/* Tokens mirror the IEEE Computer Society Malaysia Chapter site (ieeecomputer.my)
   so the student branch reads as part of the same family. */
:root {
  --c-ink:          #0d1b2a;
  --c-ink-soft:     #2d3f52;
  --c-muted:        #5b6878;
  --c-bg:           #ffffff;
  --c-bg-soft:      #f4f7fb;
  --c-border:       #e3e8f0;
  --c-accent:       #00629b;
  --c-accent-dark:  #004a78;
  --c-accent-light: #e4f0f9;
  --c-orange:       #e87722;
  --c-hero:         #071b2d;
  --max-w:          72rem;
  --radius:         10px;
  --radius-lg:      16px;
  --shadow-sm:      0 1px 3px rgba(7,27,45,.08), 0 1px 2px rgba(7,27,45,.05);
  --shadow:         0 12px 32px rgba(7,27,45,.12), 0 3px 8px rgba(7,27,45,.07);
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition: 0.22s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.6;
}
a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-accent-dark); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5rem; letter-spacing: -.025em; text-wrap: balance; }
p { margin: 0 0 1rem; text-wrap: pretty; }
section[id] { scroll-margin-top: 4.5rem; }

:focus-visible { outline: 3px solid #f4a340; outline-offset: 4px; border-radius: 3px; }
.skip-link { position: fixed; top: .75rem; left: .75rem; z-index: 30; padding: .7rem 1rem; background: #fff; color: var(--c-ink); font-weight: 700; transform: translateY(-160%); transition: transform var(--transition); }
.skip-link:focus { transform: translateY(0); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1rem; }
.section { padding: 5rem 0 5.5rem; }
.section--soft { background: var(--c-bg-soft); }
.eyebrow {
  display: inline-block;
  font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--c-accent); margin-bottom: .5rem;
}
.section__head { display: flex; justify-content: space-between; align-items: end; gap: 2rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.section__head h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.lead { color: var(--c-muted); max-width: 40rem; }

/* Header */
/* Dark header: the IEEE CS logo has white text, so it needs a dark ground.
   The UM logo is the official white mono version for dark backgrounds. */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--c-hero); border-bottom: 1px solid rgba(255,255,255,.08); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 4.5rem; }
.brand { display: flex; align-items: center; gap: .75rem; }
.brand__ieee { height: 2.4rem; width: auto; display: block; }
.brand__um { display: flex; align-items: center; padding-left: .75rem; border-left: 1px solid rgba(255,255,255,.2); }
.brand__um img { height: 2.1rem; width: auto; display: block; }
.brand__label { color: #c9d6e2; font-size: .75rem; font-weight: 700; line-height: 1.15; text-transform: uppercase; letter-spacing: .06em; padding-left: .75rem; border-left: 1px solid rgba(255,255,255,.2); }
.nav { display: flex; gap: 1.5rem; }
.nav a { position: relative; color: #c9d6e2; font-weight: 600; font-size: .95rem; }
.nav a:hover { color: #fff; }
.nav a[aria-current="location"] { color: #fff; }
.nav a[aria-current="location"]::after { content: ""; position: absolute; right: 0; bottom: -.55rem; left: 0; height: 2px; background: var(--c-orange); }
.nav-toggle { display: none; width: 2.75rem; height: 2.75rem; place-items: center; background: none; border: 0; cursor: pointer; color: #fff; }
.nav-toggle svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .35rem; padding: .8rem 1.25rem; border-radius: var(--radius); font-weight: 700; line-height: 1.35; transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition); }
.btn--primary { background: var(--c-orange); color: var(--c-hero); }
.btn--primary:hover { background: #f4a340; color: var(--c-hero); transform: translateY(-2px); }
.btn--ghost { border: 1px solid rgba(255,255,255,.35); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.1); color: #fff; }
.btn--light { background: #fff; color: var(--c-accent-dark); box-shadow: var(--shadow-sm); }
.btn--light:hover { background: var(--c-accent-light); color: var(--c-accent-dark); transform: translateY(-2px); }
.btn:active { transform: translateY(1px); }

/* Hero */
.hero { position: relative; background: linear-gradient(100deg, rgba(7,27,45,.96) 0%, rgba(7,27,45,.82) 48%, rgba(0,74,120,.42) 100%), url("../images/hero-fsktm.webp") center 40% / cover no-repeat, var(--c-hero); color: #fff; padding: 6rem 0 4.75rem; }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 75% 20%, rgba(255,255,255,.07), transparent 26%); }
.hero .container { position: relative; z-index: 1; }
.hero .eyebrow { color: #f4a340; }
.hero h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); max-width: 48rem; letter-spacing: -.04em; }
.hero p { color: #c9d6e2; max-width: 38rem; font-size: 1.1rem; }
.hero__actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.hero__pillars { display: flex; gap: 2rem; flex-wrap: wrap; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.15); color: #c9d6e2; font-weight: 600; }
.hero__pillars span b { color: #f4a340; margin-right: .4rem; }

/* Principles */
.principles { display: grid; grid-template-columns: 1.15fr 1fr 1fr; border-top: 1px solid var(--c-border); }
.principle { padding: 2rem 2rem 0 0; }
.principle + .principle { padding-left: 2rem; border-left: 1px solid var(--c-border); }
.principle h3 { font-size: 1.25rem; margin-top: .35rem; }
.principle p { color: var(--c-muted); max-width: 21rem; margin: 0; }

/* Cards */
.grid { display: grid; gap: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); }
.card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-sm); transition: var(--transition); }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card__num { font-weight: 800; color: var(--c-orange); }
.card h3 { font-size: 1.15rem; margin-top: .25rem; }
.card p { color: var(--c-muted); margin: 0; }
.tag { display: inline-block; font-size: .75rem; font-weight: 700; padding: .25rem .6rem; border-radius: 4px; background: var(--c-accent-light); color: var(--c-accent-dark); margin-right: .5rem; }
.event__date { font-size: .85rem; color: var(--c-muted); font-weight: 600; }
.event h3 { margin: .6rem 0 .4rem; }
.event a.more { display: inline-block; margin-top: 1rem; font-weight: 700; }

/* Events */
.events-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(17rem, .8fr); gap: 1.25rem; align-items: stretch; }
.event-feature { display: flex; align-items: end; justify-content: space-between; gap: 2rem; min-height: 19rem; padding: 2.5rem; color: #fff; background: linear-gradient(140deg, var(--c-accent-dark), var(--c-accent)); border-radius: var(--radius-lg); box-shadow: 0 16px 38px rgba(0,74,120,.18); }
.event-feature > div { max-width: 34rem; }
.event-feature .tag { background: rgba(255,255,255,.14); color: #fff; }
.event-feature .event__date { margin: 1rem 0 .4rem; color: #c9e3f3; text-transform: uppercase; letter-spacing: .08em; }
.event-feature h3 { font-size: clamp(1.65rem, 3vw, 2.45rem); }
.event-feature p { color: #d6e8f5; margin-bottom: 0; }
.event-feature .btn { flex: 0 0 auto; }
.event-update { display: flex; flex-direction: column; justify-content: space-between; gap: 2rem; padding: 2rem; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-lg); }
.event-update__mark { display: grid; place-items: center; width: 3.5rem; height: 3.5rem; border-radius: 12px; background: var(--c-accent-light); color: var(--c-accent-dark); font-weight: 800; letter-spacing: -.03em; }
.event-update p { color: var(--c-muted); }
.more { font-weight: 700; }

/* Leadership */
.leadership { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(18rem, .7fr); gap: 1.25rem; }
.advisor { display: flex; align-items: center; gap: 1.75rem; padding: 2rem; background: var(--c-bg-soft); border-radius: var(--radius-lg); }
.avatar { flex: 0 0 auto; width: 6rem; height: 6rem; border-radius: 18px; display: block; object-fit: cover; object-position: 50% 22%; box-shadow: 0 6px 18px rgba(7,27,45,.16); }
.advisor .role { margin-bottom: .25rem; color: var(--c-accent); font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.advisor h3 { font-size: 1.35rem; }
.advisor p:last-child, .committee-note p { color: var(--c-muted); margin-bottom: 0; }
.committee-note { padding: 2rem; border: 1px solid var(--c-border); border-radius: var(--radius-lg); }
.committee-note a { display: inline-block; margin-top: .75rem; font-weight: 700; }

/* Parent chapter strip */
.parent { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2rem; align-items: center; }
.parent ul { margin: 0; padding-left: 1.1rem; color: var(--c-ink-soft); }
.parent li { margin-bottom: .4rem; }

/* CTA */
.cta { display: grid; grid-template-columns: .8fr 1.2fr; gap: 3rem; background: var(--c-hero); color: #fff; border-radius: var(--radius-lg); padding: 3rem; }
.cta .eyebrow { color: #f4a340; }
.cta h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.cta__intro > p { color: #b8c9d8; max-width: 30rem; }
.join-steps { display: grid; gap: .75rem; margin: 0; padding: 0; list-style: none; counter-reset: none; }
.join-steps li { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; gap: 1rem; align-items: center; padding: 1.25rem; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1); border-radius: 12px; }
.join-steps li > span { align-self: start; color: #f4a340; font-weight: 800; font-variant-numeric: tabular-nums; }
.join-steps h3 { font-size: 1.05rem; }
.join-steps p { color: #b8c9d8; margin: 0; font-size: .9rem; }
.join-steps .btn { min-width: 10.5rem; }

/* Footer */
.site-footer { background: var(--c-hero); color: #9fb2c4; padding: 3.5rem 0 1.5rem; font-size: .95rem; }
.site-footer h4 { color: #fff; margin: 0 0 .75rem; }
.site-footer a { color: #c9d6e2; }
.site-footer a:hover { color: #fff; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.footer__logos { display: flex; align-items: center; gap: .75rem; margin-bottom: 1.25rem; }
.footer__grid ul { list-style: none; margin: 0; padding: 0; }
.footer__grid li { margin-bottom: .4rem; }
.footer__bottom { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255,255,255,.1); font-size: .85rem; }

@media (max-width: 760px) {
  .nav { display: none; position: absolute; top: 4.5rem; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--c-hero); border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav.is-open { display: flex; }
  .nav a { padding: .9rem 1rem; border-top: 1px solid rgba(255,255,255,.08); }
  .nav a[aria-current="location"]::after { display: none; }
  .brand { gap: .5rem; }
  .brand__ieee { height: 2rem; }
  .brand__um img { height: 1.75rem; }
  .brand__label { display: none; }
  .nav-toggle { display: grid; }
  .hero { padding: 4.5rem 0 3.5rem; background-position: 58% 40%; }
  .hero h1 { font-size: clamp(2.1rem, 10vw, 3rem); }
  .hero__actions .btn { width: 100%; }
  .hero__pillars { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem 1rem; margin-top: 2.25rem; }
  .hero__pillars span:last-child { grid-column: 1 / -1; }
  .principles { grid-template-columns: 1fr; }
  .principle, .principle + .principle { padding: 1.5rem 0; border-left: 0; border-bottom: 1px solid var(--c-border); }
  .events-layout, .leadership, .cta, .parent, .footer__grid { grid-template-columns: 1fr; }
  .event-feature { min-height: 0; padding: 2rem; flex-direction: column; align-items: flex-start; }
  .event-feature .btn { width: 100%; }
  .advisor { align-items: flex-start; }
  .avatar { width: 4.5rem; height: 4.5rem; border-radius: 14px; }
  .cta { gap: 1.5rem; padding: 2rem 1.25rem; }
  .join-steps li { grid-template-columns: 1.75rem 1fr; }
  .join-steps .btn { grid-column: 1 / -1; width: 100%; }
  .section { padding: 3.75rem 0 4.25rem; }
}

@media (max-width: 390px) {
  .brand__um { padding-left: .5rem; }
  .brand__ieee { height: 1.8rem; }
  .brand__um img { height: 1.55rem; }
  .advisor { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}