/*
=========================================================
niDar Tools
Construction Cost Estimator
Green / Mint Digital Calculator UI
=========================================================
*/

:root {
  --primary: #2e7d32;
  --primary-dark: #1b5e20;
  --primary-light: #43a047;
  --primary-soft: #e8f5e9;

  --page-bg: #f7faf8;
  --card-bg: #ffffff;
  --soft-bg: #f1f6f2;

  --text: #18201a;
  --text-secondary: #5f6962;
  --text-muted: #7b847d;

  --border: #dfe7e1;
  --border-strong: #cbd8ce;

  --warning: #b7791f;
  --warning-bg: #fff8e7;
  --danger: #c62828;
  --danger-bg: #fff1f1;

  --shadow-sm: 0 4px 16px rgba(24, 32, 26, 0.055);
  --shadow-md: 0 10px 28px rgba(24, 32, 26, 0.09);
  --shadow-lg: 0 18px 50px rgba(24, 32, 26, 0.10);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;

  --transition: 180ms ease;
  --max-width: 1180px;
}

/* =========================================================
   RESET
========================================================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

.hidden {
  display: none !important;
}

/* =========================================================
   MAIN PAGE
========================================================= */

.tool-page {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 46px 0 80px;
}

/* =========================================================
   HERO
========================================================= */

.tool-hero {
  position: relative;
  max-width: 900px;
  margin: 0 auto 38px;
  padding: 24px 16px 12px;
  text-align: center;
}

.tool-hero::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  top: -75px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(
    circle,
    rgba(76, 175, 80, 0.16),
    transparent 68%
  );
  pointer-events: none;
  z-index: -1;
}

.tool-hero-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  border: 1px solid rgba(46, 125, 50, 0.15);
  border-radius: 18px;
  background: var(--primary-soft);
  box-shadow: var(--shadow-sm);
  font-size: 31px;
}

.tool-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 14px;
  border: 1px solid rgba(46, 125, 50, 0.18);
  border-radius: 999px;
  background: rgba(232, 245, 233, 0.86);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.25px;
  text-transform: uppercase;
}

.tool-hero h1 {
  margin: 17px 0 12px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -1.5px;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    #18201a 0%,
    #2e7d32 55%,
    #43a047 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tool-hero p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: clamp(15px, 2vw, 18px);
}

.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 750;
  text-decoration: none;
  transition:
    transform var(--transition),
    color var(--transition);
}

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

/* =========================================================
   HERO FEATURE PILLS
========================================================= */

.tool-hero-content::after {
  content: "⚡ Instant Estimate   •   📱 Mobile Friendly   •   🔒 Private   •   🆓 Free";
  display: block;
  width: fit-content;
  max-width: 100%;
  margin: 22px auto 0;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

/* =========================================================
   IMPORTANT NOTE
========================================================= */

.info-card.warning-card {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  max-width: 980px;
  margin: 0 auto 22px;
  padding: 20px 22px;
  border: 1px solid rgba(183, 121, 31, 0.22);
  border-radius: var(--radius-lg);
  background: var(--warning-bg);
  box-shadow: var(--shadow-sm);
}

.warning-card .info-icon {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  border-radius: 13px;
  background: #fff0c7;
  font-size: 20px;
}

.warning-card .info-content {
  min-width: 0;
}

.warning-card h2 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 800;
}

.warning-card p {
  margin: 0 0 5px;
  color: var(--text-secondary);
  font-size: 13px;
}

.warning-card p:last-child {
  margin-bottom: 0;
}

/* =========================================================
   TOOL CARDS
========================================================= */

.tool-card {
  max-width: 980px;
  margin: 22px auto 0;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.tool-card:hover {
  border-color: rgba(46, 125, 50, 0.20);
  box-shadow: var(--shadow-md);
}

/* =========================================================
   SECTION HEADING
========================================================= */

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 25px;
}

.section-number {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--primary-light)
  );
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(46, 125, 50, 0.22);
}

.section-heading h2 {
  margin: 0 0 3px;
  font-size: clamp(20px, 3vw, 25px);
  line-height: 1.25;
  font-weight: 800;
}

.section-heading p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

/* =========================================================
   FORM GROUP TITLES
========================================================= */

.form-group-title {
  margin: 25px 0 12px;
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.15px;
}

.form-group-title:first-of-type {
  margin-top: 0;
}

/* =========================================================
   INPUT GRID
========================================================= */

.input-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}

.input-grid.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.input-field {
  min-width: 0;
}

.input-field label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 750;
}

.input-field label span {
  color: var(--text-muted);
  font-weight: 650;
}

.input-field input,
.input-field select {
  width: 100%;
  min-height: 50px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  outline: none;
  background: #fff;
  color: var(--text);
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.input-field input:hover,
.input-field select:hover {
  border-color: rgba(46, 125, 50, 0.42);
}

.input-field input:focus,
.input-field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(46, 125, 50, 0.10);
}

.input-field input::placeholder {
  color: #a0aaa2;
}

.input-field input:disabled,
.input-field select:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  background: var(--soft-bg);
}

/* =========================================================
   BUTTONS
========================================================= */

.primary-button,
.secondary-button {
  min-height: 48px;
  padding: 11px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 800;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition),
    border-color var(--transition);
}

.primary-button {
  border: 1px solid var(--primary);
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--primary-light)
  );
  color: #fff;
  box-shadow: 0 8px 18px rgba(46, 125, 50, 0.20);
}

.primary-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(46, 125, 50, 0.27);
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(0);
}

.primary-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.secondary-button {
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
}

.secondary-button:hover {
  border-color: rgba(46, 125, 50, 0.45);
  background: var(--primary-soft);
  color: var(--primary-dark);
}

/* =========================================================
   ERROR / MESSAGE
========================================================= */

.message-box {
  margin-top: 15px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 13px;
}

.error-message {
  border: 1px solid rgba(198, 40, 40, 0.18);
  background: var(--danger-bg);
  color: var(--danger);
}

/* =========================================================
   QUANTITY RESULT
========================================================= */

.result-panel {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid rgba(46, 125, 50, 0.20);
  border-radius: var(--radius-md);
  background: linear-gradient(
    180deg,
    #f4fbf5,
    #fff
  );
  animation: resultIn 220ms ease;
}

@keyframes resultIn {
  from {
    opacity: 0;
    transform: translateY(5px);
  }

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

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.result-label {
  display: block;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.65px;
  text-transform: uppercase;
}

.result-header h3 {
  margin: 3px 0 0;
  font-size: 18px;
  font-weight: 800;
}

.result-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--primary-soft);
  font-size: 18px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.result-stat {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: #fff;
}

.result-stat span {
  display: block;
  margin-bottom: 5px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
}

.result-stat strong {
  display: block;
  color: var(--primary-dark);
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.15;
  font-weight: 850;
}

/* =========================================================
   TOTAL RESULT
========================================================= */

.total-result-card {
  max-width: 980px;
  margin: 22px auto 0;
  padding: 28px;
  border: 1px solid rgba(46, 125, 50, 0.22);
  border-radius: var(--radius-xl);
  background: linear-gradient(
    180deg,
    #eef8f0 0%,
    #fff 68%
  );
  box-shadow: var(--shadow-md);
  animation: resultIn 220ms ease;
}

.total-result-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.total-result-header .result-label {
  margin-bottom: 5px;
}

.total-result-header h2 {
  margin: 0;
  font-size: clamp(21px, 3vw, 29px);
  font-weight: 850;
}

.total-icon {
  flex: 0 0 50px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  background: var(--primary-soft);
  font-size: 23px;
}

.cost-table-wrapper {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #fff;
}

.cost-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.cost-table th,
.cost-table td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.cost-table th {
  background: var(--soft-bg);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 800;
}

.cost-table td {
  color: var(--text);
  font-size: 13px;
}

.cost-table tr:last-child td {
  border-bottom: 0;
}

.grand-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: 15px;
  background: var(--primary);
  color: #fff;
}

.grand-total span {
  font-size: 13px;
  font-weight: 750;
}

.grand-total strong {
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.1;
  font-weight: 900;
}

/* =========================================================
   INFORMATION
========================================================= */

.information-card,
.disclaimer-card {
  max-width: 980px;
  margin: 42px auto 0;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
}

.information-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.information-icon {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 13px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 19px;
}

.information-header h2 {
  margin: 0;
  font-size: clamp(20px, 3vw, 25px);
  font-weight: 800;
}

.guide-list {
  margin: 0;
  padding-left: 22px;
}

.guide-list li {
  margin-bottom: 11px;
  color: var(--text-secondary);
  font-size: 14px;
}

.guide-list li:last-child {
  margin-bottom: 0;
}

.formula-list {
  display: grid;
  gap: 12px;
}

.formula-item {
  padding: 15px 17px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--soft-bg);
}

.formula-item strong {
  display: block;
  margin-bottom: 4px;
  color: var(--primary-dark);
  font-size: 14px;
}

.formula-item p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
}

/* =========================================================
   DISCLAIMER
========================================================= */

.disclaimer-card {
  border-color: rgba(183, 121, 31, 0.18);
  background: #fffaf0;
}

.disclaimer-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
}

/* =========================================================
   DARK MODE
========================================================= */

html[data-theme="dark"] body {
  --page-bg: #0d130f;
  --card-bg: #151d17;
  --soft-bg: #19231b;

  --text: #eef5ef;
  --text-secondary: #b7c2b9;
  --text-muted: #8e9b91;

  --border: #29372d;
  --border-strong: #3a4a3e;

  background: var(--page-bg);
  color: var(--text);
}

html[data-theme="dark"] .tool-hero::before {
  background: radial-gradient(
    circle,
    rgba(76, 175, 80, 0.18),
    transparent 68%
  );
}

html[data-theme="dark"] .tool-hero h1 {
  background: linear-gradient(
    135deg,
    #eef5ef 0%,
    #81c784 58%,
    #a5d6a7 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
}

html[data-theme="dark"] .tool-badge,
html[data-theme="dark"] .tool-hero-content::after {
  background: rgba(30, 55, 34, 0.9);
  border-color: #314c36;
  color: #b9e0bd;
}

html[data-theme="dark"] .tool-card,
html[data-theme="dark"] .information-card,
html[data-theme="dark"] .disclaimer-card,
html[data-theme="dark"] .total-result-card {
  background: var(--card-bg);
}

html[data-theme="dark"] .input-field input,
html[data-theme="dark"] .input-field select,
html[data-theme="dark"] .secondary-button,
html[data-theme="dark"] .result-stat,
html[data-theme="dark"] .cost-table-wrapper {
  background: #111812;
  color: var(--text);
}

html[data-theme="dark"] .result-panel {
  background: linear-gradient(
    180deg,
    #17241a,
    #111812
  );
}

html[data-theme="dark"] .total-result-card {
  background: linear-gradient(
    180deg,
    #16261a,
    #151d17
  );
}

html[data-theme="dark"] .cost-table th {
  background: #1a271d;
}

html[data-theme="dark"] .disclaimer-card {
  background: #241f14;
}

html[data-theme="dark"] .info-card.warning-card {
  background: #282014;
}

html[data-theme="dark"] .grand-total {
  background: linear-gradient(
    135deg,
    #2e7d32,
    #43a047
  );
}

/* =========================================================
   SENIOR / HIGH READABILITY
========================================================= */

html[data-theme="senior"] body {
  font-size: 17px;
}

html[data-theme="senior"] .tool-page {
  width: min(1180px, calc(100% - 24px));
}

html[data-theme="senior"] .tool-hero h1 {
  font-size: clamp(35px, 6vw, 56px);
  letter-spacing: -0.5px;
}

html[data-theme="senior"] .tool-hero p,
html[data-theme="senior"] .section-heading p,
html[data-theme="senior"] .warning-card p,
html[data-theme="senior"] .guide-list li {
  font-size: 16px;
}

html[data-theme="senior"] .input-field label {
  font-size: 15px;
}

html[data-theme="senior"] .input-field input,
html[data-theme="senior"] .input-field select {
  min-height: 56px;
  font-size: 17px;
}

html[data-theme="senior"] .primary-button,
html[data-theme="senior"] .secondary-button {
  min-height: 54px;
  font-size: 16px;
}

/* =========================================================
   TABLET
========================================================= */

@media (max-width: 900px) {
  .tool-page {
    width: min(100% - 24px, 760px);
    padding-top: 34px;
  }

  .input-grid,
  .input-grid.two-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tool-card,
  .information-card,
  .disclaimer-card,
  .total-result-card {
    padding: 22px;
  }
}

/* =========================================================
   MOBILE
========================================================= */

@media (max-width: 600px) {
  .tool-page {
    width: min(100% - 20px, 520px);
    padding: 28px 0 56px;
  }

  .tool-hero {
    margin-bottom: 27px;
    padding: 18px 6px 8px;
  }

  .tool-hero-icon {
    width: 56px;
    height: 56px;
    font-size: 27px;
  }

  .tool-badge {
    padding: 6px 11px;
    font-size: 11px;
  }

  .tool-hero h1 {
    margin-top: 13px;
    font-size: clamp(29px, 9vw, 40px);
    letter-spacing: -1px;
  }

  .tool-hero p {
    font-size: 14px;
  }

  .tool-hero-content::after {
    margin-top: 17px;
    border-radius: 15px;
    padding: 8px 10px;
    font-size: 10px;
    line-height: 1.65;
  }

  .info-card.warning-card {
    gap: 11px;
    padding: 16px;
    border-radius: 16px;
  }

  .warning-card .info-icon {
    flex-basis: 36px;
    width: 36px;
    height: 36px;
    font-size: 17px;
  }

  .warning-card h2 {
    font-size: 16px;
  }

  .warning-card p {
    font-size: 12px;
  }

  .tool-card {
    margin-top: 16px;
    padding: 18px;
    border-radius: 18px;
  }

  .section-heading {
    gap: 11px;
    margin-bottom: 21px;
  }

  .section-number {
    flex-basis: 38px;
    width: 38px;
    height: 38px;
    font-size: 15px;
  }

  .section-heading h2 {
    font-size: 20px;
  }

  .section-heading p {
    font-size: 12px;
  }

  .form-group-title {
    margin-top: 21px;
    font-size: 12px;
  }

  .input-grid,
  .input-grid.two-columns {
    grid-template-columns: 1fr;
    gap: 13px;
    margin-bottom: 17px;
  }

  .input-field label {
    margin-bottom: 6px;
    font-size: 12px;
  }

  .input-field input,
  .input-field select {
    min-height: 48px;
    font-size: 14px;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
    min-height: 48px;
  }

  .result-panel {
    padding: 16px;
  }

  .result-grid {
    grid-template-columns: 1fr 1fr;
    gap: 9px;
  }

  .result-stat {
    padding: 12px;
  }

  .result-stat strong {
    font-size: 20px;
  }

  .total-result-card {
    margin-top: 16px;
    padding: 18px;
    border-radius: 20px;
  }

  .total-result-header {
    gap: 10px;
  }

  .total-result-header h2 {
    font-size: 21px;
  }

  .total-icon {
    flex-basis: 43px;
    width: 43px;
    height: 43px;
    font-size: 20px;
  }

  .grand-total {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
    padding: 16px;
  }

  .grand-total strong {
    font-size: 29px;
  }

  .information-card,
  .disclaimer-card {
    margin-top: 28px;
    padding: 19px;
    border-radius: 18px;
  }

  .information-header {
    gap: 10px;
    margin-bottom: 16px;
  }

  .information-icon {
    flex-basis: 38px;
    width: 38px;
    height: 38px;
  }

  .information-header h2 {
    font-size: 20px;
  }

  .guide-list {
    padding-left: 20px;
  }

  .guide-list li {
    font-size: 13px;
    margin-bottom: 9px;
  }

  .formula-item {
    padding: 13px;
  }
}

/* =========================================================
   SMALL PHONES
========================================================= */

@media (max-width: 380px) {
  .tool-page {
    width: min(100% - 16px, 360px);
  }

  .tool-card {
    padding: 15px;
  }

  .section-heading h2 {
    font-size: 18px;
  }

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

  .tool-hero-content::after {
    font-size: 9px;
  }
}

/* =========================================================
   REDUCED MOTION
========================================================= */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}