/* ============================================================
   Albert Fedotov — Portfolio site styles
   ============================================================ */

/* ---- Theme: light overrides ---- */
html[data-theme="light"] {
  --bg-marketing: #fafafa;
  --bg-marketing-deep: #ffffff;
  --bg-panel: #f3f3f4;
  --bg-surface: #ffffff;
  --bg-surface-2: #ececee;
  --fg-primary: #08090a;
  --fg-secondary: #2f3338;
  --fg-tertiary: #6b7079;
  --fg-quaternary: #9aa0a8;
  --border-standard: rgba(0, 0, 0, 0.10);
  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-primary: #d8dadd;
  --surface-fill-1: rgba(0, 0, 0, 0.02);
  --surface-fill-2: rgba(0, 0, 0, 0.04);
  --surface-fill-3: rgba(0, 0, 0, 0.06);
}

/* ---- Disable accent ---- */
html[data-accent="off"] {
  --brand-indigo: var(--fg-primary);
  --accent-violet: var(--fg-primary);
  --accent-violet-hover: var(--fg-secondary);
}
html[data-accent="off"] .btn--primary { color: var(--bg-marketing); }
html[data-accent="off"] .eyebrow-dot,
html[data-accent="off"] .case-index,
html[data-accent="off"] .step-n { color: var(--fg-tertiary); }

/* ---- Spacing rhythm tokens ---- */
:root {
  --section-y: 80px;
  --gutter: 32px;
  --content-max: 1160px;
}
@media (max-width: 900px) {
  :root { --section-y: 56px; --gutter: 20px; }
}

/* ---- Base ---- */
html, body { background: var(--bg-marketing); color: var(--fg-primary); }
* { box-sizing: border-box; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }

::selection { background: var(--accent-violet); color: #fff; }

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

/* ============================================================
   Nav
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg-marketing) 70%, transparent);
  border-bottom: 1px solid var(--border-standard);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: var(--fw-medium);
  color: var(--fg-primary);
  font-size: 14px;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  background: var(--brand-indigo);
  color: #fff;
  font-weight: var(--fw-semibold);
  font-size: 13px;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--fg-tertiary);
}
.nav-links a { transition: color 120ms ease; }
.nav-links a:hover { color: var(--fg-primary); }
.nav-cta { height: 32px; }

@media (max-width: 768px) {
  .nav-links { display: none; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 140px 0 120px;
  border-bottom: 1px solid var(--border-standard);
  overflow-x: clip;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  color: var(--fg-tertiary);
  margin-bottom: 32px;
}
.eyebrow-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-violet);
}
.hero-title-xl {
  font-size: clamp(56px, 9vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: var(--fw-medium);
  color: var(--fg-primary);
  margin: 0 0 32px;
  text-wrap: balance;
  animation: heroSlideIn 1.1s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both;
}
@keyframes heroSlideIn {
  from {
    opacity: 0;
    transform: translateX(-12vw);
    letter-spacing: -0.02em;
  }
  to {
    opacity: 1;
    transform: translateX(0);
    letter-spacing: -0.04em;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-title-xl { animation: none; }
}
.hero-sub-lg {
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.55;
  color: var(--fg-secondary);
  max-width: 62ch;
  margin: 0 auto 40px;
  text-wrap: pretty;
}
.hero-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.hero-actions .btn { height: 40px; padding: 0 16px; font-size: 14px; }

/* Centered */
.hero--centered { text-align: center; }
.hero-centered-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero--centered .hero-actions { justify-content: center; }

/* Editorial */
.hero--editorial { padding: 96px 0 120px; }
.editorial-top {
  display: flex;
  justify-content: space-between;
  color: var(--fg-tertiary);
  font-size: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-standard);
  margin-bottom: 64px;
}
.editorial-inner {
  max-width: 880px;
}
.editorial-title {
  font-size: clamp(56px, 8.5vw, 112px);
  letter-spacing: -0.04em;
  line-height: 0.95;
  font-weight: var(--fw-medium);
  margin: 0 0 32px;
}
.hero-title { color: var(--fg-primary); margin: 0; }
.hero-sub {
  font-size: var(--fs-body-lg);
  line-height: 1.6;
  color: var(--fg-secondary);
  max-width: 62ch;
  margin: 0 0 36px;
  text-wrap: pretty;
}

/* ============================================================
   Section header
   ============================================================ */
.section { padding: var(--section-y) 0; border-bottom: 1px solid var(--border-standard); }
.section:last-of-type { border-bottom: none; }
.section-head {
  margin-bottom: 64px;
  max-width: 760px;
}
.section-label-row {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.section-label {
  text-transform: uppercase;
  font-size: 11px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.10em;
  color: var(--fg-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.section-label::before {
  content: "";
  width: 18px; height: 1px;
  background: var(--fg-quaternary);
}
.section-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-quaternary);
}
.section-title {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.022em;
  font-weight: var(--fw-medium);
  color: var(--fg-primary);
  margin: 0;
  text-wrap: balance;
  max-width: 24ch;
}

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 80px;
  align-items: start;
}
.about-photo {
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--border-standard);
  aspect-ratio: 3 / 4;
  position: sticky;
  top: 96px;
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 62ch;
}
.about-text .t-body-lg {
  color: var(--fg-secondary);
  line-height: 1.65;
  margin: 0;
  text-wrap: pretty;
}
.about-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.about-actions .btn { height: 40px; padding: 0 16px; font-size: 14px; }

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-photo { position: static; max-width: 360px; }
}

/* ============================================================
   Cases
   ============================================================ */
.cases-list {
  display: flex;
  flex-direction: column;
  gap: 64px;
}
.case-card {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 48px;
  border-top: 1px solid var(--border-standard);
}
.case-card:first-child { padding-top: 0; border-top: none; }

.case-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.case-label {
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.022em;
  font-weight: var(--fw-medium);
  color: var(--fg-primary);
  margin: 0;
}
.case-period {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-tertiary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.case-grid {
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 64px;
  align-items: start;
}
.case-media {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 96px;
}
.case-video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-standard);
  background: var(--bg-surface);
}
a.case-video { display: block; cursor: pointer; text-decoration: none; }
a.case-video:hover .case-video-play { transform: translate(-50%, -50%) scale(1.06); }
a.case-video:hover .case-video-poster { filter: brightness(0.78); }
.case-video-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter .25s ease;
}
.case-video-play {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  transition: transform .25s ease;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,0.45));
  pointer-events: none;
}
.case-video-hint {
  position: absolute;
  left: 16px; bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  pointer-events: none;
}
.case-meta { display: flex; flex-direction: column; gap: 6px; }
.case-role {
  font-size: 14px;
  color: var(--fg-tertiary);
  line-height: 1.5;
}

.case-body {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 70ch;
}
.case-section { display: flex; flex-direction: column; gap: 10px; }
.case-h {
  font-size: 13px;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-violet);
  margin: 0;
}
html[data-accent="off"] .case-h { color: var(--fg-tertiary); }
.case-p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-secondary);
  margin: 0;
  text-wrap: pretty;
}
.case-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-list li {
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg-secondary);
  padding-left: 18px;
  position: relative;
}
.case-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 1px;
  background: var(--fg-quaternary);
}
.case-results-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.case-region {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-tertiary);
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .case-grid { grid-template-columns: 1fr; gap: 32px; }
  .case-media { position: static; }
  .case-results-split { grid-template-columns: 1fr; }
}

/* ============================================================
   Approach (steps)
   ============================================================ */
.steps {
  display: flex;
  flex-direction: column;
}
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--border-standard);
  align-items: baseline;
}
.step:last-child { border-bottom: 1px solid var(--border-standard); }
.step-n {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-violet);
}
.step-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 70ch;
}
.step-title {
  font-size: 19px;
  font-weight: var(--fw-medium);
  letter-spacing: -0.012em;
  color: var(--fg-primary);
  line-height: 1.3;
}
.step-desc {
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg-secondary);
  text-wrap: pretty;
}

@media (max-width: 700px) {
  .step { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
}

/* ============================================================
   Management
   ============================================================ */
.mgmt-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.mgmt-card {
  background: var(--surface-fill-1);
  border: 1px solid var(--border-standard);
  border-radius: var(--radius-panel);
  padding: 32px;
}
.mgmt-title {
  font-size: 18px;
  font-weight: var(--fw-medium);
  letter-spacing: -0.012em;
  color: var(--fg-primary);
  margin: 0 0 20px;
}
.mgmt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mgmt-list li {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--fg-secondary);
  padding-left: 18px;
  position: relative;
}
.mgmt-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 1px;
  background: var(--fg-quaternary);
}

@media (max-width: 700px) {
  .mgmt-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Contact
   ============================================================ */
.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  background: var(--surface-fill-1);
  border: 1px solid var(--border-standard);
  border-radius: var(--radius-lg);
  padding: 64px;
}
.contact-title {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.022em;
  font-weight: var(--fw-medium);
  color: var(--fg-primary);
  margin: 0 0 20px;
  max-width: 22ch;
  text-wrap: balance;
}
.contact-sub {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-tertiary);
  margin: 0;
  max-width: 50ch;
}
.contact-sub strong {
  color: var(--fg-secondary);
  font-weight: var(--fw-medium);
}
.contact-right { display: flex; flex-direction: column; gap: 0; }
.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: 16px;
}
.contact-row:first-child { border-top: 1px solid var(--border-subtle); }
.contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.contact-link {
  font-size: 16px;
  color: var(--fg-primary);
  font-weight: var(--fw-medium);
  letter-spacing: -0.012em;
  transition: color 120ms ease;
}
.contact-link:hover { color: var(--accent-violet); }
.contact-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.contact-actions .btn { height: 40px; padding: 0 16px; font-size: 14px; }

@media (max-width: 800px) {
  .contact-card { grid-template-columns: 1fr; gap: 32px; padding: 32px; }
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border-standard);
}
.footer-inner {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--fg-tertiary);
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ============================================================
   Buttons (page-level overrides on top of tokens.css)
   ============================================================ */
.btn--primary {
  background: var(--brand-indigo);
  border-color: transparent;
  color: #fff;
}
.btn--primary:hover { background: var(--accent-violet-hover); color: #fff; }