/* ============================================================
   ÍNDICE SARDINHA — styles.css
   Autor: Saulo Ferro Maciel · Maio 2026
   ============================================================ */

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

:root {
  --green:        #2DD4A0;
  --green-light:  rgba(45,212,160,0.15);
  --green-mid:    #1AB389;
  --green-dark:   #0E7A5E;
  --amber:        #F0A030;
  --amber-light:  rgba(240,160,48,0.15);
  --amber-dark:   #C47820;
  --gray-bg:      #1C1828;
  --gray-card:    #251F34;
  --gray-border:  rgba(255, 255, 255, 0.08);
  --gray-muted:   #9B96B0;
  --text-primary: #E8E4F4;
  --text-second:  #C4BDD8;
  --text-hint:    #9B96B0;
  --red-err:      #FF7070;
  --radius-sm:    6px;
  --radius-md:    10px;
  --radius-lg:    14px;
  --radius-xl:    20px;
  --shadow-card:  0 4px 16px rgba(0,0,0,0.35), 0 1px 4px rgba(0,0,0,0.25);
  --font-sans:    'Space Grotesk', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Cascadia Code', 'Courier New', monospace;
  --transition:   0.18s ease;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, #1A1730 0%, #1C1828 45%, #1F1530 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  text-transform: uppercase;
}

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--gray-border);
  background: rgba(26, 23, 48, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 2rem 0 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-second);
  margin-bottom: .5rem;
}

.site-title {
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1;
  color: #F0EDF8;
}

.site-title .accent {
  color: var(--green);
}

.site-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-second);
  margin-top: .6rem;
}

/* ---------- Section labels ---------- */
.section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--text-second);
  margin: 1.75rem 0 .65rem;
  display: flex;
  align-items: center;
  gap: 7px;
}

.section-label::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--amber);
  flex-shrink: 0;
}

/* ---------- Calculator Grid ---------- */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

@media (max-width: 540px) {
  .calc-grid { grid-template-columns: 1fr; }
}

/* ---------- Cards ---------- */
.card {
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

.tag-teal  { background: var(--green-light); color: var(--green); font-weight: 700; }
.tag-amber { background: var(--amber-light); color: var(--amber); font-weight: 700; }

/* ---------- Field ---------- */
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-second);
  letter-spacing: .06em;
  margin-bottom: 6px;
}

.input-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 0 12px;
  background: rgba(255,255,255,0.05);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-wrap:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(45,212,160,.15);
  background: rgba(255,255,255,0.08);
}

.currency {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-second);
  flex-shrink: 0;
  user-select: none;
}

.input-wrap input {
  border: none;
  background: transparent;
  outline: none;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: #F0EDF8;
  width: 100%;
  padding: 10px 0;
  min-width: 0;
}

.input-wrap input::-webkit-inner-spin-button,
.input-wrap input::-webkit-outer-spin-button { -webkit-appearance: none; }
.input-wrap input[type=number] { -moz-appearance: textfield; }

.field-hint {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-second);
  margin-top: 7px;
  min-height: 14px;
}

.field-err {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--red-err);
  margin-top: 4px;
  min-height: 14px;
}

/* ---------- Result Card ---------- */
.result-card {
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  text-align: center;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.result-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-second);
  margin-bottom: .5rem;
}

.result-big {
  font-size: clamp(3.5rem, 12vw, 5.5rem);
  font-weight: 800;
  color: var(--green);
  line-height: 1;
  letter-spacing: -3px;
  transition: color var(--transition);
}

.result-unit {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-second);
  letter-spacing: .06em;
  margin-top: 6px;
}

.cans-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 1.1rem;
  min-height: 38px;
}

.can-full, .can-faint, .can-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.08), 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), background 0.2s ease, border-color 0.2s ease;
}

.can-full {
  font-size: 20px;
  line-height: 1;
}

.can-faint {
  font-size: 20px;
  line-height: 1;
  opacity: 0.3;
}

.can-more {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-second);
}

.can-full:hover, .can-faint:hover, .can-more:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.18);
}

.cans-obs {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--amber);
  text-align: center;
  margin-top: 0.9rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

/* ---------- Formula Row ---------- */
.formula-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-bottom: 1.75rem;
}

.formula-cell {
  flex: 1;
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: .85rem 1rem;
  text-align: center;
  min-width: 0;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.formula-cell.accent {
  border-color: var(--green);
}

.fc-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-second);
  margin-bottom: 5px;
}

.fc-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.formula-cell.accent .fc-val {
  color: var(--green);
}

.op {
  display: flex;
  align-items: center;
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  flex-shrink: 0;
  padding: 0 2px;
  user-select: none;
}

.op-symbol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  font-size: 18px;
  font-weight: 900;
  color: #E8E4F4;
  letter-spacing: 0;
}

/* ---------- A Sardinha de Amanhã ---------- */
.amanha-card {
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-xl);
  padding: 1.4rem 1.5rem;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.amanha-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1rem;
}

.amanha-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--amber-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.amanha-title {
  font-size: 15px;
  font-weight: 800;
  color: #F0EDF8;
}

.amanha-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-second);
  margin-top: 2px;
}

/* Verdict */
.verdict-box {
  background: rgba(240,160,48,0.12);
  border: 1px solid rgba(240,160,48,0.2);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 14px;
}

.verdict-num {
  font-family: var(--font-sans);
  font-size: 48px;
  font-weight: 800;
  color: var(--amber);
  line-height: 1;
  letter-spacing: -2px;
  flex-shrink: 0;
  min-width: 56px;
  text-align: center;
}

.verdict-text {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  line-height: 1.6;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 1rem;
}

.stat-block {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: .85rem 1rem;
  text-align: center;
}

.sb-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-second);
  margin-bottom: 7px;
  line-height: 1.5;
}

.sb-val {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: #F0EDF8;
  line-height: 1;
}

.sb-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  color: var(--text-second);
  margin-top: 4px;
}

.stat-block.highlight .sb-val {
  color: var(--amber);
}

/* Progress bar */
.progress-wrap {
  margin-top: .75rem;
}

.progress-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-second);
  margin-bottom: 6px;
}

.progress-track {
  background: rgba(255,255,255,0.07);
  border-radius: 4px;
  height: 7px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--green);
  transition: width .35s ease;
}

/* ---------- Timeline ---------- */
.timeline-card {
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-xl);
  padding: 1.2rem 1.4rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.timeline-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.timeline-row:last-child {
  border-bottom: none;
}

.day-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-second);
  width: 38px;
  flex-shrink: 0;
}

.day-bar-wrap {
  flex: 1;
  position: relative;
  height: 18px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  overflow: hidden;
}

.day-bar-bg {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  background: rgba(45,212,160,0.1);
}

.day-bar-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 4px;
  background: var(--green);
  transition: width .38s ease;
}

.day-usl {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--green);
  width: 54px;
  text-align: right;
  flex-shrink: 0;
}

.day-star {
  font-size: 13px;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  color: var(--amber);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--gray-border);
  background: rgba(26, 23, 48, 0.75);
  backdrop-filter: blur(12px);
  padding: 1.5rem 0;
  text-align: center;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-second);
  line-height: 1.8;
}

.footer-formula {
  font-size: 9px !important;
  opacity: .7;
}

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .formula-row { flex-wrap: wrap; }
  .formula-cell { min-width: calc(50% - 20px); }
  .op { padding: 0; }
  .verdict-num { font-size: 38px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   TABS
   ============================================================ */
.tabs-nav {
  display: flex;
  gap: 6px;
  margin: 0 0 1.5rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-lg);
  padding: 5px;
}

.tab-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-second);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  padding: .65rem 1rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.tab-btn:hover {
  background: rgba(255,255,255,0.07);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--gray-card);
  color: var(--green);
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

/* ============================================================
   FORMULA SHEET (aba Fórmulas)
   ============================================================ */
.formula-sheet {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 2.5rem;
}

.fsheet-card {
  background: var(--gray-card);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-xl);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.fsheet-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.2rem;
}

.fsheet-icon {
  font-size: 22px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.fsheet-title {
  font-size: 14px;
  font-weight: 800;
  color: #F0EDF8;
  margin-bottom: 2px;
}

.fsheet-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-second);
}

/* Stats grid inside formula sheet */
.fsheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.fsheet-stat {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  padding: .9rem 1rem;
  text-align: center;
}

.fsheet-stat.accent-green { border-color: rgba(45,212,160,0.35); background: rgba(45,212,160,0.08); }
.fsheet-stat.accent-amber { border-color: rgba(240,160,48,0.35); background: rgba(240,160,48,0.08); }

.fss-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-second);
  margin-bottom: 6px;
}

.fss-val {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: #F0EDF8;
  line-height: 1;
}

.fsheet-stat.accent-green .fss-val { color: var(--green); }
.fsheet-stat.accent-amber .fss-val { color: var(--amber); }

.fss-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  color: var(--text-second);
  margin-top: 4px;
}

/* Equation list */
.fsheet-eq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fsheet-eq {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 1rem 1.1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.feq-name {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--green);
  width: 120px;
  flex-shrink: 0;
}

.feq-expr {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  flex-wrap: wrap;
}

.feq-var {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: #F0EDF8;
  font-style: italic;
}

.feq-op {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-second);
}

/* CSS fraction display */
.feq-frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.feq-num,
.feq-den {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  padding: 2px 8px;
}

.feq-num {
  border-bottom: 2px solid rgba(255,255,255,0.3);
  padding-bottom: 4px;
  color: #F0EDF8;
}

.feq-den {
  color: var(--text-second);
}

/* Formula sheet timeline */
.fsheet-timeline {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 1rem;
}

.fst-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fst-day {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-second);
  width: 38px;
  flex-shrink: 0;
}

.fst-bar-wrap {
  flex: 1;
  height: 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  overflow: hidden;
}

.fst-bar {
  height: 100%;
  background: var(--green);
  border-radius: 4px;
  opacity: 0.6;
  transition: width .4s ease;
}

.fst-bar-full {
  opacity: 1;
}

.fst-usl {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-second);
  width: 80px;
  text-align: right;
  flex-shrink: 0;
}

.fst-usl-full {
  color: var(--amber);
}

.fsheet-note {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-second);
  line-height: 1.6;
  padding: .75rem 1rem;
  background: rgba(255,255,255,0.03);
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.fsheet-note strong {
  color: var(--green);
  font-weight: 800;
}

@media (max-width: 540px) {
  .fsheet-grid { grid-template-columns: 1fr 1fr; }
  .feq-name { width: 100%; }
  .fsheet-eq { flex-direction: column; align-items: flex-start; }
}