/*
  SYNTRA REFINING CORP. — BRAND THEME 2026
  ==========================================
  Single source of truth for all brand elements.
  Based on: SYNTRA Brand Guidelines 2026 (Jan 2026)
*/

/* ============================
   TYPOGRAPHY
   ============================ */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@700&family=Inter:wght@400;600&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  /* Brand Colors - Primary */
  --syntra-midnight-navy: #0B1120;
  --syntra-signal-yellow: #FFD700;
  --syntra-deep-slate: #0F172A;
  --syntra-slate-50: #F9FAFC;
  --syntra-white: #FFFFFF;

  /* Brand Colors - Secondary (use sparingly) */
  --syntra-cyan: #0891B2;
  --syntra-slate-300: #CBD5E1;
  --syntra-slate-400: #94A3B8;
  --syntra-slate-500: #64748B;
  --syntra-slate-800: #1E293B;

  /* Typography */
  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Font Weights */
  --weight-heading: 700;
  --weight-body-light: 400;
  --weight-body-medium: 600;
  --weight-mono-light: 400;
  --weight-mono-bold: 700;

  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border Radius (Sharp Premium Feel) */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ============================
   BASE TYPOGRAPHY
   ============================ */

body {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  color: var(--syntra-deep-slate);
  background-color: var(--syntra-slate-50);
  line-height: 1.7;
}

/* Headings: Oswald Bold Only */
h1, h2, h3, h4, h5, h6,
.heading {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-align: left;
}

h1 { font-size: 3rem; line-height: 1.1; }
h2 { font-size: 2.25rem; line-height: 1.2; }
h3 { font-size: 1.875rem; line-height: 1.25; }
h4 { font-size: 1.5rem; line-height: 1.3; }
h5 { font-size: 1.25rem; line-height: 1.35; }
h6 { font-size: 1.125rem; line-height: 1.4; }

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.875rem; }
  h3 { font-size: 1.5rem; }
  h4 { font-size: 1.25rem; }
  h5 { font-size: 1.125rem; }
  h6 { font-size: 1rem; }
}

/* Body Text: Inter Light (Medium for Emphasis) */
p, li, a, span:not([class*="font-mono"]):not([class*="font-head"]) {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
}

strong, b, .emphasis {
  font-weight: var(--weight-body-medium);
}

/* Data/Specs/Nav: JetBrains Mono Light */
.mono, .spec, .data-label, nav,
[class*="nav-"], [class*="metric"], [class*="stat"],
[class*="font-mono"] {
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
}

.mono strong, .spec strong, .data-label strong {
  font-weight: var(--weight-mono-bold);
}

/* ============================
   ALIGNMENT (ALWAYS LEFT)
   ============================ */

.text-left-forced,
.hero-content,
.section-content,
.cta-content,
main p,
main h1, main h2, main h3, main h4, main h5, main h6 {
  text-align: left !important;
}

/* Remove any center alignment */
.text-center {
  text-align: left !important;
}

/* Force all table text to be left-aligned */
table th,
table td,
table thead th,
table tbody td,
table tfoot td {
  text-align: left !important;
}

/* ============================
   SHARP GEOMETRY
   ============================ */

/* Buttons - STRICT: Oswald Bold Only */
.btn,
button,
[class*="button"],
[class*="cta"],
input[type="submit"],
input[type="button"] {
  border-radius: var(--radius-sm) !important;
  border: none;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading) !important;
  font-weight: var(--weight-heading) !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-normal);
  text-align: center !important;
  justify-content: center !important;
}

/* Button-styled links */
a.inline-flex,
a[class*="inline-flex"] {
  text-align: center !important;
  justify-content: center !important;
}

.btn-primary {
  background-color: var(--syntra-signal-yellow);
  color: var(--syntra-midnight-navy);
}

.btn-primary:hover {
  background-color: var(--syntra-midnight-navy);
  color: var(--syntra-signal-yellow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--syntra-signal-yellow);
  border: 2px solid var(--syntra-signal-yellow);
}

.btn-secondary:hover {
  background-color: var(--syntra-signal-yellow);
  color: var(--syntra-midnight-navy);
}

/* Cards */
.card,
[class*="card"] {
  border-radius: var(--radius-md);
  background-color: var(--syntra-white);
  border: 1px solid var(--syntra-slate-300);
}

/* Input Fields */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
textarea,
select {
  border-radius: var(--radius-sm);
  border: 1px solid var(--syntra-slate-300);
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--syntra-signal-yellow);
}

/* ============================
   LOGO USAGE
   ============================ */

.syntra-logo-container {
  display: inline-block;
  position: relative;
}

.syntra-logo-diamond {
  position: relative;
}

.syntra-logo-square {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Animation: Diamond rotates, Square stays static */
@keyframes diamond-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.syntra-logo-diamond.animated {
  animation: diamond-rotate 20s linear infinite;
}

.syntra-logo-square.animated {
  animation: none;
}

/* ============================
   BRAND COLORS
   ============================ */

.bg-midnight-navy { background-color: var(--syntra-midnight-navy); }
.bg-signal-yellow { background-color: var(--syntra-signal-yellow); }
.bg-deep-slate { background-color: var(--syntra-deep-slate); }
.bg-slate-50 { background-color: var(--syntra-slate-50); }
.bg-white { background-color: var(--syntra-white); }

.text-midnight-navy { color: var(--syntra-midnight-navy); }
.text-signal-yellow { color: var(--syntra-signal-yellow); }
.text-deep-slate { color: var(--syntra-deep-slate); }
.text-slate-50 { color: var(--syntra-slate-50); }
.text-white { color: var(--syntra-white); }

.border-midnight-navy { border-color: var(--syntra-midnight-navy); }
.border-signal-yellow { border-color: var(--syntra-signal-yellow); }
.border-slate-300 { border-color: var(--syntra-slate-300); }

/* ============================
   TECHNICAL GRID OVERLAY
   Canonical Syntra engineered-grid system.
   All grids: strict orthogonal (H+V only), no diagonals.
   ============================ */

/* Light-bg grid: pure black lines on white/light backgrounds — matches homepage hero SVG */
.syntra-grid-overlay {
  position: relative;
}

.syntra-grid-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.syntra-grid-overlay > * {
  position: relative;
  z-index: 1;
}

/* Dark-bg grid: white lines on navy/dark backgrounds */
.syntra-grid-dark {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Gold-bg grid: navy lines on gold/amber backgrounds */
.syntra-grid-gold {
  background-image:
    linear-gradient(rgba(11,17,32,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,17,32,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Gold-overlay grid: gold lines on dark backgrounds */
.syntra-grid-gold-overlay {
  background-image:
    linear-gradient(rgba(255,215,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,215,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Hero grid: single-scale 40px, normalized to match homepage hero SVG */
.syntra-grid-hero {
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Dark hero grid: normalized to canonical single-scale, matches .bg-chicken-wire-dark */
.syntra-grid-hero-dark {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Legacy class aliases — normalized to canonical orthogonal grid */
/* Matches homepage hero SVG: black stroke at 5% opacity, 40×40px single-scale */
.bg-chicken-wire {
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-chicken-wire-dark {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-chicken-wire-gold {
  background-image:
    linear-gradient(rgba(255,215,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,215,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ============================
   DIVIDER SYSTEM
   Canonical Syntra divider classes.
   All dividers: perfectly straight, hard-edged, rgba colors only.
   ============================ */

/* Standard horizontal rule — light backgrounds */
.syntra-divider {
  height: 1px;
  background: rgba(11,17,32,0.12);
  border: none;
}

/* Standard horizontal rule — dark backgrounds */
.syntra-divider-dark {
  height: 1px;
  background: rgba(255,255,255,0.08);
  border: none;
}

/* Gold accent horizontal bar — 3px, used under section headings */
.syntra-divider-gold {
  height: 3px;
  background: rgba(255,215,0,0.55);
}

/* Section separator — faint full-width rule for separating content blocks */
.syntra-section-divider {
  height: 1px;
  background: rgba(203,213,225,0.5);
}

/* Vertical rule — used in flex layouts */
.syntra-divider-v {
  width: 1px;
  background: rgba(11,17,32,0.12);
}

.syntra-divider-v-dark {
  width: 1px;
  background: rgba(255,255,255,0.08);
}

/* ============================
   UTILITIES
   ============================ */

.container-brand {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

@media (min-width: 768px) {
  .container-brand {
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }
}

.section-spacing {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

@media (max-width: 768px) {
  .section-spacing {
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
  }
}

/* ============================
   VOICE & TONE HELPERS
   ============================ */

.brand-wordmark::after {
  content: 'SYNTRA';
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
}

.brand-syncore::after {
  content: 'SYNCORE™';
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
}

.brand-synhub::after {
  content: 'SYNHUB™';
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
}

/* ============================
   ANIMATION & MOTION
   ============================ */

@keyframes fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fade-in 0.6s ease forwards;
}

.transition-brand {
  transition: all var(--transition-normal);
}

/* ============================
   ACCESSIBILITY
   ============================ */

:focus-visible {
  outline: 2px solid var(--syntra-signal-yellow);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================
   BRAND COMPLIANCE HELPERS
   ============================ */

/* STRICT ENFORCEMENT: No centered text anywhere */
[class*="text-center"],
[class*="items-center"][class*="flex-col"],
.text-center,
main [class*="center"],
main [style*="text-align: center"],
[style*="text-align: center"] {
  text-align: left !important;
}

/* Allow flex centering for layout, but force text left */
.flex.flex-col.items-center *,
.flex.items-center *,
.grid.text-center * {
  text-align: left !important;
}

/* STRICT ENFORCEMENT: Sharp corners only */
*,
*::before,
*::after {
  border-radius: 0 !important;
}

/* Allowed border radius - Small elements only */
.btn,
button:not([class*="rounded-full"]),
[class*="button"]:not([class*="rounded-full"]),
[class*="cta"],
input:not([type="radio"]):not([type="checkbox"]),
textarea,
select,
.card:not([class*="rounded-xl"]):not([class*="rounded-2xl"]):not([class*="rounded-full"]) {
  border-radius: var(--radius-sm) !important;
}

/* Structural elements: NO rounding */
[class*="card"],
[class*="capability"],
[class*="metric"],
section,
article,
.panel,
.box {
  border-radius: 0 !important;
}

/* Images and decorative elements: NO rounding */
img,
[class*="avatar"],
[class*="badge"],
.indicator,
[class*="status"] {
  border-radius: 0 !important;
}

/* Override all Tailwind rounded classes */
[class*="rounded-full"],
[class*="rounded-xl"],
[class*="rounded-2xl"],
[class*="rounded-3xl"],
[class*="rounded-lg"],
[class*="rounded-md"] {
  border-radius: var(--radius-sm) !important;
}

/* Ping animations and decorative dots - allow full rounding */
.animate-ping,
[class*="ping"],
.dot,
[style*="width: 2px"],
[style*="width: 4px"],
[style*="width: 8px"] {
  border-radius: 50% !important;
}

/* ============================
   GLOBAL CONSISTENCY ENFORCEMENT
   ============================ */

/* Modal close button — sharp geometry, consistent 40x40 touch-friendly */
.modal-close-btn {
  border-radius: 2px !important;
  width: 44px !important;
  height: 44px !important;
}

/* Hamburger and close nav buttons — minimum 44x44 touch target */
button[onclick="toggleMobileMenu()"],
button[aria-label="Open navigation menu"],
button[aria-label="Close menu"] {
  padding: 0.75rem !important;
  min-width: 44px;
  min-height: 44px;
}

/* Inline border-radius overrides — catch hardcoded 4px/8px values */
[style*="border-radius: 4px"],
[style*="border-radius:4px"],
[style*="border-radius: 8px"],
[style*="border-radius:8px"],
[style*="border-radius: 6px"],
[style*="border-radius:6px"] {
  border-radius: 2px !important;
}

/* Badge / tag elements — sharp */
[class*="badge"],
[class*="tag"],
[class*="chip"],
[class*="mineral-badge"],
[class*="status-badge"] {
  border-radius: 0 !important;
}

/* Form inputs — unified sizing: min 44px height, 2px radius */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="search"],
textarea,
select {
  border-radius: 2px !important;
  min-height: 44px;
  padding: 0.75rem 1rem !important;
}

/* Card containers — 0 radius for structural cards */
.card-elevated,
[class*="rfq"],
[class*="job-card"],
[class*="feature-card"],
[class*="material-card"],
[class*="tech-card"],
[class*="feedstock-card"],
[class*="app-card"],
[class*="output-card"],
[class*="stat-box"],
[class*="process-step"],
[class*="capability-card"] {
  border-radius: 0 !important;
}

/* Map overlays and popup wrappers */
.leaflet-popup-content-wrapper,
.legend,
.title-overlay,
[class*="overlay"],
[class*="legend"] {
  border-radius: 2px !important;
}

/* Data label minimum font size — no 9px text */
.lbl-dark,
.lbl-light,
[class*="lbl-"] {
  font-size: 10px !important;
}

/* Data grids on production pages — ensure horizontal scroll on mobile */
.stat-grid-3,
.output-grid {
  overflow-x: auto;
}

/* CTA buttons — consistent sizing, no padding drift */
.cta-button,
a.cta-button,
button.cta-button {
  padding: 0.75rem 1.5rem !important;
  border-radius: 2px !important;
}

/* ============================
   SHARED COMPONENT CLASSES
   Single source of truth for all reusable UI tokens.
   Use these classes instead of one-off inline styles.
   ============================ */

/* --- HERO EYEBROW --- */
/* Cyan badge above hero headline. JetBrains Mono, sharp edges. */
.hero-eyebrow,
.section-eyebrow {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--syntra-cyan);
  background-color: rgba(8, 145, 178, 0.15);
  border: 1px solid rgba(8, 145, 178, 0.25);
  border-radius: 0;
}

/* --- HERO TITLE --- */
/* Large Oswald Bold hero H1. Use with clamp size inline for responsive hero. */
.hero-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(2.8rem, 10vw, 6.5rem);
  line-height: 0.88;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--syntra-midnight-navy);
  margin-bottom: 2rem;
}

/* Hero title on dark backgrounds */
.hero-title-light {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(2.8rem, 10vw, 6.5rem);
  line-height: 0.88;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--syntra-white);
  margin-bottom: 2rem;
}

/* --- HERO SUBTITLE --- */
/* Constrained-width body copy beneath hero H1. Inter Light. */
.hero-subtitle {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--syntra-slate-500);
  max-width: 480px;
}

@media (min-width: 640px) {
  .hero-subtitle { font-size: 1.125rem; }
}

/* --- SECTION TITLE --- */
/* Oswald Bold section H2. Use on all major section headings. */
.section-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(1.875rem, 5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--syntra-midnight-navy);
  margin-bottom: 1.5rem;
}

/* Section title on dark backgrounds */
.section-title-light {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(1.875rem, 5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--syntra-white);
  margin-bottom: 1.5rem;
}

/* --- SECTION SUBTITLE --- */
/* Short supporting line under section title. Inter Light. */
.section-subtitle {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--syntra-slate-500);
  max-width: 640px;
  margin-bottom: 1rem;
}

/* --- SECTION BODY --- */
/* Standard body copy within sections. Inter Light. */
.section-body {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--syntra-slate-500);
}

@media (min-width: 640px) {
  .section-body { font-size: 1.125rem; }
}

/* --- CARD TITLE --- */
/* Oswald Bold H3-level title inside cards. */
.card-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 1.125rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--syntra-midnight-navy);
  margin-bottom: 0.5rem;
}

.card-title-light {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 1.125rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--syntra-white);
  margin-bottom: 0.5rem;
}

/* --- CARD BODY --- */
/* Inter Light copy inside cards. */
.card-body {
  font-family: var(--font-body);
  font-weight: var(--weight-body-light);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--syntra-slate-500);
}

/* --- TECHNICAL LABEL --- */
/* JetBrains Mono Light for data labels, specs, badges, nav. */
.technical-label {
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--syntra-slate-400);
}

/* --- STAT VALUE --- */
/* Large Oswald Bold metric number. */
.stat-value {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--syntra-midnight-navy);
}

.stat-value-light {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--syntra-white);
}

/* --- STAT LABEL --- */
/* JetBrains Mono Light label beneath stat number. */
.stat-label {
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--syntra-slate-400);
  margin-top: 0.375rem;
}

/* --- NAV LINK --- */
.nav-link {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--syntra-deep-slate);
  transition: color 150ms ease;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--syntra-signal-yellow);
}

.nav-link.nav-active {
  color: var(--syntra-signal-yellow);
}

/* --- BUTTON PRIMARY --- */
.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background-color: var(--syntra-signal-yellow);
  color: var(--syntra-midnight-navy);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease, transform 150ms ease;
  white-space: nowrap;
}

.button-primary:hover {
  background-color: var(--syntra-midnight-navy);
  color: var(--syntra-signal-yellow);
  transform: translateY(-1px);
}

/* --- BUTTON SECONDARY --- */
/* On dark backgrounds: outline style. On light: filled navy. */
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background-color: transparent;
  color: var(--syntra-signal-yellow);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid rgba(255, 215, 0, 0.4);
  border-radius: 0;
  cursor: pointer;
  transition: border-color 200ms ease, color 200ms ease, background-color 200ms ease;
  white-space: nowrap;
}

.button-secondary:hover {
  border-color: var(--syntra-signal-yellow);
  color: var(--syntra-signal-yellow);
  background-color: rgba(255, 215, 0, 0.06);
}

/* --- SECTION BLOCK HEADER --- */
/* Wrapper for eyebrow + title + optional subtitle in section openers. */
.section-header {
  margin-bottom: 3.5rem;
}

.section-header .section-eyebrow {
  margin-bottom: 1.25rem;
}

.section-header .section-title {
  margin-bottom: 1rem;
}

/* --- YELLOW SPINE BAR (left accent) --- */
.yellow-spine {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(to bottom, #FFD700 0%, rgba(255, 215, 0, 0.4) 100%);
  pointer-events: none;
}

/* --- SECTION LABEL (legacy inline eyebrow) --- */
/* Used in process.html; normalize to match .hero-eyebrow */
.section-label {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--syntra-cyan);
  background-color: rgba(8, 145, 178, 0.15);
  border: 1px solid rgba(8, 145, 178, 0.25);
  border-radius: 0;
}

/* ============================
   END BRAND THEME
   ============================ */