/* ═══════════════════════════════════════════
   ANDREI TIMIRGAEV — PORTFOLIO SITE
   Mobile-first · B&W Minimal · Square Forms
   ═══════════════════════════════════════════ */

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* palette */
  --black: #0a0a0a;
  --dark: #141414;
  --gray-900: #1a1a1a;
  --gray-800: #222;
  --gray-700: #333;
  --gray-600: #555;
  --gray-500: #777;
  --gray-400: #999;
  --gray-300: #bbb;
  --gray-200: #ddd;
  --gray-100: #eee;
  --white: #f5f5f5;
  --pure-white: #fff;
  --accent: #c8ff00;       /* neon lime accent */
  --accent-dim: #a8d600;

  /* typography */
  --ff: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ff-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* spacing */
  --section-py: clamp(4rem, 10vw, 8rem);
  --container-px: clamp(1rem, 4vw, 2rem);
  --gap: clamp(1rem, 3vw, 2rem);

  /* transitions */
  --ease: cubic-bezier(.25, .46, .45, .94);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

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

body {
  font-family: var(--ff);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-300);
  background: var(--black);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { background: none; border: none; color: inherit; cursor: pointer; font: inherit; }
ul, ol { list-style: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.section {
  padding: var(--section-py) 0;
  position: relative;
}

/* ── SECTION HEADER ── */
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-num {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.section-title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--pure-white);
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--gray-500);
  margin-bottom: 2.5rem;
  padding-left: calc(2rem + 1rem); /* align with title */
  font-size: 0.95rem;
}

/* ══════════════════════════
   SCROLL PROGRESS BAR (side)
   ══════════════════════════ */
.scroll-progress {
  position: fixed;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  height: 280px;
}

.scroll-progress svg {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
}

.scroll-track { stroke: var(--gray-800); stroke-width: 4; }
.scroll-fill { stroke: var(--accent); stroke-width: 4; stroke-dasharray: 300; stroke-dashoffset: 300; transition: stroke-dashoffset 0.3s var(--ease); }

.scroll-dots {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  z-index: 1;
}

.scroll-dot {
  width: 12px;
  height: 12px;
  border-radius: 0;
  border: 1.5px solid var(--gray-700);
  background: var(--black);
  position: relative;
  transition: all 0.3s var(--ease);
}

.scroll-dot.active {
  border-color: var(--accent);
  background: var(--accent);
}

.scroll-dot span {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  color: var(--gray-600);
  opacity: 0;
  transition: opacity 0.3s;
  white-space: nowrap;
  pointer-events: none;
}

.scroll-dot:hover span,
.scroll-dot.active span {
  opacity: 1;
}

/* Hide scroll progress on very small screens */
@media (max-width: 600px) {
  .scroll-progress { display: none; }
}

/* ══════════════════════════
   HEADER
   ══════════════════════════ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: transform 0.4s var(--ease);
}

.header.hidden { transform: translateY(-100%); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
  padding: 0 var(--container-px);
  max-width: 1200px;
  margin: 0 auto;
}

.header__logo {
  font-family: var(--ff-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pure-white);
  letter-spacing: -0.02em;
}

.logo-bracket { color: var(--accent); }

.header__nav {
  display: none;
  gap: 2rem;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-400);
  transition: color 0.25s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out);
}

.nav-link:hover,
.nav-link.active { color: var(--pure-white); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.header__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Language switch */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.lang-option {
  padding: 0.15rem 0.35rem;
  color: var(--gray-500);
  transition: all 0.25s;
  cursor: pointer;
}

.lang-option.active {
  color: var(--accent);
  background: rgba(200, 255, 0, 0.08);
}

.lang-divider { color: var(--gray-700); }

/* Burger */
.burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 4px 0;
}

.burger span {
  display: block;
  height: 1.5px;
  background: var(--gray-300);
  transition: all 0.3s var(--ease);
  transform-origin: center;
}

.burger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (min-width: 768px) {
  .header__nav { display: flex; }
  .burger { display: none; }
}

/* ══════════════════════════
   MOBILE MENU
   ══════════════════════════ */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 899;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.mobile-menu__link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-300);
  transition: color 0.3s;
}

.mobile-menu__link:hover { color: var(--accent); }

/* ══════════════════════════
   HERO
   ══════════════════════════ */
.hero {
  min-height: var(--hero-height, 100svh);
  display: flex;
  align-items: center;
  padding-top: 5rem;
  overflow: hidden;
}

@media (max-width: 767px) {
  .hero {
    min-height: auto;
    align-items: flex-start;
    padding-top: 6.5rem;
    padding-bottom: 2.5rem;
  }

  .hero__grid {
    gap: 2rem;
  }
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__tag {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero__title {
  font-size: clamp(2rem, 8vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--pure-white);
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero__accent {
  color: var(--accent);
  position: relative;
}

.hero__sub {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 2rem;
  max-width: 480px;
  letter-spacing: 0.02em;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Code block */
.hero__visual {
  display: none;
}

.hero__code-block {
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  padding: 1.5rem;
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  border-radius: 0;
  position: relative;
  overflow: hidden;
}

.hero__code-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.code-kw { color: #c678dd; }
.code-var { color: #e06c75; }
.code-fn { color: #61afef; }
.code-prop { color: #e5c07b; }
.code-str { color: #98c379; }
.code-num { color: #d19a66; }

/* Scroll hint */
.hero__scroll-hint {
  display: none;
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--gray-600);
  animation: float 2s ease-in-out infinite;
}

@media (min-width: 768px) and (min-height: 600px) {
  .hero__scroll-hint { display: block; }
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

.scroll-ball {
  animation: scrollBall 2s ease-in-out infinite;
}

@keyframes scrollBall {
  0% { cy: 10; opacity: 1; }
  50% { cy: 26; opacity: 0.3; }
  100% { cy: 10; opacity: 1; }
}

/* Floating geometric shapes */
.geo {
  position: absolute;
  border: 1px solid rgba(200, 255, 0, 0.08);
  pointer-events: none;
  z-index: 0;
}

.geo--1 {
  width: 120px;
  height: 120px;
  top: 20%;
  right: 5%;
  transform: rotate(15deg);
  animation: geoFloat1 12s ease-in-out infinite;
}

.geo--2 {
  width: 60px;
  height: 60px;
  bottom: 30%;
  left: 8%;
  transform: rotate(45deg);
  animation: geoFloat2 10s ease-in-out infinite;
}

.geo--3 {
  width: 80px;
  height: 80px;
  top: 60%;
  right: 20%;
  border-color: rgba(200, 255, 0, 0.04);
  animation: geoFloat3 14s ease-in-out infinite;
}

@keyframes geoFloat1 {
  0%, 100% { transform: rotate(15deg) translate(0, 0); }
  33% { transform: rotate(25deg) translate(10px, -15px); }
  66% { transform: rotate(10deg) translate(-5px, 10px); }
}
@keyframes geoFloat2 {
  0%, 100% { transform: rotate(45deg) translate(0, 0); }
  50% { transform: rotate(55deg) translate(-10px, -10px); }
}
@keyframes geoFloat3 {
  0%, 100% { transform: rotate(0deg) translate(0, 0); }
  50% { transform: rotate(10deg) translate(15px, 10px); }
}

@media (min-width: 768px) {
  .hero__grid { grid-template-columns: 1fr 1fr; }
  .hero__visual { display: block; }
}

/* ══════════════════════════
   BUTTONS
   ══════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 255, 0, 0.15);
}

.btn--ghost {
  border-color: var(--gray-700);
  color: var(--gray-300);
}

.btn--ghost:hover {
  border-color: var(--gray-500);
  color: var(--pure-white);
}

.btn--full { width: 100%; }

/* ══════════════════════════
   ABOUT
   ══════════════════════════ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

.about__photo-wrap {
  position: relative;
  width: fit-content;
  margin: 0 auto;
}

.about__photo {
  width: 200px;
  height: 200px;
  overflow: hidden;
  border: 2px solid var(--gray-800);
  position: relative;
}

.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(60%);
  transition: filter 0.5s;
}

.about__photo:hover img { filter: grayscale(0%); }

.about__name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 0.25rem;
}

.about__role {
  font-size: 0.85rem;
  color: var(--accent);
  font-family: var(--ff-mono);
  margin-bottom: 1.25rem;
}

.about__desc {
  color: var(--gray-400);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  line-height: 1.7;
}

.about__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.stack-tag {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--gray-800);
  color: var(--gray-400);
  transition: all 0.25s;
}

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

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: auto 1fr;
    gap: 3.5rem;
    align-items: start;
  }

  .about__photo {
    width: 280px;
    height: 280px;
  }
}

/* ══════════════════════════
   SOLUTIONS
   ══════════════════════════ */
.solutions__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--gray-800);
  border: 1px solid var(--gray-800);
}

.sol-card {
  background: var(--black);
  padding: 2rem 1.5rem;
  transition: background 0.4s;
}

.sol-card:hover {
  background: var(--gray-900);
}

.sol-card__icon {
  width: 48px;
  height: 48px;
  color: var(--gray-500);
  margin-bottom: 1rem;
  transition: color 0.3s;
}

.sol-card:hover .sol-card__icon { color: var(--accent); }

.sol-card__icon svg {
  width: 100%;
  height: 100%;
}

.sol-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pure-white);
  margin-bottom: 0.5rem;
}

.sol-card__text {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
}

@media (min-width: 600px) {
  .solutions__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .solutions__grid { grid-template-columns: repeat(3, 1fr); }
}

/* FOR WHOM */
.for-whom {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--gray-800);
}

.for-whom__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--pure-white);
  margin-bottom: 1.5rem;
}

.for-whom__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.whom-card {
  border: 1px solid var(--gray-800);
  padding: 1.5rem;
  transition: border-color 0.3s;
}

.whom-card:hover {
  border-color: var(--gray-600);
}

.whom-card__icon {
  width: 40px;
  height: 40px;
  color: var(--gray-500);
  margin-bottom: 0.75rem;
}

.whom-card__icon svg { width: 100%; height: 100%; }

.whom-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pure-white);
  margin-bottom: 0.5rem;
}

.whom-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
}

@media (min-width: 600px) {
  .for-whom__grid { grid-template-columns: repeat(2, 1fr); }
}

/* ══════════════════════════
   CASES
   ══════════════════════════ */
.cases {
  background: var(--dark);
}

.cases__grid {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.case-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  border: 1px solid var(--gray-800);
  padding: 1.5rem;
  transition: border-color 0.3s;
}

.case-card:hover {
  border-color: var(--gray-600);
}

.case-card__images {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.case-card__images::-webkit-scrollbar { display: none; }

.case-card__images img {
  width: 140px;
  height: 260px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--gray-800);
  filter: grayscale(30%);
  transition: filter 0.4s, transform 0.4s;
}

.case-card__images img:hover {
  filter: grayscale(0%);
  transform: scale(1.02);
}

.case-card__images--single img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.case-tag {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
  display: block;
}

.case-card__info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 0.5rem;
}

.case-card__info p {
  font-size: 0.85rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.case-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.case-stack span {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--gray-700);
  color: var(--gray-500);
}

.case-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.case-link:hover { border-color: var(--accent); }

@media (min-width: 768px) {
  .case-card {
    grid-template-columns: auto 1fr;
  }

  .case-card__images img {
    width: 160px;
    height: 280px;
  }

  .case-card__images--single img {
    width: 340px;
    height: 280px;
  }
}

/* ══════════════════════════
   PROCESS / HOW I WORK
   ══════════════════════════ */
.process__timeline {
  position: relative;
  padding-left: 2.5rem;
}

.process__timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--gray-800);
}

.process-step {
  position: relative;
  padding-bottom: 2.5rem;
}

.process-step:last-child { padding-bottom: 0; }

.process-step__num {
  position: absolute;
  left: -2.5rem;
  top: 0;
  width: 12px;
  height: 12px;
  background: var(--gray-800);
  border: 2px solid var(--black);
  font-size: 0;
  transition: background 0.3s;
}

.process-step:hover .process-step__num,
.process-step.in-view .process-step__num {
  background: var(--accent);
}

.process-step__content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--pure-white);
  margin-bottom: 0.35rem;
}

.process-step__content p {
  font-size: 0.85rem;
  color: var(--gray-400);
  line-height: 1.7;
  max-width: 500px;
}

.process-step__price {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2rem 0.6rem;
}

/* ══════════════════════════
   CONTACT
   ══════════════════════════ */
.contact {
  background: var(--dark);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 1rem;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  color: var(--pure-white);
  padding: 0.85rem 1rem;
  font-family: var(--ff);
  font-size: 0.9rem;
  transition: border-color 0.3s;
  outline: none;
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8rem !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  color: var(--gray-500) !important;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--accent);
}

.checkbox-label a {
  color: var(--accent);
  text-decoration: underline;
}

.form-status {
  font-size: 0.85rem;
  min-height: 1.5rem;
}

.form-status.success { color: var(--accent); }
.form-status.error { color: #ff4444; }

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-block h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.contact-block a,
.contact-block p {
  font-size: 1rem;
  color: var(--pure-white);
  transition: color 0.25s;
}

.contact-block a:hover { color: var(--accent); }

@media (min-width: 600px) {
  .contact-form { grid-template-columns: 1fr 1fr; }
  .form-group--full { grid-column: 1 / -1; }
}

@media (min-width: 768px) {
  .contact__grid { grid-template-columns: 1fr auto; gap: 4rem; }
}

/* ══════════════════════════
   FOOTER
   ══════════════════════════ */
.footer {
  border-top: 1px solid var(--gray-800);
  padding: 1.5rem 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--gray-600);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__links a {
  font-size: 0.8rem;
  color: var(--gray-500);
  transition: color 0.25s;
}

.footer__links a:hover { color: var(--accent); }

@media (min-width: 600px) {
  .footer__inner { flex-direction: row; justify-content: space-between; }
}

/* ══════════════════════════
   MODALS
   ══════════════════════════ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}

.modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
}

.modal__body {
  position: relative;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  max-width: 640px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 2rem;
  transform: translateY(20px);
  transition: transform 0.4s var(--ease-out);
}

.modal.open .modal__body {
  transform: translateY(0);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  color: var(--gray-500);
  transition: color 0.25s;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal__close:hover { color: var(--pure-white); }

.modal__body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 1.5rem;
}

.modal__body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pure-white);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.modal__content p {
  font-size: 0.85rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

/* ══════════════════════════
   ANIMATIONS (scroll-reveal)
   ══════════════════════════ */
[data-anim] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

[data-anim].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay for grid children */
.solutions__grid [data-anim]:nth-child(2) { transition-delay: 0.08s; }
.solutions__grid [data-anim]:nth-child(3) { transition-delay: 0.16s; }
.solutions__grid [data-anim]:nth-child(4) { transition-delay: 0.24s; }
.solutions__grid [data-anim]:nth-child(5) { transition-delay: 0.32s; }
.solutions__grid [data-anim]:nth-child(6) { transition-delay: 0.4s; }

/* ══════════════════════════
   UTILITY / MISC
   ══════════════════════════ */
::selection {
  background: var(--accent);
  color: var(--black);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--gray-800); }
::-webkit-scrollbar-thumb:hover { background: var(--gray-700); }

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}