.nav__name { font-size: .98rem; }
.nav__links { display: flex; gap: 22px; }
.nav__links a { color: var(--ink-2); font-size: .92rem; font-weight: 500; transition: color .2s; }
.nav__links a:hover { color: var(--accent); }

.icon-btn {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border); color: var(--ink-2);
  cursor: pointer; transition: .2s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.i-moon { display: none; }
html[data-theme="light"] .i-sun { display: none; }
html[data-theme="light"] .i-moon { display: block; }

/* ---------------- BUTTONS ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 12px; font-weight: 600; font-size: .92rem;
  border: 1px solid var(--border-strong); transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121a; border-color: transparent;
  box-shadow: 0 10px 26px -12px var(--accent);
}
.btn--ghost { background: var(--surface); color: var(--ink); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.nav__resume { padding: 8px 14px; font-size: .85rem; }

/* ---------------- HERO ---------------- */
.hero { padding-top: 64px; padding-bottom: 40px; }
.hero__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--accent);
  background: var(--accent-soft); border: 1px solid var(--border); padding: 6px 12px; border-radius: 999px;
  margin-bottom: 22px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 60%,transparent);} 70%{box-shadow:0 0 0 8px transparent;} 100%{box-shadow:0 0 0 0 transparent;} }

.hero__title { font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08; font-weight: 800; letter-spacing: -0.02em; }
.grad { background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__lede { color: var(--ink-2); font-size: 1.08rem; max-width: 52ch; margin: 22px 0 28px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__meta { margin-top: 26px; color: var(--muted); font-size: .9rem; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.dot-sep { opacity: .5; }

/* pipeline figure */
.pipeline { position: relative; }
.pipeline svg { width: 100%; height: auto; overflow: visible; }
.node rect { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1.5; }
.node text { fill: var(--ink-2); font-size: 10px; font-weight: 600; text-anchor: middle; font-family: "JetBrains Mono", monospace; }
.node--hub rect { fill: var(--accent-soft); stroke: var(--accent); }
.node--hub text { fill: var(--accent); font-weight: 700; }
.node--out rect { stroke: var(--accent-2); }
.orch rect { fill: var(--surface-2); stroke: var(--border); }
.orch text { fill: var(--muted); font-size: 9.5px; text-anchor: middle; font-family: "JetBrains Mono", monospace; }
.pipeline figcaption { margin-top: 14px; text-align: center; color: var(--muted); font-size: .82rem; font-style: italic; }

/* ---------------- STATS ---------------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  padding-block: 30px 20px; max-width: var(--maxw); margin-inline: auto;
}
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 22px 20px; transition: transform .2s, border-color .2s;
}
.stat:hover { transform: translateY(-4px); border-color: var(--accent); }
.stat__value { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.stat__unit { font-size: 1.1rem; color: var(--accent); margin-left: 2px; }
.stat__label { color: var(--ink-2); font-size: .9rem; margin-top: 8px; }
.stat__delta { font-size: .78rem; margin-top: 8px; font-family: "JetBrains Mono", monospace; }
.stat__delta--good { color: var(--good); }

/* ---------------- SECTIONS ---------------- */
.section { padding-block: 62px; }
.section__title { font-size: 1.7rem; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 34px; display: flex; align-items: baseline; gap: 12px; }
.section__idx { font-family: "JetBrains Mono", monospace; font-size: .95rem; color: var(--accent); font-weight: 600; }

.about { display: grid; gap: 18px; max-width: 74ch; color: var(--ink-2); font-size: 1.05rem; }
.about__lead { font-size: 1.2rem; color: var(--ink); }

/* ---------------- STACK ---------------- */
.stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stack__group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 22px; transition: border-color .2s, transform .2s; }
.stack__group:hover { border-color: var(--accent); transform: translateY(-3px); }
.stack__group h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 14px; }
.stack__group ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.stack__group li {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: "JetBrains Mono", monospace; font-size: .82rem; color: var(--ink);
  background: var(--surface-2); border: 1px solid var(--border); padding: 6px 11px 6px 8px; border-radius: 8px;
  transition: .2s;
}
.stack__group li:hover { color: var(--accent); border-color: var(--accent); }
.ti { width: 15px; height: 15px; flex: none; display: block; }
img.ti { object-fit: contain; }
svg.ti { fill: none; stroke: var(--muted); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.stack__group li:hover svg.ti { stroke: var(--accent); }

/* ---------------- TIMELINE ---------------- */
.timeline { list-style: none; position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--accent), var(--accent-2), transparent); }
.tl { position: relative; padding: 0 0 40px 8px; }
.tl::before { content: ""; position: absolute; left: -28px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); }
.tl__meta { display: flex; gap: 12px; align-items: center; margin-bottom: 6px; flex-wrap: wrap; }
.tl__date { font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--muted); }
.tl__badge { font-size: .72rem; font-weight: 700; color: var(--accent); background: var(--accent-soft); border: 1px solid var(--border); padding: 2px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: .05em; }
.tl__role { font-size: 1.2rem; font-weight: 700; }
.tl__org { color: var(--accent-2); font-weight: 600; font-size: .95rem; margin-bottom: 12px; }
html[data-theme="dark"] .tl__org { color: #7aa7ff; }
.tl__points { list-style: none; display: grid; gap: 9px; }
.tl__points li { position: relative; padding-left: 20px; color: var(--ink-2); }
.tl__points li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }

/* ---------------- CARDS ---------------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 26px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 22px; transition: transform .2s, border-color .2s; }
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card--accent { background: linear-gradient(160deg, var(--accent-soft), transparent); border-color: var(--accent); }
.card__tag { font-family: "JetBrains Mono", monospace; font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
.card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: .92rem; }
.langs { display: flex; gap: 22px; flex-wrap: wrap; color: var(--ink-2); font-size: .92rem; }
.lang strong { color: var(--accent); }

/* ---------------- PROJECTS ---------------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.project { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 24px; transition: transform .2s, border-color .2s; }
.project:hover { transform: translateY(-4px); border-color: var(--accent); }
.project__stack { font-family: "JetBrains Mono", monospace; font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--accent); margin-bottom: 10px; }
.project h3 { font-size: 1.18rem; margin-bottom: 8px; letter-spacing: -.01em; }
.project p { color: var(--ink-2); font-size: .93rem; }
.project__impact { margin-top: 13px; font-size: .88rem; color: var(--ink); background: var(--surface-2); border-left: 3px solid var(--accent); padding: 10px 13px; border-radius: 0 8px 8px 0; }
.project__impact span { display: block; font-weight: 700; color: var(--accent); text-transform: uppercase; font-size: .68rem; letter-spacing: .09em; margin-bottom: 2px; }
code { font-family: "JetBrains Mono", monospace; font-size: .85em; background: var(--surface-2); padding: 1px 5px; border-radius: 5px; }

/* ---------------- CONTACT ---------------- */
.contact { text-align: center; padding-block: 80px; }
.contact__lede { color: var(--ink-2); font-size: 1.15rem; max-width: 48ch; margin: 0 auto 30px; }
.contact .section__title { justify-content: center; }
.contact__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------------- FOOTER ---------------- */
.footer { max-width: var(--maxw); margin: 0 auto; padding: 34px 24px 50px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: .85rem; }
.footer__built { font-family: "JetBrains Mono", monospace; }

/* ---------------- REVEAL ANIM ---------------- */
.section, .stat { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal, .stats.reveal .stat { opacity: 1; transform: none; }
.stats .stat:nth-child(2){transition-delay:.06s}.stats .stat:nth-child(3){transition-delay:.12s}.stats .stat:nth-child(4){transition-delay:.18s}

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 30px; }
  .pipeline { max-width: 320px; margin-inline: auto; order: 1; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stack, .cards { grid-template-columns: repeat(2, 1fr); }
  .nav__links { display: none; }
}
@media (max-width: 520px) {
  .stats, .stack, .cards, .projects { grid-template-columns: 1fr; }
  .nav__name { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .section, .stat { opacity: 1; transform: none; }
}

/* =========================================================
   ARCHITECTURE PAGE
   ========================================================= */
.about__link { color: var(--accent); font-weight: 600; text-decoration: none; white-space: nowrap; }
.about__link:hover { text-decoration: underline; }
.lead-p { color: var(--ink-2); font-size: 1.05rem; max-width: 72ch; margin-bottom: 26px; }
.hint { color: var(--muted); font-size: .85rem; font-style: italic; }

.arch-hero { padding-top: 56px; padding-bottom: 20px; }
.arch-hero .hero__title { font-size: clamp(2.4rem, 6vw, 3.6rem); }
.arch-tagline { max-width: 62ch; font-size: 1.2rem; color: var(--ink); }
.arch-stance { margin-top: 22px; max-width: 74ch; background: var(--surface-2); border-left: 3px solid var(--accent); padding: 16px 18px; border-radius: 0 10px 10px 0; }
.arch-stance p { color: var(--ink-2); font-size: .96rem; }
.arch-stance strong { color: var(--ink); }

/* comparison table */
.cmp-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r); }
.cmp { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 560px; }
.cmp th, .cmp td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.cmp tr:last-child th, .cmp tr:last-child td { border-bottom: none; }
.cmp thead th { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; font-weight: 700; }
.cmp tbody th { color: var(--ink); font-weight: 700; width: 150px; }
.cmp td:nth-child(2) { color: var(--ink-2); }
.cmp td:last-child { color: var(--ink); background: var(--accent-soft); font-weight: 500; }

/* phases */
.phases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.phase { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 24px; transition: transform .2s, border-color .2s; }
.phase:hover { transform: translateY(-3px); border-color: var(--accent); }
.phase__num { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04121a; font-weight: 800; margin-bottom: 14px; }
.phase h3 { font-size: 1.15rem; margin-bottom: 8px; }
.phase p { color: var(--ink-2); font-size: .92rem; }
.phase__out { margin-top: 14px; font-size: .86rem; color: var(--ink); }
.phase__out span, .adr__d span, .adr__c span, .asr-callout__tag { display: block; font-family: "JetBrains Mono", monospace; font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; margin-bottom: 3px; }
.phase__out span { color: var(--accent); }

/* requirements */
.req-types { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 22px; }
.asr-callout { background: linear-gradient(160deg, var(--accent-soft), transparent); border: 1px solid var(--accent); border-radius: var(--r); padding: 24px; }
.asr-callout__tag { color: var(--accent); }
.asr-callout p { color: var(--ink); font-size: 1rem; }

/* criteria */
.criteria { list-style: none; display: grid; gap: 12px; max-width: 80ch; }
.criteria li { padding-left: 22px; position: relative; color: var(--ink-2); }
.criteria li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }
.criteria b { color: var(--ink); }

/* decision records (expandable) */
.adr { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 20px 22px; margin-bottom: 12px; transition: border-color .2s; }
.adr[open] { border-color: var(--accent); }
.adr summary { cursor: pointer; list-style: none; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.adr summary::-webkit-details-marker { display: none; }
.adr__head { flex: 1; }
.adr__head h3 { font-size: 1.12rem; margin-bottom: 10px; }
.adr__d, .adr__c { font-size: .92rem; color: var(--ink-2); margin-top: 8px; }
.adr__d span { color: var(--accent); }
.adr__c span { color: var(--accent-2); }
.adr__chev { color: var(--muted); font-size: 1.4rem; line-height: 1; transition: transform .25s; flex: none; }
.adr[open] .adr__chev { transform: rotate(180deg); }
.adr__body { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); display: grid; gap: 11px; }
.adr__body p { font-size: .92rem; color: var(--ink-2); }
.adr__t { background: var(--surface-2); border-left: 3px solid var(--accent); padding: 11px 13px; border-radius: 0 8px 8px 0; color: var(--ink) !important; }

/* views grid */
.views { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.view { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px; transition: transform .2s, border-color .2s; }
.view:hover { transform: translateY(-3px); border-color: var(--accent); }
.view h4 { font-size: .95rem; margin-bottom: 6px; }
.view p { font-size: .82rem; color: var(--ink-2); }

/* quality attributes */
.qa { display: grid; gap: 10px; }
.qa__row { display: grid; grid-template-columns: 130px 1fr; gap: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; }
.qa__row b { color: var(--accent); }
.qa__row span { color: var(--ink-2); font-size: .92rem; }

/* governance block */
.gov { background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--r); padding: 28px; box-shadow: var(--shadow); }
.gov__lead { font-size: 1.08rem; color: var(--ink); margin-bottom: 18px; }
.gov__list { list-style: none; display: grid; gap: 12px; }
.gov__list li { padding-left: 24px; position: relative; color: var(--ink-2); font-size: .94rem; }
.gov__list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.gov__deliv-label { margin-top: 22px; font-family: "JetBrains Mono", monospace; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.gov__deliv { color: var(--ink-2); font-size: .92rem; margin-top: 4px; }

/* deliverables */
.deliverables { display: flex; flex-wrap: wrap; gap: 10px; }
.deliverables span { background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; font-size: .88rem; color: var(--ink); }

@media (max-width: 860px) {
  .phases, .req-types { grid-template-columns: 1fr; }
  .views { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .views { grid-template-columns: 1fr; }
  .qa__row { grid-template-columns: 1fr; gap: 4px; }
}