/* ==========================================================================
   AMD-SECURE.COM: Silicon Security Architecture & Remote Attestation Portal
   Theme: Deep Obsidian & Carbon Dark (#0c0d10, #141519) + AMD Red (#ed1c24)
   Namespace: .sec-*
   ========================================================================== */

:root {
  --sec-black: #08090b;
  --sec-bg-main: #0c0d10;
  --sec-bg-surface: #141519;
  --sec-bg-elevated: #1b1c22;
  --sec-bg-card: #181920;
  --sec-border: #282a33;
  --sec-border-subtle: #1e2027;
  --sec-border-focus: #ed1c24;
  --sec-red: #ed1c24;
  --sec-red-hover: #c41219;
  --sec-red-glow: rgba(237, 28, 36, 0.2);
  --sec-cyan: #00c2de;
  --sec-text-pure: #ffffff;
  --sec-text-high: #f0f2f5;
  --sec-text-mid: #9ba5b7;
  --sec-text-low: #6b7280;
  --sec-code-bg: #090a0d;
  --sec-code-border: #232530;
  --sec-radius-sm: 4px;
  --sec-radius-md: 6px;
  --sec-radius-lg: 10px;
  --sec-font-sans: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --sec-font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--sec-bg-main);
  color: var(--sec-text-high);
}

body {
  font-family: var(--sec-font-sans);
  line-height: 1.6;
  background-color: var(--sec-bg-main);
  color: var(--sec-text-high);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--sec-text-pure);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--sec-red);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.sec-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(12, 13, 16, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sec-border-subtle);
}

.sec-topbar {
  background-color: var(--sec-black);
  border-bottom: 1px solid var(--sec-border-subtle);
  font-size: 0.75rem;
  color: var(--sec-text-mid);
  padding: 6px 0;
}

.sec-topbar-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sec-topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sec-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #10b981;
  font-weight: 600;
}

.sec-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
}

.sec-topbar-right {
  display: flex;
  gap: 20px;
}

.sec-topbar-right a {
  color: var(--sec-text-mid);
}

.sec-topbar-right a:hover {
  color: var(--sec-text-pure);
}

.sec-nav-main {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sec-brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sec-brand-logo {
  height: 38px;
  width: auto;
  display: block;
}

.sec-nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.sec-nav-menu a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--sec-text-mid);
  padding: 8px 0;
  position: relative;
}

.sec-nav-menu a:hover,
.sec-nav-menu a.active {
  color: var(--sec-text-pure);
}

.sec-nav-menu a.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--sec-red);
}

.sec-header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sec-btn-search {
  background-color: var(--sec-bg-surface);
  border: 1px solid var(--sec-border);
  border-radius: var(--sec-radius-sm);
  color: var(--sec-text-mid);
  padding: 7px 14px;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.sec-btn-cta {
  background-color: var(--sec-red);
  color: var(--sec-text-pure);
  font-weight: 700;
  font-size: 0.84rem;
  padding: 8px 18px;
  border-radius: var(--sec-radius-sm);
  transition: background-color 0.15s ease;
}

.sec-btn-cta:hover {
  background-color: var(--sec-red-hover);
  color: var(--sec-text-pure);
}

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.sec-breadcrumbs {
  background-color: var(--sec-black);
  border-bottom: 1px solid var(--sec-border-subtle);
  padding: 10px 0;
  font-size: 0.8rem;
  color: var(--sec-text-low);
}

.sec-breadcrumbs-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.sec-breadcrumbs a {
  color: var(--sec-text-mid);
}

.sec-breadcrumbs a:hover {
  color: var(--sec-text-pure);
}

.sec-breadcrumbs span {
  color: var(--sec-text-pure);
  font-weight: 600;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.sec-hero {
  padding: 64px 0 54px;
  background: radial-gradient(circle at 80% 20%, rgba(237, 28, 36, 0.08) 0%, rgba(12, 13, 16, 0) 70%),
              radial-gradient(circle at 20% 80%, rgba(0, 194, 222, 0.04) 0%, rgba(12, 13, 16, 0) 60%),
              var(--sec-bg-main);
  border-bottom: 1px solid var(--sec-border-subtle);
}

.sec-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

.sec-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.sec-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(237, 28, 36, 0.1);
  border: 1px solid rgba(237, 28, 36, 0.25);
  color: var(--sec-red);
  padding: 4px 12px;
  border-radius: var(--sec-radius-sm);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.sec-hero-title {
  font-size: 2.7rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--sec-text-pure);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.sec-hero-title span {
  color: var(--sec-red);
}

.sec-hero-lead {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--sec-text-mid);
  margin-bottom: 30px;
}

.sec-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.sec-pill {
  background-color: var(--sec-bg-surface);
  border: 1px solid var(--sec-border);
  padding: 6px 14px;
  border-radius: var(--sec-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--sec-text-high);
}

.sec-hero-actions {
  display: flex;
  gap: 16px;
}

.sec-hero-visual {
  position: relative;
  border-radius: var(--sec-radius-md);
  overflow: hidden;
  border: 1px solid var(--sec-border);
  background-color: var(--sec-bg-surface);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.sec-hero-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
}

.sec-hero-visual-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background-color: rgba(12, 13, 16, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--sec-border);
  padding: 12px 18px;
  border-radius: var(--sec-radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sec-hero-visual-badge span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--sec-text-pure);
}

.sec-hero-visual-badge code {
  font-family: var(--sec-font-mono);
  font-size: 0.75rem;
  color: var(--sec-red);
}

/* ==========================================================================
   STICKY ANCHOR SUB-NAV
   ========================================================================== */
.sec-subnav {
  position: sticky;
  top: 68px;
  z-index: 900;
  background-color: var(--sec-bg-surface);
  border-bottom: 1px solid var(--sec-border);
}

.sec-subnav-list {
  display: flex;
  gap: 28px;
  list-style: none;
  overflow-x: auto;
}

.sec-subnav-list a {
  display: block;
  padding: 14px 0;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--sec-text-mid);
  white-space: nowrap;
  position: relative;
}

.sec-subnav-list a:hover {
  color: var(--sec-text-pure);
}

/* ==========================================================================
   3-COLUMN SECTION / CONTENT ARCHITECTURE
   ========================================================================== */
.sec-content-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--sec-border-subtle);
}

.sec-content-section-alt {
  background-color: var(--sec-bg-surface);
}

.sec-section-header {
  margin-bottom: 40px;
  max-width: 780px;
}

.sec-section-eyebrow {
  color: var(--sec-red);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.sec-section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--sec-text-pure);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.sec-section-lead {
  font-size: 1rem;
  color: var(--sec-text-mid);
  line-height: 1.6;
}

/* Feature Cards Grid */
.sec-card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.sec-card {
  background-color: var(--sec-bg-card);
  border: 1px solid var(--sec-border);
  border-radius: var(--sec-radius-md);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.sec-card:hover {
  transform: translateY(-4px);
  border-color: var(--sec-red);
}

.sec-card-img-wrap {
  height: 200px;
  position: relative;
  overflow: hidden;
  background-color: #050608;
}

.sec-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.sec-card:hover .sec-card-img {
  transform: scale(1.04);
}

.sec-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background-color: rgba(12, 13, 16, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--sec-text-pure);
}

.sec-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sec-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--sec-text-pure);
  margin-bottom: 10px;
}

.sec-card-desc {
  font-size: 0.9rem;
  color: var(--sec-text-mid);
  margin-bottom: 20px;
  line-height: 1.55;
  flex: 1;
}

.sec-card-meta {
  border-top: 1px solid var(--sec-border-subtle);
  padding-top: 14px;
  font-size: 0.8rem;
  color: var(--sec-text-low);
  display: flex;
  justify-content: space-between;
}

.sec-card-meta code {
  color: var(--sec-red);
  font-family: var(--sec-font-mono);
}

/* ==========================================================================
   TECHNICAL SPECIFICATION TABLE
   ========================================================================== */
.sec-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--sec-border);
  border-radius: var(--sec-radius-md);
  background-color: var(--sec-bg-card);
}

.sec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.sec-table th {
  background-color: var(--sec-bg-surface);
  color: var(--sec-text-pure);
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--sec-border);
}

.sec-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--sec-border-subtle);
  color: var(--sec-text-mid);
}

.sec-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--sec-text-high);
}

.sec-code-pill {
  font-family: var(--sec-font-mono);
  font-size: 0.78rem;
  background-color: var(--sec-code-bg);
  border: 1px solid var(--sec-code-border);
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--sec-red);
}

/* ==========================================================================
   CODE & ATTESTATION STRUCT
   ========================================================================== */
.sec-code-container {
  background-color: var(--sec-code-bg);
  border: 1px solid var(--sec-code-border);
  border-radius: var(--sec-radius-md);
  overflow: hidden;
}

.sec-code-header {
  background-color: var(--sec-bg-surface);
  border-bottom: 1px solid var(--sec-code-border);
  padding: 10px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--sec-text-mid);
}

.sec-code-header code {
  color: var(--sec-text-pure);
  font-family: var(--sec-font-mono);
}

.sec-code-body {
  padding: 20px 24px;
  overflow-x: auto;
}

.sec-code-body pre {
  font-family: var(--sec-font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e2e8f0;
}

.sec-token-kw { color: #f43f5e; }
.sec-token-type { color: #38bdf8; }
.sec-token-comment { color: #64748b; font-style: italic; }

/* ==========================================================================
   CUSTOMER CASE STUDIES (Zonar, Bullish, MonetaGo)
   ========================================================================== */
.sec-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.sec-case-card {
  background-color: var(--sec-bg-surface);
  border: 1px solid var(--sec-border);
  border-radius: var(--sec-radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.sec-case-logo {
  height: 32px;
  max-width: 140px;
  object-fit: contain;
  margin-bottom: 20px;
}

.sec-case-quote {
  font-size: 0.92rem;
  color: var(--sec-text-high);
  line-height: 1.55;
  margin-bottom: 20px;
  flex: 1;
}

.sec-case-author {
  font-size: 0.8rem;
  color: var(--sec-text-low);
}

.sec-case-author strong {
  color: var(--sec-text-pure);
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.sec-footer {
  background-color: var(--sec-black);
  border-top: 1px solid var(--sec-border);
  padding: 64px 0 36px;
  font-size: 0.84rem;
  color: var(--sec-text-mid);
}

.sec-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.sec-footer-brand h4 {
  color: var(--sec-text-pure);
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.sec-footer-brand p {
  color: var(--sec-text-mid);
  line-height: 1.6;
  margin-bottom: 16px;
}

.sec-footer-col h5 {
  color: var(--sec-text-pure);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.sec-footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

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

.sec-footer-bottom {
  border-top: 1px solid var(--sec-border-subtle);
  padding-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--sec-text-low);
}

.sec-footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
}

.sec-footer-legal-links a {
  color: var(--sec-text-mid);
}

.sec-footer-legal-links a:hover {
  color: var(--sec-text-pure);
}

.sec-footer-disclaimer {
  line-height: 1.6;
  color: var(--sec-text-low);
}

@media (max-width: 1024px) {
  .sec-hero-grid { grid-template-columns: 1fr; }
  .sec-card-grid-3, .sec-cases-grid { grid-template-columns: 1fr; }
  .sec-footer-grid { grid-template-columns: 1fr 1fr; }
}