/* MUSSA — Makerere University School of Statistics Association */

:root {
  --mussa-700: #1d4ed8;
  --mussa-800: #1e40af;
  --mussa-900: #1e3a8a;
  --navy: #0f2744;
  --ink: #142033;
  --slate: #475569;
  --muted: #64748b;
  --line: rgba(30, 64, 175, 0.14);
  --paper: #f4f7fb;
  --white: #ffffff;
  --accent-soft: #dbe7ff;
  --shadow: 0 18px 50px rgba(15, 39, 68, 0.12);
  --radius: 1rem;
  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "Sora", system-ui, sans-serif;
  --max: 70rem;
  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(30, 64, 175, 0.16), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(29, 78, 216, 0.1), transparent 50%),
    linear-gradient(180deg, #eef3fa 0%, var(--paper) 38%, #e8eef7 100%);
  background-attachment: fixed;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--mussa-800);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--mussa-900);
}

:focus-visible {
  outline: 3px solid var(--mussa-700);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.65rem 1rem;
  background: var(--mussa-900);
  color: var(--white);
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(14px);
  background: rgba(244, 247, 251, 0.82);
  border-bottom: 1px solid var(--line);
  transform: translateY(-100%);
  animation: header-in 0.7s var(--ease) 0.05s forwards;
}

@keyframes header-in {
  to {
    transform: translateY(0);
  }
}

.header-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.logo {
  border-radius: 50%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  background: var(--white);
}

.brand .logo {
  width: 2.5rem;
  height: 2.5rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.68rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 14rem;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--white);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-toggle span {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--navy);
  transition: transform 0.25s var(--ease), opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(0.42rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-0.42rem) rotate(-45deg);
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  display: inline-flex;
  padding: 0.55rem 0.85rem;
  text-decoration: none;
  color: var(--slate);
  font-weight: 500;
  font-size: 0.92rem;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--mussa-900);
  background: var(--accent-soft);
}

main {
  overflow-x: clip;
}

.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: grid;
  align-items: end;
  padding: clamp(2rem, 5vw, 4.5rem) 0 clamp(2.5rem, 6vw, 5rem);
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(15, 39, 68, 0.92) 12%, rgba(30, 64, 175, 0.78) 55%, rgba(30, 58, 138, 0.7) 100%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.14), transparent 40%),
    linear-gradient(160deg, var(--navy), var(--mussa-900));
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, black 30%, transparent 95%);
}

.hero-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.hero-brand .logo {
  width: clamp(4.5rem, 12vw, 6.5rem);
  height: clamp(4.5rem, 12vw, 6.5rem);
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.25));
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 0.95;
  max-width: 12ch;
}

.hero .lede {
  margin: 1.1rem 0 0;
  max-width: 36rem;
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem);
  color: rgba(255, 255, 255, 0.88);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.9rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  border: 2px solid transparent;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: var(--white);
  color: var(--mussa-900);
}

.btn-primary:hover {
  background: var(--accent-soft);
  color: var(--mussa-900);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.btn-solid {
  background: var(--mussa-800);
  color: var(--white);
}

.btn-solid:hover {
  background: var(--mussa-900);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--mussa-800);
  border-color: rgba(30, 64, 175, 0.35);
}

.btn-outline:hover {
  background: var(--accent-soft);
  color: var(--mussa-900);
}

.section {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 1.4rem + 1.6vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.section-head p {
  margin: 0.75rem 0 0;
  color: var(--slate);
}

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

.split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .split.reverse {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .split.reverse > :first-child {
    order: 2;
  }
}

.prose p {
  margin: 0 0 1rem;
  color: var(--slate);
}

.prose p:last-child {
  margin-bottom: 0;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.feature-list li {
  position: relative;
  padding: 1.15rem 1.25rem 1.15rem 3.25rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-list li::before {
  content: attr(data-step);
  position: absolute;
  left: 1rem;
  top: 1.15rem;
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--mussa-800);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
}

.feature-list strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--navy);
}

.feature-list span {
  color: var(--slate);
  font-size: 0.95rem;
}

.band {
  background:
    linear-gradient(135deg, rgba(30, 64, 175, 0.08), rgba(15, 39, 68, 0.04)),
    rgba(255, 255, 255, 0.55);
  border-block: 1px solid var(--line);
}

.band .section {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .band .section {
    grid-template-columns: 1.4fr auto;
    align-items: center;
  }
}

.band h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.2rem);
  color: var(--navy);
}

.band p {
  margin: 0;
  color: var(--slate);
  max-width: 40rem;
}

.band-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(1.5rem, 3vw, 2rem);
}

.page-hero .section {
  padding-top: 0;
  padding-bottom: 0;
}

.page-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 1.6rem + 2vw, 3.4rem);
  line-height: 1.1;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.page-hero p {
  margin: 0.85rem 0 0;
  max-width: 40rem;
  color: var(--slate);
}

.steps {
  counter-reset: vote-step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.steps li {
  counter-increment: vote-step;
  display: grid;
  gap: 0.35rem;
  padding: 1.35rem 1.35rem 1.35rem 4.25rem;
  position: relative;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.steps li::before {
  content: counter(vote-step);
  position: absolute;
  left: 1.15rem;
  top: 1.35rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--mussa-800);
  color: var(--white);
  font-weight: 700;
  font-size: 0.95rem;
}

.steps h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--navy);
}

.steps p {
  margin: 0;
  color: var(--slate);
  font-size: 0.95rem;
}

.callout {
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid rgba(30, 64, 175, 0.2);
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.08), rgba(255, 255, 255, 0.7));
}

.callout h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--navy);
}

.callout p {
  margin: 0;
  color: var(--slate);
}

.prep-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
  counter-reset: none;
}

.prep-step {
  position: relative;
  display: grid;
  gap: 0.45rem;
  padding: 0;
  background: none;
  border: none;
}

.prep-step-num {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  background: var(--mussa-800);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.35rem;
  position: relative;
  z-index: 1;
}

.prep-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.prep-step p {
  margin: 0;
  color: var(--slate);
  font-size: 0.95rem;
  max-width: 28rem;
}

/* Mobile / narrow: vertical spine */
@media (max-width: 799px) {
  .prep-steps {
    gap: 0;
    padding-left: 0.25rem;
  }

  .prep-step {
    padding: 0 0 1.75rem 3.5rem;
  }

  .prep-step:last-child {
    padding-bottom: 0;
  }

  .prep-step-num {
    position: absolute;
    left: 0;
    top: 0;
    margin: 0;
  }

  .prep-step:not(:last-child)::before {
    content: "";
    position: absolute;
    left: 1.2rem;
    top: 2.5rem;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--mussa-800), rgba(30, 64, 175, 0.15));
  }
}

/* Desktop: three columns + horizontal connector under numbers */
@media (min-width: 800px) {
  .prep-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
  }

  .prep-steps::before {
    content: "";
    position: absolute;
    left: calc(16.66% + 1.25rem);
    right: calc(16.66% + 1.25rem);
    top: 1.25rem;
    height: 2px;
    background: linear-gradient(90deg, var(--mussa-800), rgba(30, 64, 175, 0.2), var(--mussa-800));
    z-index: 0;
  }

  .prep-step {
    text-align: left;
  }
}

.support-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .support-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.support-item {
  padding: 1.35rem 1.25rem;
  border-top: 3px solid var(--mussa-800);
  background: rgba(255, 255, 255, 0.65);
}

.support-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: var(--navy);
}

.support-item p {
  margin: 0;
  color: var(--slate);
  font-size: 0.95rem;
}

.site-footer {
  margin-top: clamp(2rem, 5vw, 4rem);
  padding: 2.5rem 0 2rem;
  background: var(--navy);
  color: rgba(255, 255, 255, 0.82);
}

.footer-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  display: grid;
  gap: 1.75rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-brand .logo {
  width: 2.75rem;
  height: 2.75rem;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--white);
}

.footer-brand span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
}

.footer-copy {
  margin: 0;
  max-width: 36rem;
  font-size: 0.92rem;
}

.social-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.social-list a {
  width: 2.65rem;
  height: 2.65rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.2s ease, transform 0.2s var(--ease);
}

.social-list a:hover {
  background: var(--mussa-700);
  transform: translateY(-2px);
  color: var(--white);
}

.social-list img,
.social-list svg {
  width: 1.15rem;
  height: 1.15rem;
}

/* External SVGs don’t inherit currentColor — invert on dark footer */
.site-footer .social-list img {
  filter: brightness(0) invert(1);
}

.social-panel .social-list img {
  filter: none;
}

.social-panel .social-list a:hover img {
  filter: brightness(0) invert(1);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-meta a {
  color: rgba(255, 255, 255, 0.8);
}

/* Social row on light backgrounds (join page CTA) */
.social-panel {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
}

.social-panel h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  color: var(--navy);
}

.social-panel > p {
  margin: 0 0 1rem;
  color: var(--slate);
}

.social-panel .social-list a {
  background: var(--accent-soft);
  color: var(--mussa-900);
  border-color: transparent;
}

.social-panel .social-list a:hover {
  background: var(--mussa-800);
  color: var(--white);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(244, 247, 251, 0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1rem 1rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.25s ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav a {
    width: 100%;
    justify-content: flex-start;
    border-radius: 0.75rem;
  }

  .brand-text span {
    max-width: 10rem;
  }
}

@media (max-width: 520px) {
  .brand-text span {
    display: none;
  }

  .hero {
    align-items: center;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* Landscape phones / short viewports */
@media (orientation: landscape) and (max-height: 500px) {
  :root {
    --header-h: 3.5rem;
  }

  .hero {
    min-height: auto;
    padding-block: 2rem;
    align-items: center;
  }

  .hero h1 {
    font-size: clamp(2rem, 6vw, 3rem);
  }

  .hero-brand .logo {
    width: 3.5rem;
    height: 3.5rem;
  }

  .section {
    padding-block: 2.25rem;
  }
}

@media (orientation: landscape) and (min-width: 700px) and (max-height: 560px) {
  .hero-inner {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem 2rem;
    align-items: center;
  }

  .hero-brand {
    grid-row: span 3;
    margin: 0;
  }

  .hero-actions {
    margin-top: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .site-header,
  .reveal,
  .btn,
  .social-list a,
  .site-nav {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .site-header {
    transform: none;
  }
}