/* =============================================
   CALCULADORA IMC — style.css
   ============================================= */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-page:       #1a1a18;
  --bg-card:       #232320;
  --bg-secondary:  #2a2a27;
  --border:        rgba(255, 255, 255, 0.10);
  --border-med:    rgba(255, 255, 255, 0.18);
  --text-primary:  #eeeee8;
  --text-secondary:#a0a09a;
  --text-tertiary: #666660;
  --radius-md:     8px;
  --radius-lg:     12px;
  --radius-xl:     16px;
  --font:          -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --c-bajo:    #2a4f72;
  --c-normal:  #1a5a42;
  --c-sobre:   #6a4a10;
  --c-ob1:     #6a3015;
  --c-ob2:     #7a2a10;
  --c-ob3:     #6a1515;

  --ct-bajo:   #B5D4F4;
  --ct-normal: #9FE1CB;
  --ct-sobre:  #FAC775;
  --ct-ob1:    #F0997B;
  --ct-ob2:    #F0997B;
  --ct-ob3:    #F7C1C1;

  /* Espaciado responsive */
  --pad-page-x: clamp(0.75rem, 4vw, 2rem);
  --pad-card:   clamp(1rem, 3vw, 1.5rem);
  --gap:        clamp(0.75rem, 2vw, 1.25rem);
}



html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding: clamp(1rem, 3vw, 2rem) var(--pad-page-x) clamp(2rem, 6vw, 4rem);
}

.container {
  max-width: 680px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

/* ---- Header ---- */
.header {
  text-align: center;
  padding: 0.25rem 0;
}

.header h1 {
  font-size: clamp(18px, 4vw, 24px);
  font-weight: 600;
  color: var(--text-primary);
}

.header .subtitle {
  font-size: clamp(12px, 2.5vw, 14px);
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---- Card ---- */
.card {
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--pad-card);
}

.section-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ---- Fields ---- */
.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.optional {
  font-size: 12px;
  color: var(--text-tertiary);
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: clamp(8px, 2vw, 10px) 12px;
  border: 0.5px solid var(--border-med);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: clamp(14px, 3vw, 16px);
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
  -moz-appearance: textfield;
  /* Evita zoom en iOS al hacer focus */
  touch-action: manipulation;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

input:focus {
  border-color: #5DCAA5;
  box-shadow: 0 0 0 3px rgba(93, 202, 165, 0.15);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ---- Gender ---- */
.gender-row {
  display: flex;
  gap: 8px;
}

.gender-btn {
  flex: 1;
  padding: clamp(8px, 2vw, 10px);
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-med);
  background: transparent;
  cursor: pointer;
  font-size: clamp(13px, 3vw, 15px);
  color: var(--text-secondary);
  font-family: var(--font);
  transition: all 0.15s;
  /* Área táctil mínima recomendada */
  min-height: 44px;
}

.gender-btn:hover {
  background: var(--bg-secondary);
}

.gender-btn.active {
  background: #1a3d30;
  color: #9FE1CB;
  border-color: #1D9E75;
  font-weight: 500;
}



/* ---- Calc Button ---- */
.calc-btn {
  width: 100%;
  padding: clamp(10px, 2.5vw, 13px);
  background: var(--bg-card);
  border: 0.5px solid var(--border-med);
  border-radius: var(--radius-md);
  font-size: clamp(14px, 3vw, 16px);
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  color: var(--text-primary);
  margin-top: 4px;
  transition: background 0.15s, transform 0.1s;
  min-height: 44px;
  touch-action: manipulation;
}

.calc-btn:hover {
  background: var(--bg-secondary);
}

.calc-btn:active {
  transform: scale(0.985);
}

/* ---- Result ---- */
.result-area {
  display: none;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 0.5px solid var(--border);
}

.result-area.visible {
  display: block;
}

.result-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.imc-big {
  font-size: clamp(38px, 10vw, 52px);
  font-weight: 600;
  line-height: 1;
}

.imc-label {
  font-size: clamp(13px, 3vw, 16px);
  font-weight: 600;
  margin-top: 6px;
}

.imc-sub {
  font-size: clamp(11px, 2.5vw, 13px);
  color: var(--text-secondary);
  margin-top: 3px;
}

.ideal-block {
  text-align: right;
}

.ideal-label {
  font-size: 12px;
  color: var(--text-tertiary);
}

.ideal-val {
  font-size: clamp(15px, 3.5vw, 19px);
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 3px;
}

/* Color classes for IMC */
.col-bajo    { color: var(--c-bajo); }
.col-normal  { color: var(--c-normal); }
.col-sobre   { color: var(--c-sobre); }
.col-ob1     { color: var(--c-ob1); }
.col-ob2     { color: var(--c-ob2); }
.col-ob3     { color: var(--c-ob3); }

/* ---- Bar ---- */
.bar-wrap {
  margin-top: 18px;
  position: relative;
}

.bar-track {
  display: flex;
  gap: 2px;
  height: clamp(7px, 1.5vw, 10px);
  border-radius: 4px;
  overflow: hidden;
}

.bar-seg { height: 100%; border-radius: 2px; }
.seg-bajo   { flex: 0.8;  background: #85B7EB; }
.seg-normal { flex: 1.5;  background: #5DCAA5; }
.seg-sobre  { flex: 1.0;  background: #FAC775; }
.seg-ob1    { flex: 1.0;  background: #F0997B; }
.seg-ob2    { flex: 0.8;  background: #D85A30; }
.seg-ob3    { flex: 0.9;  background: #A32D2D; }

.bar-pointer-row {
  position: relative;
  height: 14px;
}

.pointer-dot {
  position: absolute;
  width: clamp(10px, 2.5vw, 13px);
  height: clamp(10px, 2.5vw, 13px);
  border-radius: 50%;
  background: var(--text-primary);
  top: 1px;
  transform: translateX(-50%);
  transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid var(--bg-card);
}

.bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: clamp(9px, 2vw, 11px);
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* ---- Metric cards ---- */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(6px, 1.5vw, 10px);
  margin-top: 14px;
}

.metric {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: clamp(8px, 2vw, 12px);
  text-align: center;
}

.metric-val {
  font-size: clamp(15px, 3.5vw, 18px);
  font-weight: 600;
}

.metric-lbl {
  font-size: clamp(10px, 2vw, 12px);
  color: var(--text-secondary);
  margin-top: 3px;
}

/* ---- History ---- */
.hist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 8px;
}

.hist-header .section-title {
  margin-bottom: 0;
}

.hist-actions {
  display: flex;
  gap: 6px;
}

.action-btn {
  background: transparent;
  border: 0.5px solid var(--border-med);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  color: var(--text-secondary);
  transition: background 0.15s;
  min-height: 36px;
  touch-action: manipulation;
}

.action-btn:hover {
  background: var(--bg-secondary);
}

.action-btn.danger:hover {
  background: #3a1515;
  color: #F7C1C1;
  border-color: #791F1F;
}



/* Status */
.status-msg {
  font-size: 12px;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s, padding 0.3s;
  border-radius: var(--radius-md);
}
.status-msg.show {
  max-height: 40px;
  padding: 6px 10px;
  margin-bottom: 10px;
}
.status-msg.ok  { background: #1a3d30; color: #9FE1CB; }
.status-msg.err { background: #3a1515; color: #F7C1C1; }


.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: clamp(280px, 45vh, 420px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-med) transparent;
  /* Scroll suave en iOS */
  -webkit-overflow-scrolling: touch;
}

.history-list::-webkit-scrollbar { width: 4px; }
.history-list::-webkit-scrollbar-track { background: transparent; }
.history-list::-webkit-scrollbar-thumb { background: var(--border-med); border-radius: 2px; }

.history-item {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 14px);
  padding: clamp(8px, 2vw, 12px);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border);
}

.hist-time-block {
  text-align: center;
  min-width: 44px;
  flex-shrink: 0;
}

.hist-time {
  font-size: clamp(11px, 2.5vw, 13px);
  font-weight: 600;
  color: var(--text-primary);
}

.hist-date {
  font-size: clamp(10px, 2vw, 11px);
  color: var(--text-tertiary);
  margin-top: 1px;
}

.hist-info {
  flex: 1;
  overflow: hidden;
  min-width: 0;
}

.hist-name {
  font-size: clamp(12px, 2.5vw, 14px);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hist-meta {
  font-size: clamp(10px, 2vw, 12px);
  color: var(--text-secondary);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hist-right {
  text-align: right;
  flex-shrink: 0;
}

.hist-imc {
  font-size: clamp(15px, 3.5vw, 19px);
  font-weight: 600;
}

.hist-badge {
  display: inline-block;
  font-size: clamp(9px, 2vw, 11px);
  padding: 2px 7px;
  border-radius: 99px;
  margin-top: 3px;
  font-weight: 500;
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-tertiary);
  font-size: 14px;
}

.empty-icon {
  display: block;
  font-size: 28px;
  margin-bottom: 10px;
}

/* ---- Reference Table ---- */
.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(12px, 2.5vw, 14px);
}

.ref-table th {
  text-align: left;
  padding: clamp(6px, 1.5vw, 10px) clamp(8px, 2vw, 14px);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 500;
  border-bottom: 0.5px solid var(--border-med);
}

.ref-table td {
  padding: clamp(6px, 1.5vw, 10px) clamp(8px, 2vw, 14px);
  border-bottom: 0.5px solid var(--border);
}

.ref-table tr:last-child td {
  border-bottom: none;
}

.ref-table tr td:first-child {
  font-weight: 500;
}

.row-bajo   td:first-child { color: #85B7EB; }
.row-normal td:first-child { color: #5DCAA5; }
.row-sobre  td:first-child { color: #FAC775; }
.row-ob1    td:first-child { color: #F0997B; }
.row-ob2    td:first-child { color: #F0997B; }
.row-ob3    td:first-child { color: #F7C1C1; }



/* ============================================
   BREAKPOINTS
   ============================================ */

/* Móvil pequeño (< 360px) */
@media (max-width: 359px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .hist-meta {
    display: none;
  }
  .result-top {
    flex-direction: column;
  }
  .ideal-block {
    text-align: left;
  }
}

/* Móvil (360–599px) */
@media (max-width: 599px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
  /* En móvil el badge del historial va debajo del IMC, ya está bien */
}

/* Tablet (600–899px) */
@media (min-width: 600px) and (max-width: 899px) {
  .container {
    max-width: 580px;
  }
}

/* Desktop grande (> 900px) */
@media (min-width: 900px) {
  .container {
    max-width: 680px;
  }
  .history-list {
    max-height: 480px;
  }
}

/* Pantallas muy anchas (> 1400px) */
@media (min-width: 1400px) {
  body {
    padding-top: 3rem;
  }
}