/* Лев — personal site (бренд Levts). Modern minimalism, dark by default with a light theme toggle,
   restrained motion (parallax blobs + scroll reveals), no build step (plain CSS/JS). */

:root {
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Fraunces", Georgia, serif;
  --radius: 14px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  /* ── motion ──────────────────────────────────────────────────────────────── */
  --motion-fast: 150ms;
  --motion-base: 250ms;
  --motion-slow: 400ms;
  --motion-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-ease-in: cubic-bezier(0.7, 0, 0.84, 0);

  /* ── spacing (8pt grid) ──────────────────────────────────────────────────── */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0c;
  --bg-elevated: #131316;
  --fg: #f5f5f2;
  --fg-muted: #9a9aa3;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --accent: #d9ff5b;
  --accent-fg: #0a0a0c;
  --shadow: rgba(0, 0, 0, 0.45);
  --blob-1: rgba(217, 255, 91, 0.16);
  --blob-2: rgba(120, 140, 255, 0.14);
  --blob-3: rgba(255, 120, 180, 0.10);
  --scrollbar-track: #0a0a0c;
  --scrollbar-thumb: #38383f;

  /* ── shadow / depth ────────────────────────────────────────────────────── */
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 20px -8px rgba(0, 0, 0, 0.5);
  --shadow-elevated: 0 4px 10px rgba(0, 0, 0, 0.45), 0 24px 48px -16px rgba(0, 0, 0, 0.6);

  /* ── status colors ─────────────────────────────────────────────────────── */
  --color-success: #4ade80;
  --color-warning: #f5c04a;
  --color-error: #ff6b6b;
  --color-info: #7db8ff;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #faf9f6;
  --bg-elevated: #ffffff;
  --fg: #16161a;
  --fg-muted: #6b6b74;
  --border: rgba(15, 15, 20, 0.09);
  --border-strong: rgba(15, 15, 20, 0.16);
  --accent: #6b4cff;
  --accent-fg: #ffffff;
  --shadow: rgba(20, 20, 30, 0.10);
  --blob-1: rgba(107, 76, 255, 0.14);
  --blob-2: rgba(255, 140, 66, 0.12);
  --blob-3: rgba(0, 190, 160, 0.10);
  --scrollbar-track: #faf9f6;
  --scrollbar-thumb: #d8d6cf;

  /* ── shadow / depth ────────────────────────────────────────────────────── */
  --shadow-card: 0 1px 2px rgba(20, 20, 30, 0.06), 0 8px 20px -8px rgba(20, 20, 30, 0.12);
  --shadow-elevated: 0 4px 10px rgba(20, 20, 30, 0.08), 0 24px 48px -16px rgba(20, 20, 30, 0.18);

  /* ── status colors ─────────────────────────────────────────────────────── */
  --color-success: #1a9b5c;
  --color-warning: #b5760a;
  --color-error: #d13b3b;
  --color-info: #2f6fce;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

/* ── custom scrollbar — "attention to detail" ─────────────────────────────── */
* { scrollbar-width: thin; scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 999px; border: 2px solid var(--scrollbar-track); }
::-webkit-scrollbar-thumb:hover { background: var(--fg-muted); }

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--accent-fg); }

/* ── ambient background (parallax blobs) ──────────────────────────────────── */
.bg-field {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  will-change: transform;
  transition: background-color 0.4s var(--ease);
}
.blob-a { width: 46vw; height: 46vw; top: -12vw; left: -8vw; background: var(--blob-1); }
.blob-b { width: 38vw; height: 38vw; top: 12vw; right: -10vw; background: var(--blob-2); }
.blob-c { width: 34vw; height: 34vw; bottom: -14vw; left: 22vw; background: var(--blob-3); }
.grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ── nav ───────────────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 0;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), padding 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 12px 0;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { font-family: var(--font-serif); font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.nav-links { display: flex; gap: 28px; font-size: 14px; color: var(--fg-muted); }
.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: var(--fg); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}
.theme-toggle:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.theme-toggle .icon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ── account slot (SSO — filled in by script.js after GET /v1/customer/auth/me) ── */
.account-slot { position: relative; }
.account-login {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-muted);
  transition: color 0.2s;
}
.account-login:hover { color: var(--fg); }
.account-avatar {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}
.account-avatar:hover { transform: translateY(-1px); }
.account-menu {
  position: absolute;
  right: 0;
  top: 46px;
  min-width: 220px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: 0 20px 40px -16px var(--shadow);
  padding: 8px;
  z-index: 60;
}
.account-menu-email {
  padding: 8px 10px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
  word-break: break-word;
}
.account-menu a,
.account-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 9px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--fg);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s;
}
.account-menu a:hover,
.account-menu button:hover { background: var(--border); }

/* ── buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s, border-color 0.25s;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border: 1px solid transparent;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -10px var(--shadow); }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--border-strong); transform: translateY(-2px); }

/* ── layout helpers ───────────────────────────────────────────────────────── */
main { position: relative; z-index: 1; }
.section { max-width: 1080px; margin: 0 auto; padding: 120px 28px; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 14px;
}
.section-title { font-family: var(--font-serif); font-size: clamp(28px, 4vw, 40px); font-weight: 600; margin: 0 0 10px; letter-spacing: -0.01em; }
.section-sub { color: var(--fg-muted); font-size: 15px; margin: 0; }

/* ── hero ──────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 28px;
}
.hero-title {
  font-size: clamp(38px, 6.4vw, 74px);
  line-height: 1.06;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}
.hero-title .serif { font-family: var(--font-serif); font-weight: 600; font-style: italic; color: var(--accent); }
.hero-sub { font-size: clamp(16px, 1.6vw, 19px); color: var(--fg-muted); max-width: 540px; margin: 0 0 36px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-cue {
  position: absolute;
  bottom: 36px; left: 28px;
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ── about ─────────────────────────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: start; }
.portrait {
  aspect-ratio: 1;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg-elevated);
}
.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}
.placeholder-text { color: var(--fg-muted); font-size: 16px; max-width: 60ch; margin: 0 0 28px; }
.fact-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.fact-list li { display: flex; gap: 16px; font-size: 14px; padding: 12px 0; border-top: 1px solid var(--border); }
.fact-list li:first-child { border-top: none; }
.fact-label { width: 110px; flex-shrink: 0; color: var(--fg-muted); }

/* ── projects ──────────────────────────────────────────────────────────────── */
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project-card {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  overflow: hidden;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  padding: 0;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.project-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 24px 48px -20px var(--shadow); }
.project-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.project-art { height: 140px; position: relative; overflow: hidden; }
.project-art::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(135deg, rgba(255,255,255,0.06) 0 2px, transparent 2px 14px);
}
.art-1 { background: linear-gradient(135deg, #6b4cff, #d9ff5b); }
.art-2 { background: linear-gradient(135deg, #ff7a59, #6b4cff); }
.art-3 { background: linear-gradient(135deg, #00beA0, #0a0a0c); }
.art-4 { background: linear-gradient(135deg, #d9ff5b, #00beA0); }
.project-body { padding: 22px 24px 26px; }
.project-body h3 { margin: 0 0 6px; font-size: 19px; font-weight: 600; }
.project-body p { margin: 0 0 14px; color: var(--fg-muted); font-size: 14px; }
.project-link { font-size: 13px; font-weight: 600; color: var(--accent); }

.custom-cta {
  margin-top: 20px;
  padding: 28px 32px;
  border-radius: var(--radius);
  border: 1px dashed var(--border-strong);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.custom-cta h3 { margin: 0 0 6px; font-size: 18px; font-weight: 600; }
.custom-cta p { margin: 0; color: var(--fg-muted); font-size: 14px; max-width: 46ch; }

/* ── project gallery modal ─────────────────────────────────────────────────── */
body.modal-open { overflow: hidden; }
.project-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.project-modal[hidden] { display: none; }
.project-modal-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, #000 62%, transparent);
  backdrop-filter: blur(6px);
  animation: modal-fade 0.25s var(--ease);
}
.project-modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
  max-height: 86vh;
  overflow-y: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: 0 32px 64px -20px var(--shadow);
  animation: modal-pop 0.3s var(--ease);
}
@keyframes modal-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-pop { from { opacity: 0; transform: translateY(14px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.project-modal-close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}
.project-modal-close:hover { border-color: var(--border-strong); transform: rotate(90deg); }
.project-modal-art { height: 180px; }
.project-modal-body { padding: 26px 28px 30px; }
.project-modal-body h3 { margin: 0 0 12px; font-family: var(--font-serif); font-size: 24px; font-weight: 600; }
.project-modal-body p { margin: 0; color: var(--fg-muted); font-size: 15px; line-height: 1.6; }
.project-modal-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

/* ── contact ───────────────────────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.contact-label { display: block; font-size: 12px; color: var(--fg-muted); margin-bottom: 2px; }
.contact-value { display: block; font-size: 14px; font-weight: 600; word-break: break-word; }

/* ── footer ────────────────────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 28px 60px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
}
.site-footer a:hover { color: var(--fg); }

/* ── scroll reveal ─────────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.reveal[data-delay="1"] { --d: 1; }
.reveal[data-delay="2"] { --d: 2; }
.reveal[data-delay="3"] { --d: 3; }
.reveal[data-delay="4"] { --d: 4; }
.reveal[data-delay="5"] { --d: 5; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ── responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .portrait { max-width: 180px; }
  .project-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 88px 20px; }
}