/* =========================================================
   RESET & BASE
========================================================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: #0B1E3A;
  color: #E6EDF3;
  min-height: 100vh;
  line-height: 1.4;
}

/* =========================================================
   HEADER
========================================================= */
/*.app-header {R
  background: linear-gradient(180deg, #003a75, #001b3a);
  text-align: center;
  padding: 26px 16px;
}*/

/*.app-header {
  background:
    linear-gradient(
      135deg,
      #062a4d 0%,
      #0b3f78 45%,
      #0e5aa7 100%
    );
   text-align: center;
  color: #ffffff;
} */

.app-header {
  background: linear-gradient(
    180deg,
    #0b3a66 0%,
    #093357 100%
  );
  color: #ffffff;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 2.75rem;
}

.app-header h1 {
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-shadow:
    0 2px 4px rgba(0, 0, 0, 0.35);
}

.subtitle {
  margin-top: 6px;
  font-size: clamp(12px, 2.5vw, 14px);
  color: #c7d6ea;
}

/* =========================================================
   LAYOUT
========================================================= */
.container {
  max-width: 1200px;
  margin: 32px auto;
  padding: 0 20px;
}

/* Main two-column layout */
.main-grid {
  display: grid;
  gap: 24px;
}

/* Desktop layout */
@media (min-width: 1024px) {
  .main-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

.card {
  background: #141a24;
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.05);
}

.card h2 {
  margin-bottom: 14px;
  font-size: 18px;
}

/* =========================================================
   MODE TABS
========================================================= */
.input-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.tab {
  flex: 1 1 72px;
  padding: 10px 0;
  background: #242c3a;
  border: none;
  border-radius: 8px;
  color: #cfd8e3;
  font-weight: 600;
  cursor: pointer;
}

.tab.active {
  background: #007acc;
  color: #ffffff;
}

/* =========================================================
   HELP BAR
========================================================= */
.tab-help {
  background: #0f2a44;
  color: #b9dbff;
  border-left: 4px solid #2da8ff;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 14px;
}

/* =========================================================
   INPUT GRID
========================================================= */
.grid-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
}

.field.full {
  grid-column: 1 / -1;
}

label {
  font-size: 13px;
  color: #b8c2d4;
  margin-bottom: 4px;
}

input,
select {
  background: #1e2533;
  border: 1px solid #2b3445;
  border-radius: 8px;
  padding: 11px;
  color: #ffffff;
  font-size: 14px;
}

input:focus,
select:focus {
  outline: none;
  border-color: #3fa9ff;
}

/* =========================================================
   PRIMARY BUTTON
========================================================= */
.primary {
  margin-top: 10px;
  width: 100%;
  padding: 14px;
  background: #007acc;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
}

.primary:hover {
  background: #005fa3;
}

/* =========================================================
   RESULTS
========================================================= */
.results-table {
  margin-top: 10px;
  font-size: 14px;
}

.loading {
  text-align: center;
  color: #9fb0c9;
  margin-bottom: 10px;
}

.hidden {
  visibility: hidden;
  height: 0;
}



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

/* Tablets */
@media (min-width: 600px) {
  .grid-form {
    grid-template-columns: 1fr 1fr;
  }
}

/* Laptops / Desktops */
@media (min-width: 1024px) {
  .container {
    grid-template-columns: 1fr 1fr;
  }

  .grid-form {
    grid-template-columns: 1fr 1fr;
  }
    .brand-logo {
    height: 100px;
  }

  .brand-text h1 {
    font-size: 2.55rem;
  } 
}

/* ============================================================
   RESULTS CARD – VISUAL UPGRADE
   ============================================================ */

#resultsTable {
  background: linear-gradient(
    180deg,
    rgba(255,255,255,0.04),
    rgba(255,255,255,0.015)
  );
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.05),
    0 12px 30px rgba(0,0,0,0.35);
}

/*#resultsTable {
  min-height: 380px;
}

/* ============================================================
   PHASE BADGE
   ============================================================ */

.phase-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  margin-bottom: 1rem;

  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;

  border-radius: 999px;
  background: linear-gradient(
    135deg,
    rgba(0,160,255,0.25),
    rgba(0,100,200,0.35)
  );
  color: #eaf6ff;

  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.12),
    0 6px 18px rgba(0,0,0,0.35);
}

/* ============================================================
   RESULT ACTION BUTTONS
   ============================================================ */

.result-actions {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.result-actions button {
  padding: 6px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;

  border-radius: 8px;
  border: none;
  cursor: pointer;

  background: linear-gradient(
    180deg,
    #0d8cff,
    #006fd6
  );
  color: #ffffff;

  box-shadow:
    0 6px 14px rgba(0,0,0,0.35),
    inset 0 1px 0 rgba(255,255,255,0.25);

  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.result-actions button:hover {
  transform: translateY(-1px);
  box-shadow:
    0 10px 20px rgba(0,0,0,0.45),
    inset 0 1px 0 rgba(255,255,255,0.3);
}

.result-actions button:active {
  transform: translateY(0);
  box-shadow:
    0 5px 12px rgba(0,0,0,0.35),
    inset 0 1px 0 rgba(255,255,255,0.2);
}

/* ============================================================
   RESULTS TABLE – CLEAN & TECHNICAL
   ============================================================ */

.results-clean {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.results-clean thead th {
  text-align: left;
  font-weight: 600;
  opacity: 0.75;
  padding: 8px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.18);
}

.results-clean tbody tr {
  transition: background 0.15s ease;
}

.results-clean tbody tr:hover {
  background: rgba(255,255,255,0.04);
}

.results-clean td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* Value column – numeric emphasis */
.results-clean td:nth-child(2) {
  text-align: right;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Unit column – de-emphasized */
.results-clean td:nth-child(3) {
  opacity: 0.65;
  white-space: nowrap;
}


/* =========================================================
   INPUT PAIR GROUPING (UI UPGRADE)
========================================================= */

.input-groups {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}

/* Individual group box */
.input-group {
  background: #0f1520;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 12px;
}

/* Group label */
.group-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: #9fb0c9;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

/* Ensure tabs inside groups behave well */
.input-group .input-tabs {
  margin-bottom: 0;
}

/* Tablet and up: side-by-side groups */
@media (min-width: 600px) {
  .input-groups {
    grid-template-columns: 1fr 1fr;
  }
}

/* =========================================================
   Input group title fine-tuning (prevent wrapping)
========================================================= */

.group-title {
  font-size: 0.8rem;        /* was ~0.85rem */
  line-height: 1.2;
  white-space: nowrap;     /* keep on one line */
}

.separator {
  margin: 0 6px;
  color: #6b7280;
}

.learn-more-card {
  margin-top: 32px;
  padding: 24px 28px;
  background: linear-gradient(
    135deg,
    #0f172a,
    #111827
  );
  border: 1px solid #1f2937;
  border-radius: 10px;
}

.learn-more-card h3 {
  margin: 0 0 8px;
  font-size: 1.25rem;
  color: #f9fafb;
}

.learn-more-card p {
  margin: 0 0 16px;
  font-size: 0.95rem;
  color: #cbd5f5;
  max-width: 720px;
}

.learn-more-button {
  display: inline-block;
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #0b1220;
  background: #60a5fa;
  border-radius: 6px;
  text-decoration: none;
}

.learn-more-button:hover {
  background: #3b82f6;
}

.explore-more-card {
  margin-top: 40px;
  padding: 26px 30px;
  background: linear-gradient(135deg, #0f172a, #111827);
  border: 1px solid #1f2937;
  border-radius: 10px;
}

.explore-more-card h3 {
  margin: 0 0 10px;
  font-size: 1.3rem;
  color: #f9fafb;
}

.explore-more-card p {
  margin: 0 0 18px;
  font-size: 0.95rem;
  color: #cbd5f5;
  max-width: 720px;
}

.explore-button {
  display: inline-block;
  padding: 11px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #0b1220;
  background: #60a5fa;
  border-radius: 6px;
  text-decoration: none;
}

.explore-button:hover {
  background: #3b82f6;
}


.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 24px;
  max-width: 1400px;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: 1fr;
  }

}

.ad-below-results {
  margin: 32px 0;
  padding-top: 16px;
  border-top: 1px solid #1f2937;
  text-align: center;
}

.ad-label {
  font-size: 0.7rem;
  color: #9ca3af;
  margin-bottom: 6px;
}

.learning-hub-card {
  margin-top: 40px;
  padding: 28px 32px;
  background: linear-gradient(135deg, #0f172a, #111827);
  border: 1px solid #1f2937;
  border-radius: 10px;
}

.learning-hub-card h3 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  color: #f9fafb;
}

.learning-hub-card p {
  margin: 0 0 18px;
  font-size: 0.95rem;
  color: #cbd5f5;
  max-width: 900px;
}

.learning-hub-button {
  display: inline-block;
  padding: 12px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #0b1220;
  background: #60a5fa;
  border-radius: 6px;
  text-decoration: none;
}

.learning-hub-button:hover {
  background: #3b82f6;
}

.tooltip-icon {
  position: relative;
  display: inline-block;
  margin-left: 6px;
  font-size: 0.85em;
  color: #9aa4b2;
  cursor: pointer;
}

.tooltip-icon:focus .tooltip,
.tooltip-icon:hover .tooltip {
  display: block;
}

.tooltip {
  display: none;
  position: absolute;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  background: #1f2937;
  color: #ffffff;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  line-height: 1.3;
  white-space: nowrap;
  z-index: 20;
}

.helper-text {
  margin-top: 4px;
  font-size: 0.75rem;
  color: #8b97a8;
}

.tooltip-icon:hover .tooltip,
.tooltip-icon:focus .tooltip,
.tooltip-icon.active .tooltip {
  display: block;
}

/* ===============================
   HEADER BRANDING
================================ */

.brand {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: none !important;
  border: none !important; 
}

.brand-logo {
   display: block;
  height: 90px;        /* Adjust if you want it bigger/smaller */
  width: auto;
   flex-shrink: 0;
   background: white;
   border: none;
   padding: 0;
   margin: 0;
   outline: 1px solid blue;
  /* Subtle polish (optional but recommended) */
  filter: 
      drop-shadow(0 1px 2px rgba(255, 255, 255, 0.18));
      drop-shadow(0 3px 8px rgba(0, 0, 0, 0.35));
}

.brand-text h1 {
  margin: 0;
  font-size: 2.35rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.15px;

  color: #ffffff;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.capability-badge {
  display: inline-block;
  margin-top: 0.6rem;
  padding: 0.45rem 0.9rem;

  font-size: 0.95rem;
  font-weight: 500;
  color: #e0f2fe;

  background: linear-gradient(
    90deg,
    rgba(14, 165, 233, 0.35),
    rgba(59, 130, 246, 0.35)
  );

  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.capability-line {
  margin-top: 0.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: #cfe3f7;

  /* subtle divider feel */
  padding-left: 0.75rem;
  border-left: 3px solid rgba(255, 255, 255, 0.25);
}

/* ===============================
   SCHEMATIC PANEL
=============================== */

.schematic-box {
  height: 260px;
  background: linear-gradient(
    135deg,
    #0f172a,
    #111827
  );
  border: 1px solid #1f2937;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9fb0c9;
  font-weight: 500;
  text-align: center;
  padding: 16px;
  margin-bottom: 20px;
}

.schematic-subsection h3 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: #cbd5f5;
}

/* ===============================
   RESULT HIGHLIGHT
=============================== */

.result-highlight {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px;
  margin-bottom: 22px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;

  background: linear-gradient(
    135deg,
    rgba(14,165,233,0.2),
    rgba(59,130,246,0.2)
  );

  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
}

.result-label {
  font-size: 0.95rem;
  color: #cbd5f5;
}

.result-value {
  font-size: 2.2rem;
  font-weight: 600;
  color: #ffffff;
}

.result-unit {
  font-size: 1rem;
  color: #9fb0c9;
}

.result-section h3 {
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: #cbd5f5;
}

/* Mobile improvement */
@media (max-width: 600px) {
  .result-highlight {
    flex-direction: column;
    align-items: flex-start;
  }
}

.result-highlight:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.35);
}
/* ===============================
   MODE BAR LAYOUT FIX
=============================== */

.mode-wrapper {
  grid-column: 1 / -1;
  margin-bottom: 20px;
}

.mode-wrapper h2 {
  margin-bottom: 12px;
  font-size: 1rem;
  color: #cbd5f5;
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.results-clean {
  width: 100%;
  border-collapse: collapse;
}

.results-clean th {
  text-align: left;
  border-bottom: 2px solid #3b82f6;
  padding: 6px 0;
}

.results-clean td {
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.results-clean td:nth-child(2) {
  text-align: right;
  font-weight: 500;
}

.results-clean td:nth-child(3) {
  text-align: right;
  opacity: 0.7;
}

/* =========================================================
   MOBILE OPTIMIZATION LAYER
   Water & Steam Properties Calculator
   (SAFE – Desktop unaffected)
========================================================= */

@media (max-width: 600px) {

  /* ================= HEADER ================= */

  .header-inner {
    padding: 1.2rem 1rem;
  }

  .brand {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }

  .brand-logo {
    height: 65px;
  }

  .brand-text h1 {
    font-size: 1.5rem;
    line-height: 1.25;
  }

  .capability-line {
    font-size: 0.85rem;
    padding-left: 0;
    border-left: none;
  }

  /* ================= LAYOUT ================= */

  .container {
    padding: 0 12px;
    margin: 18px auto;
  }

  .card {
    padding: 16px;
  }

  /* ================= MODE TABS ================= */

  .input-tabs {
    gap: 6px;
  }

  .tab {
    font-size: 0.85rem;
    padding: 9px 0;
  }

  /* ================= INPUT GROUPS ================= */

  .input-group {
    padding: 14px;
  }

  .group-title {
    font-size: 0.78rem;
    white-space: normal; /* prevent overflow */
  }

  /* ================= FORM FIELDS ================= */

  input,
  select {
    font-size: 0.95rem;
    padding: 12px 14px;
  }

  label {
    font-size: 0.85rem;
  }

  .helper-text {
    font-size: 0.75rem;
  }

  /* ================= RESULTS ================= */

  .result-highlight {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 16px;
  }

  .result-value {
    font-size: 2rem;
  }

  .result-unit {
    font-size: 0.9rem;
  }

   

  /* ================= RESULT ACTION BUTTONS ================= */

  .result-actions {
    flex-direction: column;
    gap: 8px;
  }

  .result-actions button {
    width: 100%;
    font-size: 0.8rem;
  }

  /* ================= SCHEMATIC PANEL ================= */

  .schematic-box {
    height: 200px;
    font-size: 0.85rem;
  }

  /* ================= LEARN MORE / EXPLORE CARDS ================= */

  .learn-more-card,
  .explore-more-card,
  .learning-hub-card {
    padding: 20px;
  }

  .learn-more-card h3,
  .explore-more-card h3,
  .learning-hub-card h3 {
    font-size: 1.1rem;
  }

  .learn-more-card p,
  .explore-more-card p,
  .learning-hub-card p {
    font-size: 0.9rem;
  }

  /* ================= FOOTER ================= */

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
  }

}

.seo-intro-section {
  padding: 36px 0 18px 0;
}

.seo-intro-section .container-learning {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.seo-intro-section h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.seo-intro-section p {
  max-width: 850px;
  line-height: 1.65;
  opacity: 0.95;
}

.moody-section {
  margin-top: 28px;
}

.mode-group {
  grid-column: 1 / -1;
}

.results-clean {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.results-clean thead th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid #3b82f6;
  opacity: 0.85;
}

.results-clean td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.results-clean td:nth-child(2) {
  text-align: right;
  font-family: "JetBrains Mono", monospace;
}

.results-clean td:nth-child(3) {
  text-align: right;
  opacity: 0.6;
}


/* ===============================
   Global Footer
================================ */

.site-footer {
  margin-top: 60px;
  padding: 30px 20px;
  background: #121212;
  border-top: 1px solid #2a2a2a;
}

.footer-inner {
  max-width: 1100px;
  margin: auto;
  text-align: center;
}

.footer-disclaimer {
  font-size: 0.85rem;
  color: #ffffff;
  text-align: center;
  margin-bottom: 18px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 18px;
}

.footer-links a {
  text-decoration: none;
  font-size: 0.9rem;
  color: #b3d4ff;
  transition: color 0.2s ease;
}

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

.footer-copy {
  font-size: 0.8rem;
  color: #ffffff;
  text-align: center;
}

/* Mobile */
@media (max-width: 600px) {
  .footer-links {
    gap: 12px;
  }

  .footer-disclaimer {
    font-size: 0.8rem;
  }
}


.container-learning {
      max-width: 900px;
      margin: 0 auto;
      padding: 48px 20px;
    }

h1 {
      font-size: 1.8rem;
      margin-bottom: 16px;
      color: #f9fafb;
    }

    h2 {
      font-size: 1.3rem;
      margin-top: 40px;
      color: #d1d5db;
    }

    h3 {
      font-size: 1.05rem;
      margin-top: 24px;
      color: #cbd5f5;
    }

p {
      margin: 12px 0;
      color: #cbd5f5;
    }

    ul {
      margin: 12px 0 12px 20px;
      color: #cbd5f5;
    }

    li {
      margin: 6px 0;
    }

    a {
      color: #60a5fa;
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

@media (min-width: 1100px) {
  .container {
    grid-template-columns: 1.3fr 0.9fr;
  }
}