/* ==========================================================================
   FUNDACIÓN IDEAL SCIENTIFIC · BOROSILICATO 3.3 & ÓPTICA (idealscientific.org)
   100% Bespoke Quartz Mist, Spectral Indigo, Cyan Refraction & Sodium Flame Theme
   Zero '$' symbols anywhere.
   ========================================================================== */

:root {
  --bg-quartz: #F4F3FB;
  --bg-lavender: #E8E6F6;
  --bg-card: #FFFFFF;
  --indigo-950: #13112B;
  --indigo-900: #1E1B4B;
  --indigo-700: #3730A3;
  --cyan-refract: #0891B2;
  --flame-sodium: #D97706;
  --rose-spectrum: #E11D48;
  --text-dark: #13112B;
  --text-body: #322E54;
  --text-muted: #5E5985;
  --border-glass: #CBC7E8;
  --font-display: 'Syne', sans-serif;
  --font-sans: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-quartz);
  color: var(--text-dark);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-quartz);
  color: var(--text-dark);
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .hero-title, .section-title {
  font-family: var(--font-display);
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p, li { text-wrap: pretty; color: var(--text-body); }
a { color: var(--indigo-700); text-decoration: none; transition: all 0.2s ease; }
a:hover { color: var(--rose-spectrum); }
:focus-visible { outline: 3px solid var(--indigo-700); outline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; top: -100px; left: 16px; background: var(--indigo-900); color: #FFF; padding: 12px 20px; z-index: 9999; }
.skip-link:focus { top: 16px; }

/* ==========================================================================
   UNIQUE HEADER: GRADUATED VOLUMETRIC BURETTE SCALE + SPECTRAL PRISM BORDER
   ========================================================================== */
.is-burette-header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(19, 17, 43, 0.06);
}

.is-milliliter-scale {
  background: var(--indigo-900);
  color: #E0E7FF;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  padding: 5px 24px;
}

.is-scale-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.is-scale-tick {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.is-scale-tick strong { color: #38BDF8; }

.is-header-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.is-prism-line {
  height: 4px;
  background: linear-gradient(90deg, #3730A3 0%, #0891B2 35%, #F59E0B 70%, #E11D48 100%);
}

.is-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-dark) !important;
  flex-shrink: 0;
}

.is-hex-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1E1B4B 0%, #3730A3 100%);
  border: 1.5px solid #38BDF8;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 700;
}

.is-brand-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.04rem;
  color: var(--indigo-950);
  white-space: nowrap;
}

.is-brand-text small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--indigo-700);
  white-space: nowrap;
}

.is-tab-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.is-tab-nav a {
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-body);
  border: 1px solid transparent;
  white-space: nowrap;
}

.is-tab-nav a span {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--cyan-refract);
  margin-right: 3px;
}

.is-tab-nav a:hover,
.is-tab-nav a.active {
  background: var(--bg-lavender);
  border-color: var(--border-glass);
  color: var(--indigo-900);
}

.is-blueprint-btn {
  background: var(--indigo-900) !important;
  color: #FFFFFF !important;
  padding: 9px 15px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  border-bottom: 3px solid var(--flame-sodium);
  white-space: nowrap;
  flex-shrink: 0;
}

.is-blueprint-btn:hover { background: var(--indigo-700) !important; }

#mobileMenuToggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  background: var(--indigo-900);
  color: #FFF;
  border: none;
  border-radius: 8px;
}
#mobileDrawer { display: none; background: #FFF; padding: 16px 24px; border-top: 1px solid var(--border-glass); }
#mobileDrawer.is-open { display: block; }
.mobile-nav-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }

/* Buttons */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 10px 18px; border-radius: 8px;
  background: var(--indigo-700); color: #FFFFFF !important;
  font-family: var(--font-sans); font-weight: 700; font-size: 0.84rem;
  border: 2px solid var(--indigo-700); cursor: pointer; white-space: nowrap;
}
.btn-primary:hover { background: var(--indigo-900); border-color: var(--indigo-900); }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 10px 18px; border-radius: 8px;
  background: transparent; color: var(--indigo-900) !important;
  font-family: var(--font-sans); font-weight: 700; font-size: 0.84rem;
  border: 2px solid var(--indigo-900); cursor: pointer; white-space: nowrap;
}

/* ==========================================================================
   UNIQUE HERO: TOP CENTERED SCIENTIFIC MASTHEAD + 3-COLUMN TRIPTYCH STAGE
   ========================================================================== */
.is-prism-hero {
  padding: 20px 0 46px;
}

.is-hero-masthead {
  background: #FFFFFF;
  border: 1.5px solid var(--border-glass);
  border-radius: 18px;
  padding: 18px 26px;
  margin-bottom: 18px;
  display: grid;
  grid-template-columns: 2.6fr 6.8fr 2.6fr;
  gap: 18px;
  align-items: center;
  box-shadow: 0 12px 28px rgba(19, 17, 43, 0.05);
}

.is-mast-side-box {
  background: var(--bg-quartz);
  border: 1px solid var(--border-glass);
  border-left: 4px solid var(--indigo-700);
  padding: 10px 12px;
  border-radius: 10px;
}

.is-mast-side-box.right-box {
  border-left: 1px solid var(--border-glass);
  border-right: 4px solid var(--flame-sodium);
  text-align: right;
}

.is-mast-side-box small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.is-mast-side-box strong {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--indigo-900);
}

.is-mast-center {
  text-align: center;
}

.is-mast-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--indigo-700);
  background: var(--bg-lavender);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.is-mast-center h1 {
  font-size: clamp(1.5rem, 2.05vw, 1.98rem);
  line-height: 1.1;
  margin-bottom: 6px;
}

.is-mast-center h1 span {
  color: var(--indigo-700);
}

.is-mast-center p {
  font-size: 0.84rem;
  max-width: 680px;
  margin: 0 auto;
}

/* BOTTOM ROW: 3-COLUMN SCIENTIFIC TRIPTYCH (3.4fr : 5.2fr : 3.4fr) */
.is-triptych-grid {
  display: grid;
  grid-template-columns: 3.4fr 5.2fr 3.4fr;
  gap: 18px;
  align-items: stretch;
}

.is-din-dark-col {
  background: var(--indigo-900);
  color: #FFFFFF;
  border-radius: 18px;
  padding: 20px;
  border-top: 4px solid #38BDF8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.is-din-dark-col h2 {
  color: #FFFFFF;
  font-size: 1.12rem;
  margin-bottom: 8px;
}

.is-din-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin: 10px 0 14px;
}

.is-din-row {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 7px 10px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.is-din-row strong { color: #38BDF8; }

.is-torch-center-col {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid var(--indigo-900);
  min-height: 390px;
  box-shadow: 0 16px 36px rgba(19, 17, 43, 0.12);
}

.is-torch-center-col img {
  width: 100%;
  height: 100%;
  min-height: 390px;
  object-fit: cover;
}

.is-torch-glass-bar {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  background: rgba(19, 17, 43, 0.9);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  border: 1px solid #38BDF8;
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.is-right-apparatus-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.is-apparatus-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-glass);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 12px;
  align-items: center;
  flex: 1;
}

.is-apparatus-card img {
  width: 104px;
  height: 145px;
  object-fit: cover;
  border-radius: 10px;
}

.is-apparatus-card span {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  color: var(--cyan-refract);
  display: block;
  margin-bottom: 3px;
}

.is-apparatus-card h3 {
  font-size: 0.96rem;
  margin-bottom: 4px;
}

.is-apparatus-card p {
  font-size: 0.76rem;
  line-height: 1.35;
  margin: 0;
}

/* ==========================================================================
   SECTIONS & 3-COLUMN SCIENTIFIC APPARATUS CARDS
   ========================================================================== */
.section-pad { padding: 68px 0; }
.section-alt {
  padding: 68px 0;
  background: var(--bg-lavender);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  content-visibility: auto;
  contain-intrinsic-size: auto 520px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 36px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--indigo-700);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.section-title { font-size: clamp(1.65rem, 2.5vw, 2.25rem); }

.is-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.is-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-glass);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.is-card h3 { font-size: 1.16rem; margin: 8px 0; }
.is-card p { font-size: 0.9rem; margin-bottom: 14px; }

.is-card-foot {
  padding-top: 12px;
  border-top: 1px dashed var(--border-glass);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

/* ==========================================================================
   INTERACTIVE BOROSILICATE & OPTICS SIMULATOR
   ========================================================================== */
.is-sim-wrap {
  background: #FFFFFF;
  border: 2px solid var(--indigo-900);
  border-radius: 18px;
  padding: 32px;
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: 28px;
}

.is-sim-screen {
  background: var(--indigo-900);
  color: #FFFFFF;
  border-radius: 14px;
  padding: 26px;
  border-left: 5px solid #38BDF8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.is-sim-price {
  font-family: var(--font-display);
  font-size: 2.3rem;
  font-weight: 700;
  color: #38BDF8;
  margin: 8px 0;
}

/* Tables, Forms, Accordion */
.table-wrap { overflow-x: auto; background: #FFF; border: 1.5px solid var(--border-glass); border-radius: 14px; }
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th { background: var(--indigo-900); color: #FFF; padding: 14px 18px; font-family: var(--font-mono); font-size: 0.78rem; }
.data-table td { padding: 14px 18px; border-bottom: 1px solid var(--border-glass); font-size: 0.92rem; }

.form-group { margin-bottom: 16px; }
.form-label { display: block; font-weight: 700; font-size: 0.86rem; margin-bottom: 6px; }
.form-input, .form-select, .form-textarea {
  width: 100%; min-height: 46px; padding: 10px 14px;
  border: 1.5px solid var(--border-glass); border-radius: 10px;
  background: #FFFFFF; font-family: var(--font-sans); font-size: 0.95rem;
}
.form-input:user-valid { border-color: #15803D; }
.form-input:user-invalid { border-color: #B91C1C; }

.accordion-list { display: flex; flex-direction: column; gap: 12px; }
.accordion-item { background: #FFF; border: 1.5px solid var(--border-glass); border-radius: 12px; }
.accordion-header {
  width: 100%; min-height: 52px; padding: 14px 20px; background: none; border: none;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; text-align: left; cursor: pointer;
}
.accordion-panel { padding: 0 20px 18px; display: none; }
.accordion-item.is-open .accordion-panel { display: block; }

.page-banner {
  background: var(--indigo-900);
  color: #FFF;
  padding: 44px 0;
  border-bottom: 4px solid #38BDF8;
}
.page-banner h1 { color: #FFF; font-size: clamp(1.9rem, 3vw, 2.7rem); margin-top: 8px; }
.breadcrumb { font-family: var(--font-mono); font-size: 0.78rem; color: #38BDF8; }
.breadcrumb a { color: #FFF; }

/* Footer */
.site-footer {
  background: var(--indigo-950);
  color: #D8D6F2;
  padding: 64px 0 36px;
  border-top: 5px solid var(--indigo-700);
  content-visibility: auto;
  contain-intrinsic-size: auto 520px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 32px; margin-bottom: 40px; }
.footer-title { color: #FFF; font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 14px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: #D8D6F2; font-size: 0.88rem; }
.footer-links a:hover { color: #38BDF8; }
.regret-box {
  display: inline-block; margin-top: 12px; padding: 10px 16px;
  background: rgba(56, 189, 248, 0.16); border: 1.5px solid #38BDF8;
  border-radius: 10px; color: #FFF !important; font-weight: 700; font-size: 0.82rem;
}

.cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 9999;
  background: var(--indigo-950); color: #FFF; padding: 14px 24px;
  border-top: 3px solid #38BDF8;
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
}
.cookie-banner.is-hidden { display: none; }

@media (max-width: 1080px) {
  .is-milliliter-scale, .is-tab-nav { display: none; }
  #mobileMenuToggle { display: inline-flex; align-items: center; justify-content: center; }
  .is-hero-masthead, .is-triptych-grid, .is-grid-3, .is-sim-wrap, .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}