/* =====================================================
   AgroNozzle — Seletor de Pontas de Pulverização
   CSS Principal — Design Profissional Responsivo
   ===================================================== */

:root {
  --green-dark:   #1a5c2e;
  --green-main:   #2d8a47;
  --green-light:  #4caf65;
  --green-pale:   #e8f5ec;
  --green-border: #b2dfbb;

  --amber:        #f59e0b;
  --amber-light:  #fef3c7;
  --red-soft:     #ef4444;
  --red-light:    #fee2e2;
  --blue-soft:    #3b82f6;
  --blue-light:   #eff6ff;

  --text-dark:    #111827;
  --text-mid:     #374151;
  --text-muted:   #6b7280;
  --text-light:   #9ca3af;

  --bg-main:      #f0f4f1;
  --bg-card:      #ffffff;
  --border:       #e5e7eb;
  --border-light: #f3f4f6;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:  0 4px 12px rgba(0,0,0,.09), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.07);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

/* RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-main);
  color: var(--text-dark);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== HEADER ===== */
.header {
  background: linear-gradient(135deg, var(--green-dark) 0%, var(--green-main) 60%, #3da659 100%);
  color: #fff;
  padding: 0;
  box-shadow: 0 4px 20px rgba(26,92,46,.35);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-icon {
  width: 46px;
  height: 46px;
  background: rgba(255,255,255,.18);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.header-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.3px;
  line-height: 1.2;
}

.header-sub {
  font-size: 11px;
  opacity: .82;
  font-weight: 400;
  letter-spacing: .2px;
}

.header-badge {
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== MAIN CONTAINER ===== */
.main-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* ===== INTRO CARD ===== */
.intro-card {
  background: linear-gradient(135deg, #edf7f0, #d4edd9);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}

.intro-icon {
  width: 52px;
  height: 52px;
  background: var(--green-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  flex-shrink: 0;
}

.intro-text h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 4px;
}

.intro-text p {
  font-size: 13.5px;
  color: #3a6645;
  line-height: 1.5;
}

/* ===== FORM CARD ===== */
.form-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: 20px;
}

.form-card-header {
  background: linear-gradient(90deg, var(--green-dark), var(--green-main));
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-card-header i { font-size: 18px; }
.form-card-header h3 { font-size: 16px; font-weight: 600; }

form { padding: 24px; }

/* ===== FORM GRID ===== */
.form-grid {
  display: grid;
  gap: 18px;
  margin-bottom: 18px;
}

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

/* ===== FORM GROUP ===== */
.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-mid);
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-group label i { color: var(--green-main); width: 14px; }

.required {
  color: var(--red-soft);
  font-weight: 700;
  margin-left: 2px;
}

.form-group select,
.form-group input[type="number"] {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-dark);
  background: #fff;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24'%3E%3Cpath fill='%236b7280' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 36px;
}

.form-group select:focus,
.form-group input[type="number"]:focus {
  border-color: var(--green-main);
  box-shadow: 0 0 0 3px rgba(45,138,71,.12);
}

.form-group select.error,
.form-group input.error {
  border-color: var(--red-soft);
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}

.input-with-unit {
  position: relative;
}

.input-with-unit input {
  padding-right: 52px;
}

.unit {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--border-light);
  padding: 2px 6px;
  border-radius: 4px;
  pointer-events: none;
}

.range-hint {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 1px;
}

.field-hint {
  font-size: 12px;
  color: var(--green-dark);
  background: var(--green-pale);
  border-radius: 6px;
  padding: 6px 10px;
  display: none;
  border-left: 3px solid var(--green-main);
}

.field-hint.visible { display: block; }

/* ===== ADVANCED SECTION ===== */
.advanced-section {
  margin-bottom: 24px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.toggle-advanced {
  width: 100%;
  background: var(--border-light);
  border: none;
  padding: 12px 18px;
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-mid);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  text-align: left;
  transition: background .2s;
}

.toggle-advanced:hover { background: #e8eaec; }
.toggle-advanced i:first-child { color: var(--green-main); }
.toggle-advanced #advancedChevron { margin-left: auto; transition: transform .3s; }
.toggle-advanced.open #advancedChevron { transform: rotate(180deg); }

.advanced-fields {
  display: none;
  padding: 20px 18px 10px;
  border-top: 1px solid var(--border);
  background: #fafbfc;
}

.advanced-fields.visible { display: block; }

/* ===== FORM ACTIONS ===== */
.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 8px;
}

.btn-reset {
  background: transparent;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all .2s;
}

.btn-reset:hover { border-color: var(--text-muted); color: var(--text-mid); }

.btn-primary {
  background: linear-gradient(135deg, var(--green-main), var(--green-dark));
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 15px rgba(45,138,71,.35);
  transition: all .2s;
  letter-spacing: .2px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45,138,71,.45);
}

.btn-primary:active { transform: translateY(0); }

/* ===== CALC DISPLAY ===== */
.calc-display {
  background: linear-gradient(135deg, #1a3d2b, #2a5c3f);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin-bottom: 24px;
  color: #fff;
}

.calc-title {
  font-size: 13px;
  font-weight: 600;
  opacity: .8;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 7px;
}

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

.calc-item {
  background: rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  text-align: center;
}

.calc-item.highlight {
  background: rgba(76,175,101,.35);
  border: 1px solid rgba(76,175,101,.5);
}

.calc-label {
  font-size: 10.5px;
  opacity: .75;
  margin-bottom: 4px;
  display: block;
}

.calc-value {
  font-size: 16px;
  font-weight: 700;
  display: block;
}

.calc-item.highlight .calc-value { font-size: 20px; color: #7fffab; }

/* ===== RESULTS ===== */
.result-header-block {
  text-align: center;
  margin-bottom: 22px;
  padding-top: 4px;
}

.result-header-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, var(--green-main), var(--green-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  margin: 0 auto 12px;
  box-shadow: 0 4px 15px rgba(45,138,71,.35);
}

.result-header-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--green-dark);
  margin-bottom: 6px;
}

.result-header-sub {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

/* ===== PRIMARY CARD ===== */
.recommendation-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 22px;
}

.primary-card {
  border: 2px solid var(--green-main);
  box-shadow: 0 8px 35px rgba(45,138,71,.2), var(--shadow-lg);
}

.rec-card-top {
  background: linear-gradient(135deg, var(--green-dark), #2a7040);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rec-badge {
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .8px;
  padding: 4px 12px;
  border-radius: 20px;
}

.rec-score {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,.9);
  background: rgba(255,255,255,.12);
  padding: 4px 12px;
  border-radius: 20px;
}

.rec-card-body { padding: 22px; }

.rec-main-info {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.rec-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-muted);
  margin-bottom: 5px;
}

.rec-value.large {
  font-size: 20px;
  font-weight: 800;
  color: var(--green-dark);
  line-height: 1.2;
}

/* Droplet size pill */
.rec-droplet {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 30px;
  border: 2px solid currentColor;
}

.rec-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}

.rec-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--border-light);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.rec-detail-item > i {
  color: var(--green-main);
  font-size: 15px;
  margin-top: 2px;
  flex-shrink: 0;
}

.rec-detail-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 3px;
}

.rec-detail-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.4;
}

.rec-why {
  background: linear-gradient(135deg, var(--green-pale), #d4edd9);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.rec-why > i { color: var(--green-main); font-size: 16px; margin-top: 1px; flex-shrink: 0; }
.rec-why strong { font-size: 13px; color: var(--green-dark); display: block; margin-bottom: 4px; }
.rec-why p { font-size: 13.5px; color: #3a6645; line-height: 1.55; margin: 0; }

/* ===== ALTERNATIVES ===== */
.alternatives-section { margin-bottom: 22px; }

.alt-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alt-title i { color: var(--green-main); }

.alternatives-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.alt-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: all .2s;
  position: relative;
  overflow: hidden;
}

.alt-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: var(--green-light);
}

.alt-card:hover {
  border-color: var(--green-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.alt-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.alt-number {
  width: 22px;
  height: 22px;
  background: var(--green-main);
  color: #fff;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.alt-type {
  font-size: 15px;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 4px;
}

.alt-model {
  font-size: 13px;
  color: var(--text-mid);
  margin-bottom: 8px;
}

.alt-droplet {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.alt-brands {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.alt-brands i { color: var(--green-light); font-size: 11px; }

.alt-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-light);
  font-style: italic;
}

/* ===== DROPLET COLOR CLASSES ===== */
.drop-xf  { background: #fce4ec; color: #b71c1c; border-color: #ef9a9a; }
.drop-mf  { background: #fce4ec; color: #c62828; border-color: #ef9a9a; }
.drop-f   { background: #fff3e0; color: #e65100; border-color: #ffcc80; }
.drop-m   { background: #fff8e1; color: #f57f17; border-color: #ffe082; }
.drop-g   { background: #e8f5e9; color: #1b5e20; border-color: #a5d6a7; }
.drop-mg  { background: #e3f2fd; color: #0d47a1; border-color: #90caf9; }
.drop-eg  { background: #ede7f6; color: #4527a0; border-color: #b39ddb; }
.drop-ug  { background: #263238; color: #eceff1; border-color: #546e7a; }

/* ===== TIPS CARD ===== */
.tips-card {
  background: linear-gradient(135deg, #fffbeb, #fef3c7);
  border: 1.5px solid #fcd34d;
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 22px;
}

.tips-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.tips-header i { color: var(--amber); font-size: 20px; }
.tips-header h3 { font-size: 15px; font-weight: 700; color: #92400e; }

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tips-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 13.5px;
  color: #78350f;
  line-height: 1.5;
}

.tips-list li::before {
  content: '\f058';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--amber);
  font-size: 13px;
  margin-top: 2px;
  flex-shrink: 0;
}

/* ===== LEGEND CARD ===== */
.legend-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px 24px;
  margin-bottom: 22px;
  border: 1.5px solid var(--border);
}

.legend-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.legend-header i { color: var(--green-main); font-size: 18px; }
.legend-header h3 { font-size: 14px; font-weight: 700; color: var(--text-mid); }

.legend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--border-light);
  transition: background .2s;
}

.legend-item:hover { background: var(--green-pale); }

.legend-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid transparent;
}

.legend-dot.xf, .legend-dot.mf { background: #ef5350; border-color: #c62828; }
.legend-dot.f  { background: #ff9800; border-color: #e65100; }
.legend-dot.m  { background: #ffc107; border-color: #f57f17; }
.legend-dot.g  { background: #4caf50; border-color: #1b5e20; }
.legend-dot.mg { background: #2196f3; border-color: #0d47a1; }
.legend-dot.eg { background: #9c27b0; border-color: #4527a0; }
.legend-dot.ug { background: #37474f; border-color: #263238; }

.legend-name {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1px;
}

.legend-desc { font-size: 11px; color: var(--text-muted); }

/* ===== NEW SEARCH BAR ===== */
.new-search-bar {
  text-align: center;
  padding: 8px 0 20px;
}

.btn-new-search {
  background: var(--bg-card);
  border: 2px solid var(--green-main);
  border-radius: var(--radius-sm);
  padding: 12px 30px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  color: var(--green-main);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  transition: all .2s;
  box-shadow: var(--shadow-sm);
}

.btn-new-search:hover {
  background: var(--green-main);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--green-dark);
  color: rgba(255,255,255,.75);
  padding: 20px;
  text-align: center;
}

.footer-inner { max-width: 900px; margin: 0 auto; }
.footer p { font-size: 13px; margin-bottom: 6px; }
.footer-disclaimer { font-size: 11.5px; opacity: .65; max-width: 600px; margin: 0 auto; }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-header-block,
.recommendation-card,
.alternatives-section,
.tips-card,
.legend-card,
.calc-display {
  animation: fadeInUp .4s ease both;
}

.calc-display { animation-delay: .05s; }
.result-header-block { animation-delay: .05s; }
.recommendation-card { animation-delay: .1s; }
.alternatives-section { animation-delay: .2s; }
.tips-card { animation-delay: .3s; }
.legend-card { animation-delay: .4s; }

/* ===== BRAND PILLS ===== */
.brands-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.brand-pill {
  background: var(--green-pale);
  border: 1px solid var(--green-border);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--green-dark);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.brand-pill i { color: var(--green-main); font-size: 10px; }
.brand-pill em { font-style: normal; font-weight: 700; }

/* ===== VALIDATION ERROR ===== */
.error-msg {
  font-size: 12px;
  color: var(--red-soft);
  margin-top: 3px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 680px) {
  .header-badge { display: none; }

  .header-inner { padding: 12px 16px; }

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

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

  .rec-details-grid { grid-template-columns: 1fr; }

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

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

  .form-actions { flex-direction: column; }

  .btn-primary, .btn-reset { justify-content: center; }

  .rec-main-info { flex-direction: column; gap: 16px; }

  .main-container { padding: 16px 12px 32px; }

  form { padding: 16px; }

  .intro-card { flex-direction: column; text-align: center; }

  .header-title { font-size: 18px; }
}

@media (max-width: 400px) {
  .calc-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .calc-value { font-size: 14px; }
  .calc-item.highlight .calc-value { font-size: 17px; }
}

/* ===== PULSE ANIMATION for primary card ===== */
@keyframes pulseGreen {
  0%, 100% { box-shadow: 0 8px 35px rgba(45,138,71,.2), var(--shadow-lg); }
  50%       { box-shadow: 0 8px 40px rgba(45,138,71,.35), 0 0 0 6px rgba(45,138,71,.08); }
}

.primary-card { animation: pulseGreen 3s ease-in-out infinite, fadeInUp .4s ease both; }
.primary-card:hover { animation: fadeInUp .4s ease both; }