/* Steelstructure.AI brand refresh
   Positioning: global steel structure industry information platform.
   This file intentionally overrides css/style.css without replacing the legacy layout. */

:root {
  --bg-primary: #fbfdf9;
  --bg-secondary: #f1f5ef;
  --bg-dark: #0f172a;
  --text-primary: #102018;
  --text-secondary: #60706a;
  --text-light: #8aa098;
  --accent: #16a34a;
  --accent-hover: #166534;
  --accent-warm: #d97706;
  --accent-green: #16a34a;
  --accent-cyan: #06b6d4;
  --pine-deep: #0f3d2e;
  --pine-soft: #dcfce7;
  --border: #dfe8df;
  --card-bg: rgba(255, 255, 255, 0.86);
  --card-shadow: 0 14px 40px rgba(15, 23, 42, 0.07);
  --nav-bg: rgba(251, 253, 249, 0.88);
}

.dark {
  --bg-primary: #07110d;
  --bg-secondary: #0f1f18;
  --bg-dark: #020617;
  --text-primary: #edf7f1;
  --text-secondary: #a7b8ae;
  --text-light: #789083;
  --accent: #4ade80;
  --accent-hover: #86efac;
  --accent-warm: #fbbf24;
  --accent-green: #22c55e;
  --accent-cyan: #22d3ee;
  --pine-deep: #052e1b;
  --pine-soft: rgba(34, 197, 94, 0.12);
  --border: rgba(148, 163, 184, 0.2);
  --card-bg: rgba(15, 31, 24, 0.76);
  --card-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  --nav-bg: rgba(7, 17, 13, 0.88);
}

body {
  background:
    radial-gradient(circle at top left, rgba(34, 197, 94, 0.1), transparent 34rem),
    radial-gradient(circle at 85% 15%, rgba(6, 182, 212, 0.08), transparent 30rem),
    var(--bg-primary);
}

nav {
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.logo {
  color: var(--text-primary);
  letter-spacing: -0.055em;
}

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

.nav-links a {
  border-radius: 999px;
  padding: 8px 10px;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(22, 163, 74, 0.1);
  color: var(--accent);
}

.btn-icon,
.hamburger,
.btn-sm,
.filter-select,
.range-input,
.search-box input {
  border-radius: 12px;
}

.btn-primary {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: linear-gradient(135deg, #16a34a 0%, #06b6d4 100%);
  box-shadow: 0 14px 30px rgba(22, 163, 74, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #15803d 0%, #0891b2 100%);
}

.btn-secondary {
  border-radius: 999px;
  backdrop-filter: blur(14px);
}

.hero {
  min-height: 86vh;
  padding: 142px 0 92px;
  background:
    radial-gradient(circle at 74% 36%, rgba(34, 197, 94, 0.34), transparent 20rem),
    radial-gradient(circle at 86% 65%, rgba(6, 182, 212, 0.28), transparent 20rem),
    linear-gradient(90deg, rgba(2, 6, 23, 0.94) 0%, rgba(5, 46, 35, 0.78) 48%, rgba(5, 46, 35, 0.38) 100%),
    url("../assets/images/steel-hero.jpg") center / cover no-repeat;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 430px);
  gap: 48px;
  align-items: center;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(2.5rem, 5vw, 4.65rem);
  letter-spacing: -0.065em;
}

.hero p {
  max-width: 680px;
}

.eyebrow,
.hero-proof span {
  border-color: rgba(187, 247, 208, 0.28);
  background: rgba(6, 78, 59, 0.36);
  color: #dcfce7;
}

.hero-visual {
  position: relative;
}

.platform-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid rgba(187, 247, 208, 0.22);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.78), rgba(6, 78, 59, 0.54));
  box-shadow: 0 28px 80px rgba(2, 6, 23, 0.34);
  backdrop-filter: blur(18px);
}

.platform-card::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 260px;
  height: 260px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.38), transparent 62%);
}

.platform-card-header,
.agent-node,
.data-chip {
  position: relative;
}

.platform-card-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
  color: #ecfdf5;
}

.platform-card-header span {
  display: block;
  color: #a7f3d0;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.platform-card-header strong {
  display: block;
  margin-top: 4px;
  font-size: 1.08rem;
}

.agent-node-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.agent-node {
  min-height: 92px;
  padding: 14px;
  border: 1px solid rgba(187, 247, 208, 0.2);
  border-radius: 18px;
  background: rgba(2, 6, 23, 0.28);
}

.agent-node span {
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.18);
  color: #86efac;
}

.agent-node strong {
  display: block;
  color: #f8fafc;
  font-size: 0.92rem;
  line-height: 1.3;
}

.data-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.data-chip {
  padding: 7px 10px;
  border: 1px solid rgba(125, 211, 252, 0.24);
  border-radius: 999px;
  background: rgba(8, 47, 73, 0.35);
  color: #bae6fd;
  font-size: 0.76rem;
  font-weight: 700;
}

.stats-band {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
}

.dark .stats-band {
  background: rgba(7, 17, 13, 0.72);
}

.stat-item strong {
  color: var(--accent);
}

.section-title {
  letter-spacing: -0.035em;
}

.section-kicker,
.feature-kicker,
.brief-date {
  color: var(--accent);
}

.agent-section {
  position: relative;
  overflow: hidden;
}

.agent-section::before {
  content: "";
  position: absolute;
  right: -10rem;
  top: 4rem;
  width: 26rem;
  height: 26rem;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 68%);
  pointer-events: none;
}

.agent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.agent-card {
  position: relative;
  overflow: hidden;
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
}

.agent-card::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -44px;
  width: 132px;
  height: 132px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(22, 163, 74, 0.16), transparent 64%);
}

.agent-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(22, 163, 74, 0.16), rgba(6, 182, 212, 0.13));
  color: var(--accent);
  font-size: 1.25rem;
}

.agent-card h3 {
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: 1.08rem;
  line-height: 1.25;
}

.agent-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.opportunity-card,
.card,
.feature-panel,
.content-panel,
.contact-card,
.brief-panel,
.brief-archive,
.category-section,
.search-box {
  border-radius: 18px;
}

.card,
.opportunity-card,
.feature-panel,
.content-panel,
.contact-card,
.brief-panel,
.brief-archive {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
}

.card:hover,
.opportunity-card:hover,
.feature-panel:hover,
.agent-card:hover {
  transform: translateY(-4px);
  border-color: rgba(22, 163, 74, 0.38);
  box-shadow: 0 20px 55px rgba(15, 23, 42, 0.12);
}

.card-company,
.opportunity-card span,
.mini-card strong {
  color: var(--accent);
}

.status-signed {
  background: #dcfce7;
  color: #166534;
}

.status-building {
  background: #e0f2fe;
  color: #075985;
}

.status-design {
  background: #fef3c7;
  color: #92400e;
}

.feature-panel-wide {
  background:
    linear-gradient(135deg, rgba(22, 163, 74, 0.1), rgba(6, 182, 212, 0.08)),
    var(--card-bg);
}

.page-content {
  background:
    radial-gradient(circle at 10% 10%, rgba(22, 163, 74, 0.06), transparent 26rem),
    radial-gradient(circle at 90% 20%, rgba(6, 182, 212, 0.06), transparent 24rem);
}

.page-title {
  letter-spacing: -0.045em;
}

@media (max-width: 960px) {
  .hero-grid,
  .agent-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-links a {
    border-radius: 0;
    padding: 12px 0;
  }

  .hero {
    background:
      linear-gradient(180deg, rgba(2, 6, 23, 0.95) 0%, rgba(5, 46, 35, 0.76) 70%, rgba(5, 46, 35, 0.32) 100%),
      url("../assets/images/steel-hero.jpg") center / cover no-repeat;
  }

  .agent-grid {
    gap: 14px;
  }
}