/* Studio folio — Arnold Rurangwa */

:root,
html[data-theme="light"] {
  --bg: #f4f6f9;
  --bg-elevated: #ffffff;
  --bg-alt: #eef1f6;
  --ink: #0f172a;
  --ink-soft: #1e293b;
  --muted: #64748b;
  --line: rgba(15, 23, 42, 0.1);
  --line-strong: rgba(15, 23, 42, 0.18);
  --accent: #16325c;
  --accent-hover: #0f2444;
  --accent-soft: rgba(22, 50, 92, 0.08);
  --accent-glow: rgba(22, 50, 92, 0.14);
  --ring: #2563a8;
  --header-bg: rgba(244, 246, 249, 0.86);
  --portrait-ring: #dbe3ef;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
  --font-display: "Syne", sans-serif;
  --font-body: "Manrope", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --measure: 72rem;
  --space: clamp(1.25rem, 3vw, 2rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0b1220;
  --bg-elevated: #121a2b;
  --bg-alt: #0f1729;
  --ink: #e8eef8;
  --ink-soft: #c5d0e0;
  --muted: #93a0b5;
  --line: rgba(232, 238, 248, 0.1);
  --line-strong: rgba(232, 238, 248, 0.18);
  --accent: #7eb0e8;
  --accent-hover: #a8caf2;
  --accent-soft: rgba(126, 176, 232, 0.12);
  --accent-glow: rgba(126, 176, 232, 0.16);
  --ring: #7eb0e8;
  --header-bg: rgba(11, 18, 32, 0.88);
  --portrait-ring: #243149;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 450;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 90% 55% at 8% -5%, var(--accent-glow), transparent 55%),
    radial-gradient(ellipse 70% 45% at 96% 8%, rgba(37, 99, 168, 0.08), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

html[data-theme="dark"] body {
  background-image:
    radial-gradient(ellipse 90% 55% at 8% -5%, rgba(126, 176, 232, 0.12), transparent 55%),
    radial-gradient(ellipse 70% 45% at 96% 8%, rgba(22, 50, 92, 0.35), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, #070d18 100%);
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

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

.wrap {
  width: min(100% - 2 * var(--space), var(--measure));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand:hover {
  color: inherit;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--line);
}

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

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.brand-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.nav-primary {
  position: relative;
  display: none;
}

.nav-links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 0.45rem 0.7rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 560;
  border-radius: 8px;
}

.nav-links a:hover,
.nav-links a[aria-current="true"] {
  color: var(--ink);
  background: var(--accent-soft);
}

.nav-indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.35s var(--ease), width 0.35s var(--ease);
  pointer-events: none;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--ink);
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  background: var(--accent-soft);
}

html[data-theme="light"] .theme-icon-sun,
html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.72rem 1.15rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 650;
  font-size: 0.92rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

html[data-theme="dark"] .btn-primary {
  color: #0b1220;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

html[data-theme="dark"] .btn-primary:hover {
  color: #0b1220;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  background: var(--accent-soft);
  color: var(--ink);
}

.btn-resume {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--ink);
  padding: 0;
}

.nav-toggle svg {
  width: 1.2rem;
  height: 1.2rem;
}

.nav-drawer {
  display: none;
  border-top: 1px solid var(--line);
  padding: 1rem var(--space) 1.25rem;
  background: var(--bg-elevated);
}

.nav-drawer.is-open,
.nav-drawer:not([hidden]) {
  display: block;
}

.nav-drawer[hidden] {
  display: none !important;
}

.nav-drawer ul {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.nav-drawer a {
  display: block;
  padding: 0.7rem 0.2rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}

.nav-drawer .btn {
  width: 100%;
}

@media (min-width: 920px) {
  .nav-primary {
    display: block;
  }

  .btn-resume {
    display: inline-flex;
  }

  .nav-toggle,
  .nav-drawer {
    display: none !important;
  }
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(3rem, 8vw, 5.5rem);
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: 10% -10% auto auto;
  width: min(48vw, 28rem);
  height: min(48vw, 28rem);
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow), transparent 68%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

@media (min-width: 880px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.hero-kicker {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 8vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.hero-title span {
  color: var(--accent);
}

.hero-line {
  margin: 1.25rem 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.hero-facts {
  list-style: none;
  margin: 2rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 560px) {
  .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }
}

.hero-facts li {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.fact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.hero-facts a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.hero-facts a:hover {
  color: var(--accent);
}

.hero-portrait {
  margin: 0;
  justify-self: center;
  text-align: center;
  max-width: 22rem;
  width: 100%;
}

.hero-portrait img {
  width: min(100%, 22rem);
  aspect-ratio: 1;
  object-fit: cover;
  object-position: center 12%;
  border-radius: 50%;
  border: 6px solid var(--portrait-ring);
  box-shadow: var(--shadow);
  background: var(--bg-alt);
}

.portrait-caption {
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* Sections */
.section {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}

.section-alt {
  background: color-mix(in srgb, var(--bg-alt) 80%, transparent);
  border-block: 1px solid var(--line);
}

.section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  max-width: 40rem;
}

.section-index {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section-lede {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

/* Projects */
.project-board {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .project-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-lead {
    grid-column: 1 / -1;
  }
}

.project {
  padding: 1.35rem 1.4rem 1.45rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.project:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.project-lead {
  display: grid;
  gap: 0.35rem;
  padding: 1.7rem 1.6rem 1.8rem;
  background:
    linear-gradient(135deg, var(--accent-soft), transparent 55%),
    var(--bg-elevated);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.project-slot {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.project-lang {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
}

.project h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.project-lead h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.project p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1rem;
}

.project-links a {
  font-weight: 650;
  font-size: 0.9rem;
  text-decoration: none;
}

.project-links a::after {
  content: " →";
  opacity: 0.7;
}

/* Experience */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.timeline-item {
  display: grid;
  gap: 0.85rem;
  padding: 1.4rem 1.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

@media (min-width: 760px) {
  .timeline-item {
    grid-template-columns: 14rem 1fr;
    gap: 1.75rem;
    padding: 1.6rem 1.7rem;
  }
}

.timeline-dates {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.timeline-place {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
}

.timeline-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.timeline-org {
  margin: 0.25rem 0 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

.timeline-body ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.timeline-body li + li {
  margin-top: 0.35rem;
}

/* Skills */
.skill-matrix {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .skill-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.skill-block {
  padding: 1.35rem 1.35rem 1.45rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.skill-block h3 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.skill-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.skill-tags li {
  padding: 0.38rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  font-size: 0.82rem;
  font-weight: 560;
  color: var(--ink-soft);
}

/* Certificates */
.cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.cert-list li {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.15rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 14px;
}

@media (min-width: 720px) {
  .cert-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.cert-title {
  font-weight: 650;
  color: var(--ink);
}

.cert-org {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

/* About */
.about-layout {
  display: grid;
  gap: 2rem;
}

@media (min-width: 880px) {
  .about-layout {
    grid-template-columns: 1.4fr 0.9fr;
    gap: 2.5rem;
    align-items: start;
  }
}

.about-copy p {
  color: var(--ink-soft);
  max-width: 42rem;
}

.about-copy p + p {
  margin-top: 0.9rem;
}

.edu-card {
  margin-top: 1.75rem;
  padding: 1.35rem 1.4rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
}

.edu-label {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.edu-card h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.edu-meta {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.about-aside {
  display: grid;
  gap: 1rem;
}

.aside-block {
  padding: 1.25rem 1.3rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}

.aside-block h3 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.lang-list,
.interest-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lang-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
  font-weight: 560;
}

.lang-list li:last-child {
  border-bottom: 0;
}

.lang-list li span:last-child {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.interest-list li {
  padding: 0.35rem 0;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.interest-list li:last-child {
  border-bottom: 0;
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.contact-tile {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.2rem 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.contact-tile:hover {
  border-color: var(--line-strong);
  color: inherit;
  transform: translateY(-2px);
}

.contact-tile-static:hover {
  transform: none;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-value {
  font-weight: 650;
  font-size: 0.98rem;
  word-break: break-word;
}

/* Footer */
.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-inner a {
  color: var(--muted);
  text-decoration: none;
}

.footer-inner a:hover {
  color: var(--accent);
}

/* Reveal */
[data-reveal] {
  opacity: 1;
  transform: none;
}

html.js:not([data-reduced-motion]) [data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(14px);
}

html.js [data-reveal] {
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html.js [data-reveal],
  html.js [data-reveal]:not(.is-visible) {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .project:hover,
  .contact-tile:hover,
  .btn-primary:hover {
    transform: none;
  }
}