/* ==========================================================================
   Jarasda Kongsiri — personal site
   Plain CSS, no build step. Edit the custom properties in :root to restyle
   the whole site from one place. See README.md for what each edit does.
   ========================================================================== */

:root {
  color-scheme: dark;

  /* -- palette (dark, default) -- */
  --color-bg: #161826;
  --color-surface: #1e2030;
  --color-text: #e9e9ed;
  --color-muted: #b2b6ca;
  --color-dim: #cfd3e5;
  --color-accent: #9184d9;
  --color-divider: rgba(233, 233, 237, 0.16);
  --color-divider-strong: rgba(233, 233, 237, 0.28);

  /* -- type -- */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    Arial, sans-serif;
  --measure: 62ch; /* comfortable reading width */

  /* -- spacing / radius -- */
  --space-1: 0.35rem;
  --space-2: 0.6rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --radius-md: 8px;
  --radius-lg: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --color-bg: #f3f5fe;
    --color-surface: #e7e9f7;
    --color-text: #292b31;
    --color-muted: #6b6f82;
    --color-dim: #4a4d59;
    --color-accent: #5d5294;
    --color-divider: rgba(41, 43, 49, 0.16);
    --color-divider-strong: rgba(41, 43, 49, 0.28);
  }
}

/* -- reset -- */
* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
}
p {
  margin: 0;
}
img {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
}
ul, ol {
  margin: 0;
  padding: 0;
}
li {
  list-style: none;
}

/* -- accessibility: focus + motion -- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #161826;
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius-md) 0;
  font-size: 14px;
  font-weight: 600;
  z-index: 100;
}
.skip-link:focus-visible {
  left: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* -- layout -- */
.page {
  display: grid;
  grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  max-width: 76rem;
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 6rem) clamp(1.25rem, 5vw, 4rem)
    clamp(3rem, 7vw, 6rem);
}

.rail {
  position: sticky;
  top: clamp(1.25rem, 3vw, 2rem);
  align-self: start;
  max-height: calc(100vh - 2 * clamp(1.25rem, 3vw, 2rem));
  overflow-y: auto;
  animation: rise 0.6s ease-out both;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
}
.rail__eyebrow {
  margin: 0 0 var(--space-3);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.rail__name {
  font-size: clamp(2.25rem, 4.2vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.04;
}
.rail__role {
  margin: var(--space-3) 0 0;
  font-size: 15px;
  letter-spacing: 0.01em;
}
.rail__role a {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.rail__role a:hover {
  color: var(--color-accent);
}
.rail__tagline {
  margin: var(--space-3) 0 0;
  max-width: 30ch;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-muted);
}

.rail-nav {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.rail-nav a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-muted);
}
.rail-nav a::before {
  content: "";
  display: block;
  width: 12px;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
  transition: width 0.2s ease, opacity 0.2s ease;
}
.rail-nav a:hover,
.rail-nav a:focus-visible {
  color: var(--color-accent);
}
.rail-nav a:hover::before,
.rail-nav a:focus-visible::before {
  width: 20px;
  opacity: 1;
}

.main {
  display: flex;
  flex-direction: column;
  gap: clamp(3rem, 6vw, 5.5rem);
  min-width: 0;
}

.section {
  animation: rise 0.6s ease-out both;
}
.section:nth-of-type(1) { animation-delay: 0.05s; }
.section:nth-of-type(2) { animation-delay: 0.1s; }
.section:nth-of-type(3) { animation-delay: 0.15s; }
.section:nth-of-type(4) { animation-delay: 0.2s; }
.section:nth-of-type(5) { animation-delay: 0.25s; }

.section__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 1.75rem);
}
.section__head::before {
  content: "";
  display: block;
  width: 18px;
  height: 1px;
  background: var(--color-accent);
  flex: none;
}
.section__head h2 {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* -- about -- */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(9rem, 14rem);
  gap: clamp(1.5rem, 4vw, 3rem);
}
.about p {
  max-width: var(--measure);
  color: var(--color-dim);
}
.about p + p {
  margin-top: 1.1rem;
}
.about p:first-child {
  font-size: clamp(1.1rem, 1.4vw, 1.3rem);
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.about__text {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.about__portrait {
  align-self: start;
  margin: 0;
}
.about__portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 85%;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.about__bjj-photo {
  margin: clamp(1.1rem, 2vw, 1.5rem) 0 0;
  max-width: 12rem;
}
.about__bjj-photo img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

/* -- mmawarehouse logo -- */
.mmawarehouse-logo__link {
  display: inline-block;
  margin-top: auto;
  padding-top: clamp(1.25rem, 2.5vw, 2rem);
  border-radius: var(--radius-md);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.mmawarehouse-logo__link img {
  width: 100%;
  max-width: 280px;
  height: auto;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.mmawarehouse-logo__link:hover,
.mmawarehouse-logo__link:focus-visible {
  opacity: 0.8;
  transform: scale(1.02);
}

/* -- experience / timeline list -- */
.timeline {
  display: flex;
  flex-direction: column;
}
.timeline li {
  padding: clamp(1rem, 2vw, 1.4rem) 0;
  border-top: 1px solid var(--color-divider);
}
.timeline li:last-child {
  border-bottom: 1px solid var(--color-divider);
}
.timeline .role-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 0.6rem;
  margin-bottom: 0.35rem;
}
.timeline h3 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.timeline .role-meta {
  font-size: 14px;
  color: var(--color-muted);
}
.timeline p {
  max-width: var(--measure);
  color: var(--color-dim);
}

/* -- education (simple list, no description) -- */
.simple-list {
  display: flex;
  flex-direction: column;
  gap: clamp(0.9rem, 2vw, 1.3rem);
}
.simple-list .role-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 0.6rem;
}
.simple-list h3 {
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.simple-list .role-meta {
  font-size: 14px;
  color: var(--color-muted);
}

/* -- hobbies -- */
.hobbies p {
  max-width: var(--measure);
  color: var(--color-dim);
}
.hobbies h3 {
  font-size: 1.05rem;
  margin-bottom: 0.7rem;
}
.hobbies ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0;
  max-width: var(--measure);
}
.hobbies ul li {
  color: var(--color-dim);
  padding-left: 1.1em;
  text-indent: -1.1em;
}
.hobbies ul li::before {
  content: "–  ";
  color: var(--color-accent);
}
.figure-photo {
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
  max-width: 28rem;
}
.figure-photo img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.figure-photo figcaption {
  margin-top: 0.5rem;
  font-size: 13px;
  color: var(--color-muted);
}

/* -- connect -- */
.connect-list {
  display: flex;
  flex-direction: column;
}
.connect-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(0.9rem, 1.8vw, 1.2rem) 0;
  border-top: 1px solid var(--color-divider);
  text-decoration: none;
}
.connect-list a:last-child {
  border-bottom: 1px solid var(--color-divider);
}
.connect-list a:hover,
.connect-list a:focus-visible {
  color: var(--color-accent);
}
.connect-list .connect-value {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  letter-spacing: -0.01em;
}
.connect-list .connect-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
  flex: none;
}

.site-footer {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* -- motion -- */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* -- responsive: collapse to a single column, rail becomes a static header -- */
@media (max-width: 900px) {
  .page {
    grid-template-columns: minmax(0, 1fr);
  }
  .rail {
    position: static;
    max-height: none;
    overflow-y: visible;
  }
  .rail-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem 1.25rem;
    margin-top: var(--space-4);
  }
  .rail-nav a::before {
    display: none;
  }
  .about {
    grid-template-columns: minmax(0, 1fr);
  }
  .about__portrait {
    order: -1;
    max-width: 14rem;
  }
  .mmawarehouse-logo__link {
    margin-top: 0;
    padding-top: clamp(1.25rem, 4vw, 1.75rem);
  }
}

@media (max-width: 520px) {
  .rail__name {
    font-size: clamp(2rem, 10vw, 2.5rem);
  }
}