.dd-tool,
.dd-tools-grid,
.dd-tool-page,
.dd-home,
.dd-directory {
  --dd-border: #e5eaf1;
  --dd-text: #0b1830;
  --dd-muted: #667085;
  --dd-surface: #ffffff;
  --dd-soft: #f6f8fb;
  --dd-accent: #0b1830;
  --dd-blue: #10a9ee;
  --dd-radius: 18px;
  box-sizing: border-box;
}

.dd-tool *,
.dd-tools-grid *,
.dd-tool-page *,
.dd-home *,
.dd-directory * { box-sizing: border-box; }

.dd-tool {
  max-width: 980px;
  margin: 20px auto;
  padding: clamp(22px, 4vw, 38px);
  background: var(--dd-surface);
  border: 1px solid var(--dd-border);
  border-radius: var(--dd-radius);
  box-shadow: 0 14px 36px rgba(11, 24, 48, 0.07);
  color: var(--dd-text);
}

.dd-tool__header { margin-bottom: 26px; }
.dd-tool__eyebrow,
.dd-kicker,
.dd-tool-card__badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #58667a;
}
.dd-tool__eyebrow { margin-bottom: 8px; }
.dd-tool__title { margin: 0 0 9px; font-size: clamp(26px, 4vw, 38px); line-height: 1.12; color: var(--dd-text); }
.dd-tool__subtitle { margin: 0; color: var(--dd-muted); font-size: 16px; line-height: 1.65; }

.dd-tool__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.dd-tool__grid--engagement { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.dd-field { display: flex; flex-direction: column; gap: 7px; font-weight: 700; font-size: 14px; color: var(--dd-text); }
.dd-field input,
.dd-field select {
  width: 100%;
  min-height: 50px;
  padding: 11px 13px;
  background: #fff;
  color: var(--dd-text);
  border: 1px solid #d5dce7;
  border-radius: 10px;
  font: inherit;
  font-weight: 500;
  outline: none;
}
.dd-field input:focus,
.dd-field select:focus { border-color: var(--dd-blue); box-shadow: 0 0 0 3px rgba(16, 169, 238, .12); }

.dd-tool__actions,
.dd-hero__actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.dd-btn,
.dd-copy {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform .15s ease, box-shadow .15s ease;
}
.dd-btn--primary { background: var(--dd-accent); color: #fff !important; }
.dd-btn--secondary { background: var(--dd-soft); color: var(--dd-text) !important; border: 1px solid var(--dd-border); }
.dd-btn:hover,
.dd-copy:hover { transform: translateY(-1px); }

.dd-result {
  margin-top: 24px;
  padding: 22px;
  border-radius: 15px;
  background: linear-gradient(135deg, #f7fbff 0%, #f6f8fb 100%);
  border: 1px solid #dce8f2;
}
.dd-result__label { color: var(--dd-muted); font-weight: 700; font-size: 14px; }
.dd-result__value { margin-top: 4px; font-size: clamp(32px, 5vw, 48px); font-weight: 850; line-height: 1.05; letter-spacing: -.03em; color: var(--dd-text); }
.dd-result__details { margin-top: 14px; color: var(--dd-muted); line-height: 1.7; }
.dd-result-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.dd-result-stat { padding: 12px 14px; background: #fff; border: 1px solid var(--dd-border); border-radius: 10px; }
.dd-result-stat span { display: block; font-size: 12px; color: var(--dd-muted); text-transform: uppercase; letter-spacing: .05em; font-weight: 800; }
.dd-result-stat strong { display: block; margin-top: 4px; color: var(--dd-text); font-size: 17px; }
.dd-copy { margin-top: 14px; padding: 8px 12px; background: #fff; color: var(--dd-text); border: 1px solid #d5dce7; font-size: 13px; }
.dd-formula { margin: 16px 0 0; color: var(--dd-muted); font-size: 13px; }
.dd-error { color: #b42318; font-weight: 700; }

.dd-tool-page { max-width: 1100px; margin: 0 auto; }
.dd-guide { max-width: 980px; margin: 30px auto; color: var(--dd-text); }
.dd-guide__section { margin: 0 0 32px; }
.dd-guide__section h2 { margin: 0 0 10px; color: var(--dd-text); font-size: clamp(23px, 3vw, 30px); }
.dd-guide__section p { margin: 0; color: #48566a; font-size: 16px; line-height: 1.8; }
.dd-guide__callout { padding: 24px; background: var(--dd-soft); border: 1px solid var(--dd-border); border-radius: 15px; }

.dd-faq { display: grid; gap: 10px; }
.dd-faq__item { background: #fff; border: 1px solid var(--dd-border); border-radius: 12px; overflow: hidden; }
.dd-faq__item summary { cursor: pointer; list-style: none; padding: 16px 18px; font-weight: 800; color: var(--dd-text); }
.dd-faq__item summary::-webkit-details-marker { display: none; }
.dd-faq__item p { padding: 0 18px 18px; font-size: 15px; }

.dd-related { max-width: 980px; margin: 38px auto 20px; }
.dd-related__all { margin-top: 15px; text-align: right; }
.dd-related__all a { font-weight: 800; text-decoration: none; }

.dd-tools-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.dd-tool-card {
  display: flex;
  min-height: 205px;
  flex-direction: column;
  padding: 22px;
  background: var(--dd-surface);
  border: 1px solid var(--dd-border);
  border-radius: 16px;
  text-decoration: none !important;
  color: var(--dd-text) !important;
  box-shadow: 0 6px 18px rgba(11, 24, 48, 0.04);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.dd-tool-card:hover { transform: translateY(-3px); border-color: #cfd9e5; box-shadow: 0 14px 30px rgba(11, 24, 48, 0.08); }
.dd-tool-card__badge { margin-bottom: 14px; color: var(--dd-blue); }
.dd-tool-card__title { font-size: 19px; line-height: 1.3; font-weight: 850; }
.dd-tool-card__desc { margin-top: 9px; color: var(--dd-muted); line-height: 1.55; font-size: 14px; }
.dd-tool-card__link { margin-top: auto; padding-top: 20px; font-weight: 800; }

.dd-section-heading { max-width: 720px; }
.dd-section-heading h2 { margin: 6px 0 8px; color: var(--dd-text); font-size: clamp(27px, 4vw, 38px); line-height: 1.15; }
.dd-section-heading p { margin: 0; color: var(--dd-muted); line-height: 1.7; }
.dd-section-heading--row { max-width: none; display: flex; justify-content: space-between; gap: 20px; align-items: end; }
.dd-section-heading--row > a { white-space: nowrap; font-weight: 800; text-decoration: none; }

.dd-directory { max-width: 1120px; margin: 0 auto; padding: 12px 0 40px; }
.dd-directory__intro { max-width: 760px; margin-bottom: 28px; }
.dd-directory__intro h2 { margin: 7px 0 10px; font-size: clamp(34px, 5vw, 54px); line-height: 1.05; color: var(--dd-text); }
.dd-directory__intro p { margin: 0; color: var(--dd-muted); font-size: 17px; line-height: 1.7; }

.dd-home { max-width: 1180px; margin: 0 auto; padding: 4px 18px 46px; color: var(--dd-text); }
.dd-hero { padding: clamp(34px, 6vw, 62px) 0 48px; }
.dd-hero__inner { max-width: 900px; }
.dd-hero h1 { max-width: 900px; margin: 8px 0 18px; color: var(--dd-text); font-size: clamp(42px, 7vw, 72px); line-height: .99; letter-spacing: -.04em; }
.dd-hero p { max-width: 760px; margin: 0; color: var(--dd-muted); font-size: clamp(17px, 2vw, 20px); line-height: 1.7; }
.dd-home-section { padding: 44px 0; border-top: 1px solid var(--dd-border); }

.dd-value-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.dd-value-card { padding: 26px; background: var(--dd-soft); border-radius: 16px; }
.dd-value-card > span { font-size: 12px; font-weight: 850; color: var(--dd-blue); }
.dd-value-card h3 { margin: 18px 0 8px; font-size: 22px; color: var(--dd-text); }
.dd-value-card p { margin: 0; color: var(--dd-muted); line-height: 1.65; }

.dd-post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.dd-post-card { overflow: hidden; border: 1px solid var(--dd-border); border-radius: 16px; background: #fff; }
.dd-post-card__image { display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--dd-soft); }
.dd-post-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .2s ease; }
.dd-post-card:hover img { transform: scale(1.025); }
.dd-post-card__body { padding: 20px; }
.dd-post-card__date { color: var(--dd-muted); font-size: 12px; font-weight: 700; }
.dd-post-card h3 { margin: 7px 0 9px; font-size: 19px; line-height: 1.35; }
.dd-post-card h3 a { color: var(--dd-text); text-decoration: none; }
.dd-post-card p { margin: 0 0 15px; color: var(--dd-muted); line-height: 1.6; font-size: 14px; }
.dd-post-card__read { font-weight: 800; text-decoration: none; }

.dd-home-cta { margin-top: 38px; padding: clamp(28px, 5vw, 48px); display: flex; align-items: center; justify-content: space-between; gap: 28px; background: #0b1830; border-radius: 20px; color: #fff; }
.dd-home-cta .dd-kicker { color: #75d2fb; }
.dd-home-cta h2 { max-width: 720px; margin: 7px 0 0; color: #fff; font-size: clamp(27px, 4vw, 42px); line-height: 1.15; }
.dd-home-cta .dd-btn--primary { background: #fff; color: #0b1830 !important; white-space: nowrap; }

@media (max-width: 900px) {
  .dd-tools-grid, .dd-post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .dd-tool__grid,
  .dd-tool__grid--engagement,
  .dd-tools-grid,
  .dd-post-grid,
  .dd-value-grid,
  .dd-result-stats { grid-template-columns: 1fr; }
  .dd-tool { margin: 16px 0; border-radius: 14px; }
  .dd-home { padding-left: 4px; padding-right: 4px; }
  .dd-hero { padding-top: 38px; }
  .dd-section-heading--row, .dd-home-cta { align-items: flex-start; flex-direction: column; }
  .dd-tool-card { min-height: 180px; }
}

/* v1.2 AdSense depth + planning UI */
.dd-tool__grid--adsense { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.dd-field small { font-weight: 600; color: var(--dd-muted); }
.dd-scenarios { margin-top: 16px; padding: 14px 16px; background: var(--dd-soft); border: 1px solid var(--dd-border); border-radius: 12px; }
.dd-scenarios__label { display: block; margin-bottom: 9px; font-size: 13px; font-weight: 800; color: var(--dd-text); }
.dd-scenarios__buttons { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.dd-chip { border: 1px solid #d5dce7; background: #fff; color: var(--dd-text); border-radius: 999px; padding: 7px 12px; font: inherit; font-size: 13px; font-weight: 800; cursor: pointer; }
.dd-chip:hover { border-color: var(--dd-blue); }
.dd-scenarios__note { color: var(--dd-muted); font-size: 12px; }
.dd-advanced { margin-top: 16px; border: 1px solid var(--dd-border); border-radius: 12px; background: #fff; overflow: hidden; }
.dd-advanced summary { cursor: pointer; padding: 15px 17px; font-weight: 800; color: var(--dd-text); }
.dd-advanced[open] summary { border-bottom: 1px solid var(--dd-border); }
.dd-advanced__intro { margin: 0; padding: 16px 17px 0; color: var(--dd-muted); font-size: 14px; line-height: 1.65; }
.dd-advanced .dd-tool__grid { padding: 16px 17px 18px; }
.dd-toc { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 0 0 34px; padding: 18px; background: var(--dd-soft); border: 1px solid var(--dd-border); border-radius: 14px; }
.dd-toc strong { width: 100%; color: var(--dd-text); }
.dd-toc a { font-size: 14px; font-weight: 700; text-decoration: none; }
.dd-table-wrap { overflow-x: auto; margin-top: 16px; border: 1px solid var(--dd-border); border-radius: 14px; }
.dd-data-table { width: 100%; min-width: 640px; border-collapse: collapse; background: #fff; }
.dd-data-table th, .dd-data-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--dd-border); }
.dd-data-table th { background: var(--dd-soft); color: var(--dd-text); font-size: 13px; }
.dd-data-table td { color: #48566a; }
.dd-data-table tr:last-child td { border-bottom: 0; }
.dd-metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 18px 0; }
.dd-metric-grid article { padding: 18px; border: 1px solid var(--dd-border); border-radius: 14px; background: #fff; }
.dd-metric-grid h3 { margin: 0 0 7px; color: var(--dd-text); font-size: 18px; }
.dd-metric-grid p { margin: 0; font-size: 14px; line-height: 1.65; }
.dd-guide__note, .dd-disclaimer { padding: 16px 18px; border-left: 4px solid var(--dd-blue); background: #f7fbff; color: #48566a; border-radius: 8px; line-height: 1.7; }
.dd-disclaimer { margin-top: 34px; font-size: 13px; }

@media (max-width: 760px) {
  .dd-tool__grid--adsense,
  .dd-metric-grid { grid-template-columns: 1fr; }
}

/* v1.3 directory search, topic hubs and richer calculators */
.dd-tool-finder {
  max-width: 720px;
  margin: 26px 0 14px;
}
.dd-tool-finder label {
  display: block;
  margin-bottom: 8px;
  color: var(--dd-text);
  font-size: 13px;
  font-weight: 850;
}
.dd-tool-finder input {
  width: 100%;
  min-height: 50px;
  padding: 0 16px;
  border: 1px solid var(--dd-border);
  border-radius: 13px;
  background: #fff;
  color: var(--dd-text);
  font: inherit;
  box-shadow: 0 4px 14px rgba(11,24,48,.03);
}
.dd-tool-finder input:focus {
  outline: none;
  border-color: var(--dd-blue);
  box-shadow: 0 0 0 3px rgba(27,164,230,.10);
}
.dd-tool-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 24px;
}
.dd-filter {
  border: 1px solid var(--dd-border);
  border-radius: 999px;
  background: #fff;
  color: var(--dd-text);
  padding: 9px 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}
.dd-filter:hover,
.dd-filter.is-active {
  border-color: var(--dd-blue);
  background: #f2faff;
  color: #087fb6;
}
.dd-no-results {
  padding: 22px;
  border: 1px dashed var(--dd-border);
  border-radius: 14px;
  color: var(--dd-muted);
  text-align: center;
}
.dd-topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.dd-topic-card {
  display: flex;
  min-height: 230px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--dd-border);
  border-radius: 17px;
  background: #fff;
  color: var(--dd-text) !important;
  text-decoration: none !important;
  box-shadow: 0 6px 18px rgba(11,24,48,.04);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.dd-topic-card:hover {
  transform: translateY(-3px);
  border-color: #cfd9e5;
  box-shadow: 0 14px 30px rgba(11,24,48,.08);
}
.dd-topic-card > span {
  color: var(--dd-blue);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.dd-topic-card h3 {
  margin: 16px 0 8px;
  color: var(--dd-text);
  font-size: 22px;
}
.dd-topic-card p {
  margin: 0;
  color: var(--dd-muted);
  line-height: 1.65;
}
.dd-topic-card strong {
  margin-top: auto;
  padding-top: 18px;
}
.dd-topic-hub {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 0 42px;
  color: var(--dd-text);
}
.dd-topic-hero {
  max-width: 820px;
  padding: 24px 0 34px;
}
.dd-topic-hero h2 {
  margin: 8px 0 12px;
  color: var(--dd-text);
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.05;
}
.dd-topic-hero p {
  margin: 0;
  color: var(--dd-muted);
  font-size: 17px;
  line-height: 1.75;
}
.dd-guide--metric .dd-guide__section {
  scroll-margin-top: 90px;
}
.dd-guide--metric .dd-table-wrap {
  margin-top: 18px;
}
.dd-guide--metric .dd-faq__item p {
  color: #48566a;
}

@media (max-width: 980px) {
  .dd-topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .dd-topic-grid { grid-template-columns: 1fr; }
  .dd-topic-card { min-height: 190px; }
  .dd-tool-filters { gap: 6px; }
  .dd-filter { padding: 8px 11px; }
}


/* v1.4: expanded utility tools */
.dd-field--wide { grid-column: 1 / -1; }
.dd-field textarea {
  width: 100%; min-height: 110px; resize: vertical; padding: 13px 14px;
  border: 1px solid var(--dd-border); border-radius: 11px; background: #fff;
  color: var(--dd-text); font: inherit; line-height: 1.5;
}
.dd-field textarea:focus { outline: none; border-color: var(--dd-blue); box-shadow: 0 0 0 3px rgba(27,164,230,.10); }
.dd-url-output { margin: 12px 0 0; overflow-wrap: anywhere; }
.dd-url-output a { font-weight: 800; text-decoration: none; }
.dd-serp-counters { display: flex; flex-wrap: wrap; gap: 12px 20px; margin: 14px 0 16px; color: var(--dd-muted); font-size: 13px; font-weight: 700; }
.dd-serp-preview { margin-top: 20px; padding: 22px; border: 1px solid var(--dd-border); border-radius: 14px; background: #fff; }
.dd-serp-preview__url { color: #202124; font-size: 13px; line-height: 1.4; overflow-wrap: anywhere; }
.dd-serp-preview__title { margin: 5px 0 4px; color: #1a0dab; font-family: Arial, sans-serif; font-size: 20px; line-height: 1.3; }
.dd-serp-preview__description { color: #4d5156; font-family: Arial, sans-serif; font-size: 14px; line-height: 1.55; }
.dd-result__value { overflow-wrap: anywhere; }
@media (max-width: 760px) { .dd-field--wide { grid-column: auto; } .dd-serp-preview { padding: 18px; } }


/* v1.5: tighter desktop rhythm, transparent methodology and internal guide links */
.dd-tool-meta {
  max-width: 980px;
  margin: 14px auto 26px;
  padding: 11px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--dd-muted);
  background: #fbfcfe;
  border: 1px solid var(--dd-border);
  border-radius: 11px;
  font-size: 13px;
  line-height: 1.5;
}
.dd-tool-meta strong { color: var(--dd-text); }
.dd-related-guides {
  max-width: 980px;
  margin: 38px auto 18px;
  padding-top: 34px;
  border-top: 1px solid var(--dd-border);
}
.dd-guide-link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}
.dd-guide-link-card {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--dd-border);
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(11, 24, 48, 0.035);
}
.dd-guide-link-card__date {
  color: var(--dd-muted);
  font-size: 12px;
  font-weight: 700;
}
.dd-guide-link-card h3 {
  margin: 7px 0 8px;
  color: var(--dd-text);
  font-size: 18px;
  line-height: 1.35;
}
.dd-guide-link-card h3 a { color: inherit; text-decoration: none; }
.dd-guide-link-card p {
  margin: 0;
  color: var(--dd-muted);
  font-size: 14px;
  line-height: 1.55;
}
.dd-guide-link-card__read {
  margin-top: auto;
  padding-top: 15px;
  font-weight: 800;
  text-decoration: none;
}
@media (min-width: 1000px) {
  .dd-tool__header { margin-bottom: 22px; }
  .dd-guide__section { margin-bottom: 28px; }
  .dd-toc { margin-bottom: 28px; }
}
@media (max-width: 760px) {
  .dd-tool-meta { margin: 10px 0 22px; }
  .dd-related-guides { margin-top: 30px; }
  .dd-guide-link-grid { grid-template-columns: 1fr; }
  .dd-hero { padding-top: 34px; padding-bottom: 42px; }
  .dd-home-section { padding: 38px 0; }
}