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

/* ─── Default theme: LIGHT ──────────────────────────────────────────── */
:root {
  /* Colors */
  --bg:         #f4f4f8;
  --bg-card:    #ffffff;
  --bg-card2:   #eeedf8;
  --border:     rgba(0,0,0,0.09);
  --border-h:   rgba(0,0,0,0.18);
  --text:       #1a1a2e;
  --text-muted: #60608c;
  /* Accents — same in both modes */
  --accent:     #7c6af7;
  --accent2:    #5ec4f0;
  --accent3:    #f06ec4;
  --green:      #4ade80;
  --red:        #f87171;
  /* Button colors */
  --btn-num:    #e8e8f2;
  --btn-op:     #e0daf8;
  --btn-fn:     #d8f0f8;
  --btn-util:   #ededf6;
  --btn-trig:   #d4f0dd;
  --accent-trig:#2d7a4a;
  /* Layout — same in both modes */
  --radius:     1rem;
  --radius-sm:  0.5rem;
  --shadow:     0 8px 40px rgba(0,0,0,0.08);
  --font:       'Inter', sans-serif;
  --mono:       'JetBrains Mono', monospace;
  --transition: 0.18s ease;
}

/* ─── Dark theme override ────────────────────────────────────────────── */
:root[data-theme="dark"] {
  --bg:         #0d0d12;
  --bg-card:    #14141e;
  --bg-card2:   #1a1a28;
  --border:     rgba(255,255,255,0.07);
  --border-h:   rgba(255,255,255,0.15);
  --text:       #e8e8f0;
  --text-muted: #7878a0;
  --btn-num:    #1e1e2e;
  --btn-op:     #2d2750;
  --btn-fn:     #1e2832;
  --btn-util:   #252538;
  --btn-trig:   #162a1e;
  --accent-trig:#52c47a;
  --shadow:     0 8px 40px rgba(0,0,0,0.5);
}

/* ─── Component overrides per theme ─────────────────────────────────── */
/* Hero */
.hero { background: linear-gradient(160deg, #f0effc 0%, #f4f4f8 60%); }
:root[data-theme="dark"] .hero { background: none; }

/* Inputs / selects */
input, select {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}

/* Orbs */
.orb-1, .orb-2, .orb-3 { opacity: 0.35; }
:root[data-theme="dark"] .orb-1,
:root[data-theme="dark"] .orb-2,
:root[data-theme="dark"] .orb-3 { opacity: 0.18; }

/* Display */
.display-wrapper { background: rgba(0,0,0,0.04); }
:root[data-theme="dark"] .display-wrapper { background: var(--bg); }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 3px; }

/* ─── Header ─────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 250;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(244,244,248,0.88);   /* light default */
  border-bottom: 1px solid var(--border);
}
:root[data-theme="dark"] .site-header {
  background: rgba(13,13,18,0.82);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
}
.logo-icon {
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-pills {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}
.nav-pill {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid transparent;
}
.nav-pill:hover, .nav-pill.active {
  color: var(--text);
  background: var(--bg-card2);
  border-color: var(--border-h);
}

/* ─── Hero ───────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 7rem 2rem 6rem;
  text-align: center;
}

.hero-content { position: relative; z-index: 1; }

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Floating orbs */
.hero-orbs { position: absolute; inset: 0; pointer-events: none; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  animation: float 8s ease-in-out infinite;
}
.orb-1 { width: 500px; height: 500px; background: var(--accent);  top: -100px; left: -100px; animation-delay: 0s; }
.orb-2 { width: 400px; height: 400px; background: var(--accent2); top: -50px; right: -50px;  animation-delay: 3s; }
.orb-3 { width: 300px; height: 300px; background: var(--accent3); bottom: -80px; left: 40%;  animation-delay: 6s; }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-30px) scale(1.05); }
}

/* ─── Layout ─────────────────────────────────────────────────────────── */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 6rem;
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

/* ─── Section header ──────────────────────────────────────────────────── */
.calc-section { display: flex; flex-direction: column; gap: 2rem; }

.section-header { display: flex; flex-direction: column; gap: 0.4rem; }



.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ─── Cards ──────────────────────────────────────────────────────────── */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  transition: border-color var(--transition);
}
.calc-card:hover { border-color: var(--border-h); }
.calc-card--wide { display: block; }

/* ─── Display ────────────────────────────────────────────────────────── */
.display-wrapper {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  min-height: 5.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  overflow: hidden;
}

.display-expr {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--mono);
  min-height: 1.2em;
  word-break: break-all;
  text-align: right;
}

.display-value {
  font-family: var(--mono);
  font-size: 2.4rem;
  font-weight: 500;
  color: var(--text);
  word-break: break-all;
  text-align: right;
  transition: transform 0.1s;
}
.display-value.pop { transform: scale(1.05); }

/* ─── Button grids ───────────────────────────────────────────────────── */
.btn-grid {
  display: grid;
  gap: 0.6rem;
}

.basic-grid {
  grid-template-columns: repeat(4, 1fr);
}

.sci-grid {
  grid-template-columns: repeat(5, 1fr);
}

.btn {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  padding: 1rem;
  cursor: pointer;
  transition: filter var(--transition), transform 0.08s, box-shadow var(--transition);
  border: 1px solid transparent;
  line-height: 1;
}
.btn:hover  { filter: brightness(1.25); border-color: var(--border-h); }
.btn:active { transform: scale(0.94); filter: brightness(0.9); }

.btn-num  { background: var(--btn-num); color: var(--text); }
.btn-op   { background: var(--btn-op);  color: var(--accent); font-size: 1.2rem; }
.btn-fn   { background: var(--btn-fn);  color: var(--accent2); font-size: 0.82rem; }
.btn-util { background: var(--btn-util); color: var(--text-muted); }
.btn-trig { background: var(--btn-trig); color: var(--accent-trig); font-size: 0.82rem; }
.btn-trig.active { background: var(--accent-trig); color: #fff; }
.sci-span2 { grid-column: span 2; }
.btn-zero { grid-column: span 2; text-align: left; padding-left: 1.4rem; }

.btn-eq {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  font-size: 1.3rem;
  box-shadow: 0 4px 20px rgba(124,106,247,0.35);
}
.btn-eq:hover { filter: brightness(1.15); box-shadow: 0 6px 28px rgba(124,106,247,0.5); }

/* ─── Basic calc layout ──────────────────────────────────────────────── */
.basic-calc { flex: 1; min-width: 280px; max-width: 340px; }

/* ─── History ────────────────────────────────────────────────────────── */
.history-panel {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.history-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.4rem;
  max-height: 360px;
}

.history-entry {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  animation: slideIn 0.2s ease;
}
.history-entry:hover { border-color: var(--border-h); color: var(--text); }
.history-entry .he-result { color: var(--accent2); font-weight: 500; }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(10px); }
  to   { opacity: 1; transform: translateX(0); }
}

.clear-history-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}
.clear-history-btn:hover { border-color: var(--red); color: var(--red); }

/* ─── Scientific calc ────────────────────────────────────────────────── */
.sci-calc { display: flex; flex-direction: column; }

.sci-mode-toggle {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
  align-self: flex-start;
}
.mode-btn {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
}
.mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ─── Financial cards ─────────────────────────────────────────────────── */
.fin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.fin-card { display: flex; flex-direction: column; gap: 1.25rem; flex: unset; }

/* Salary card and Autónomos card: full-width on wide screens */
@media (min-width: 700px) {
  .fin-card--salary  { grid-column: span 2; }
  .fin-card--autonomo { grid-column: span 2; }
}

.fin-card-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.fin-icon { font-size: 1.2rem; }

.fin-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

input[type="number"], input[type="date"], select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.6rem 0.85rem;
  outline: none;
  width: 100%;
  transition: border-color var(--transition);
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type="number"]:focus, input[type="date"]:focus, select:focus { border-color: var(--accent); }
input[type="date"] { font-family: var(--font); }
select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237878a0' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.85rem center; padding-right: 2.2rem; }

.calc-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: filter var(--transition), transform 0.08s;
  box-shadow: 0 4px 16px rgba(124,106,247,0.3);
}
.calc-btn:hover  { filter: brightness(1.15); }
.calc-btn:active { transform: scale(0.97); }

.fin-result {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.85rem;
  line-height: 1.8;
  min-height: 3rem;
  color: var(--text-muted);
  display: none;
}
.fin-result.visible { display: block; animation: fadeUp 0.3s ease; }
.fin-result .highlight {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green);
}
.fin-result .label { color: var(--text-muted); font-size: 0.78rem; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Converter ──────────────────────────────────────────────────────── */
.conv-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}

.conv-tab {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.4rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
}
.conv-tab:hover  { border-color: var(--border-h); color: var(--text); }
.conv-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.conv-body { display: flex; flex-direction: column; gap: 1.5rem; }

.conv-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.conv-field {
  flex: 1;
  min-width: 180px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.conv-field input  { font-size: 1.2rem; padding: 0.75rem 1rem; }
.conv-field select { font-size: 0.9rem; }

.swap-btn {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--accent2);
  border-radius: 50%;
  width: 2.6rem;
  height: 2.6rem;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.6rem;
}
.swap-btn:hover { border-color: var(--accent2); background: var(--accent2); color: #fff; transform: rotate(180deg); }

.conv-all {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem;
}

.conv-all-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  animation: fadeUp 0.2s ease;
}
.conv-all-item .cai-val  { font-family: var(--mono); font-size: 0.95rem; color: var(--text); font-weight: 500; }
.conv-all-item .cai-unit { color: var(--text-muted); font-size: 0.75rem; }

/* ─── Footer ─────────────────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
}

/* ─── Language toggle ────────────────────────────────────────────────── */
.lang-toggle {
  display: flex;
  gap: 0.2rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem;
}
.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}
.lang-btn.active { background: var(--accent); color: #fff; }
.lang-btn:not(.active):hover { color: var(--text); }

/* ─── Theme toggle ───────────────────────────────────────────────────── */
.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.theme-btn:hover { border-color: var(--border-h); color: var(--text); }
.theme-icon--moon { display: none; }
:root[data-theme="dark"] .theme-icon--sun  { display: none; }
:root[data-theme="dark"] .theme-icon--moon { display: block; }

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ─── Region selector ────────────────────────────────────────────────── */
.region-select { position: relative; }

.region-btn {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.38rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.region-btn:hover { border-color: var(--border-h); }
.region-label { max-width: 120px; overflow: hidden; text-overflow: ellipsis; }
.region-arrow { color: var(--text-muted); flex-shrink: 0; transition: transform 0.2s; }
.region-select.open .region-arrow { transform: rotate(180deg); }

.region-menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 195px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  padding: 0.35rem;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  z-index: 200;
  animation: fadeInDown 0.15s ease;
}
.region-select.open .region-menu { display: flex; }

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.region-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.75rem;
  border: none;
  background: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 0.55rem;
  text-align: left;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
  width: 100%;
}
.region-option:hover  { background: rgba(255,255,255,0.07); color: var(--text); }
.region-option.active { color: var(--accent); font-weight: 600; }

@media (max-width: 700px) {
  .region-label { display: none; }
  .region-btn   { padding: 0.38rem 0.6rem; gap: 0.25rem; }
  .region-menu  {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    min-width: unset;
    width: 100%;
    border-radius: 1.25rem 1.25rem 0 0;
    padding: 0.5rem 0.5rem 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
    animation: slideUp 0.22s ease;
  }
  @keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .region-option { justify-content: flex-start; padding: 0.75rem 1rem; font-size: 0.95rem; }
  .region-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 240;  /* below header (250) → menu inside header always wins */
  }
  .region-menu {
    z-index: 260;  /* within header's stacking context, extra safety */
  }
  .region-overlay.visible { display: block; }
}

/* ─── Period toggle (salary annual/monthly) ──────────────────────────── */
.period-toggle {
  display: flex;
  gap: 0.3rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem;
  width: fit-content;
}
.period-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}
.period-btn.active { background: var(--accent2); color: #fff; }
.period-btn:not(.active):hover { color: var(--text); }

/* ─── Salary breakdown result ────────────────────────────────────────── */
.sal-breakdown { display: flex; flex-direction: column; gap: 0.45rem; }
.sal-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.sal-row .sal-val { font-family: var(--mono); font-size: 0.85rem; color: var(--text); }
.sal-deduct .sal-val { color: var(--red); }
.sal-net { font-weight: 600; }
.sal-net span:first-child { color: var(--text); }
.sal-net .sal-val.highlight { color: var(--green); font-size: 1rem; }
.sal-divider {
  border-top: 1px dashed var(--border-h);
  margin: 0.3rem 0;
}
.sal-note {
  margin-top: 0.75rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0.7;
  line-height: 1.5;
}

/* ─── Memory row (basic calc) ───────────────────────────────────────── */
.mem-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.btn-mem {
  background: var(--btn-fn);
  border: none;
  color: var(--accent2);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.03em;
}
.btn-mem:hover { filter: brightness(1.2); }

/* ─── Spain advanced salary options ─────────────────────────────────── */
.sal-es-opts {
  border-top: 1px solid var(--border);
  padding-top: 0.9rem;
  margin-top: 0.1rem;
}
.sal-es-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.sal-es-grid label {
  font-size: 0.78rem;
}
.sal-es-grid select,
.sal-es-grid input[type="number"] {
  font-size: 0.8rem;
  padding: 0.45rem 0.7rem;
}
.sal-es-grid select { padding-right: 2rem; }
.sal-check-row {
  grid-column: span 2;
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem !important;
  cursor: pointer;
}
.sal-check-row input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}
.sal-check-row span { font-size: 0.82rem !important; color: var(--text-muted); }

/* ─── Herramientas: porcentajes ─────────────────────────────────────── */
.pct-calc { display: flex; flex-direction: column; gap: 0.75rem; }
.pct-row  { display: flex; flex-direction: column; gap: 0.35rem; }
.pct-label { font-size: 0.78rem; color: var(--text-muted); }
.pct-sep   { height: 1px; background: var(--border); margin: 0.1rem 0; }
.pct-inline {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
}
.pct-inp {
  width: 4.5rem;
  padding: 0.35rem 0.5rem;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card2);
  color: var(--text);
  text-align: right;
}
.pct-sign {
  padding: 0.35rem 0.4rem;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card2);
  color: var(--text);
}
.pct-res {
  color: var(--accent);
  font-size: 1rem;
  font-weight: 700;
  min-width: 3rem;
}

/* ─── Cookie banner ──────────────────────────────────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--bg-card);
  border-top: 1px solid var(--border-h);
  padding: 1rem 2rem;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1);
  backdrop-filter: blur(20px);
}
.cookie-banner.visible { transform: translateY(0); }

.cookie-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.cookie-msg { font-size: 0.85rem; color: var(--text-muted); flex: 1; min-width: 200px; line-height: 1.6; }
.cookie-actions { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.cookie-policy-link { font-size: 0.8rem; color: var(--text-muted); text-decoration: underline; }
.cookie-policy-link:hover { color: var(--text); }
.cookie-btn {
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.cookie-decline { background: none; color: var(--text-muted); }
.cookie-decline:hover { border-color: var(--border-h); color: var(--text); }
.cookie-accept { background: var(--accent); color: #fff; border-color: var(--accent); }
.cookie-accept:hover { filter: brightness(1.15); }

/* ─── Ad banner placeholder ──────────────────────────────────────────── */
.ad-banner {
  max-width: 1200px;
  margin: 0 auto 2rem;
  padding: 0 2rem;
}
.ad-label {
  display: block;
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  opacity: 0.4;
}

/* ─── SEO content blocks ─────────────────────────────────────────────── */
.seo-content { margin-top: 2rem; }

.seo-block h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 2rem 0 0.6rem;
  letter-spacing: -0.02em;
}
.seo-block h3:first-child { margin-top: 0; }

.seo-block p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

.faq-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.5rem; }

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border-h); }

.faq-item summary {
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.1rem;
  color: var(--accent);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item p {
  padding: 0 1rem 0.85rem;
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0;
}

/* ─── Footer links ───────────────────────────────────────────────────── */
.site-footer { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.25rem 1.25rem; }
.privacy-link { font-size: 0.8rem; color: var(--text-muted); text-decoration: underline; transition: var(--transition); }
.privacy-link:hover { color: var(--text); }

/* ─── Compare two salaries ───────────────────────────────────────────── */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.compare-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.compare-header {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.compare-btn {
  background: none;
  border: 1px dashed var(--border-h);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
  width: 100%;
  margin-top: 0.35rem;
}
.compare-btn:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 480px) {
  .compare-grid { grid-template-columns: 1fr; }
}

/* ─── Compound interest chart canvas ─────────────────────────────────── */
.compound-chart {
  display: block;
  width: 100%;
  height: 160px;
  margin-top: 1rem;
  border-radius: var(--radius-sm);
}

/* ─── Mortgage amortization table ────────────────────────────────────── */
.amort-details {
  margin-top: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.amort-details summary {
  padding: 0.6rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: var(--transition);
}
.amort-details summary:hover { color: var(--text); }
.amort-details summary::-webkit-details-marker { display: none; }
.amort-details[open] summary { border-bottom: 1px solid var(--border); }
.amort-scroll {
  max-height: 260px;
  overflow-y: auto;
}
.amort-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-family: var(--mono);
}
.amort-table th, .amort-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.amort-table th {
  background: var(--bg-card2);
  color: var(--text-muted);
  font-weight: 600;
  position: sticky; top: 0;
}
.amort-table td { color: var(--text-muted); }
.amort-table tr:last-child td { border-bottom: none; }
.amort-table tr:hover td { background: var(--bg-card2); }
.ta-r { text-align: right; }
.amort-int { color: var(--red) !important; }
.amort-bal { color: var(--accent) !important; }

/* ─── Copy button ─────────────────────────────────────────────────────── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  padding: 0.35rem 0.85rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.copy-btn:hover { border-color: var(--border-h); color: var(--text); }
.copy-btn.copied { border-color: var(--green); color: var(--green); }

/* ─── Input error message ────────────────────────────────────────────── */
.input-error {
  color: var(--red);
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ─── Tooltip on labels ──────────────────────────────────────────────── */
.tip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.65rem;
  color: var(--text-muted);
  cursor: help;
  vertical-align: middle;
  margin-left: 0.3rem;
  position: relative;
  flex-shrink: 0;
}
.tip:hover::after {
  content: attr(data-tip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
  font-size: 0.75rem;
  font-family: var(--font);
  color: var(--text);
  white-space: nowrap;
  max-width: 240px;
  white-space: normal;
  width: max-content;
  max-width: 220px;
  z-index: 50;
  box-shadow: var(--shadow);
  pointer-events: none;
  line-height: 1.5;
}

/* ─── Badge "2026" en cards ──────────────────────────────────────────── */
.fin-card-title .badge {
  font-size: 0.62rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  letter-spacing: 0.04em;
  vertical-align: middle;
  margin-left: 0.4rem;
}

/* ─── Dashboard cards ───────────────────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem 5rem;  /* 4rem top gap between hero and cards */
}
.calc-page-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), transform 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow);
}
.calc-page-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(124,106,247,0.18);
}
.cpc-icon { font-size: 2.2rem; flex-shrink: 0; line-height: 1; }
.cpc-body  { flex: 1; min-width: 0; }
.cpc-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; letter-spacing: -0.01em; }
.cpc-desc  { font-size: 0.78rem; color: var(--text-muted); line-height: 1.55; }
.cpc-arrow { font-size: 1.2rem; color: var(--accent); flex-shrink: 0; opacity: 0.5;
             transition: opacity var(--transition), transform 0.15s; }
.calc-page-card:hover .cpc-arrow { opacity: 1; transform: translateX(4px); }

/* ─── Page intro block (above calculator on inner pages) ─────────────── */
.page-intro {
  max-width: 720px;
  margin-bottom: 2.5rem;
}
.page-intro h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 0.75rem;
  line-height: 1.15;
}
.page-intro p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.page-intro .breadcrumb {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.page-intro .breadcrumb a { color: var(--text-muted); text-decoration: none; }
.page-intro .breadcrumb a:hover { color: var(--accent); }

/* ─── Language visibility blocks ────────────────────────────────────── */
.lang-en { display: none; }
[data-lang="en"] .lang-es { display: none; }
[data-lang="en"] .lang-en { display: block; }

/* ─── Button guide section (bottom of calculator pages) ─────────────── */
.btn-guide {
  background: var(--bg-card2);
  border-top: 1px solid var(--border);
  padding: 3.5rem 2rem;
  margin-top: 2rem;
}
.btn-guide-inner {
  max-width: 960px;
  margin: 0 auto;
}
.btn-guide-title {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}
.btn-guide-groups {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}
.btn-guide-group h3 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.btn-guide-group dl {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.btn-guide-group dl > div {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
}
.btn-guide-group dt {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--text);
}
.btn-guide-group dd {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}
.btn-guide-group dd code, .btn-guide-group dd kbd {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
}
@media (max-width: 600px) {
  .btn-guide { padding: 2.5rem 1rem; }
  .btn-guide-groups { grid-template-columns: 1fr; }
}

/* ─── Financial sub-dashboard ───────────────────────────────────────── */
.fin-sub { display: none; }

.fin-grid--single {
  max-width: 860px;
  margin: 0 auto;
}

.fin-sub-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 0.5rem;
}

.fin-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem 0;
  letter-spacing: -0.01em;
}
.fin-back:hover { text-decoration: underline; }

.fin-dash-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 2rem;
}

.fin-dash-group {
  margin-bottom: 2.5rem;
}

.fin-dash-group-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

.fin-dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}

.fin-dash-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  text-align: left;
  width: 100%;
  color: var(--text);
  transition: box-shadow var(--transition), border-color var(--transition), transform 0.12s;
}
.fin-dash-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.fin-dash-icon { font-size: 1.7rem; flex-shrink: 0; line-height: 1; }

.fin-dash-body { flex: 1; min-width: 0; }

.fin-dash-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.fin-dash-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.fin-dash-arrow {
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition), transform 0.15s;
}
.fin-dash-card:hover .fin-dash-arrow { opacity: 1; transform: translateX(4px); }

@media (max-width: 600px) {
  .fin-dash-grid { grid-template-columns: 1fr; }
  .fin-dash-wrap { padding: 0 1rem 2rem; }
}

/* ─── FAQ section (bottom of page) ──────────────────────────────────── */
.faq-section {
  background: var(--bg-card2);
  border-top: 1px solid var(--border);
  padding: 4rem 2rem;
  margin-top: 2rem;
}
.faq-section-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.faq-section-title {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}
@media (max-width: 700px) {
  .faq-section { padding: 3rem 1rem; }
}

/* ─── Feedback button + modal ────────────────────────────────────────── */
.feedback-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 150;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(124,106,247,0.4);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: filter var(--transition), transform 0.15s;
}
.feedback-fab:hover { filter: brightness(1.15); transform: translateY(-2px); }

.feedback-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 300;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.feedback-overlay.open { display: flex; animation: fadeIn 0.18s ease; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.feedback-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: slideUp 0.22s ease;
  position: relative;
}
.feedback-modal h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}
.feedback-modal p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}
.feedback-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem;
  transition: color var(--transition);
}
.feedback-close:hover { color: var(--text); }

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.feedback-form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.88rem;
  padding: 0.65rem 0.85rem;
  resize: vertical;
  min-height: 100px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
}
.feedback-form textarea:focus { border-color: var(--accent); }
.feedback-success {
  display: none;
  text-align: center;
  padding: 1rem 0;
}
.feedback-success .success-icon { font-size: 2.5rem; display: block; margin-bottom: 0.5rem; }
.feedback-success p { color: var(--text); font-weight: 500; }

/* ─── prefers-reduced-motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .orb { animation: none; }
  .gradient-text { animation: none; }
}

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .hero { padding: 5rem 1.5rem 4rem; }
  .main-content { padding: 0 1rem 4rem; gap: 4rem; }
  .header-inner { padding: 0.75rem 1rem; }
  .calc-card { padding: 1.25rem; gap: 1.25rem; }
  .display-value { font-size: 1.8rem; }
  .basic-calc { max-width: 100%; }
  .conv-row { gap: 0.75rem; }

  /* Fix 1: backdrop-filter en el header crea containing block para position:fixed,
     rompiendo el menú de región móvil. Se elimina en móvil y se pone fondo opaco. */
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--bg);
  }
  :root[data-theme="dark"] .site-header {
    background: var(--bg);
  }

  /* Fix 2: sci-grid mantiene 5 columnas en móvil para respetar los span 2.
     Botones más compactos para caber en pantallas pequeñas. */
  .sci-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 0.35rem;
  }
  .sci-grid .btn {
    padding: 0.5rem 0.1rem;
    font-size: 0.72rem;
  }
  .sci-grid .btn-op  { font-size: 1rem; }
  .sci-grid .btn-eq  { font-size: 1rem; }
  .sci-grid .btn-num { font-size: 0.85rem; }
}