/* ==========================================================================
   LAYOUT STYLES
   - Header with horizontal nav & theme toggle
   - Hero with Geometric Precision Design & dynamic theme support
   - Single-line Footer with brand, nav links, social, and theme toggle
   ========================================================================== */

/* Main Page Container */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Header & Horizontal Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
  transition: background-color var(--transition-speed) var(--transition-ease),
              border-color var(--transition-speed) var(--transition-ease);
}

.header-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  min-height: 40px;
  min-width: 40px;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  position: relative;
  padding: 0.35rem 0.15rem;
  transition: color var(--transition-speed) var(--transition-ease);
  display: inline-block;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary-color);
}

/* Active link: blue text with clean blue underline beneath it */
.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.header-signin-btn {
  white-space: nowrap;
  min-height: 40px;
  padding: 0.45rem 1.35rem;
  font-size: 0.925rem;
  border-radius: 8px;
}

/* Account Avatar & Dropdown */
.account-menu-container {
  position: relative;
  display: inline-block;
}

.account-avatar-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 2px solid var(--primary-color);
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface-elevated);
  transition: transform var(--transition-speed) var(--transition-ease);
}

.account-avatar-btn:hover {
  transform: scale(1.05);
}

.account-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.account-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: calc(100vw - 2rem);
  max-width: 280px;
  background-color: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  box-shadow: var(--dropdown-shadow);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  z-index: 120;
  display: none;
  animation: fadeIn 0.15s ease-out;
}

.account-dropdown-menu.show {
  display: block;
}

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

.account-info {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.85rem;
}

.account-info-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-display);
  word-break: break-word;
}

.account-info-email {
  font-size: 0.825rem;
  color: var(--text-secondary);
  word-break: break-all;
  margin-top: 0.2rem;
}

.account-dropdown-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dropdown-link-btn {
  width: 100%;
  text-align: center;
  min-height: 44px;
  padding: 0.6rem;
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Hero Section - Geometric Design
   - Precision geometric linework, concentric blueprint circles, isometric matrix
   - Responsive scaling and theme-reactive strokes/glows
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 7rem 1.5rem 8.5rem 1.5rem;
  min-height: 75vh;
  display: flex;
  align-items: center;
}

/* Background Geometric Composition */
.hero-geometric-wrapper {
  position: absolute;
  top: 50%;
  right: -5%;
  transform: translateY(-50%);
  width: 720px;
  height: 720px;
  pointer-events: none;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-geometric-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--geom-glow);
  filter: blur(20px);
  z-index: 1;
}

.hero-geometric-svg {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  animation: subtleFloat 16s ease-in-out infinite alternate;
}

@keyframes subtleFloat {
  0% { transform: scale(1) rotate(0deg); }
  100% { transform: scale(1.03) rotate(3deg); }
}

.hero-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
  padding: 0 1rem;
}

.hero-content {
  max-width: 580px;
  text-align: left;
}

.hero-subheading {
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.3;
}

.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 500;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  min-height: 48px;
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.25);
  transition: all var(--transition-speed) var(--transition-ease);
  text-decoration: none;
}

.hero-cta-btn:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 102, 255, 0.35);
}

.hero-cta-btn:active {
  transform: translateY(0);
}

.hero-arrow {
  font-size: 1.15rem;
  line-height: 1;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.hero-cta-btn:hover .hero-arrow {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   Single-Line Footer (Matches Reference & Request)
   - Brand logo, mail link, Terms & Policy, Support, Social, and Theme Toggle
   - Formatted in a sleek, horizontal single line
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--footer-border);
  background-color: var(--footer-bg);
  padding: 1.5rem 2rem;
  width: 100%;
  margin-top: auto;
  transition: background-color var(--transition-speed) var(--transition-ease),
              border-color var(--transition-speed) var(--transition-ease);
}

.footer-single-line {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-left {
  display: flex;
  align-items: center;
}

.footer-center {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.925rem;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-ease);
  white-space: nowrap;
}

.footer-link:hover {
  color: var(--primary-color);
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.social-icon-btn {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  min-width: 38px;
  min-height: 38px;
  border-radius: var(--radius-full);
  transition: all var(--transition-speed) var(--transition-ease);
  text-decoration: none;
}

.social-icon-btn:hover {
  color: var(--primary-color);
  background-color: var(--bg-hover);
  transform: translateY(-2px);
}

/* Theme Toggle Button - Fully theme-reactive */
.theme-toggle-btn {
  color: #000000;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  width: 38px;
  height: 38px;
  min-width: 38px;
  min-height: 38px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-ease);
}

.theme-toggle-btn svg {
  color: inherit;
  stroke: currentColor;
  transition: color var(--transition-speed) var(--transition-ease),
              stroke var(--transition-speed) var(--transition-ease);
}

.theme-toggle-btn:hover,
.theme-toggle-btn:focus-visible,
.theme-toggle-btn:active {
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: var(--bg-hover);
  transform: rotate(15deg);
}

.theme-toggle-btn:hover svg,
.theme-toggle-btn:focus-visible svg,
.theme-toggle-btn:active svg {
  color: var(--primary-color);
  stroke: var(--primary-color);
}

/* Dark Theme Sync */
[data-theme="dark"] .theme-toggle-btn {
  color: var(--text-primary);
  border-color: #334155;
  background-color: #1e293b;
  box-shadow: none;
}

[data-theme="dark"] .theme-toggle-btn svg {
  color: var(--text-primary);
  stroke: currentColor;
}

[data-theme="dark"] .theme-toggle-btn:hover,
[data-theme="dark"] .theme-toggle-btn:focus-visible,
[data-theme="dark"] .theme-toggle-btn:active {
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: #334155;
  transform: rotate(15deg);
}

[data-theme="dark"] .theme-toggle-btn:hover svg,
[data-theme="dark"] .theme-toggle-btn:focus-visible svg,
[data-theme="dark"] .theme-toggle-btn:active svg {
  color: var(--primary-color);
  stroke: var(--primary-color);
}

/* --------------------------------------------------------------------------
   Signup Page Layout
   -------------------------------------------------------------------------- */
.signup-page-wrapper {
  flex: 1;
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.25rem;
  background-color: var(--bg-body);
}

.signup-card {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.signup-subheading {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Continue with Google button */
.btn-google-auth {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed) var(--transition-ease);
}

.btn-google-auth:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

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

.btn-google-auth:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

[data-theme="dark"] .btn-google-auth {
  background-color: #1e293b;
  border-color: #334155;
  color: #f8fafc;
}

[data-theme="dark"] .btn-google-auth:hover {
  background-color: #334155;
  border-color: #475569;
}

.google-g-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: block;
}

/* --------------------------------------------------------------------------
   Hub Grid & General Content Cards
   -------------------------------------------------------------------------- */
.card-page-container {
  width: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.auth-card, .content-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 440px;
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all var(--transition-speed) var(--transition-ease);
}

.content-card-wide {
  max-width: 620px;
  text-align: left;
}

.hub-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.hub-title {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  text-align: center;
  color: var(--text-display);
}

.hub-description {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
  width: 100%;
}

.product-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  min-height: 44px;
  transition: all var(--transition-speed) var(--transition-ease);
}

.product-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.product-card-icon {
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card-icon .logo-submarker,
.product-card-icon .logo-submarker svg,
.product-card-icon .logo-submarker img {
  width: 48px;
  height: 48px;
}

.product-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.4rem;
  color: var(--text-display);
}

.product-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Doc Shell Pages */
.doc-shell-container {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
  flex: 1;
}

.doc-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.doc-brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  max-width: 260px;
  height: 68px;
}

.doc-brand-logo .logo-primary,
.doc-brand-logo svg,
.doc-brand-logo img {
  height: 68px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
  display: block;
}

.card-header-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-header-logo .logo-primary,
.card-header-logo svg,
.card-header-logo img {
  height: 64px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

.doc-submarker-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.doc-content-area {
  min-height: 240px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.doc-content-area h1,
.doc-content-area h2,
.doc-content-area h3,
.doc-content-area h4 {
  color: var(--text-display);
  margin-top: 2rem;
  margin-bottom: 0.85rem;
  font-weight: 700;
}

.doc-content-area h1:first-child,
.doc-content-area h2:first-child {
  margin-top: 0;
}

.doc-content-area p {
  margin-bottom: 1.15rem;
  color: var(--text-primary);
}

.doc-content-area ul,
.doc-content-area ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.doc-content-area li {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.doc-content-area table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.doc-content-area th,
.doc-content-area td {
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  text-align: left;
}

.doc-content-area th {
  background-color: var(--bg-surface-elevated);
  font-weight: 600;
  color: var(--text-display);
}

.doc-content-area hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.5rem 0;
}

/* 404 Layout */
.not-found-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}

.not-found-code {
  font-size: 6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
}

.not-found-title {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}

.not-found-desc {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 2rem auto;
  font-size: 0.95rem;
}

/* ==========================================================================
   MOBILE RESPONSIVENESS
   ========================================================================== */
@media (max-width: 900px) {
  .footer-single-line {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .footer-center {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.25rem;
  }
}

@media (max-width: 767px) {
  .header-container {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .header-left {
    gap: 0.85rem;
  }

  .nav-links {
    gap: 0.85rem;
  }

  .nav-link {
    font-size: 0.85rem;
    padding: 0.2rem 0;
  }

  .header-signin-btn {
    padding: 0.35rem 0.85rem;
    font-size: 0.825rem;
    min-height: 38px;
  }

  .hero-section {
    padding: 4.5rem 1.25rem 5.5rem 1.25rem;
    min-height: auto;
  }

  .hero-geometric-wrapper {
    top: auto;
    bottom: -90px;
    right: -80px;
    transform: none;
    width: 380px;
    height: 380px;
  }

  .hero-content {
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-primary-logo {
    max-width: 250px;
    margin: 0 auto 1.25rem auto;
  }

  .hero-subheading {
    font-size: 1.35rem;
    margin-bottom: 2rem;
  }

  .hero-cta-btn {
    width: auto;
    min-width: 210px;
  }
}