/* Ingenieurbüro M. Sajidman — CESSC site styles */

:root {
  --color-bg: #f5f6f4;
  --color-surface: #ffffff;
  --color-text: #1c222c;
  --color-text-muted: #59606c;
  --color-primary: #15304c;
  --color-primary-dark: #0e2138;
  --color-accent: #b8862f;
  --color-accent-soft: rgba(184, 134, 47, 0.12);
  --color-border: #dfe1dc;
  --color-grid: rgba(21, 48, 76, 0.07);
  --font-sans: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "JetBrains Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 6px;
  --max-width: 1080px;
  --shadow: 0 1px 2px rgba(15, 30, 50, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #12161d;
    --color-surface: #191f29;
    --color-text: #e6e8ec;
    --color-text-muted: #9ea7b4;
    --color-primary: #a9c8e3;
    --color-primary-dark: #d3e4f3;
    --color-accent: #d9ac57;
    --color-accent-soft: rgba(217, 172, 87, 0.14);
    --color-border: #2a313d;
    --color-grid: rgba(169, 200, 227, 0.08);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --color-bg: #12161d;
  --color-surface: #191f29;
  --color-text: #e6e8ec;
  --color-text-muted: #9ea7b4;
  --color-primary: #a9c8e3;
  --color-primary-dark: #d3e4f3;
  --color-accent: #d9ac57;
  --color-accent-soft: rgba(217, 172, 87, 0.14);
  --color-border: #2a313d;
  --color-grid: rgba(169, 200, 227, 0.08);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

* {
  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);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
}

svg .accent {
  stroke: var(--color-accent);
}

svg .accent-fill {
  fill: var(--color-accent);
}

svg .muted {
  stroke: var(--color-text-muted);
}

svg .grid-line {
  stroke: var(--color-grid);
}

svg .label {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1.2;
}

a.brand:hover {
  text-decoration: none;
}

.brand-mark {
  flex: none;
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

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

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 3px;
}

.header-right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.main-nav a {
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
}

.main-nav a:hover {
  background: var(--color-bg);
  text-decoration: none;
}

.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-bg);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.lang-switch a,
.lang-switch span {
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--color-text-muted);
}

.lang-switch a:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.lang-switch .active {
  background: var(--color-primary);
  color: var(--color-surface);
}

/* Hero */
.hero {
  padding: 64px 0 48px;
}

.hero--grid {
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  border-bottom: 1px solid var(--color-border);
  padding: 56px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.15;
  color: var(--color-primary);
  margin: 0 0 16px;
  max-width: 20ch;
}

.hero .lead {
  font-size: 1.12rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 0 24px;
}

.quote {
  border-left: 3px solid var(--color-accent);
  padding: 4px 0 4px 18px;
  margin: 24px 0 0;
  font-style: italic;
  color: var(--color-text);
  max-width: 56ch;
}

.figure {
  margin: 0;
}

.figure svg {
  display: block;
  width: 100%;
  height: auto;
  color: var(--color-primary);
}

.figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 10px;
}

/* Sections */
.section {
  padding: 52px 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section h2 {
  font-size: 1.55rem;
  color: var(--color-primary);
  margin: 0 0 8px;
}

.section .section-intro {
  color: var(--color-text-muted);
  max-width: 68ch;
  margin: 0 0 28px;
}

/* Cards grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card ul {
  margin: 10px 0 0;
  padding-left: 1.1em;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card ul li + li {
  margin-top: 6px;
}

.card .pictogram {
  display: block;
  width: 100%;
  max-width: 200px;
  height: auto;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.card .card-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 6px;
}

/* Index band (links to sub-pages) */
.index-band {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.index-link {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: inherit;
  transition: border-color 0.15s;
}

.index-link:hover {
  text-decoration: none;
  border-color: var(--color-accent);
}

.index-link .card-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.index-link strong {
  display: block;
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.index-link span {
  color: var(--color-text-muted);
  font-size: 0.93rem;
}

.index-link strong::after {
  content: " \2192";
  color: var(--color-accent);
}

.hero--sub {
  padding: 44px 0 40px;
}

.figure--wide {
  margin: 28px 0 8px;
}

.figure--wide svg {
  max-width: 100%;
}

/* Expertise page detail blocks */
.expertise-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 12px 40px;
  align-items: start;
  margin-bottom: 48px;
}

.expertise-block .block-head {
  grid-column: 1 / -1;
}

.expertise-block .figure {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 16px 12px;
}

.expertise-block h2 {
  font-size: 1.35rem;
  color: var(--color-primary);
  margin: 0 0 6px;
}

.expertise-block .subtitle {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.expertise-block ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--color-text-muted);
}

.expertise-block ul li + li {
  margin-top: 8px;
}

/* Stats / at-a-glance */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin: 24px 0 8px;
}

.stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.stat .stat-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat .stat-label {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

/* Profile / about */
.profile {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.profile img {
  width: 150px;
  height: 190px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.profile-text {
  flex: 1 1 320px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.contact-card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

.contact-card dl {
  margin: 0;
}

.contact-card dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-top: 14px;
}

.contact-card dd {
  margin: 2px 0 0;
  font-size: 1.02rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
  margin-top: 24px;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer .legal-links a + a {
  margin-left: 14px;
}

/* Legal pages */
.legal-content h2 {
  color: var(--color-primary);
  margin-top: 34px;
}

.legal-content h2:first-of-type {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--color-text-muted);
}

.legal-content .notice {
  border-left: 3px solid var(--color-accent);
  padding: 4px 0 4px 16px;
}

.legal-content address {
  font-style: normal;
  color: var(--color-text);
  margin: 10px 0;
}

@media (max-width: 820px) {
  .hero-grid,
  .expertise-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .expertise-block {
    gap: 16px;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
  }

  .main-nav {
    margin-left: -12px;
  }

  .brand-tagline {
    font-size: 0.6rem;
    letter-spacing: 0.05em;
  }
}