/* =========================================================
   Shared tool-page components (calculators, converters, etc.)
   ========================================================= */

.tool-page {
  max-width: 640px;
  margin: 60px auto 100px;
  padding: 44px clamp(20px, 6vw, 32px);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.breadcrumb b {
  color: var(--accent1-deep);
}

.breadcrumb a {
  color: inherit;
}

.breadcrumb a:hover {
  color: var(--accent1-deep);
  text-decoration: underline;
}

.tool-page h1 {
  font-size: 1.9rem;
  margin-bottom: 8px;
}

.tool-page .lede {
  color: var(--ink-soft);
  margin: 0 0 30px;
  font-size: 0.98rem;
}

.field-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.field {
  flex: 1;
  min-width: 120px;
}

.field-full {
  flex-basis: 100%;
}

.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 1rem;
  background-color: var(--bg);
  color: var(--ink);
}

.field select {
  height: 47px;
}

.field textarea {
  resize: vertical;
  min-height: 160px;
  line-height: 1.5;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--accent1);
  outline-offset: 1px;
}

.field-hint {
  display: block;
  font-size: 0.76rem;
  color: var(--ink-soft);
  margin-top: 6px;
}

.field input.invalid,
.field select.invalid,
.field textarea.invalid {
  border-color: var(--error);
}

.field input.invalid:focus,
.field select.invalid:focus,
.field textarea.invalid:focus {
  outline-color: var(--error);
}

.tip-presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.tip-preset {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--card);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.tip-preset:hover {
  border-color: var(--accent1);
}

.tip-preset.active {
  background-color: var(--accent1);
  color: var(--card);
  border-color: var(--accent1);
}

.field-validation-error {
  display: block;
  font-size: 0.76rem;
  color: var(--error);
  margin-top: 6px;
}

.validation-summary-errors {
  list-style: none;
  margin: 0 0 20px;
  padding: 12px 14px;
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
  color: var(--error);
  font-size: 0.88rem;
}

.validation-summary-errors ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.calc-btn {
  width: 100%;
  margin-top: 18px;
  margin-bottom: 28px;
}

.result {
  margin-top: 24px;
  background-color: var(--bg);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.result .headline {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.6rem;
  color: var(--accent1-deep);
  margin-bottom: 14px;
}

.result .headline .num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent2);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.result-grid div {
  min-width: 0;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.result-grid .n {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1rem, 5vw, 1.3rem);
  overflow-wrap: break-word;
}

.result-grid .n.n-text {
  font-family: var(--font-body);
  font-size: clamp(0.85rem, 4vw, 1rem);
}

.result-grid .l {
  font-size: 0.72rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  overflow-wrap: break-word;
}

.result .countdown {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.result .countdown b {
  color: var(--accent1-deep);
  font-family: var(--font-mono);
}

/* =========================================================
   Unit toggle (metric / imperial)
   ========================================================= */

.unit-toggle-group {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

.unit-hidden {
  display: none !important;
}

.field-imperial-row {
  display: flex;
  gap: 10px;
}

.field-imperial-row .field {
  flex: 1;
  min-width: 0;
}

/* =========================================================
   Tool content (explainer / formula / FAQ)
   ========================================================= */

.tool-content {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.tool-content h2 {
  font-size: 1.25rem;
  margin: 0 0 12px;
}

.tool-content h2:not(:first-child) {
  margin-top: 32px;
}

.tool-content p {
  color: var(--ink-soft);
  line-height: 1.65;
  margin: 0 0 12px;
  font-size: 0.94rem;
}

.tool-content .formula {
  font-family: var(--font-mono);
  background-color: var(--bg);
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.9rem;
  margin: 0 0 16px;
  color: var(--ink);
}

.tool-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 0.9rem;
}

.tool-content table caption {
  caption-side: top;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.tool-content th,
.tool-content td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--line);
}

.tool-content th {
  background-color: var(--bg);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.faq-item {
  margin-bottom: 18px;
}

.faq-item h3 {
  font-size: 0.98rem;
  margin: 0 0 6px;
  color: var(--ink);
}

.faq-item p {
  margin: 0;
}

/* =========================================================
   GPA calculator
   ========================================================= */

.gpa-table-wrap {
  overflow-x: auto;
  margin-bottom: 14px;
}

.gpa-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
}

.gpa-table th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  padding: 0 8px 8px;
}

.gpa-table td {
  padding: 4px 8px 4px 0;
}

.gpa-table input,
.gpa-table select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  background-color: var(--bg);
  color: var(--ink);
}

.gpa-table td:first-child {
  min-width: 160px;
}

.gpa-table td:nth-child(2) {
  min-width: 90px;
}

.gpa-table td:nth-child(3) {
  min-width: 90px;
}

/* =========================================================
   Related tools
   ========================================================= */

.related-tools {
  max-width: 640px;
  margin: 0 auto 100px;
  padding: 28px clamp(20px, 6vw, 32px);
}

.related-tools h2 {
  font-size: 1.1rem;
  margin: 0 0 14px;
}

.related-tools-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.related-tool-link {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--card);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 600;
}

.related-tool-link:hover {
  border-color: var(--accent1);
  color: var(--accent1-deep);
}

/* =========================================================
   Password generator
   ========================================================= */

.pw-output-row {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
}

.pw-output-row input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  background-color: var(--bg);
  color: var(--ink);
}

.btn-secondary {
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--card);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: var(--accent1);
}

.pw-strength {
  min-height: 1.2em;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pw-strength.weak { color: var(--error); }
.pw-strength.fair { color: var(--accent1-deep); }
.pw-strength.strong { color: var(--accent1); }
.pw-strength.very-strong { color: var(--accent2); }

.pw-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.pw-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
}

.pw-checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent1);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent1);
}

/* =========================================================
   Random number generator
   ========================================================= */

.rng-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.rng-chip {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--card);
  color: var(--accent1-deep);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.88rem;
}