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

:root {
  --color-primary: #1a56db;
  --color-primary-dark: #1444b0;
  --color-primary-light: #3b82f6;
  --color-accent: #1e293b;
  --color-accent-light: #334155;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-bg-dark: #0f172a;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-text-inverse: #e2e8f0;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --color-success: #16a34a;
  --color-info: #0ea5e9;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --max-width: 1140px;
  --header-height: 64px;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  color: var(--color-accent);
}

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.75rem; font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }

p {
  margin-bottom: 1rem;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-accent);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  margin: 5px 0;
  transition: 0.3s;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* ===== Hero ===== */
.hero {
  padding: 64px 0 48px;
  text-align: center;
  background: linear-gradient(170deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

.badge {
  display: inline-block;
  padding: 5px 16px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.badge--outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

/* ===== Sections ===== */
.section {
  padding: 64px 0;
}

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

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  margin-bottom: 10px;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 520px;
  margin: 0 auto;
  font-size: 1rem;
}

.section--dark .section-header p {
  color: #94a3b8;
}

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
}

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 0;
  line-height: 1.6;
}

.feature-card--dark {
  background: var(--color-accent-light);
  border-color: #475569;
}

.feature-card--dark h3 {
  color: var(--color-white);
}

.feature-card--dark p {
  color: #94a3b8;
}

.feature-card--dark a {
  color: var(--color-primary-light);
}

/* ===== Steps ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 36px;
  counter-reset: step;
}

.step {
  text-align: center;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 auto 14px;
}

.step h3 {
  margin-bottom: 6px;
}

.step p {
  color: var(--color-text-light);
  font-size: 0.92rem;
}

/* ===== Internal Use Banner ===== */
.internal-banner {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  padding: 40px 0;
  text-align: center;
}

.internal-banner h2 {
  color: var(--color-white);
  margin-bottom: 12px;
  font-size: 1.5rem;
}

.internal-banner p {
  color: #94a3b8;
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.95rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 11px 24px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.2s;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.82rem;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-brand p {
  color: #64748b;
  font-size: 0.88rem;
  margin-top: 12px;
  line-height: 1.6;
}

.site-footer h4 {
  color: var(--color-white);
  margin-bottom: 14px;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.site-footer ul {
  list-style: none;
}

.site-footer ul li {
  margin-bottom: 8px;
  font-size: 0.88rem;
  color: #64748b;
}

.site-footer ul a {
  color: #64748b;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.site-footer ul a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding: 18px 0;
  text-align: center;
  font-size: 0.82rem;
  color: #475569;
}

/* ===== Legal Pages ===== */
.legal-page {
  padding: 48px 0 72px;
}

.legal-page .container {
  max-width: 800px;
}

.legal-page h1 {
  margin-bottom: 8px;
}

.legal-meta {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.legal-page h2 {
  font-size: 1.3rem;
  margin-top: 32px;
  margin-bottom: 10px;
}

.legal-page h3 {
  font-size: 1.1rem;
  margin-top: 20px;
  margin-bottom: 8px;
}

.legal-page p,
.legal-page li {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
}

.legal-page ul,
.legal-page ol {
  margin: 12px 0 20px 24px;
}

.legal-page li {
  margin-bottom: 6px;
}

.legal-highlight {
  background: rgba(26, 86, 219, 0.06);
  border-left: 4px solid var(--color-primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
}

.legal-highlight p {
  margin-bottom: 0;
  font-weight: 500;
}

/* ===== About Page ===== */
.about-hero {
  padding: 56px 0;
  text-align: center;
  background: linear-gradient(170deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.about-hero h1 {
  margin-bottom: 14px;
}

.about-hero p {
  color: var(--color-text-light);
  max-width: 540px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.about-content {
  padding: 48px 0;
}

.about-content .container {
  max-width: 800px;
}

.about-content h2 {
  margin-top: 32px;
  margin-bottom: 10px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.value-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 24px 20px;
  border-radius: var(--radius-md);
}

.value-card h3 {
  margin-bottom: 6px;
  color: var(--color-primary);
}

.value-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.company-info-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-top: 28px;
}

.company-info-box h3 {
  margin-bottom: 14px;
}

.company-info-box p {
  margin-bottom: 6px;
  font-size: 0.92rem;
}

/* ===== Contact Page ===== */
.contact-hero {
  padding: 56px 0;
  text-align: center;
  background: linear-gradient(170deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.contact-hero h1 {
  margin-bottom: 10px;
}

.contact-hero p {
  color: var(--color-text-light);
  font-size: 1rem;
}

.contact-section {
  padding: 48px 0 72px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.contact-card .card-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: var(--radius-sm);
  background: rgba(26, 86, 219, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.contact-card h4 {
  margin-bottom: 4px;
}

.contact-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.contact-form h3 {
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ===== Tool Preview Tabs ===== */
.tool-tabs {
  display: flex;
  gap: 2px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 4px 4px 0;
  border: 1px solid var(--color-border);
  border-bottom: none;
}

.tool-tab {
  flex: 1;
  padding: 12px 18px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all 0.2s;
}

.tool-tab:hover {
  color: var(--color-primary);
  background: rgba(26, 86, 219, 0.04);
}

.tool-tab.active {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: 0 -2px 0 var(--color-primary) inset;
}

.tool-panel {
  display: none;
}

.tool-panel.active {
  display: block;
}

/* ===== App Window ===== */
.app-window {
  border: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-bg);
}

.app-titlebar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: 0.82rem;
}

.app-dots {
  display: flex;
  gap: 6px;
}

.app-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: block;
}

.app-dots span:nth-child(1) { background: #ef4444; }
.app-dots span:nth-child(2) { background: #f59e0b; }
.app-dots span:nth-child(3) { background: #22c55e; }

.app-title {
  font-weight: 600;
  flex-shrink: 0;
}

.app-account {
  margin-left: auto;
  color: #64748b;
  font-size: 0.78rem;
}

.app-body {
  padding: 20px;
}

/* ===== KPI Cards ===== */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.kpi-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-text-light);
  margin-bottom: 4px;
  font-weight: 600;
}

.kpi-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 4px;
}

.kpi-change {
  font-size: 0.72rem;
  font-weight: 600;
}

.kpi-up { color: var(--color-success); }
.kpi-down { color: #dc2626; }

/* ===== Mini Chart ===== */
.mini-chart-section {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-bottom: 20px;
}

.mini-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.mini-chart-header h4 {
  font-size: 0.88rem;
  margin: 0;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.72rem;
  color: var(--color-text-light);
}

.legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 3px;
}

.legend-spend { background: var(--color-primary); }
.legend-conv { background: var(--color-info); }

.mini-chart {
  height: 100px;
  display: flex;
  align-items: flex-end;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  width: 100%;
  height: 100%;
}

.chart-bar {
  flex: 1;
  height: var(--h);
  background: var(--color-primary);
  border-radius: 3px 3px 0 0;
  position: relative;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.chart-bar:hover {
  opacity: 1;
}

.chart-bar-conv {
  position: absolute;
  bottom: 0;
  left: 25%;
  width: 50%;
  height: var(--hc);
  background: var(--color-info);
  border-radius: 2px 2px 0 0;
}

/* ===== App Tables ===== */
.app-table-wrap {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  overflow-x: auto;
}

.app-table-wrap h4 {
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.app-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.app-table thead th {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-light);
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  white-space: nowrap;
}

.app-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  white-space: nowrap;
}

.app-table tbody tr:hover {
  background: rgba(26, 86, 219, 0.02);
}

.app-table tbody tr:last-child td {
  border-bottom: none;
}

.td-name {
  font-weight: 600;
  color: var(--color-accent) !important;
}

.td-good { color: var(--color-success) !important; font-weight: 600; }
.td-ok { color: var(--color-primary) !important; font-weight: 600; }
.td-warn { color: #d97706 !important; font-weight: 600; }

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 6px;
}

.status-active { background: var(--color-success); }
.status-paused { background: #94a3b8; }

/* ===== Keyword Planner ===== */
.kw-search-bar {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-bottom: 14px;
}

.kw-search-bar label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.kw-input-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.kw-input {
  flex: 2;
  min-width: 160px;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
}

.kw-select {
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: default;
}

.kw-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding: 0 4px;
}

.kw-results-count {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.kw-results-actions {
  display: flex;
  gap: 6px;
}

.comp-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
}

.comp-high { background: #fef2f2; color: #dc2626; }
.comp-med { background: #fffbeb; color: #d97706; }
.comp-low { background: #f0fdf4; color: #16a34a; }

.match-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(26, 86, 219, 0.08);
  color: var(--color-primary);
}

.trend-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 20px;
}

.trend-bars span {
  display: block;
  width: 5px;
  height: var(--h);
  background: var(--color-primary);
  border-radius: 1px;
  opacity: 0.6;
}

.td-trend {
  padding-right: 16px !important;
}

/* ===== Report Controls ===== */
.report-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.report-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.report-actions {
  display: flex;
  gap: 6px;
}

.report-breakdown {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-bottom: 20px;
}

.report-breakdown h4 {
  font-size: 0.88rem;
  margin-bottom: 16px;
}

.breakdown-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.breakdown-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.breakdown-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.breakdown-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-accent);
}

.breakdown-pct {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-primary);
}

.progress-bar {
  height: 8px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 4px;
}

.progress-fill--secondary {
  background: var(--color-info);
}

.progress-fill--tertiary {
  background: #8b5cf6;
}

.breakdown-stats {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

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

  .contact-grid {
    grid-template-columns: 1fr;
  }

  h1 { font-size: 1.85rem; }
  .hero h1 { font-size: 2rem; }

  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .app-account {
    display: none;
  }

  .kw-input-row {
    flex-direction: column;
  }

  .kw-input, .kw-select {
    width: 100%;
  }

  .report-controls {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 56px;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 12px;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 2px;
  }

  .main-nav a {
    padding: 10px 14px;
  }

  .hero { padding: 40px 0 32px; }
  .hero h1 { font-size: 1.7rem; }
  .section { padding: 40px 0; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .steps { gap: 24px; }

  .form-row {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .tool-tabs {
    flex-direction: column;
    gap: 2px;
  }

  .tool-tab {
    border-radius: var(--radius-sm);
  }

  .tool-tab.active {
    box-shadow: none;
    background: var(--color-primary);
    color: var(--color-white);
  }

  .kpi-row {
    grid-template-columns: 1fr;
  }

  .kpi-value {
    font-size: 1.2rem;
  }

  .app-body {
    padding: 14px;
  }

  .app-titlebar {
    padding: 8px 12px;
    font-size: 0.78rem;
  }
}