:root {
  --bg-0: #060a15;
  --bg-1: #0a1226;
  --bg-2: #0f1a35;
  --line: #1e335a;
  --line-bright: #00e5ff;
  --text: #e9f3ff;
  --text-soft: #b9ccdf;
  --accent: #09d6ff;
  --success: #34f6a2;
  --warning: #ff6d6d;
  --panel: rgba(8, 18, 35, 0.86);
  --shadow: 0 20px 56px rgba(2, 8, 20, 0.48);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Rajdhani", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 650px at 8% -8%, rgba(0, 229, 255, 0.24), transparent 58%),
    radial-gradient(850px 520px at 90% 0%, rgba(13, 91, 255, 0.22), transparent 58%),
    linear-gradient(170deg, var(--bg-0) 0%, var(--bg-1) 52%, var(--bg-2) 100%);
}

.page-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.brand-title {
  color: var(--line-bright);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-subtitle {
  color: var(--text-soft);
  font-size: 1rem;
}

.readme-badge {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  border-radius: 999px;
  border: 1px solid #4e5966;
  background: #0f1722;
  text-decoration: none;
  overflow: hidden;
  transition: transform 140ms ease, filter 140ms ease;
}

.readme-badge:hover,
.readme-badge:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.readme-badge-left,
.readme-badge-right {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 13px;
  font-size: 0.92rem;
  font-weight: 700;
}

.readme-badge-left {
  background: #0f1722;
  color: #f2f6fc;
  border-right: 1px solid #4e5966;
}

.readme-badge-right {
  background: linear-gradient(90deg, #1c9cff, #15d6ff);
  color: #021723;
}

main {
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

.hero-card,
.contact-card,
.preview-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
}

.offline-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid #ff7d7d;
  color: #ffe4e4;
  background: rgba(183, 30, 48, 0.42);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
}

.hero-card h1 {
  margin: 14px 0 10px;
  font-size: clamp(1.72rem, 2.9vw, 2.65rem);
  line-height: 1.1;
}

.hero-card p,
.preview-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.55;
  max-width: 72ch;
}

.contact-card h2,
.preview-card h2 {
  margin: 0 0 12px;
  font-size: 1.42rem;
}

#demo-form {
  display: grid;
  gap: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--text-soft);
  font-size: 0.98rem;
}

input,
textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #314f7f;
  background: rgba(6, 15, 28, 0.94);
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(0, 229, 255, 0.38);
  border-color: var(--line-bright);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

button[type="submit"] {
  border: 0;
  border-radius: 10px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 700;
  color: #001f2b;
  background: linear-gradient(90deg, #00ebff, #11b9ff);
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease;
}

button[type="submit"]:hover,
button[type="submit"]:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

button[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-hint {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.94rem;
}

.form-status {
  min-height: 1.28rem;
  margin: 0;
  font-weight: 600;
}

.form-status.success {
  color: var(--success);
}

.form-status.error {
  color: var(--warning);
}

.preview-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

figure {
  margin: 0;
  border: 1px solid #273f67;
  border-radius: 12px;
  background: rgba(6, 14, 28, 0.92);
  overflow: hidden;
  transition: transform 140ms ease, border-color 140ms ease;
}

figure:hover {
  transform: translateY(-2px);
  border-color: #44d8ff;
}

figure img {
  display: block;
  width: 100%;
  height: 294px;
  object-fit: cover;
  cursor: zoom-in;
}

figcaption {
  padding: 10px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(3, 10, 20, 0.85);
  backdrop-filter: blur(3px);
}

.lightbox.open {
  display: flex;
}

.lightbox-figure {
  width: min(1400px, 98vw);
  margin: 0;
  border: 1px solid #3a5581;
  border-radius: 14px;
  overflow: hidden;
  background: #071225;
}

.lightbox-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 82vh;
  margin: 0 auto;
  object-fit: contain;
  background: #030a14;
}

.lightbox-figure figcaption {
  padding: 12px 14px;
  font-size: 0.96rem;
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  border: 1px solid #4a6c9b;
  border-radius: 10px;
  background: #081325;
  color: var(--text);
  font: inherit;
  font-weight: 700;
  padding: 8px 12px;
  cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  border-color: #71dbff;
}

body.lightbox-open {
  overflow: hidden;
}

@media (max-width: 920px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .field-grid,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  figure img {
    height: 260px;
  }
}