/* ==========================================================================
   EcrioX - Design System & Global Stylesheet
   Brand: EcrioX | Tagline: One Platform. Endless Possibilities.
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --color-primary: #2563eb;          /* Electric Blue */
  --color-primary-hover: #1d4ed8;
  --color-primary-light: rgba(37, 99, 235, 0.08);
  --color-primary-border: rgba(37, 99, 235, 0.2);

  --color-accent: #3b82f6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* Neutrals */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-subtle-hover: #e2e8f0;

  --border-color: #e2e8f0;
  --border-color-hover: #cbd5e1;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #94a3b8;
  --text-inverse: #ffffff;

  /* Badges */
  --badge-avail-bg: rgba(16, 185, 129, 0.1);
  --badge-avail-text: #059669;
  --badge-soon-bg: rgba(245, 158, 11, 0.1);
  --badge-soon-text: #d97706;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);

  /* Radius & Transitions */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --header-height: 4.25rem;
  --container-max: 1200px;
}

/* Dark Mode Theme */
[data-theme="dark"] {
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-primary-light: rgba(59, 130, 246, 0.15);
  --color-primary-border: rgba(59, 130, 246, 0.3);

  --bg-page: #090d16;
  --bg-surface: #111827;
  --bg-surface-elevated: #1f2937;
  --bg-subtle: #1a2234;
  --bg-subtle-hover: #242f47;

  --border-color: #1f293d;
  --border-color-hover: #334155;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #0f172a;

  --badge-avail-bg: rgba(16, 185, 129, 0.15);
  --badge-avail-text: #34d399;
  --badge-soon-bg: rgba(245, 158, 11, 0.15);
  --badge-soon-text: #fbbf24;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.25s ease, color 0.25s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.page-wrapper {
  flex: 1 0 auto;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  transition: var(--transition);
}

[data-theme="dark"] .site-header {
  background-color: rgba(9, 13, 22, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.logo-symbol {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.brand-logo .accent-dot {
  color: var(--color-primary);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.btn-icon:hover {
  border-color: var(--color-primary-border);
  color: var(--color-primary);
  background-color: var(--bg-subtle);
}

.mobile-toggle {
  display: none;
}

/* Mobile Navigation Drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-page);
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  overflow-y: auto;
  z-index: 99;
}

.mobile-nav.open {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-nav .nav-link {
  font-size: 1.15rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--border-color-hover);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-available {
  background-color: var(--badge-avail-bg);
  color: var(--badge-avail-text);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-coming-soon {
  background-color: var(--badge-soon-bg);
  color: var(--badge-soon-text);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-category {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2.25rem;
  line-height: 1.6;
}

/* Hero Search Bar */
.search-wrapper {
  max-width: 620px;
  margin: 0 auto 2rem;
  position: relative;
}

.search-input-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.75rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.search-input-box:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light), var(--shadow-lg);
}

.search-icon {
  color: var(--text-subtle);
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  border: none;
  background: none;
  font-size: 1.05rem;
  color: var(--text-main);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-subtle);
}

/* Search Dropdown Results */
.search-results-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 380px;
  overflow-y: auto;
  z-index: 50;
  display: none;
  text-align: left;
}

.search-results-dropdown.active {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: var(--bg-subtle);
}

.search-result-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.15rem;
}

.search-result-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Section Styling
   ========================================================================== */
.section {
  padding: 4.5rem 0;
}

.section-subtle {
  background-color: var(--bg-subtle);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-pill {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  display: inline-block;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Cards & Grid Layouts
   ========================================================================== */
.grid-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.grid-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

/* Tool Card */
.tool-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.tool-card:hover {
  border-color: var(--color-primary-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.tool-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.tool-card-body {
  flex: 1;
}

.tool-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.tool-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

.tool-card.coming-soon {
  opacity: 0.9;
}

.tool-card.coming-soon:hover {
  border-color: var(--border-color-hover);
  transform: none;
}

/* Category Card */
.category-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  border-color: var(--color-primary-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.category-icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.category-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.category-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.category-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   Features ("Why EcrioX")
   ========================================================================== */
.grid-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.feature-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-box:hover {
  border-color: var(--color-primary-border);
}

.feature-icon-wrapper {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-box h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.feature-box p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   How It Works Steps
   ========================================================================== */
.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  position: relative;
}

.step-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-number {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0 auto 1.25rem;
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-main);
}

.faq-question:hover {
  background-color: var(--bg-subtle);
}

.faq-chevron {
  transition: transform 0.2s ease;
  color: var(--text-subtle);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease-out;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  padding-bottom: 1.25rem;
}

/* ==========================================================================
   AdSense Container Slots (Policy Compliant, Non-Intrusive)
   ========================================================================== */
.ad-slot-container {
  width: 100%;
  max-width: 970px;
  margin: 2.5rem auto;
  padding: 0 1rem;
}

.ad-slot-card {
  background-color: var(--bg-subtle);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  min-height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-subtle);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ==========================================================================
   Reusable Tool Page Layout & Workspace
   ========================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-subtle);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

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

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs .separator {
  color: var(--border-color);
}

.tool-header-block {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 2.5rem;
}

.tool-main-workspace {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  max-width: 860px;
  margin: 0 auto 3.5rem;
}

.dropzone-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  text-align: center;
  background-color: var(--bg-page);
  cursor: pointer;
  transition: var(--transition);
}

.dropzone-area:hover, .dropzone-area.dragover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.dropzone-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  color: var(--color-primary);
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.dropzone-sub {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.workspace-controls {
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-color);
}

.control-group {
  margin-bottom: 1.25rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.control-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-page);
  color: var(--text-main);
}

.control-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.results-box {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

/* Tool Content Sections (For SEO, Instructions, Technical Value) */
.tool-content-section {
  max-width: 860px;
  margin: 0 auto 3rem;
}

.tool-content-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.tool-content-section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
  color: var(--text-main);
}

.tool-content-section p, .tool-content-section li {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.tool-content-section ul, .tool-content-section ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Static Pages (About, Contact, Privacy, Terms)
   ========================================================================== */
.page-header {
  padding: 3.5rem 0 2rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  margin-bottom: 3rem;
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
}

.page-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

.article-content {
  max-width: 820px;
  margin: 0 auto 4rem;
  background-color: var(--bg-surface);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
  color: var(--text-main);
}

.article-content p, .article-content li {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.article-content ul {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4.5rem 0 2rem;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 1rem 0 1.5rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  background-color: var(--text-main);
  color: var(--bg-page);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(10px);
  animation: toastIn 0.25s forwards, toastOut 0.25s 2.75s forwards;
}

@keyframes toastIn {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateY(-10px); }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-section {
    padding: 3rem 0 2.5rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .tool-main-workspace, .article-content {
    padding: 1.5rem;
  }
}