/* ============================================================
   phil.ru — «Инженерная тьма»
   Тёмная premium-tech база, teal→green акцент, слэш-акцент.
   Личный бренд Филиппа Дельсаля.
   ============================================================ */

:root {
  /* Поверхности */
  --bg:            #0A0A0B;
  --bg-alt:        #0E0E11;
  --surface:       #131318;
  --surface-2:     #17171D;
  --border:        rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* Текст */
  --text:          #F5F5F7;
  --text-soft:     #B4B4BD;
  --text-muted:    #76767F;

  /* Акцент */
  --teal:          #00E5C0;
  --green:         #17C613;
  --accent:        #00E5C0;
  --gradient:      linear-gradient(100deg, #00E5C0 0%, #17C613 100%);
  --accent-dim:    rgba(0, 229, 192, 0.12);
  --accent-glow:   rgba(0, 229, 192, 0.18);

  /* Типографика */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* Раскладка */
  --maxw: 1120px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 16px;
  --radius-sm: 10px;

  --shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 24px 60px -32px rgba(0,0,0,0.8);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }
h1, h2, h3 { line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; }
strong { color: var(--text); font-weight: 600; }

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

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: #001b16; padding: 10px 16px; border-radius: 0 0 8px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }

/* ---------- Слэш-акцент ---------- */
.slash {
  color: var(--teal);
  font-weight: 800;
  margin-right: 0.08em;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: inline-flex; align-items: baseline; font-weight: 700; letter-spacing: -0.02em; font-size: 1.02rem; }
.brand-slash { color: var(--teal); font-weight: 800; margin-right: 2px; }
.brand-name { color: var(--text); }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  display: inline-block; padding: 8px 12px; border-radius: 8px;
  color: var(--text-soft); font-size: 0.95rem; font-weight: 500;
  transition: color 0.18s ease, background 0.18s ease;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-cta {
  color: #001b16 !important; background: var(--gradient);
  font-weight: 600 !important;
}
.nav-cta:hover { filter: brightness(1.08); background: var(--gradient) !important; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.25s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Sections ---------- */
.section { padding-block: clamp(64px, 9vw, 120px); position: relative; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

.section-title {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  margin-bottom: clamp(28px, 4vw, 48px);
  letter-spacing: -0.03em;
}
.section-lead {
  color: var(--text-soft); font-size: clamp(1rem, 1.6vw, 1.18rem);
  max-width: 60ch; margin-top: -16px; margin-bottom: clamp(28px, 4vw, 44px);
}
.subsection-title {
  font-size: 1.35rem; margin-top: clamp(48px, 6vw, 72px); margin-bottom: 24px;
  color: var(--text);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: clamp(72px, 12vw, 140px);
  padding-bottom: clamp(64px, 10vw, 120px);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(60% 50% at 18% 0%, rgba(0, 229, 192, 0.10), transparent 70%),
    radial-gradient(50% 45% at 92% 12%, rgba(23, 198, 19, 0.08), transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.86rem; letter-spacing: 0.01em;
  color: var(--text-soft); margin-bottom: clamp(20px, 3vw, 32px);
}
.eyebrow .slash { font-family: var(--font-sans); }
.hero-title {
  font-size: clamp(3rem, 11vw, 7rem);
  font-weight: 800; letter-spacing: -0.04em; line-height: 0.95;
  margin-bottom: 28px;
}
.hero-rule {
  width: clamp(120px, 22vw, 240px); height: 4px; border-radius: 4px;
  background: var(--gradient); margin-bottom: 30px;
}
.hero-lead {
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  line-height: 1.45; color: var(--text-soft); max-width: 46ch; font-weight: 400;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: clamp(32px, 5vw, 48px); }

.hero-facts {
  display: flex; flex-wrap: wrap; gap: clamp(20px, 4vw, 48px);
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--border);
}
.hero-facts li { color: var(--text-muted); font-size: 0.96rem; max-width: 22ch; }
.fact-num {
  display: block; font-size: 2rem; font-weight: 800; color: var(--text);
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1; margin-bottom: 6px;
}
.fact-mono {
  display: block; font-family: var(--font-mono); font-size: 1.05rem; font-weight: 500;
  color: var(--teal); margin-bottom: 6px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 999px;
  font-family: inherit; font-size: 1rem; font-weight: 600; cursor: pointer;
  transition: transform 0.16s ease, filter 0.16s ease, background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
  border: 1px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--gradient); color: #001b16; }
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); background: var(--accent-dim); transform: translateY(-1px); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.about-text p { color: var(--text-soft); margin-bottom: 1.1em; max-width: 64ch; }
.about-text a { color: var(--teal); text-decoration: none; border-bottom: 1px solid rgba(0,229,192,0.35); transition: border-color 0.16s ease; }
.about-text a:hover { border-color: var(--teal); }
.about-credo { color: var(--text) !important; font-weight: 500; }

.about-aside {
  position: sticky; top: 96px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
}
.aside-label, .media-source { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); }
.tone-list { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.tone-list li {
  font-size: 0.9rem; color: var(--text-soft);
  padding: 6px 12px; border: 1px solid var(--border-strong); border-radius: 999px;
}
.credo-quote {
  margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--border);
  font-size: 1.15rem; font-style: italic; color: var(--text); line-height: 1.4;
}

/* ---------- Card grids ---------- */
.card-grid { display: grid; gap: 18px; }
.skills-grid   { grid-template-columns: repeat(4, 1fr); }
.projects-grid { grid-template-columns: repeat(3, 1fr); }
.topics-grid   { grid-template-columns: repeat(3, 1fr); }
.articles-grid { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.card h3 { font-size: 1.18rem; margin-bottom: 10px; letter-spacing: -0.02em; }
.card p { color: var(--text-soft); font-size: 0.97rem; line-height: 1.5; }
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }

/* ---------- Projects ---------- */
.project-card { display: flex; flex-direction: column; }
.project-role {
  font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--teal); margin-bottom: 12px;
}
.project-card h3 { font-size: 1.3rem; margin-bottom: 12px; }
.project-card > p { flex: 0 0 auto; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.tags li {
  font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-soft);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 9px;
}
.project-links { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 16px; }
.project-links a { color: var(--teal); font-size: 0.9rem; font-weight: 500; }
.project-links a:hover { text-decoration: underline; }

.project-featured {
  grid-column: span 1;
  background:
    linear-gradient(160deg, rgba(0,229,192,0.07), transparent 55%),
    var(--surface);
  border-color: rgba(0, 229, 192, 0.28);
}

/* ---------- Achievements / Patent ---------- */
.achievements-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(24px, 4vw, 44px); align-items: start; }
.patent-card {
  display: block; position: sticky; top: 96px;
  background: linear-gradient(165deg, rgba(0,229,192,0.10), rgba(23,198,19,0.05) 60%, transparent), var(--surface);
  border: 1px solid rgba(0, 229, 192, 0.3); border-radius: var(--radius);
  padding: 32px; transition: transform 0.2s ease, border-color 0.2s ease;
}
.patent-card:hover { transform: translateY(-3px); border-color: var(--teal); }
.patent-label { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-soft); }
.patent-number {
  font-family: var(--font-mono); font-size: clamp(1.6rem, 4vw, 2.3rem); font-weight: 500;
  margin: 10px 0 18px; letter-spacing: -0.01em;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.patent-name { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 12px; line-height: 1.35; }
.patent-desc { color: var(--text-soft); font-size: 0.95rem; }
.patent-cta { margin-top: 20px; color: var(--teal); font-weight: 600; font-size: 0.92rem; }

.achievements-list { display: grid; gap: 14px; }
.achievements-list li {
  position: relative; padding-left: 26px; color: var(--text-soft); line-height: 1.5;
}
.achievements-list li::before {
  content: "/"; position: absolute; left: 0; top: 0;
  color: var(--teal); font-weight: 800;
}

/* ---------- Topics ---------- */
.topic-card h3 { font-size: 1.1rem; }

/* ---------- Media ---------- */
.media-list { display: grid; gap: 2px; max-width: 860px; }
.media-list li {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 18px;
  padding: 18px 4px; border-bottom: 1px solid var(--border);
}
.media-list li:first-child { border-top: 1px solid var(--border); }
.media-meta { flex: 0 0 170px; color: var(--text-muted); font-size: 0.86rem; }
.media-list a { color: var(--text); font-weight: 500; transition: color 0.16s ease; flex: 1 1 320px; }
.media-list a:hover { color: var(--teal); }

/* ---------- Articles ---------- */
.article-card { padding: 0; }
.article-card a { display: block; padding: 24px; height: 100%; }
.article-card h3 { font-size: 1.06rem; line-height: 1.3; margin-bottom: 10px; transition: color 0.16s ease; }
.article-card:hover h3 { color: var(--teal); }
.articles-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* ---------- Contacts ---------- */
.section-contacts {
  background:
    radial-gradient(60% 70% at 80% 0%, rgba(0,229,192,0.08), transparent 70%),
    var(--bg-alt);
  border-top: 1px solid var(--border);
}
.contacts-primary { display: flex; flex-direction: column; gap: 4px; margin-bottom: 36px; }
.contact-big {
  font-size: clamp(1.5rem, 5vw, 2.6rem); font-weight: 700; letter-spacing: -0.03em;
  color: var(--text); width: fit-content; transition: color 0.16s ease;
}
.contact-big:hover { color: var(--teal); }
.profiles { display: flex; flex-wrap: wrap; gap: 10px; }
.profiles a {
  font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-soft);
  padding: 9px 16px; border: 1px solid var(--border-strong); border-radius: 999px;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}
.profiles a:hover { color: var(--teal); border-color: var(--teal); background: var(--accent-dim); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding-block: 44px; background: var(--bg); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 8px 28px; align-items: center; justify-content: space-between; }
.footer-brand { font-weight: 700; }
.footer-note { color: var(--text-muted); font-size: 0.88rem; flex: 1 1 280px; }
.footer-copy { color: var(--text-muted); font-size: 0.88rem; font-family: var(--font-mono); }

/* ---------- Lead modal ---------- */
.contacts-cta { margin-bottom: 36px; }

.lead-modal {
  position: fixed; inset: 0; z-index: 100;
  align-items: center; justify-content: center;
  padding: 20px; overflow-y: auto;
}
.lead-modal[hidden] { display: none; }
.lead-modal.open { display: flex; }
.lead-overlay {
  position: absolute; inset: 0;
  background: rgba(5, 6, 8, 0.78);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.lead-card {
  position: relative; width: 100%; max-width: 480px; margin: auto;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--radius); padding: clamp(24px, 4vw, 36px);
  box-shadow: var(--shadow);
}
.lead-x {
  position: absolute; right: 16px; top: 14px;
  background: none; border: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 1.1rem; color: var(--text-muted);
  transition: color 0.16s ease;
}
.lead-x:hover { color: var(--text); }
.lead-title { font-size: 1.5rem; margin-top: 10px; letter-spacing: -0.02em; }
.lead-sub { color: var(--text-soft); font-size: 0.95rem; margin-top: 8px; }
.lead-form { margin-top: 22px; display: flex; flex-direction: column; gap: 16px; }
.lead-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.lead-label {
  display: flex; flex-direction: column; gap: 6px;
  font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.04em;
  color: var(--text-muted); text-transform: uppercase;
}
.lead-req { color: var(--teal); }
.lead-input {
  font-family: var(--font-sans); font-size: 1rem; color: var(--text);
  background: var(--bg); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 11px 13px; text-transform: none; letter-spacing: normal;
  transition: border-color 0.16s ease;
}
.lead-input:focus { outline: none; border-color: var(--teal); }
.lead-textarea { resize: vertical; min-height: 96px; }
.lead-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.lead-status { font-size: 0.9rem; color: var(--text-soft); }
.lead-status.err { color: #ff6b6b; }
.lead-or { font-size: 0.85rem; color: var(--text-muted); }
.lead-or a { color: var(--teal); }
.lead-done { text-align: center; padding: 12px 0; }
.lead-check {
  width: 52px; height: 52px; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--gradient); color: #001b16;
  font-size: 1.6rem; font-weight: 700;
}
.lead-done .lead-title { margin-top: 0; }
.lead-done .btn { margin-top: 22px; }
.lead-consent {
  display: flex; gap: 9px; align-items: flex-start;
  font-size: 0.84rem; color: var(--text-soft); line-height: 1.4; cursor: pointer;
}
.lead-consent input {
  margin-top: 2px; width: 16px; height: 16px; flex: 0 0 auto;
  accent-color: var(--teal); cursor: pointer;
}
.lead-consent a { color: var(--teal); }

/* ---------- Legal page (privacy) ---------- */
.legal { max-width: 760px; }
.legal-meta { font-family: var(--font-mono); font-size: 0.84rem; color: var(--text-muted); margin-top: -16px; margin-bottom: 8px; }
.legal h2 { font-size: 1.15rem; margin-top: 32px; margin-bottom: 10px; letter-spacing: -0.01em; }
.legal p { color: var(--text-soft); margin-bottom: 12px; max-width: 70ch; }
.legal a { color: var(--teal); }
.legal-back { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border); }

/* ============================================================
   Адаптив
   ============================================================ */
@media (max-width: 980px) {
  .skills-grid   { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .topics-grid   { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid    { grid-template-columns: 1fr; }
  .about-aside   { position: static; }
  .achievements-grid { grid-template-columns: 1fr; }
  .patent-card   { position: static; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px -20px rgba(0,0,0,0.7);
    padding: 12px var(--gutter) 20px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform 0.22s ease, opacity 0.22s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links li { display: block; }
  .nav-links a { display: block; padding: 12px; font-size: 1.02rem; }
  .nav-cta { text-align: center; margin-top: 6px; padding: 14px !important; }

  .skills-grid, .projects-grid, .topics-grid, .articles-grid { grid-template-columns: 1fr; }
  .hero-facts { flex-direction: column; gap: 22px; }
  .media-meta { flex-basis: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

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