/* ===================================================================
   KHANG LONG — CYBER PORTAL & SOLUTIONS HUB
   Futuristic Glassmorphism · Cyber Neon · Dynamic Dashboard
   Design System: Obsidian Black, Pure White, Electric Cyan (#00d4ff)
   =================================================================== */

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

:root {
  /* Claude Console Exact Dark Palette (#0b0b0b / #131316) */
  --bg-deep: #0a0a0c;
  --bg-surface: #0f0f12;
  --bg-card: #131316;
  --bg-card-hover: #1c1c20;
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-hover: rgba(255, 255, 255, 0.15);

  /* Accents & Pastel Tones (Claude Style) */
  --pastel-blue: #60a5fa;
  --pastel-blue-bg: #1e293b;
  --pastel-peach: #fb923c;
  --pastel-peach-bg: #372017;
  --pastel-cream: #fde047;
  --pastel-cream-bg: #332b14;
  --pastel-mint: #34d399;
  --pastel-mint-bg: #132e24;

  --cyan: #38bdf8;
  --cyan-glow: rgba(56, 189, 248, 0.12);
  --blue: #60a5fa;
  --purple: #a78bfa;
  --green: #34d399;
  --green-glow: rgba(52, 211, 153, 0.15);

  /* Typography Colors - High Contrast for WCAG AAA & Lighthouse 100 */
  --text-primary: #f4f4f5;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-accent: #ffffff;

  /* Fonts */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-main);
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --max-width: 1440px;
  --sidebar-w: 385px;
  --header-h: 70px;
  --header-bg: rgba(11, 11, 11, 0.96);
  --footer-bg: #0b0b0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* Light Mode Theme */
[data-theme="light"] {
  --bg-deep: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --header-bg: rgba(255, 255, 255, 0.94);
  --footer-bg: #f1f5f9;
  --glass-border: #e2e8f0;
  --glass-border-hover: #cbd5e1;

  --cyan: #0284c7;
  --cyan-glow: rgba(2, 132, 199, 0.1);
  --blue: #2563eb;
  --purple: #7c3aed;
  --green: #059669;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Background Atmosphere */
#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.ambient-orb {
  display: none;
}

/* Glass Card Utility - Minimalist Claude Obsidian Card */
.glass-panel {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel:hover {
  border-color: var(--glass-border-hover);
}

/* ================= HEADER ================= */
.top-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

/* Brand Identity */
.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-icon {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.brand-text {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-main);
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 3px;
  margin-right: -3px;
  text-transform: uppercase;
  line-height: 1;
  display: block;
}

[data-theme="light"] .brand-title {
  color: #0f172a;
}

.brand-sub {
  font-family: var(--font-main);
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 1.55px;
  margin-right: -1.55px;
  text-transform: uppercase;
  line-height: 1;
  display: block;
  margin-top: 4px;
}

/* Nav Menu with Slender Underline Just Fitting Text Width */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
}

.nav-item-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 4px;
  border-radius: 0;
  color: #a1a1aa;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
}

.nav-item-btn::after {
  display: none !important;
}

.nav-item-btn .nav-label {
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
  color: inherit;
}

.nav-item-btn .nav-label::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1.5px; /* Mảnh thanh lịch */
  background: #ffffff;
  border-radius: 999px;
  transition: width 0.22s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}

.nav-item-btn:hover {
  color: #ffffff;
  background: transparent;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.nav-item-btn:hover .nav-label::after {
  width: 100%;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.7);
}

.nav-item-btn.active {
  color: #ffffff;
  font-weight: 600;
  background: transparent;
  border: none;
}

.nav-item-btn.active .nav-label::after {
  width: 100%;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.nav-item-btn .badge-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 1px 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #a1a1aa;
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-weight: 600;
  transition: all 0.2s ease;
}

.nav-item-btn:hover .badge-pill,
.nav-item-btn.active .badge-pill {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.28);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: var(--glass-border-hover);
}

/* Account Button replacing Zalo */
.cta-account-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: #ffffff;
  color: #111113;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
  transition: all 0.22s ease;
}

.cta-account-btn:hover {
  background: #f4f4f5;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.25);
}

.cta-account-btn svg {
  color: #18181b;
}

[data-theme="light"] .cta-account-btn {
  background: #0f172a;
  color: #ffffff;
}

[data-theme="light"] .cta-account-btn svg {
  color: #ffffff;
}

.cta-contact-btn {
  padding: 8px 18px;
  background: #ffffff;
  color: #111113;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transition: all 0.2s ease;
}

.cta-contact-btn:hover {
  background: #e4e4e7;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

/* ================= AUTH MODAL (ĐĂNG NHẬP / ĐĂNG KÝ) ================= */
.auth-modal-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: 16px;
}

.auth-modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.auth-modal-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: #111114;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 30px 28px 26px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(56, 189, 248, 0.08);
  transform: scale(0.94) translateY(12px);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  color: #f4f4f5;
  font-family: var(--font-main);
}

.auth-modal-overlay.active .auth-modal-card {
  transform: scale(1) translateY(0);
}

/* Close Button (Minimalist Dark with Red Accent on Hover) */
.auth-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #a1a1aa;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 2;
}

.auth-close-btn:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: #ffffff;
  transform: scale(1.1);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.5);
}

/* Tabs: Đăng nhập / Đăng ký */
.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 22px;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.auth-tab-btn {
  background: transparent;
  border: none;
  padding: 10px 0 12px;
  font-size: 1.02rem;
  font-weight: 700;
  color: #71717a;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
  text-align: center;
}

.auth-tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0%;
  height: 3px;
  background: #38bdf8;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
  border-radius: 3px;
  transition: width 0.22s ease;
}

.auth-tab-btn:hover {
  color: #e4e4e7;
}

.auth-tab-btn.active {
  color: #ffffff;
}

.auth-tab-btn.active::after {
  width: 100%;
}

/* Alert Notification Banner - Themed Cyan & Emerald */
.auth-alert-banner {
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.auth-alert-banner.login-alert {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  color: #38bdf8;
}

.auth-alert-banner.register-alert {
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.22);
  color: #34d399;
}

.auth-alert-banner svg {
  flex-shrink: 0;
}

/* Sign in with Google Button - Dark Glass Card */
.auth-google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  border-radius: 10px;
  background: #18181b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f4f4f5;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-google-btn:hover {
  background: #232327;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

/* Divider "── Hoặc ──" */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 18px 0;
  color: #71717a;
  font-size: 0.84rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

/* Form Panels */
.auth-form-panel {
  display: none;
}

.auth-form-panel.active {
  display: block;
}

.auth-field-group {
  margin-bottom: 14px;
}

.auth-field-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #d4d4d8;
  margin-bottom: 6px;
}

.auth-input-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #18181b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 11px 14px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.auth-input-box:focus-within {
  border-color: #38bdf8;
  background: #1e1e24;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.auth-input-box svg.input-icon {
  color: #71717a;
  flex-shrink: 0;
}

.auth-input-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.9rem;
  color: #ffffff;
}

.auth-input-box input::placeholder {
  color: #52525b;
}

.auth-toggle-pwd {
  font-size: 0.82rem;
  font-weight: 500;
  color: #a1a1aa;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0 2px;
  user-select: none;
  transition: color 0.18s ease;
}

.auth-toggle-pwd:hover {
  color: #38bdf8;
}

.auth-send-code-btn {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
}

.auth-send-code-btn:hover {
  background: #38bdf8;
  color: #0b0b0b;
}

/* Options Row (Remember / Forgot) */
.auth-options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-size: 0.84rem;
}

.auth-remember-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #a1a1aa;
  cursor: pointer;
}

.auth-remember-label input[type="checkbox"] {
  accent-color: #38bdf8;
  width: 15px;
  height: 15px;
}

.auth-forgot-link {
  color: #a1a1aa;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.18s ease;
}

.auth-forgot-link:hover {
  color: #38bdf8;
  text-decoration: underline;
}

/* Primary Submit CTA - High Contrast White with Cyber Glow */
.auth-submit-btn {
  width: 100%;
  padding: 13px;
  border-radius: 10px;
  background: #ffffff;
  color: #0b0b0b;
  font-size: 0.96rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.15);
  transition: all 0.2s ease;
}

.auth-submit-btn:hover {
  background: #e4e4e7;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.35);
}

.auth-submit-btn:active {
  transform: translateY(0);
}

/* Switch Form Footer */
.auth-switch-footer {
  text-align: center;
  margin-top: 18px;
  font-size: 0.86rem;
  color: #71717a;
}

.auth-switch-link {
  color: #38bdf8;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: transparent;
  font-size: inherit;
  font-family: inherit;
  padding: 0;
  margin-left: 4px;
  transition: color 0.18s ease;
}

.auth-switch-link:hover {
  color: #7dd3fc;
  text-decoration: underline;
}

/* Light Mode Overrides for Auth Modal */
[data-theme="light"] .auth-modal-card {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.2);
}

[data-theme="light"] .auth-close-btn {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #64748b;
}

[data-theme="light"] .auth-tabs {
  border-bottom-color: #e2e8f0;
}

[data-theme="light"] .auth-tab-btn {
  color: #64748b;
}

[data-theme="light"] .auth-tab-btn.active {
  color: #0f172a;
}

[data-theme="light"] .auth-tab-btn::after {
  background: #0284c7;
  box-shadow: 0 0 10px rgba(2, 132, 199, 0.4);
}

[data-theme="light"] .auth-google-btn {
  background: #f8fafc;
  border-color: #e2e8f0;
  color: #334155;
}

[data-theme="light"] .auth-google-btn:hover {
  background: #f1f5f9;
}

[data-theme="light"] .auth-divider {
  color: #94a3b8;
}

[data-theme="light"] .auth-divider::before,
[data-theme="light"] .auth-divider::after {
  background: #e2e8f0;
}

[data-theme="light"] .auth-field-group label {
  color: #334155;
}

[data-theme="light"] .auth-input-box {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] .auth-input-box:focus-within {
  border-color: #0284c7;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

[data-theme="light"] .auth-input-box input {
  color: #0f172a;
}

[data-theme="light"] .auth-input-box input::placeholder {
  color: #94a3b8;
}

[data-theme="light"] .auth-submit-btn {
  background: #0f172a;
  color: #ffffff;
}

[data-theme="light"] .auth-submit-btn:hover {
  background: #1e293b;
}

[data-theme="light"] .auth-switch-link {
  color: #0284c7;
}

/* ================= LAYOUT CONTAINER ================= */
.main-wrapper {
  max-width: var(--max-width);
  margin: 20px auto 40px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: 28px;
  align-items: start; /* CRITICAL: Enables sticky positioning */
  position: relative;
  z-index: 10;
}

/* ================= SIDEBAR PROFILE (STICKY & SCREEN HEIGHT) ================= */
.sidebar-profile {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  max-height: calc(100vh - var(--header-h) - 32px);
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  display: flex;
  flex-direction: column;
}

.sidebar-profile::-webkit-scrollbar {
  display: none;
}

.profile-card {
  padding: 24px 20px 20px;
  text-align: center;
  position: relative;
  background: #0b0b0b !important;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .profile-card {
  background: #ffffff !important;
  border-color: #e2e8f0;
}

.profile-card::before {
  display: none;
}

/* Avatar Frame - Minimalist with Running Orbit Ring */
.avatar-wrapper {
  position: relative;
  width: 104px;
  height: 104px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-ring-svg {
  position: absolute;
  inset: -9px;
  width: calc(100% + 18px);
  height: calc(100% + 18px);
  pointer-events: none;
  z-index: 2;
  overflow: visible;
}

.avatar-spinner-group {
  transform-origin: 50px 50px;
  animation: rotateAvatarRing 4s linear infinite;
}

@keyframes rotateAvatarRing {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.avatar-img-box {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  position: relative;
  background: #0b0b0b;
  z-index: 1;
}

.avatar-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.online-status-dot {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 14px;
  height: 14px;
  background: #22c55e;
  border: 2.5px solid #0b0b0b;
  border-radius: 50%;
  z-index: 3;
}

.profile-name {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 4px;
  letter-spacing: -0.2px;
}

.verified-icon {
  color: #a1a1aa;
  display: inline-flex;
}

.profile-role {
  font-size: 0.76rem;
  font-weight: 600;
  color: #a1a1aa;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.profile-founder {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: #d4d4d8;
  white-space: nowrap;
  margin-bottom: 10px;
}

[data-theme="light"] .profile-founder {
  color: #334155;
}

.profile-tagline {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
}

/* Stats Row */
.stats-counter-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 16px;
}

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

.stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #f4f4f5;
}

[data-theme="light"] .stat-value {
  color: #0f172a;
}

.stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

/* Contact Action Buttons - Claude Console Input Style */
.contact-actions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.contact-btn-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  background: #171717;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.contact-btn-item:hover {
  background: #232326;
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.contact-btn-item.zalo-btn {
  background: #1a1a1d;
  border: 1px solid rgba(255, 255, 255, 0.11);
}

.contact-btn-item.zalo-btn:hover {
  background: #26262a;
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: none;
}

/* Quick Info List */
.quick-info-list {
  list-style: none;
  text-align: left;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.quick-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.4;
}

.quick-info-list svg {
  flex-shrink: 0;
  color: #71717a;
  margin-top: 2px;
}

/* ================= MAIN CONTENT AREA ================= */
.content-area {
  display: flex;
  flex-direction: column;
  gap: 28px;
  min-width: 0;
}

/* 1. KHANG LONG AI ASSISTANT CHAT */
.chat-assistant-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.chat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--glass-border);
}

.chat-brand-identity {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  overflow: hidden;
  background: #18181b;
  border: 1.5px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-avatar-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chat-title-text h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.chat-status-active {
  font-size: 0.78rem;
  color: #22c55e;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.chat-status-active::before {
  content: '';
  width: 7px;
  height: 7px;
  background: #22c55e;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.85);
  animation: statusBlink 1.4s ease-in-out infinite;
}

@keyframes statusBlink {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.9);
  }
  50% {
    opacity: 0.25;
    transform: scale(0.85);
    box-shadow: 0 0 2px rgba(34, 197, 94, 0.2);
  }
}

/* Chat Messages */
.chat-messages-container {
  max-height: 280px;
  min-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 10px 4px;
  margin-bottom: 16px;
}

.chat-bubble {
  max-width: 85%;
  padding: 11px 15px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.5;
}

.chat-bubble.ai-msg {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  align-self: flex-start;
  border-top-left-radius: 2px;
}

.chat-bubble.user-msg {
  background: #27272a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f4f4f5;
  align-self: flex-end;
  border-top-right-radius: 2px;
}

/* Typing Indicator Animation */
.chat-bubble.ai-typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background: #38bdf8;
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0); opacity: 0.3; }
  40% { transform: scale(1); opacity: 1; }
}

/* Chat Prompt Suggestions */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.suggestion-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.suggestion-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.16);
}

/* Chat Input Bar */
.chat-input-bar {
  display: flex;
  gap: 10px;
}

.chat-input-field {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 11px 15px;
  color: #fff;
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.chat-input-field:focus {
  border-color: rgba(255, 255, 255, 0.25);
}

.chat-send-btn {
  background: #ffffff;
  color: #111113;
  border: none;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.chat-send-btn:hover {
  background: #e4e4e7;
}

/* 2. TECH STACK PILLS */
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  letter-spacing: -0.2px;
}

.section-title svg {
  color: #71717a;
}

/* 2. TECH STACK PILLS */
.tech-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.tech-cat-card {
  padding: 20px;
}

.tech-cat-header {
  font-size: 0.94rem;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  letter-spacing: -0.1px;
  border-bottom: none !important;
  padding-bottom: 0 !important;
}

[data-theme="light"] .tech-cat-header {
  border-bottom: none !important;
}

.tech-cat-header svg {
  flex-shrink: 0;
}

/* Feature Capability List - Dim by default, Bright on Hover, No borders/lines */
.tech-pills-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tech-pill {
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 400;
  padding: 6px 8px;
  border-radius: 6px;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  color: #71717a !important; /* Muted/dim by default */
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  line-height: 1.4;
  cursor: default;
}

/* Checkmark indicator - dim by default */
.tech-pill::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background-color: #3f3f46; /* Dim dark gray by default */
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") no-repeat center / contain;
  transition: all 0.2s ease;
}

/* Lights up on Hover! Pure text illumination, completely stationary (no jump/shift) */
.tech-pill:hover {
  color: #ffffff !important; /* Lights up bright white */
  background: transparent !important;
  transform: none !important;
  border: none !important;
  box-shadow: none !important;
}

/* On hover, checkmark lights up with domain accent color & glow */
.tech-cat-card:nth-child(1) .tech-pill:hover::before {
  background-color: #38bdf8;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.8));
}

.tech-cat-card:nth-child(2) .tech-pill:hover::before {
  background-color: #38bdf8;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.8));
}

.tech-cat-card:nth-child(3) .tech-pill:hover::before {
  background-color: #818cf8;
  filter: drop-shadow(0 0 6px rgba(129, 140, 248, 0.8));
}

.tech-cat-card:nth-child(4) .tech-pill:hover::before {
  background-color: #34d399;
  filter: drop-shadow(0 0 6px rgba(52, 211, 153, 0.8));
}

.tech-cat-card:nth-child(5) .tech-pill:hover::before {
  background-color: #c084fc;
  filter: drop-shadow(0 0 6px rgba(192, 132, 252, 0.8));
}

.tech-cat-card:nth-child(6) .tech-pill:hover::before {
  background-color: #fb923c;
  filter: drop-shadow(0 0 6px rgba(251, 146, 60, 0.8));
}

[data-theme="light"] .tech-pill {
  color: #94a3b8 !important;
}

[data-theme="light"] .tech-pill::before {
  background-color: #cbd5e1;
}

[data-theme="light"] .tech-pill:hover {
  color: #0f172a !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}

/* 3. FEATURED PROJECTS GRID */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.project-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-top-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.project-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(14, 165, 233, 0.15);
  color: var(--cyan);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.project-location {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.project-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.project-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.project-highlights-list {
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.project-highlights-list li {
  position: relative;
  padding-left: 16px;
}

.project-highlights-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--glass-border);
  padding-top: 14px;
}

.tech-tag-sm {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

/* 4. CAREER TIMELINE */
.timeline-card {
  padding: 24px;
}

.timeline-list {
  position: relative;
  padding-left: 22px;
  border-left: 1.5px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #71717a;
  border: 2px solid var(--bg-card);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: #a1a1aa;
  margin-bottom: 2px;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 0.85rem;
  font-weight: 500;
  color: #d4d4d8;
  margin-bottom: 5px;
}

.timeline-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Collapsible Timeline Wrapper & Expand Button */
.timeline-wrapper {
  position: relative;
  transition: max-height 0.4s ease;
  overflow: hidden;
}

.timeline-wrapper.collapsed {
  max-height: 290px; /* Hiển thị khoảng 1/3 nội dung */
}

.timeline-wrapper.expanded {
  max-height: 2500px;
}

.timeline-fade-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 90px;
  background: linear-gradient(to bottom, rgba(28, 28, 32, 0) 0%, var(--bg-card) 95%);
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease;
}

[data-theme="light"] .timeline-fade-overlay {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, var(--bg-card) 95%);
}

.timeline-wrapper.expanded .timeline-fade-overlay {
  opacity: 0;
  pointer-events: none;
}

.timeline-toggle-area {
  margin-top: 16px;
  text-align: center;
  position: relative;
  z-index: 2;
}

.timeline-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: #f4f4f5;
  font-family: var(--font-main);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.timeline-expand-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

.timeline-expand-btn .chevron-icon {
  transition: transform 0.3s ease;
}

.timeline-wrapper.expanded + .timeline-toggle-area .chevron-icon,
.timeline-toggle-area.is-expanded .chevron-icon {
  transform: rotate(180deg);
}

[data-theme="light"] .timeline-expand-btn {
  background: rgba(0, 0, 0, 0.04);
  border-color: #cbd5e1;
  color: #1e293b;
}

[data-theme="light"] .timeline-expand-btn:hover {
  background: rgba(0, 0, 0, 0.08);
  border-color: #94a3b8;
}

/* 5. TOOLS & SERVICES DIRECTORY (Claude Console Style) */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  padding: 22px 20px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.tool-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.tool-icon-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}

.tool-emoji {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  transition: transform 0.2s ease;
}

.tool-card:hover .tool-emoji {
  transform: scale(1.08);
}

.tool-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: #d4d4d8;
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.tool-name {
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.2px;
  margin-top: 2px;
}

.tool-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex-grow: 1;
}

/* ================= FOOTER ================= */
.site-footer {
  margin-top: 60px;
  border-top: 1px solid var(--glass-border);
  background: var(--footer-bg);
  padding: 30px 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  z-index: 10;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ================= LIGHT MODE OVERRIDES ================= */
[data-theme="light"] .glass-panel {
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .brand-title {
  color: #0f172a;
}

[data-theme="light"] .brand-sub {
  color: #0284c7;
}

[data-theme="light"] .nav-item-btn {
  color: #475569;
}

[data-theme="light"] .nav-item-btn:hover,
[data-theme="light"] .nav-item-btn.active {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .nav-item-btn .badge-pill {
  background: rgba(2, 132, 199, 0.12);
  color: #0284c7;
}

[data-theme="light"] .theme-toggle-btn {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .theme-toggle-btn:hover {
  border-color: #0284c7;
  box-shadow: 0 0 12px rgba(2, 132, 199, 0.2);
}

[data-theme="light"] .contact-btn-item {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #1e293b;
}

[data-theme="light"] .contact-btn-item:hover {
  background: #f0f9ff;
  border-color: #0284c7;
  color: #0284c7;
}

[data-theme="light"] .contact-btn-item.zalo-btn {
  background: rgba(0, 104, 255, 0.07);
  border-color: rgba(0, 104, 255, 0.25);
  color: #0052cc;
}

[data-theme="light"] .stat-value {
  color: #0f172a;
}

[data-theme="light"] .chat-input-field {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .chat-bubble.ai-msg {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .tech-pill {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #334155;
}

[data-theme="light"] .tech-pill.highlight {
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.3);
  color: #0284c7;
}

[data-theme="light"] .tech-tag-sm {
  background: #f1f5f9;
  color: #475569;
}

[data-theme="light"] .project-title,
[data-theme="light"] .timeline-role,
[data-theme="light"] .tool-name,
[data-theme="light"] .section-title,
[data-theme="light"] .profile-name,
[data-theme="light"] .chat-title-text h3 {
  color: #0f172a;
}

[data-theme="light"] .site-footer {
  background: var(--footer-bg);
  border-color: #e2e8f0;
  color: #64748b;
}

/* ================= RESPONSIVE & MOBILE POLISH ================= */

/* Hide mobile-only elements by default on desktop */
.mobile-menu-btn,
.mobile-nav-drawer,
.profile-mobile-toggle-btn,
.mobile-ai-trigger-banner,
.mobile-floating-ai-btn,
.chat-mobile-close-btn {
  display: none;
}

@media (max-width: 1024px) {
  .main-wrapper {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sidebar-profile {
    max-width: 540px;
    margin: 0 auto;
    width: 100%;
    position: static;
    max-height: none;
  }
}

@media (max-width: 768px) {
  /* 1. Header & Navigation */
  .nav-menu {
    display: none;
  }
  .header-container {
    padding: 0 16px;
    height: 60px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
  }
  .brand-title {
    font-size: 1.15rem;
    letter-spacing: 1.5px;
  }
  .brand-sub {
    font-size: 0.55rem;
    letter-spacing: 0.8px;
  }

  /* Account Button on Mobile: Compact Icon Only */
  .cta-account-text {
    display: none;
  }
  .cta-account-btn {
    width: 38px;
    height: 38px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }

  /* Mobile Hamburger Button */
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--glass-border);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(56, 189, 248, 0.35);
  }

  /* Mobile Navigation Drawer */
  .mobile-nav-drawer {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0f1015;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.95);
    padding: 16px 20px 20px;
    z-index: 998;
    animation: fadeInDown 0.22s ease-out forwards;
  }
  .mobile-nav-drawer.open {
    display: block;
  }
  .mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
  }
  .mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.18s ease;
  }
  .mobile-nav-link:hover,
  .mobile-nav-link.active {
    color: #ffffff;
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.3);
  }
  .mobile-nav-contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  .mnc-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 8px;
    border-radius: 10px;
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
  }
  .mnc-phone {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  .mnc-zalo {
    background: rgba(0, 104, 255, 0.18);
    color: #38bdf8;
    border: 1px solid rgba(0, 104, 255, 0.3);
  }

  /* 2. Main Layout on Mobile */
  .main-wrapper {
    margin: 12px auto 60px;
    padding: 0 14px;
    gap: 16px;
  }

  /* 3. Collapsible Profile Trigger Button on Mobile */
  .profile-mobile-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 12px 16px;
    background: rgba(18, 18, 22, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    transition: all 0.22s ease;
    text-align: left;
    color: #f4f4f5;
  }
  .profile-mobile-toggle-btn:hover {
    border-color: rgba(56, 189, 248, 0.4);
    background: rgba(24, 24, 30, 0.95);
  }
  .pm-user-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .pm-avatar-mini {
    position: relative;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
  }
  .pm-avatar-mini img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 1.5px solid rgba(56, 189, 248, 0.5);
  }
  .pm-status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background: #10b981;
    border: 2px solid #0b0b0b;
    border-radius: 50%;
  }
  .pm-user-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 5px;
  }
  .verified-icon-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    background: #38bdf8;
    color: #0b0b0b;
    font-size: 0.65rem;
    font-weight: 800;
    border-radius: 50%;
  }
  .pm-user-title {
    font-size: 0.72rem;
    color: #94a3b8;
    margin-top: 1px;
  }
  .pm-expand-action {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #38bdf8;
    font-size: 0.78rem;
    font-weight: 600;
  }
  .pm-chevron-icon {
    transition: transform 0.28s ease;
  }
  .profile-mobile-toggle-btn.expanded .pm-chevron-icon {
    transform: rotate(180deg);
  }

  /* Detailed Profile Card on Mobile: Collapsed by Default */
  #profile-card-content {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding: 0 16px;
    margin-top: 0;
    border-width: 0;
    pointer-events: none;
    transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease, margin 0.25s ease, padding 0.25s ease;
  }
  #profile-card-content.open {
    max-height: 2500px;
    opacity: 1;
    padding: 20px 16px;
    margin-top: 10px;
    border-width: 1px;
    pointer-events: auto;
  }

  /* 4. Khang Long AI Assistant on Mobile */
  .mobile-ai-trigger-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(18, 18, 24, 0.88);
    border: 1px solid rgba(56, 189, 248, 0.25);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    margin-bottom: 8px;
  }
  .matb-avatar {
    position: relative;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
  }
  .matb-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 1.5px solid #38bdf8;
  }
  .matb-text {
    flex: 1;
  }
  .matb-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .ai-live-badge {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 1px 7px;
    font-size: 0.65rem;
    border-radius: 999px;
    font-weight: 700;
  }
  .matb-desc {
    font-size: 0.74rem;
    color: #94a3b8;
    margin-top: 2px;
  }
  .matb-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    background: #38bdf8;
    color: #0b0b0b;
    border: none;
    border-radius: 12px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.35);
  }

  /* Inline Chat Card on Mobile is hidden until opened */
  #chat-assistant-card {
    display: none;
  }

  /* When Chat is Active on Mobile: Modern Floating Bottom Sheet Modal */
  #chat-assistant-card.active-mobile {
    display: flex;
    flex-direction: column;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 82vh;
    max-height: 85vh;
    background: #0f1015;
    border-radius: 24px 24px 0 0;
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-bottom: none;
    z-index: 1000;
    box-shadow: 0 -12px 48px rgba(0, 0, 0, 0.85);
    animation: slideUpModal 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }
  .chat-mobile-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #a1a1aa;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: auto;
  }
  .chat-mobile-close-btn:hover {
    background: #ef4444;
    color: #ffffff;
  }

  body.ai-chat-open .mobile-floating-ai-btn {
    display: none !important;
  }

  /* Floating AI Button at bottom-right corner */
  .mobile-floating-ai-btn {
    position: fixed;
    bottom: 24px;
    right: 20px;
    z-index: 990;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px 8px 8px;
    border-radius: 999px;
    background: rgba(15, 16, 22, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1.5px solid rgba(56, 189, 248, 0.5);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(56, 189, 248, 0.25);
    cursor: pointer;
    color: #ffffff;
    transition: all 0.22s ease;
  }
  .mobile-floating-ai-btn:hover {
    transform: translateY(-2px);
    border-color: #38bdf8;
    box-shadow: 0 12px 35px rgba(56, 189, 248, 0.4);
  }
  .mf-ai-avatar {
    position: relative;
    width: 36px;
    height: 36px;
    border-radius: 50%;
  }
  .mf-ai-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
  }
  .mf-pulse-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #10b981;
    border: 1.5px solid #0f1015;
    box-shadow: 0 0 8px #10b981;
  }
  .mf-ai-text {
    font-size: 0.85rem;
    font-weight: 700;
    color: #38bdf8;
    letter-spacing: 0.3px;
  }

  /* Footer adjustments */
  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUpModal {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}