/* ---------------------------------------------------------------
   navid.studiostreamx.com — personal site
   Typography-first, single column, light/dark aware.
   --------------------------------------------------------------- */

/* ---- tokens ---------------------------------------------------- */

:root {
  color-scheme: light;

  --serif: "Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo,
    Consolas, monospace;

  --bg: #fbfaf7;
  --bg-soft: #f4f2ec;
  --header-bg: rgba(251, 250, 247, 0.82);
  --text: #221f1c;
  --text-muted: #6b655d;
  --text-faint: #948d84;
  --rule: #e4dfd5;
  --rule-strong: #d3ccbf;
  --accent: #a8492a;
  --accent-soft: rgba(168, 73, 42, 0.1);
  --avatar-bg: #efece5;
  --shadow: 0 1px 2px rgba(34, 31, 28, 0.05), 0 8px 24px rgba(34, 31, 28, 0.04);
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #131211;
  --bg-soft: #1c1a18;
  --header-bg: rgba(19, 18, 17, 0.82);
  --text: #eae6df;
  --text-muted: #a7a099;
  --text-faint: #7c756d;
  --rule: #2c2a26;
  --rule-strong: #3d3a35;
  --accent: #e08a5f;
  --accent-soft: rgba(224, 138, 95, 0.14);
  --avatar-bg: #d8d3ca;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.28);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --bg: #131211;
    --bg-soft: #1c1a18;
    --header-bg: rgba(19, 18, 17, 0.82);
    --text: #eae6df;
    --text-muted: #a7a099;
    --text-faint: #7c756d;
    --rule: #2c2a26;
    --rule-strong: #3d3a35;
    --accent: #e08a5f;
    --accent-soft: rgba(224, 138, 95, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.28);
  }
}

/* ---- base ------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (min-width: 640px) {
  body {
    font-size: 1.125rem;
  }
}

p {
  margin: 0 0 1.15rem;
  text-wrap: pretty;
}

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

a {
  color: inherit;
  text-decoration-color: var(--rule-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.011em;
  text-wrap: balance;
}

.wrap {
  width: min(100% - 2.5rem, 44rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg);
  color: var(--text);
  padding: 0.75rem 1rem;
  z-index: 20;
  font-family: var(--mono);
  font-size: 0.8rem;
}

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

/* ---- header ---------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
  .site-header {
    -webkit-backdrop-filter: blur(10px) saturate(1.4);
    backdrop-filter: blur(10px) saturate(1.4);
  }
}

.site-header.is-stuck {
  border-bottom-color: var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 3.75rem;
}

.wordmark {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

.wordmark .dim {
  color: var(--text-faint);
}

.wordmark:hover .dim {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.55rem;
  border-radius: 0.35rem;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--bg-soft);
}

@media (max-width: 560px) {
  .site-nav a[data-optional] {
    display: none;
  }
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-left: 0.35rem;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 0.45rem;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

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

.theme-toggle svg {
  width: 15px;
  height: 15px;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: block;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }
}

/* ---- hero ------------------------------------------------------ */

.hero {
  padding-block: 3.5rem 1rem;
}

@media (min-width: 640px) {
  .hero {
    padding-block: 5rem 1.5rem;
  }
}

.hero-top {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.avatar {
  width: 72px;
  height: 72px;
  flex: none;
  border-radius: 50%;
  object-fit: cover;
  background: var(--avatar-bg);
  box-shadow: var(--shadow);
  filter: grayscale(1) contrast(1.03);
  transition: filter 0.4s ease, transform 0.4s ease;
}

.avatar:hover {
  filter: grayscale(0.15) contrast(1.03);
  transform: scale(1.03);
}

@media (min-width: 640px) {
  .avatar {
    width: 84px;
    height: 84px;
  }
}

.hero h1 {
  font-size: clamp(1.85rem, 6vw, 2.6rem);
  letter-spacing: -0.025em;
  margin-bottom: 0.35rem;
}

.hero-role {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0;
}

.hero-prose {
  font-size: 1.0625rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .hero-prose {
    font-size: 1.1875rem;
  }
}

.hero-prose strong {
  font-weight: 500;
  color: var(--text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  padding: 0.55rem 0.9rem;
  border-radius: 0.45rem;
  border: 1px solid var(--rule);
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease,
    transform 0.18s ease;
}

.btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.btn-primary:hover {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.btn svg {
  width: 13px;
  height: 13px;
  flex: none;
}

/* ---- sections -------------------------------------------------- */

.section {
  padding-block: 3rem;
}

@media (min-width: 640px) {
  .section {
    padding-block: 4rem;
  }
}

.section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.25rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* ---- timeline -------------------------------------------------- */

.timeline {
  list-style: none;
}

.entry {
  position: relative;
  padding-left: 1.65rem;
  padding-bottom: 2.75rem;
  border-left: 1px solid var(--rule);
}

.entry:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.entry::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--rule-strong);
}

.entry.is-current::before {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.entry-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 0 0 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.62rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 0.25rem;
  padding: 0.1rem 0.38rem;
}

.entry-title {
  font-size: 1.2rem;
  margin-bottom: 0.2rem;
}

@media (min-width: 640px) {
  .entry-title {
    font-size: 1.3rem;
  }
}

.entry-org {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
  line-height: 1.6;
}

.entry-org .org-name {
  color: var(--text);
}

.entry-group {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 1.5rem 0 0.7rem;
}

.entry-group:first-of-type {
  margin-top: 0;
}

.points {
  list-style: none;
  display: grid;
  gap: 0.6rem;
  font-size: 1rem;
  color: var(--text-muted);
}

.points li {
  position: relative;
  padding-left: 1.05rem;
  text-wrap: pretty;
}

.points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 1px;
  background: var(--rule-strong);
}

/* ---- rows (skills, languages, education) ----------------------- */

.rows {
  list-style: none;
  border-top: 1px solid var(--rule);
}

.row {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
  padding-block: 1.05rem;
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 620px) {
  .row {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }
}

.row-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.row-value {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0;
}

.row-value .row-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  display: block;
  margin-top: 0.15rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
}

.tag {
  font-family: var(--mono);
  font-size: 0.73rem;
  line-height: 1.5;
  padding: 0.24rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 0.35rem;
  background: var(--bg-soft);
  color: var(--text-muted);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.level {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  border: 1px solid var(--rule);
  border-radius: 0.3rem;
  padding: 0.1rem 0.4rem;
  margin-left: 0.5rem;
  white-space: nowrap;
}

/* ---- certifications (expanding rows) ---------------------------- */

.certs {
  list-style: none;
  border-top: 1px solid var(--rule);
}

.cert {
  border-bottom: 1px solid var(--rule);
}

.cert-heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.cert-toggle {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 1rem 0.25rem;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s ease;
}

.cert-toggle:hover {
  color: var(--accent);
}

.ms-logo {
  width: 17px;
  height: 17px;
  flex: none;
}

.cert-code {
  flex: none;
  width: 4.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.cert-name {
  flex: 1;
  min-width: 0;
  font-size: 1.02rem;
}

.cert-cue {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border: 1px solid var(--rule);
  border-radius: 0.4rem;
  color: var(--text-faint);
  transition: transform 0.3s ease, border-color 0.18s ease, color 0.18s ease;
}

.cert-cue svg {
  width: 13px;
  height: 13px;
}

.cert-toggle:hover .cert-cue {
  border-color: var(--accent);
  color: var(--accent);
}

.cert.is-open .cert-cue {
  transform: rotate(180deg);
  border-color: var(--accent);
  color: var(--accent);
}

/* the 0fr -> 1fr grid row is what animates the height */
.cert-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

.cert.is-open .cert-panel {
  grid-template-rows: 1fr;
}

.cert-panel-inner {
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s 0.34s;
}

.cert.is-open .cert-panel-inner {
  visibility: visible;
  transition-delay: 0s;
}

.cert-body {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.2rem 0.25rem 1.6rem 2.15rem;
}

.cert-badge {
  width: 96px;
  height: 96px;
  flex: none;
}

.cert-detail {
  min-width: 0;
}

.cert-title {
  font-size: 1rem;
  margin: 0 0 0.25rem;
}

.cert-level {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  margin: 0 0 0.8rem;
}

.cert-link {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 1px;
}

.cert-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

@media (max-width: 620px) {
  .cert-toggle {
    gap: 0.65rem;
    align-items: flex-start;
  }

  .ms-logo,
  .cert-cue {
    margin-top: 0.1rem;
  }

  .cert-code {
    width: 4.1rem;
  }

  .cert-body {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding-left: 0.25rem;
  }
}

/* ---- elsewhere ------------------------------------------------- */

.links {
  list-style: none;
  border-top: 1px solid var(--rule);
}

.link-row {
  border-bottom: 1px solid var(--rule);
}

.link-row a,
.link-row button {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  width: 100%;
  padding: 1rem 0.25rem;
  border: 0;
  background: none;
  font: inherit;
  text-align: left;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: padding-left 0.2s ease, color 0.18s ease;
}

.link-row a:hover,
.link-row button:hover {
  color: var(--accent);
  padding-left: 0.6rem;
}

.link-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  width: 6rem;
  flex: none;
}

.link-value {
  font-size: 1rem;
  flex: 1;
  overflow-wrap: anywhere;
}

.link-arrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-faint);
  flex: none;
}

.link-row a:hover .link-arrow,
.link-row button:hover .link-arrow {
  color: var(--accent);
}

.copied .link-arrow::after {
  content: " copied";
  font-size: 0.7rem;
}

/* ---- footer ---------------------------------------------------- */

.site-footer {
  padding-block: 2.5rem 3.5rem;
  border-top: 1px solid var(--rule);
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

.footer-inner p {
  margin: 0;
}

/* ---- motion ---------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(12px);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---- print ----------------------------------------------------- */

@media print {
  .site-header,
  .hero-actions,
  .site-footer,
  .theme-toggle {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
    font-size: 10.5pt;
  }
  .section {
    padding-block: 1rem;
    break-inside: avoid;
  }
  .entry {
    break-inside: avoid;
  }
  a {
    text-decoration: none;
  }
}

/* ---- language pairs -------------------------------------------- */

.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
}

.lang {
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
}

.lang .level {
  margin-left: 0.4rem;
}

/* ---- footer brand lockup --------------------------------------- */

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-faint);
  text-decoration: none;
  transition: color 0.18s ease;
}

.footer-brand:hover {
  color: var(--text);
}

.footer-brand-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

/* proportions taken from the live studiostreamx.com lockup:
   Inter italic 300, -0.06em tracking, mark at 1.22em nudged -0.05em left */
.ssx-logo {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
}

.ssx-logo__wordmark {
  font-family: "Inter", system-ui, Arial, Helvetica, sans-serif;
  font-style: italic;
  font-weight: 300;
  letter-spacing: -0.06em;
  line-height: 1;
}

.ssx-logo__mark {
  display: block;
  width: 1.22em;
  height: 1.22em;
  margin-left: -0.05em;
}