:root {
  --ink: #000000;
  --charcoal: #252729;
  --panel: #2b2d2f;
  --gold: #c79a45;
  --champagne: #f2dfa7;
  --text: #f4f4f4;
  --secondary: #c9cdd1;
  --muted: #7a7d80;
  --border-gold: rgba(199, 154, 69, 0.35);
  --gold-gradient: linear-gradient(135deg, #7a5522 0%, #c79a45 45%, #f2dfa7 100%);
  --luxury-gradient: radial-gradient(circle at top, #2b2d2f 0%, #111214 45%, #000000 100%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.hidden {
  display: none !important;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(18px);
  background: rgba(0, 0, 0, 0.92);
  border-bottom: 1px solid var(--border-gold);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  left: 0;
  padding: 16px clamp(16px, 4vw, 56px);
  position: sticky;
  right: 0;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  color: var(--champagne);
  display: inline-flex;
  gap: 12px;
  font-family: "Playfair Display", serif;
  font-size: 22px;
  white-space: nowrap;
}

.brand img {
  border: 1px solid var(--border-gold);
  border-radius: 999px;
  height: 44px;
  object-fit: cover;
  width: 44px;
}

nav {
  display: flex;
  gap: 22px;
  color: var(--secondary);
  font-size: 14px;
}

nav a:hover,
.auth-switch a:hover {
  color: var(--champagne);
}

.header-actions {
  align-items: center;
  display: flex;
  gap: 10px;
}

.user-pill,
.badge {
  border: 1px solid var(--border-gold);
  border-radius: 999px;
  color: var(--champagne);
  display: inline-flex;
  font-size: 12px;
  font-weight: 700;
  padding: 8px 12px;
}

.button {
  align-items: center;
  background: var(--gold-gradient);
  border: 0;
  border-radius: 8px;
  color: #070707;
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  transition: filter 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover {
  box-shadow: 0 0 28px rgba(199, 154, 69, 0.3);
  filter: brightness(1.06);
}

.button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.55);
  opacity: 0.55;
}

.button-small {
  min-height: 40px;
  padding: 0 16px;
}

.button-secondary {
  background: transparent;
  border: 1px solid var(--border-gold);
  color: var(--champagne);
}

.button-hidden {
  display: none;
  margin-top: 18px;
}

.hero {
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(199, 154, 69, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 154, 69, 0.1) 1px, transparent 1px),
    var(--luxury-gradient);
  background-position: center, center, center;
  background-size: 48px 48px, 48px 48px, cover;
  display: grid;
  gap: 40px;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  overflow: hidden;
  padding: clamp(58px, 8vw, 118px) clamp(16px, 4vw, 56px);
  position: relative;
}

.hero::before {
  background: radial-gradient(circle, rgba(242, 223, 167, 0.13), transparent 64%);
  content: "";
  height: 460px;
  pointer-events: none;
  position: absolute;
  right: 4vw;
  top: 70px;
  width: 460px;
}

.hero-copy,
.hero-studio-card {
  position: relative;
}

.hero h1,
.section h2,
.auth-card h1 {
  font-family: "Playfair Display", serif;
  line-height: 1.04;
  margin: 0;
}

.hero h1 {
  font-size: clamp(44px, 7vw, 86px);
  max-width: 980px;
}

.section h2 {
  font-size: clamp(34px, 4.5vw, 58px);
}

.auth-card h1 {
  font-size: clamp(34px, 5vw, 56px);
}

.eyebrow {
  color: var(--gold);
  font-family: "Space Grotesk", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.subhead,
.section-copy {
  color: var(--secondary);
  font-size: 18px;
  line-height: 1.75;
  max-width: 780px;
}

.hero-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.trust-strip span {
  background: rgba(43, 45, 47, 0.75);
  border: 1px solid var(--border-gold);
  border-radius: 999px;
  color: var(--secondary);
  font-size: 13px;
  padding: 10px 14px;
}

.hero-studio-card,
.panel,
.preview-panel,
.feature-grid article,
.price-grid article,
.manual,
.auth-card {
  background: rgba(43, 45, 47, 0.92);
  border: 1px solid var(--border-gold);
  border-radius: 14px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  padding: 24px;
}

.studio-topline {
  align-items: center;
  color: var(--secondary);
  display: flex;
  justify-content: space-between;
}

.studio-topline strong {
  color: var(--champagne);
}

.cad-board {
  background:
    linear-gradient(rgba(242, 223, 167, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 223, 167, 0.14) 1px, transparent 1px),
    #050505;
  background-size: 34px 34px;
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  display: grid;
  gap: 10px;
  grid-template-columns: 1.2fr 0.8fr;
  margin: 20px 0;
  min-height: 330px;
  padding: 18px;
}

.room {
  align-items: center;
  border: 1px solid rgba(242, 223, 167, 0.58);
  color: var(--champagne);
  display: flex;
  font-family: "Space Grotesk", sans-serif;
  justify-content: center;
}

.room-a {
  grid-row: span 2;
}

.room-d {
  min-height: 72px;
}

.fine-print {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.section {
  background: var(--ink);
  padding: 76px clamp(16px, 4vw, 56px);
}

.studio-section,
.section:nth-of-type(4) {
  background: var(--luxury-gradient);
}

.feature-grid,
.price-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
}

.feature-grid strong,
.card-label {
  color: var(--gold);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.feature-grid h3,
.price-grid h3,
.usage-card h3 {
  font-family: "Space Grotesk", sans-serif;
  margin: 10px 0;
}

.feature-grid p,
.price-grid p {
  color: var(--secondary);
  line-height: 1.65;
}

.converter-layout {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
}

.panel,
.auth-form,
.manual-form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--champagne);
  font-family: "Space Grotesk", sans-serif;
  font-size: 14px;
}

input,
select,
textarea {
  background: #000000;
  border: 1px solid var(--border-gold);
  border-radius: 8px;
  color: var(--text);
  min-height: 46px;
  padding: 0 14px;
}

textarea {
  min-height: 110px;
  padding-top: 12px;
  resize: vertical;
}

input:hover,
select:hover,
textarea:hover,
input:focus,
select:focus,
textarea:focus {
  border-color: rgba(242, 223, 167, 0.64);
  outline: none;
}

.form-grid,
.scale-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, 1fr);
}

.scale-grid {
  grid-template-columns: repeat(3, 1fr);
}

.notice,
.status {
  border-radius: 8px;
  color: var(--secondary);
  line-height: 1.5;
}

.notice {
  background: rgba(199, 154, 69, 0.08);
  border: 1px solid var(--border-gold);
  padding: 12px;
}

.notice.success {
  border-color: rgba(242, 223, 167, 0.62);
  color: var(--champagne);
}

.status {
  min-height: 22px;
}

.preview-panel {
  align-self: start;
}

.usage-card {
  border-bottom: 1px solid var(--border-gold);
  margin-bottom: 20px;
  padding-bottom: 18px;
}

.preview-box {
  align-items: center;
  background: #030303;
  border: 1px solid var(--border-gold);
  border-radius: 10px;
  display: flex;
  justify-content: center;
  min-height: 320px;
  overflow: hidden;
  padding: 16px;
  text-align: center;
}

.preview-box img {
  max-height: 300px;
  max-width: 100%;
  object-fit: contain;
}

.price-grid article {
  display: grid;
  gap: 14px;
}

.price-grid strong {
  color: var(--champagne);
  display: block;
  font-size: 30px;
}

.featured-price {
  background:
    linear-gradient(rgba(199, 154, 69, 0.12), rgba(43, 45, 47, 0.94)),
    var(--panel);
}

.manual {
  align-items: start;
  display: grid;
  gap: 28px;
  grid-template-columns: 0.9fr 1.1fr;
  margin: 0 clamp(16px, 4vw, 56px) 76px;
}

footer {
  background: #000000;
  border-top: 1px solid var(--border-gold);
  color: var(--muted);
  padding: 28px clamp(16px, 4vw, 56px);
}

.footer-brand {
  align-items: center;
  display: flex;
  gap: 14px;
}

.footer-brand img {
  border: 1px solid var(--border-gold);
  border-radius: 999px;
  height: 40px;
  object-fit: cover;
  width: 40px;
}

.auth-body {
  background:
    linear-gradient(rgba(199, 154, 69, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 154, 69, 0.08) 1px, transparent 1px),
    var(--luxury-gradient);
  background-size: 42px 42px, 42px 42px, cover;
  min-height: 100vh;
}

.auth-shell {
  display: grid;
  gap: 32px;
  margin: 0 auto;
  max-width: 620px;
  padding: 48px 18px;
}

.auth-brand {
  justify-self: center;
}

.auth-switch {
  color: var(--secondary);
  text-align: center;
}

.auth-switch a {
  color: var(--champagne);
  font-weight: 800;
}

@media (max-width: 980px) {
  nav {
    display: none;
  }

  .hero,
  .converter-layout,
  .manual,
  .feature-grid,
  .price-grid,
  .form-grid,
  .scale-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-actions {
    flex-wrap: wrap;
  }

  .brand {
    font-size: 19px;
  }
}