/* ========================================
   OPUS NEXUM — Stylesheet
   ======================================== */

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

/* Variables */
:root {
  --color-bg: #0a0f1a;
  --color-bg-light: #111827;
  --color-bg-card: #1a2236;
  --color-surface: #1e293b;
  --color-border: #2a3654;
  --color-border-light: #374357;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --color-accent: #1a3a5c;
  --color-accent-light: #2563eb;
  --color-accent-hover: #3b82f6;
  --color-gold: #d4a853;
  --color-gold-dim: #b8923f;
  --color-success: #22c55e;
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --max-width-narrow: 720px;
  --nav-height: 72px;
  --section-padding: 100px;
}

/* Base */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

img {
  max-width: 100%;
  display: block;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent-light);
  color: #fff;
  border-color: var(--color-accent-light);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-light);
}

.btn-outline:hover {
  background: var(--color-surface);
  border-color: var(--color-text-dim);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--color-text);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 13px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 11px;
}

.btn-full {
  width: 100%;
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-text);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: var(--color-bg);
  padding: 32px 24px;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-menu-links a {
  font-size: 18px;
  color: var(--color-text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-links a:hover {
  color: var(--color-text);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(26, 58, 92, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(212, 168, 83, 0.05), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding: 80px 0;
}

.hero-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 500;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--color-text);
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  color: var(--color-text);
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
}

/* ========================================
   TRUST BAR
   ======================================== */
.trust-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 24px 0;
  background: var(--color-bg-light);
}

.trust-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-dim);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.trust-item svg {
  opacity: 0.5;
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: var(--section-padding) 0;
}

.section-dark {
  background: var(--color-bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 44px);
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
}

.section-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

/* ========================================
   STEPS
   ======================================== */
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}

.step-number {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 500;
  color: var(--color-border);
  margin-bottom: 16px;
}

.step-title {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 12px;
}

.step-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.step-connector {
  width: 60px;
  height: 1px;
  background: var(--color-border);
  margin-top: 28px;
  flex-shrink: 0;
}

/* ========================================
   SPLIT LAYOUT
   ======================================== */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-reverse {
  direction: rtl;
}

.split-reverse > * {
  direction: ltr;
}

.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--color-text-muted);
}

/* ========================================
   LISTING CARDS
   ======================================== */
.listing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 28px;
  transition: border-color 0.2s;
}

.listing-card:hover {
  border-color: var(--color-border-light);
}

.listing-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.listing-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  background: rgba(212, 168, 83, 0.1);
  padding: 4px 10px;
  border-radius: 3px;
}

.listing-id {
  font-size: 12px;
  color: var(--color-text-dim);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.listing-name {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
}

.listing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.listing-field {
  display: flex;
  flex-direction: column;
}

.listing-field-label {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
  margin-bottom: 4px;
}

.listing-field-value {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
}

.listing-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.listing-industry {
  font-size: 12px;
  color: var(--color-text-dim);
}

/* ========================================
   LISTINGS GRID
   ======================================== */
.listings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.listings-cta {
  text-align: center;
}

.listings-cta-text {
  font-size: 14px;
  color: var(--color-text-dim);
  margin-bottom: 16px;
}

/* ========================================
   VAULT GRAPHIC
   ======================================== */
.vault-graphic {
  position: relative;
  width: 280px;
  height: 280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vault-ring {
  position: absolute;
  border: 1px solid var(--color-border);
  border-radius: 50%;
}

.vault-ring-outer {
  width: 280px;
  height: 280px;
  border-color: var(--color-border);
}

.vault-ring-middle {
  width: 200px;
  height: 200px;
  border-color: var(--color-border-light);
  border-style: dashed;
}

.vault-ring-inner {
  width: 120px;
  height: 120px;
  border-color: var(--color-accent-light);
  background: rgba(37, 99, 235, 0.05);
}

.vault-center {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-accent-light);
}

.vault-center span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ========================================
   CTA CARDS
   ======================================== */
.section-cta {
  background: var(--color-bg-light);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.cta-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 40px;
  display: flex;
  flex-direction: column;
}

.cta-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 6px;
  color: var(--color-accent-light);
  margin-bottom: 24px;
}

.cta-card-title {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--color-text);
}

.cta-card-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.cta-features {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.cta-features li {
  font-size: 13px;
  color: var(--color-text-dim);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
}

.cta-features li:last-child {
  border-bottom: none;
}

.cta-features li::before {
  content: "\2014  ";
  color: var(--color-text-dim);
}

/* ========================================
   FORM
   ======================================== */
.submit-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.required {
  color: var(--color-gold);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-dim);
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%2364748B' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--color-bg);
  color: var(--color-text);
}

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

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-accent-light);
  flex-shrink: 0;
}

.checkbox-text {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-text-dim);
  margin-top: 16px;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--color-text);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-dim);
}

.footer-disclaimer {
  max-width: 500px;
  text-align: right;
  font-size: 12px !important;
  line-height: 1.5;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .nav-links,
  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .split-reverse {
    direction: ltr;
  }

  .steps {
    flex-direction: column;
    gap: 32px;
    align-items: stretch;
  }

  .step-connector {
    width: 1px;
    height: 24px;
    margin: 0 auto;
  }

  .listings-grid {
    grid-template-columns: 1fr;
  }

  .cta-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
  }

  .hero-content {
    padding: 48px 0;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .stat-divider {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .footer-disclaimer {
    text-align: left;
  }

  .trust-inner {
    gap: 24px;
  }

  .trust-item {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 32px;
  }

  .section-title {
    font-size: 28px;
  }

  .btn-lg {
    padding: 14px 28px;
  }
}

/* ========================================
   FORM SUBMISSION FEEDBACK
   ======================================== */
.form-success {
  text-align: center;
  padding: 48px 24px;
}

.form-success h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--color-text);
}

.form-success p {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 400px;
  margin: 0 auto;
}

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

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-light);
}