/* ============================================
   HJXI Trade Limited - IR Website
   Design System: "The Global Monolith"
   Deep Navy + Orange Flare
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200');

/* ---- CSS Custom Properties (Design Tokens) ---- */
:root {
  /* Surface & Background */
  --surface-lowest: #030E20;
  --surface: #071325;
  --surface-container-low: #101C2E;
  --surface-container: #142032;
  --surface-container-high: #1F2A3D;
  --surface-container-highest: #2A3548;
  --surface-bright: #2E394D;

  /* Primary */
  --primary: #BBC7DF;
  --primary-container: #0A1628;
  --primary-fixed: #D7E3FC;
  --on-primary: #253144;
  --on-surface: #D7E3FC;
  --on-surface-variant: #C5C6CD;

  /* Secondary (Orange Flare) */
  --secondary: #FFB59A;
  --secondary-container: #CD4800;
  --secondary-fixed: #FFDBCE;
  --secondary-fixed-dim: #FFB59A;
  --on-secondary: #5B1B00;
  --on-secondary-container: #FFFBFF;

  /* Tertiary */
  --on-tertiary-container: #DC5310;

  /* Outline */
  --outline: #8F9097;
  --outline-variant: #45474C;

  /* Inverse */
  --inverse-surface: #D7E3FC;
  --inverse-on-surface: #253144;

  /* Functional */
  --error: #FFB4AB;
  --error-container: #93000A;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing Scale (x2) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--on-tertiary-container);
}

img {
  max-width: 100%;
  height: auto;
}

/* ---- Typography ---- */
.display-lg {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.display-md {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.headline-lg {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
}

.headline-md {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.25;
}

.headline-sm {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.3;
}

.title-lg {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 500;
  line-height: 1.3;
}

.title-md {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.35;
}

.body-lg {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
}

.body-md {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.6;
}

.label-lg {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.label-sm {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ---- Layout ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section {
  padding: var(--space-24) 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 19, 37, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: background 0.3s ease;
}

.nav.scrolled {
  background: rgba(7, 19, 37, 0.92);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-8);
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.01em;
}

.nav-logo-sub {
  font-family: var(--font-body);
  font-size: 0.625rem;
  color: var(--on-surface-variant);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: -2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--on-surface);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--secondary-container);
  border-radius: var(--radius-full);
}

.nav-cta {
  background: var(--secondary-container);
  color: var(--on-secondary-container) !important;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600 !important;
  font-size: 0.8125rem !important;
  transition: background 0.3s ease, box-shadow 0.3s ease !important;
}

.nav-cta:hover {
  background: var(--on-tertiary-container) !important;
  box-shadow: 0 0 16px rgba(220, 83, 16, 0.3);
  color: var(--on-secondary-container) !important;
}

/* Language Toggle */
.lang-toggle {
  background: transparent;
  color: var(--on-surface-variant);
  border: 1px solid rgba(69, 71, 76, 0.3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}

.lang-toggle:hover {
  border-color: var(--on-surface);
  color: var(--on-surface);
}

/* Mobile Nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--on-surface);
  cursor: pointer;
  font-size: 1.5rem;
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-container) 0%, var(--surface-lowest) 100%);
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(187, 199, 223, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(187, 199, 223, 0.3) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--surface-container-high);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
}

.hero-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--secondary-container);
  animation: pulse 2s infinite;
}

.hero-title {
  max-width: 800px;
  margin-bottom: var(--space-8);
}

.hero-title .highlight {
  color: var(--secondary);
}

.hero-desc {
  max-width: 560px;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-10);
}

.hero-stats {
  display: flex;
  gap: var(--space-16);
  padding-top: var(--space-10);
}

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--secondary);
}

.hero-stat-label {
  color: var(--on-surface-variant);
  margin-top: var(--space-1);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ---- Buttons ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
  background: var(--on-tertiary-container);
  box-shadow: 0 0 16px rgba(220, 83, 16, 0.3);
  color: var(--on-secondary-container);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--on-surface);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid rgba(69, 71, 76, 0.2);
  cursor: pointer;
  transition: border-color 0.3s ease;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 1);
  color: var(--on-surface);
}

/* ---- Cards ---- */
.card {
  background: var(--surface-container-high);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: background 0.3s ease;
}

.card:hover {
  background: var(--surface-container-highest);
}

.card-surface {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.card-inner {
  background: var(--surface-container-low);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

/* ---- Tonal Carving Sections ---- */
.section-carved {
  background: var(--surface-container-low);
}

.section-deep {
  background: var(--surface-lowest);
}

.section-elevated {
  background: var(--surface-container);
}

/* ---- Data Tables (IR) ---- */
.ir-table {
  width: 100%;
  border-collapse: collapse;
}

.ir-table thead th {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  text-align: left;
  padding: var(--space-4) var(--space-6);
}

.ir-table tbody tr:nth-child(odd) {
  background: var(--surface);
}

.ir-table tbody tr:nth-child(even) {
  background: var(--surface-container-low);
}

.ir-table tbody td {
  padding: var(--space-4) var(--space-6);
  font-size: 0.875rem;
}

/* ---- Icon Style ---- */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
  color: inherit;
}

.icon-box {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-container);
  border-radius: var(--radius-md);
  color: var(--secondary);
  margin-bottom: var(--space-6);
  transition: color 0.3s ease;
}

.card:hover .icon-box {
  color: var(--on-tertiary-container);
}

/* ---- Footer ---- */
.footer {
  background: var(--surface-lowest);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer-brand p {
  color: var(--on-surface-variant);
  margin-top: var(--space-4);
  max-width: 280px;
}

.footer-heading {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-6);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--primary);
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--secondary);
}

.footer-bottom {
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--on-surface-variant);
  font-size: 0.75rem;
}

/* ---- Section Headers ---- */
.section-header {
  margin-bottom: var(--space-16);
}

.section-header .label-sm {
  color: var(--secondary);
  margin-bottom: var(--space-4);
  display: block;
}

.section-header .headline-lg {
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--on-surface-variant);
  max-width: 560px;
}

/* ---- Timeline (Milestones) ---- */
.timeline {
  position: relative;
  padding-left: var(--space-12);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--secondary-container), var(--surface-container-high));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-10);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-12) - 5px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--secondary-container);
}

.timeline-year {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: var(--space-2);
}

.timeline-desc {
  color: var(--on-surface-variant);
}

/* ---- Leadership Cards ---- */
.leader-card {
  background: var(--surface-container-high);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

.leader-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--surface-container-highest), var(--secondary-container));
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--on-secondary-container);
}

.leader-name {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.leader-title-cn {
  color: var(--on-surface-variant);
  font-size: 0.8125rem;
  margin-bottom: var(--space-4);
}

.leader-role {
  color: var(--secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: var(--space-4);
}

.leader-bio {
  color: var(--on-surface-variant);
  font-size: 0.8125rem;
}

/* ---- Metric Cards ---- */
.metric-card {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.metric-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: var(--space-2);
}

.metric-label {
  color: var(--on-surface-variant);
  font-size: 0.8125rem;
}

/* ---- Contact Form ---- */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--surface-container-highest);
  border: 1px solid rgba(69, 71, 76, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 0.875rem;
  transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--secondary-container);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ---- Utility ---- */
.text-secondary { color: var(--secondary); }
.text-muted { color: var(--on-surface-variant); }
.text-center { text-align: center; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-16 { margin-bottom: var(--space-16); }
.mt-8 { margin-top: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }
.pt-nav { padding-top: 80px; }

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  .display-lg { font-size: 2rem; }
  .display-md { font-size: 1.75rem; }
  .headline-lg { font-size: 1.375rem; }
  .headline-md { font-size: 1.25rem; }
  .section { padding: var(--space-12) 0; }
  .container { padding: 0 var(--space-4); }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  /* Hero mobile */
  .hero { min-height: auto; padding: 120px 0 var(--space-12); }
  .hero-title { font-size: 2rem; }
  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
  }
  .hero-stats > div { flex: 1 1 40%; }
  .hero-stat-value { font-size: 1.75rem; }

  /* Nav mobile */
  .nav-inner { padding: var(--space-3) var(--space-4); }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(7, 19, 37, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: var(--space-6) var(--space-4);
    gap: var(--space-4);
  }
  .nav-links.open a { font-size: 1rem; padding: var(--space-2) 0; }
  .nav-links.open .nav-cta { text-align: center; padding: var(--space-3); display: block; }

  /* Footer mobile */
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  /* Cards mobile */
  .card, .card-surface, .metric-card { padding: var(--space-6); }
  .metric-value { font-size: 2rem; }

  /* Leader cards mobile */
  .leader-card { padding: var(--space-6); }

  /* Section header */
  .section-header { margin-bottom: var(--space-10); }

  /* Table scroll */
  .ir-table { font-size: 0.8125rem; }
  .ir-table thead th { padding: var(--space-3) var(--space-4); white-space: nowrap; }
  .ir-table tbody td { padding: var(--space-3) var(--space-4); }

  /* Buttons */
  .btn-primary, .btn-ghost { width: 100%; justify-content: center; }

  /* Timeline mobile */
  .timeline { padding-left: var(--space-8); }
  .timeline-item::before { left: calc(-1 * var(--space-8) - 5px); }

  /* Form mobile */
  .form-group .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .display-lg { font-size: 1.75rem; }
  .hero-stats > div { flex: 1 1 100%; }
  .hero-stat-value { font-size: 1.5rem; }
  .nav-logo-text { font-size: 1.1rem; }
}