/* ==========================================================================
   CGPA Converter - Pixel-Perfect Modern Clean Design System
   Exact match to requested visual styling: Clean White/Blue SaaS Aesthetic
   ========================================================================== */

:root {
  /* Brand Colors */
  --primary-blue: #2563eb;
  --primary-blue-hover: #1d4ed8;
  --primary-blue-light: #eff6ff;
  --primary-blue-border: #bfdbfe;
  
  --dark-navy: #0b132b;
  --dark-navy-card: #1c2541;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  --bg-page: #f7f9ff;
  --bg-card: #ffffff;
  --bg-subtle-blue: #f0f6ff;
  --bg-banner: #eff6ff;

  --border-light: #e2e8f0;
  --border-card: #edf2f7;
  --border-blue: #dbeafe;

  /* Tag Badges */
  --badge-green-bg: #ecfdf5;
  --badge-green-text: #059669;
  --badge-purple-bg: #f5f3ff;
  --badge-purple-text: #7c3aed;
  --badge-blue-bg: #eff6ff;
  --badge-blue-text: #2563eb;
  --badge-orange-bg: #fff7ed;
  --badge-orange-text: #ea580c;
  --badge-teal-bg: #f0fdfa;
  --badge-teal-text: #0d9488;

  /* Sizing & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --container-max: 1100px;
  --header-height: 72px;

  --shadow-card: 0 2px 8px -2px rgba(15, 23, 42, 0.05), 0 1px 3px 0 rgba(15, 23, 42, 0.03);
  --shadow-card-hover: 0 10px 25px -5px rgba(37, 99, 235, 0.08), 0 4px 10px -3px rgba(15, 23, 42, 0.04);
  
  --font-stack: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-main);
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: all 0.15s ease;
}

a:hover {
  color: var(--primary-blue-hover);
  text-decoration: none;
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 2.75rem);
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
}

h1 .highlight-blue {
  color: var(--primary-blue);
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.65rem);
  letter-spacing: -0.02em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 0.975rem;
}

strong {
  color: var(--text-main);
  font-weight: 600;
}

ol, ul {
  padding-left: 1.4rem;
  margin-bottom: 1.25rem;
}

li {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

li strong {
  color: var(--text-main);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.site-main {
  flex: 1;
  padding-top: 1.5rem;
  padding-bottom: 4rem;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  margin-bottom: 1.5rem;
}

.breadcrumb-list {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none !important;
  list-style-type: none !important;
  padding: 0 !important;
  margin: 0 !important;
  font-size: 0.875rem;
}

.breadcrumb-item {
  display: inline-flex !important;
  align-items: center;
  list-style: none !important;
  list-style-type: none !important;
  color: var(--text-muted);
}

.breadcrumb-item a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumb-item a:hover {
  color: var(--primary-blue-hover);
  text-decoration: underline;
}

.breadcrumb-item[aria-current="page"] {
  color: var(--text-main);
  font-weight: 600;
}

.breadcrumb-separator {
  list-style: none !important;
  list-style-type: none !important;
  color: var(--text-subtle);
  font-size: 0.8rem;
  user-select: none;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.015em;
}

.brand-icon-box {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
  overflow: hidden;
  flex-shrink: 0;
}

.brand-icon-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--primary-blue);
  background-color: var(--primary-blue-light);
}

.nav-link.active {
  color: var(--primary-blue);
  background-color: var(--primary-blue-light);
  font-weight: 600;
}

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

.settings-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.settings-btn:hover {
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.45rem;
  cursor: pointer;
  color: var(--text-main);
}

/* ==========================================================================
   Hero Section (Split 2-Column: Content + 3D Illustration)
   ========================================================================== */
.hero-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 2.5rem;
  padding: 2.5rem 0 2rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
  border: 1px solid var(--primary-blue-border);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  width: fit-content;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.75rem;
  max-width: 540px;
}

.hero-features-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.feature-icon-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-text-group {
  display: flex;
  flex-direction: column;
}

.feature-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.feature-desc {
  font-size: 0.75rem;
  color: var(--text-subtle);
  line-height: 1.2;
}

.hero-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-illustration img,
.hero-illustration svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 15px 30px rgba(37, 99, 235, 0.12));
}

/* ==========================================================================
   Section Header Styling
   ========================================================================== */
.section-header {
  margin-top: 2rem;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.35rem;
}

.section-icon-badge {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.section-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ==========================================================================
   Tool Cards Grid (Core Tools)
   ========================================================================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  position: relative;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-blue-border);
  box-shadow: var(--shadow-card-hover);
  text-decoration: none;
}

.tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.tool-icon-square {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
}

.icon-purple { background-color: #f3e8ff; color: #7e22ce; }
.icon-indigo { background-color: #e0e7ff; color: #4338ca; }
.icon-blue   { background-color: #dbeafe; color: #1d4ed8; }
.icon-orange { background-color: #ffedd5; color: #c2410c; }
.icon-teal   { background-color: #ccfbf1; color: #0f766e; }

.tool-badge-pill {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.badge-green  { background-color: var(--badge-green-bg); color: var(--badge-green-text); }
.badge-purple { background-color: var(--badge-purple-bg); color: var(--badge-purple-text); }
.badge-blue   { background-color: var(--badge-blue-bg); color: var(--badge-blue-text); }
.badge-orange { background-color: var(--badge-orange-bg); color: var(--badge-orange-text); }
.badge-teal   { background-color: var(--badge-teal-bg); color: var(--badge-teal-text); }

.tool-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.45rem;
}

.tool-card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.tool-card-cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   Popular CGPA Quick Lookups Container (Blue Soft Panel)
   ========================================================================== */
.quick-lookups-panel {
  background-color: #f0f6ff;
  border: 1px solid #dbeafe;
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  margin: 2.5rem 0;
}

.quick-lookups-panel .section-title {
  margin-bottom: 0.25rem;
}

.quick-lookups-panel .section-desc {
  margin-bottom: 1.25rem;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

.value-pill {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 0.75rem 0.5rem;
  text-align: center;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: all 0.15s ease;
}

.value-pill:hover {
  transform: translateY(-2px);
  border-color: var(--primary-blue);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
  text-decoration: none;
}

.value-pill .val-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
}

.value-pill .val-pct {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary-blue);
}

/* ==========================================================================
   Promotional Banner / Google AdSense Space
   ========================================================================== */
.ad-slot-wrapper {
  margin: 2rem 0;
  text-align: center;
}

.ad-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-subtle);
  display: block;
  margin-bottom: 0.4rem;
}

.ad-slot {
  min-height: 90px;
  background-color: #ffffff;
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.8rem;
  font-weight: 500;
  max-width: 728px;
  margin: 0 auto;
}

.ad-slot-incontent {
  min-height: 250px;
  max-width: 336px;
}

.promo-banner-card {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  text-align: left;
}

.promo-banner-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.promo-icon-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #ffffff;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.12);
}

.promo-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.15rem;
}

.promo-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.btn-promo {
  background-color: var(--primary-blue);
  color: #ffffff;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

.btn-promo:hover {
  background-color: var(--primary-blue-hover);
  color: #ffffff;
}

/* ==========================================================================
   Content Article Sections
   ========================================================================== */
.content-section {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

.content-section h2 {
  margin-top: 0;
}

.content-section h3 {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

/* Comparison Table (Light Blue Header) */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.25rem 0 1.5rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

thead th {
  background-color: #eff6ff;
  color: #1e3a8a;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #bfdbfe;
  white-space: nowrap;
}

tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-muted);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background-color: #fbfcfe;
}

/* FAQ Accordion (Clean Styled Cards with Blue Header) */
.faq-section {
  margin-top: 2rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1rem;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.15s ease;
}

.faq-item[open] {
  border-color: var(--primary-blue-border);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.05);
}

.faq-question {
  padding: 0.95rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--primary-blue);
  transition: transform 0.15s ease;
}

.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ==========================================================================
   Interactive Calculator Card & Inner Tools
   ========================================================================== */
.calculator-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: 2rem;
}

.calculator-card-header {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.calc-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.calc-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.calc-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.35rem;
  display: block;
}

.form-group .form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  display: block;
}

.form-control {
  width: 100%;
  height: 48px;
  padding: 0.65rem 1rem;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  -webkit-appearance: none;
  appearance: none;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

/* SSLC Subject Row Component */
.subject-header-grid {
  display: grid;
  grid-template-columns: 1fr 110px 110px 42px;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  padding-bottom: 0.35rem;
}

.subject-row {
  display: grid;
  grid-template-columns: 1fr 110px 110px 42px;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.65rem;
}

.btn-remove-row {
  width: 42px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: #fee2e2;
  color: #dc2626;
  border: 1px solid #fecaca;
  font-size: 1.35rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.btn-remove-row:hover {
  background-color: #fca5a5;
  color: #991b1b;
}

/* Cash Denomination Grid */
.denom-header-grid {
  display: grid;
  grid-template-columns: 90px 1fr 130px;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  padding-bottom: 0.35rem;
}

.denom-grid {
  display: grid;
  grid-template-columns: 90px 1fr 130px;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.denom-tag {
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.65rem 0.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--primary-blue-border);
}

.denom-subtotal {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  text-align: right;
  font-feature-settings: "tnum";
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  height: 44px;
  padding: 0 1.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  user-select: none;
}

.btn-primary {
  background-color: var(--primary-blue);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-blue-hover);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-outline {
  background-color: #ffffff;
  border-color: var(--border-light);
  color: var(--text-muted);
}

.btn-outline:hover {
  background-color: var(--primary-blue-light);
  border-color: var(--primary-blue-border);
  color: var(--primary-blue);
}

.btn-sm {
  height: 36px;
  padding: 0 0.85rem;
  font-size: 0.85rem;
}

/* Calculator Result Panel */
.calc-result-panel {
  margin-top: 1.25rem;
  padding: 1.5rem;
  background-color: #f8faff;
  border: 1px solid var(--border-blue);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-blue);
}

.result-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-blue);
  margin-bottom: 0.25rem;
}

.result-value {
  font-size: clamp(2.2rem, 5vw, 3.25rem);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
  font-feature-settings: "tnum";
}

.result-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
}

.result-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  background-color: #ffffff;
  padding: 0.75rem 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid #dbeafe;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.04);
}

.result-stat-label {
  font-size: 0.725rem;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
}

.result-stat-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
  line-height: 1.35;
}

.result-copy-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

.copy-feedback {
  font-size: 0.8rem;
  color: #059669;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.copy-feedback.show {
  opacity: 1;
}

/* Disclaimers & Notes */
.disclaimer-box {
  background-color: #fefce8;
  border-left: 3px solid #eab308;
  padding: 0.85rem 1.1rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.85rem;
  color: #854d0e;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.disclaimer-box strong {
  color: #854d0e;
}

/* Formula Box */
.formula-box {
  background-color: #f8faff;
  border: 1px solid var(--border-blue);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  margin: 1.25rem 0;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--primary-blue);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow-x: auto;
}

/* Exact Value Hero Display */
.exact-value-hero {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 2rem;
  text-align: center;
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.25);
}

.exact-value-hero h2 {
  color: #bfdbfe;
  font-size: 0.95rem;
  border-bottom: none;
  margin: 0 0 0.5rem 0;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  justify-content: center;
}

.exact-hero-number {
  font-size: clamp(2.75rem, 7vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
  color: #ffffff;
}

.exact-hero-subtitle {
  color: #dbeafe;
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* ==========================================================================
   Footer (Exact Dark Navy Styling matching image)
   ========================================================================== */
.site-footer {
  background-color: var(--dark-navy);
  color: #94a3b8;
  padding-top: 3.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid #1e293b;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.1fr 1fr 0.9fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand .brand-link {
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.85rem;
  max-width: 320px;
  line-height: 1.6;
}

.footer-nav-col h4 {
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.85rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #ffffff;
}

/* Footer Privacy / Security Card Box */
.footer-badge-box {
  background: var(--dark-navy-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.45rem;
}

.footer-badge-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.25rem;
}

.footer-badge-title {
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
}

.footer-badge-sub {
  color: #94a3b8;
  font-size: 0.75rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: #64748b;
}

.footer-bottom p {
  margin-bottom: 0;
  color: #64748b;
  font-size: 0.78rem;
}

/* ==========================================================================
   Comprehensive Mobile & Tablet Responsive Engine
   ========================================================================== */

@media (max-width: 990px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
    padding: 1.5rem 0;
  }

  .hero-content {
    align-items: center;
  }

  .hero-pill-badge {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-features-row {
    justify-content: center;
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.15rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .header-inner {
    position: relative;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: -1rem;
    right: -1rem;
    width: calc(100% + 2rem);
    background-color: #ffffff;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem 1.25rem;
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    z-index: 9999;
    gap: 0.35rem;
  }

  .nav-menu.open {
    display: flex !important;
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
  }

  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .footer-badge-box {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .promo-banner-card {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    padding: 1.25rem 1rem;
    gap: 1rem;
  }

  .promo-banner-left {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
  }

  .btn-promo {
    width: 100%;
    text-align: center;
    display: block;
    box-sizing: border-box;
  }

  .hero-illustration {
    width: 100%;
    max-width: 320px;
    margin: 1.5rem auto 0;
  }

  .hero-illustration svg {
    width: 100%;
    height: auto;
  }

  .table-responsive table {
    min-width: 540px;
  }

  .ad-slot {
    min-height: 60px;
    font-size: 0.75rem;
    padding: 0.5rem;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.85rem !important;
    line-height: 1.25;
  }

  .hide-mobile {
    display: none !important;
  }

  .hero-features-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    background: #ffffff;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-blue);
    box-shadow: var(--shadow-card);
  }

  .hero-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-align: left;
  }

  .quick-lookups-panel {
    padding: 1.25rem 0.85rem;
    margin: 1.75rem 0;
    border-radius: var(--radius-lg);
  }

  .values-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.5rem;
  }

  .value-pill {
    padding: 0.6rem 0.35rem;
  }

  .value-pill .val-title {
    font-size: 0.8rem;
  }

  .value-pill .val-pct {
    font-size: 0.85rem;
  }

  .content-section {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
  }

  .content-section h2 {
    font-size: 1.2rem;
  }

  .content-section h3 {
    font-size: 1.05rem;
  }

  .faq-question {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
  }

  .faq-answer {
    padding: 0 1rem 1rem;
    font-size: 0.875rem;
  }

  /* Form & Calculator Responsive Controls */
  .calculator-card {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
  }

  .calc-title {
    font-size: 1.2rem;
  }

  .form-row {
    grid-template-columns: 1fr !important;
    gap: 0.85rem;
  }

  .form-control {
    font-size: 16px !important; /* Prevents auto-zoom on iOS */
    height: 46px;
  }

  .calc-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.5rem;
  }

  .calc-actions .btn {
    width: auto;
  }

  .calc-result-panel {
    padding: 1.25rem 1rem;
    gap: 0.85rem;
  }

  .result-main {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border-blue);
  }

  .result-value {
    font-size: 2.25rem;
    line-height: 1;
  }

  .result-copy-wrap {
    width: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
  }

  .result-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-top: none;
    padding-top: 0;
  }

  .result-stat {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    background-color: #ffffff;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid #dbeafe;
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.04);
  }

  .result-stat-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--primary-blue);
  }

  .result-stat-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    word-break: break-word;
  }

  /* SSLC Subjects Card Row on Mobile */
  .subject-header-grid {
    display: none;
  }

  .subject-row {
    grid-template-columns: 1fr 1fr 42px;
    gap: 0.5rem;
    background-color: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.65rem;
    margin-bottom: 0.65rem;
  }

  .subject-row .sub-name {
    grid-column: 1 / -2;
  }

  .subject-row .btn-remove-row {
    grid-column: -2 / -1;
    justify-self: end;
  }

  .subject-row .sub-obtained {
    grid-column: 1 / 2;
  }

  .subject-row .sub-max {
    grid-column: 2 / 3;
  }

  /* Cash Denomination Grid on Mobile */
  .denom-header-grid {
    grid-template-columns: 65px 1fr 90px;
    gap: 0.4rem;
    font-size: 0.75rem;
  }

  .denom-grid {
    grid-template-columns: 65px 1fr 90px;
    gap: 0.4rem;
  }

  .denom-tag {
    font-size: 0.85rem;
    padding: 0.45rem 0.25rem;
  }

  .denom-subtotal {
    font-size: 0.85rem;
  }
}

@media (max-width: 380px) {
  .values-grid {
    grid-template-columns: 1fr !important;
  }

  .hero-pill-badge {
    font-size: 0.725rem;
    padding: 0.3rem 0.65rem;
  }

  .brand-link {
    font-size: 1.05rem;
  }
}

/* University Cards Grid */
.univ-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.univ-card {
  background: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  color: var(--text-main);
  position: relative;
}

.univ-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-blue-border);
  box-shadow: var(--shadow-card-hover);
}

.univ-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.univ-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--primary-blue-light);
  color: var(--primary-blue);
}

.univ-arrow {
  color: var(--text-subtle);
  font-size: 1.1rem;
  transition: transform 0.2s ease, color 0.2s ease;
}

.univ-card:hover .univ-arrow {
  transform: translateX(3px);
  color: var(--primary-blue);
}

.univ-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.univ-formula {
  margin-bottom: 0.85rem;
}

.univ-formula code {
  background: #f1f5f9;
  color: #334155;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  font-size: 0.825rem;
  font-family: var(--font-mono);
}

.univ-cta {
  margin-top: auto;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--primary-blue);
}

/* ==========================================================================
   Multi-Scale Calculator Switcher & Deep Content Styles
   ========================================================================== */
.scale-switcher {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  background: #f1f5f9;
  padding: 0.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.scale-tab-btn {
  flex: 1 1 auto;
  min-width: 140px;
  padding: 0.65rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
}

.scale-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.6);
}

.scale-tab-btn.active {
  background: #ffffff;
  color: var(--primary-blue);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

/* Table of Contents Box */
.toc-box {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--primary-blue);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}

.toc-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.5rem 1.25rem;
  padding-left: 1.25rem;
  margin: 0;
}

.toc-list li a {
  color: var(--primary-blue);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.toc-list li a:hover {
  text-decoration: underline;
  color: var(--primary-blue-hover);
}

/* Strategy Cards Grid */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.strategy-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.strategy-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--primary-blue-border);
}

.strategy-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary-blue-light);
  color: var(--primary-blue);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 50%;
  margin-bottom: 0.75rem;
}

.strategy-title {
  font-size: 1.025rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.strategy-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Academic Standing Badges in Tables */
.standing-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-distinction {
  background: #ecfdf5;
  color: #065f46;
}

.badge-first {
  background: #eff6ff;
  color: #1e40af;
}

.badge-second {
  background: #fefce8;
  color: #854d0e;
}

.badge-pass {
  background: #f8fafc;
  color: #475569;
}