/* ============================================================================
   Ferment.bot — modern design system (2026 refresh)
   Palette is UNCHANGED. Only shades of the existing navy are derived for
   surface elevation. Identity colors:
     navy   #01011a   pink #ff48c4   yellow #f3ea5f
     blue   #2bd1fc   purple #c04df9  red  #ff3f3f
   ============================================================================ */

/* ---- Fonts (bundled locally in /fonts — no external dependency) ---------- */
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueLight.otf')     format('opentype'); font-weight:300; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueRegular.otf')   format('opentype'); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueMedium.otf')    format('opentype'); font-weight:500; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueSemibold.otf')  format('opentype'); font-weight:600; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueBold.otf')      format('opentype'); font-weight:700; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueExtrabold.otf') format('opentype'); font-weight:800; font-style:normal; font-display:swap; }
@font-face { font-family:'Seb Neue'; src:url('../fonts/SebneueHeavy.otf')     format('opentype'); font-weight:900; font-style:normal; font-display:swap; }

/* Legacy pixel font kept available (used only for optional retro accents) */
@font-face {
    font-family:'10Pixel';
    src:url('../fonts/10Pixel-Bold.otf') format('opentype'),
        url('../fonts/10Pixel-Bold.ttf') format('truetype');
    font-weight:normal; font-style:normal; font-display:swap;
}

/* ---- Design tokens ------------------------------------------------------- */
:root {
    /* Brand palette (unchanged) */
    --navy:      #01011a;
    --pink:      #ff48c4;
    --yellow:    #f3ea5f;
    --blue:      #2bd1fc;
    --purple:    #c04df9;
    --red:       #ff3f3f;

    /* Elevation — same navy hue, progressively lighter */
    --surface-1: #070722;
    --surface-2: #0c0c2e;
    --surface-3: #13133d;

    /* Neutral text (professional, readable) */
    --text:      rgba(238, 238, 255, 0.90);
    --text-soft: rgba(238, 238, 255, 0.64);
    --text-dim:  rgba(238, 238, 255, 0.42);

    /* Lines & accents */
    --border:        rgba(255, 72, 196, 0.22);
    --border-soft:   rgba(238, 238, 255, 0.10);
    --border-strong: rgba(255, 72, 196, 0.55);

    --glow-pink: 0 0 0 1px rgba(255,72,196,.35), 0 8px 30px rgba(255,72,196,.18);
    --shadow-1:  0 1px 2px rgba(0,0,0,.4);
    --shadow-2:  0 10px 30px rgba(0,0,0,.45);
    --shadow-3:  0 24px 60px rgba(0,0,0,.55);

    --grad-brand: linear-gradient(100deg, var(--pink) 0%, var(--purple) 55%, var(--blue) 100%);
    --grad-warm:  linear-gradient(100deg, var(--yellow) 0%, var(--pink) 100%);

    --radius:    18px;
    --radius-sm: 12px;
    --radius-pill: 999px;
    --maxw: 1200px;

    --font-display: 'Seb Neue', 'Uni Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-body:    'Seb Neue', 'Uni Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;

    --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset & base -------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    color: var(--text);
    background-color: var(--navy);
    max-width: 100%;
    overflow-x: hidden;
    min-height: 100%;
    position: relative;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* Ambient background glows in-palette (fixed, non-interactive) */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(60vw 60vw at 82% -10%, rgba(255,72,196,.14), transparent 60%),
        radial-gradient(55vw 55vw at -10% 8%, rgba(43,209,252,.10), transparent 60%),
        radial-gradient(70vw 70vw at 50% 120%, rgba(192,77,249,.12), transparent 60%);
}
body > * { position: relative; z-index: 1; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--yellow);
}

a { color: var(--pink); text-decoration: none; }

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

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* ============================================================================
   INDEX — hero header
   ============================================================================ */
.page-header {
    text-align: center;
    padding: 7rem 1.5rem 3rem;
    background: transparent;
    color: var(--yellow);
}

.page-header h1 {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(2.4rem, 6vw, 4.25rem);
    letter-spacing: -0.03em;
    margin: 0 auto 1rem;
    max-width: 16ch;
    color: var(--yellow);
}

.page-header h4 {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1.05rem, 2.2vw, 1.35rem);
    color: var(--text-soft);
    margin: 0 auto;
    max-width: 46ch;
}

/* ============================================================================
   INDEX — feature cards (main-flex layout)
   ============================================================================ */
main {
    width: 100%;
    position: relative;
    z-index: 2;
    background-color: transparent;
    padding: 20px 0 40px;
}

.main-flex-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    padding: 1rem 1.25rem 3rem;
    gap: 1.5rem;
    max-width: var(--maxw);
    margin: 0 auto;
    width: 100%;
}

.main-flex-item {
    flex: 1 1 320px;
    max-width: 380px;
    min-width: 280px;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.75rem;
    background:
        linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,0)) ,
        var(--surface-1);
    overflow: hidden;
    position: relative;
    transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
    box-shadow: var(--shadow-1);
}

/* gradient accent line that appears on hover */
.main-flex-item::after {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: var(--grad-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .45s var(--ease);
}

.main-flex-item:hover {
    transform: translateY(-8px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-3), 0 0 40px rgba(255,72,196,.15);
}
.main-flex-item:hover::after { transform: scaleX(1); }
.main-flex-item:active { transform: translateY(-4px) scale(.995); }

/* section inside the card */
.main-flex-item section[class^="container-"] {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    border: none;
    padding: 0;
    margin: 0;
    border-radius: 0;
    background-color: transparent;
}

/* Scoped with section[class^="container-"] so these out-specify the legacy
   .container-X widths further down the file (which otherwise squeezed the text
   to 66% and the images to 33% inside the feature cards). */
.main-flex-item section[class^="container-"] .text-container {
    width: 100%;
    flex-grow: 1;
    padding: 0;
    margin: 0;
    order: 1;
    background: transparent;
}

.main-flex-item section[class^="container-"] .image-container {
    width: 100%;
    padding: 1.25rem;
    margin-top: 1.5rem;
    flex-shrink: 0;
    order: 2;
    text-align: center;
    background: rgba(255,255,255,0.045);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
}

.main-flex-item section[class^="container-"] .image-container img {
    width: 90%;
    height: auto;
    display: inline-block;
    vertical-align: middle;
    filter: drop-shadow(0 6px 18px rgba(0,0,0,.35));
}

.main-flex-item .container-1 .image-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: .75rem;
}
.main-flex-item .container-1 .image-container img { width: auto; flex-shrink: 1; height: auto; }
.main-flex-item .container-1 .image-container .shake-flask { width: 22%; }
.main-flex-item .container-1 .image-container .arrows     { width: 26%; }
.main-flex-item .container-1 .image-container .bioreactor { width: 40%; }
.main-flex-item .flowchart-image { width: 96%; height: auto; }

/* headings/text inside index cards */
main .main-flex-item h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.4rem !important;
    text-align: left;
    color: var(--yellow);
    margin: 0 0 .85rem;
    letter-spacing: -0.02em;
}

.main-flex-item h4 {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: .98rem;
    line-height: 1.6;
    text-align: left;
    color: var(--text-soft);
    margin: 0;
}

/* Legacy standalone container styles (used elsewhere) */
.container-1, .container-2, .container-3, .container-4 {
    display: flex;
    align-items: center;
    width: 75%;
    max-width: var(--maxw);
    margin: 0 auto 120px auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    background-color: var(--surface-1);
}
.container-1, .container-4 { flex-direction: row; }
.container-2, .container-3 { flex-direction: row-reverse; }

.container-1 .text-container, .container-2 .text-container,
.container-3 .text-container, .container-4 .text-container {
    width: 66.66%;
    background-color: transparent;
    border-radius: 10px;
    padding: 2rem;
    margin: 0 20px;
}
.container-1 .image-container, .container-2 .image-container,
.container-3 .image-container, .container-4 .image-container {
    width: 33.33%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}
.container-1 .image-container img, .container-2 .image-container img,
.container-3 .image-container img, .container-4 .image-container img {
    max-width: 100%; height: auto; object-fit: contain;
}

/* ============================================================================
   NAVBAR — sleek floating menu (markup unchanged)
   ============================================================================ */
.navbar-menu-label {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 1001;
    cursor: pointer;
}
.navbar-menu-label input[type="checkbox"] { display: none; }

.menu {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    position: relative;
    border-radius: var(--radius-pill);
    background: rgba(12,12,46,.55);
    border: 1px solid var(--border-soft);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-2);
    transition: border-color .3s var(--ease), background .3s var(--ease);
}
.menu:hover { border-color: var(--border-strong); background: rgba(19,19,61,.7); }

.hamburger {
    display: block;
    position: relative;
    height: 2px;
    width: 22px;
    background: var(--yellow);
    border-radius: 2px;
    transition: .3s var(--ease);
}
.hamburger::before, .hamburger::after {
    content: "";
    position: absolute;
    left: 0;
    height: 2px;
    width: 22px;
    background: var(--yellow);
    border-radius: 2px;
    transition: .3s var(--ease);
}
.hamburger::before { top: -7px; }
.hamburger::after  { top:  7px; }

.navbar-menu-label input[type="checkbox"]:checked ~ .menu .hamburger { background: transparent; }
.navbar-menu-label input[type="checkbox"]:checked ~ .menu .hamburger::before { transform: rotate(45deg)  translate(5px, 5px); }
.navbar-menu-label input[type="checkbox"]:checked ~ .menu .hamburger::after  { transform: rotate(-45deg) translate(5px, -5px); }

.navbar-menu-label ul {
    position: fixed;
    right: 16px;
    top: 82px;
    width: 280px;
    max-width: calc(100vw - 32px);
    background: rgba(7,7,34,.86);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    padding: .75rem;
    list-style: none;
    margin: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-3);
    text-align: left;
    transform: translateY(-12px) scale(.96);
    opacity: 0;
    visibility: hidden;
    transform-origin: top right;
    transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}
.navbar-menu-label input[type="checkbox"]:checked ~ ul {
    transform: translateY(0) scale(1);
    opacity: 1;
    visibility: visible;
}
.navbar-menu-label ul li { padding: 0; }
.navbar-menu-label ul li a {
    color: var(--text);
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
    display: block;
    padding: .7rem .9rem;
    border-radius: 10px;
    transition: background .2s var(--ease), color .2s var(--ease), padding-left .2s var(--ease);
}
.navbar-menu-label ul li a:hover {
    color: var(--yellow);
    background: rgba(255,72,196,.12);
    padding-left: 1.15rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
footer {
    background-color: transparent;
    color: var(--text-dim);
    text-align: center;
    padding: 2.5rem 1rem;
    border-top: 1px solid var(--border-soft);
    margin-top: 2rem;
    width: 100%;
    font-family: var(--font-body);
    font-size: .9rem;
}
.footer-content p { margin: 0; }

/* ============================================================================
   CALCULATOR — landing grid
   ============================================================================ */
.calculator-main {
    padding: 7rem 1.5rem 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.page-title {
    text-align: center;
    font-family: var(--font-display);
    font-weight: 900;
    color: var(--yellow);
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -0.03em;
    margin: 0 0 3rem;
    color: var(--yellow);
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}
.calculator-grid a { text-decoration: none; }

.container-calc {
    background:
        linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,0)),
        var(--surface-1);
    border: 1px solid var(--border-soft);
    padding: 1.5rem 1.25rem;
    color: var(--text);
    text-align: center;
    min-height: 150px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: .5rem;
    transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
    box-shadow: var(--shadow-1);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}
.container-calc::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--grad-brand);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity .35s var(--ease);
    pointer-events: none;
}
.container-calc:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2), 0 0 34px rgba(255,72,196,.16);
    border-color: transparent;
}
.container-calc:hover::before { opacity: 1; }

.container-calc h5 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--yellow);
    line-height: 1.2;
}
.container-calc p {
    font-family: var(--font-body);
    font-size: .9rem;
    line-height: 1.5;
    color: var(--text-soft);
    margin: 0;
    flex-grow: 0;
}

/* ============================================================================
   CALCULATOR — form page
   ============================================================================ */
.calculator-container {
    max-width: 760px;
    margin: 7rem auto 2rem;
    padding: 2.5rem;
    position: relative;
    background:
        linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,0)),
        var(--surface-1);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-2);
    box-sizing: border-box;
}
.calculator-container h1 {
    font-family: var(--font-display);
    font-weight: 900;
    text-align: center;
    color: var(--yellow);
    font-size: clamp(1.8rem, 4.5vw, 2.4rem);
    letter-spacing: -0.03em;
    margin: 0 0 2.25rem;
}

.form-group { margin-bottom: 1.25rem; }

.calculator-container .form-group label,
.content-panel .form-group label {
    display: block;
    margin-bottom: .5rem;
    color: var(--text);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: .95rem;
    letter-spacing: -0.01em;
    position: static;
}

/* inputs */
.calculator-container input[type="text"],
.calculator-container input[type="number"],
.calculator-container input[type="email"],
.calculator-container select,
.calculator-container textarea,
.calculator-container .form-control,
.calculator-container .form-select {
    background-color: var(--surface-3);
    color: var(--text);
    border: 1px solid var(--border-soft);
    padding: .7rem .85rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0;
    width: 100%;
    box-sizing: border-box;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.calculator-container input::placeholder,
.calculator-container textarea::placeholder {
    color: var(--text-dim);
    opacity: 1;
}
.calculator-container select,
.calculator-container .form-select {
    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 fill='%23f3ea5f' d='M6 8L0 2l1.4-1.4L6 5.2 10.6.6 12 2z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .9rem center;
    background-size: 11px;
    padding-right: 2.25rem;
}
.calculator-container input:focus,
.calculator-container select:focus,
.calculator-container textarea:focus,
.calculator-container .form-control:focus,
.calculator-container .form-select:focus {
    outline: none;
    border-color: var(--pink);
    background-color: var(--surface-2);
    box-shadow: 0 0 0 3px rgba(255,72,196,.18);
}

/* buttons */
.calculator-container button,
.calculator-container .btn-primary,
.btn.btn-primary {
    background: var(--grad-warm);
    color: #150015;
    border: none;
    padding: .85rem 2rem;
    border-radius: var(--radius-pill);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .3s var(--ease), filter .2s var(--ease);
    display: block;
    width: fit-content;
    margin: 2rem auto 0;
    box-shadow: 0 8px 24px rgba(255,72,196,.28);
}
.calculator-container button:hover,
.calculator-container .btn-primary:hover,
.btn.btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.06);
    box-shadow: 0 12px 30px rgba(255,72,196,.4);
}
.calculator-container button:active,
.calculator-container .btn-primary:active { transform: translateY(0); }

/* results */
.result-box {
    margin-top: 2rem;
    padding: 1.5rem 1.75rem;
    background: rgba(43,209,252,.06);
    border: 1px solid rgba(43,209,252,.35);
    border-radius: var(--radius-sm);
    box-shadow: inset 0 0 0 1px rgba(43,209,252,.05);
}
.result-box h4 {
    margin: 0 0 1rem;
    color: var(--blue);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.01em;
}
.result-box p {
    margin: .4rem 0;
    color: var(--text);
    font-family: var(--font-body);
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px dashed var(--border-soft);
    padding-bottom: .4rem;
}
.result-box p:last-child { border-bottom: none; }
.result-box span { color: var(--yellow); font-weight: 700; }

/* explanation box (CSS fallback; some pages set inline styles) */
.explanation-container {
    max-width: 760px;
    margin: 1.5rem auto 3rem;
    padding: 1.5rem 1.75rem;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-1);
}
.explanation-container h4 {
    margin: 0 0 .75rem;
    color: var(--pink);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.15rem;
}
.explanation-container p { color: var(--text-soft); margin: 0; line-height: 1.65; }

/* Hide raw help text (surfaced via JS tooltip) */
.calculator-container .form-group .form-text { display: none; }

/* Utility classes referenced by calculator pages */
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1.5rem; }

/* ============================================================================
   TOOLTIP
   ============================================================================ */
#custom-tooltip {
    position: fixed;
    display: none;
    background: rgba(7,7,34,.95);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: .7rem 1rem;
    font-size: .88rem;
    font-family: var(--font-body);
    z-index: 1010;
    max-width: 300px;
    box-shadow: var(--shadow-2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: none;
    line-height: 1.5;
}
#custom-tooltip strong { color: var(--pink); }

/* ============================================================================
   ABOUT
   ============================================================================ */
.container { padding: 0 1.25rem; }
.about-content {
    padding-top: 7rem !important;
    max-width: 640px;
    margin: 0 auto 3rem;
    text-align: center;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 3rem 2.5rem !important;
    box-shadow: var(--shadow-2);
    margin-top: 7rem;
}
.about-content h1 {
    font-family: var(--font-display);
    font-weight: 900;
    color: var(--yellow);
    font-size: clamp(1.9rem, 5vw, 2.6rem);
    letter-spacing: -0.03em;
    margin: 0 0 1.75rem;
}
.about-content img[alt="Corjan van den Berg"] {
    border: 3px solid transparent;
    background: var(--grad-brand) border-box;
    box-shadow: 0 10px 30px rgba(255,72,196,.25);
}
.about-content p { color: var(--text-soft); }

/* ============================================================================
   REFERENCE TABLES
   ============================================================================ */
.reference-table {
    width: 100%;
    max-width: 760px;
    margin: 1.5rem auto;
    border-collapse: separate;
    border-spacing: 0;
    color: var(--text);
    font-family: var(--font-body);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.reference-table th, .reference-table td {
    border-bottom: 1px solid var(--border-soft);
    padding: .75rem 1rem;
    text-align: left;
}
.reference-table th {
    background: var(--surface-3);
    color: var(--yellow);
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.01em;
}
.reference-table tr:nth-child(even) td { background: rgba(255,255,255,.02); }
.reference-table tr:last-child td { border-bottom: none; }
.reference-table caption {
    caption-side: bottom;
    text-align: center;
    margin-top: .75rem;
    font-style: italic;
    color: var(--text-dim);
}

/* ============================================================================
   SIMULATION PAGE LAYOUT
   ============================================================================ */
.simulation-layout {
    display: flex;
    gap: 1.25rem;
    padding: 6rem 1.25rem 2rem;
    align-items: flex-start;
    max-width: 1400px;
    margin: 0 auto;
}
.tab-icon-column {
    flex: 0 0 170px;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    padding: 1rem;
    border-radius: var(--radius);
    position: sticky;
    top: 90px;
    height: calc(100vh - 110px);
    overflow-y: auto;
}
.tab-icon-column h3 {
    text-align: center;
    margin: 0 0 1rem;
    color: var(--yellow);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
}
.icon-tabs-container { display: flex; flex-direction: column; gap: .35rem; }
.icon-tab {
    display: flex;
    align-items: center;
    padding: .6rem .7rem;
    border-radius: 10px;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease);
    border: 1px solid transparent;
    border-left: 3px solid transparent;
    background: transparent;
}
.icon-tab:hover { background: rgba(255,255,255,.04); }
.icon-tab.active {
    background: rgba(255,72,196,.10);
    border-left: 3px solid var(--yellow);
}
.icon-tab img { width: 22px; height: 22px; margin-right: .6rem; object-fit: contain; }
.icon-tab span { font-size: .9rem; color: var(--text-soft); font-family: var(--font-body); }
.icon-tab.active span { color: var(--yellow); }

.content-display-column { flex: 1; min-width: 0; }
.content-display-column .main-content { width: 100%; }

.content-panel {
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-1);
}
.content-panel h2 {
    margin: 0 0 1.5rem;
    color: var(--yellow);
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.02em;
    border-bottom: 1px solid var(--border);
    padding-bottom: .75rem;
}

.tab { display: none; }
.tablinks { display: none; }

.content-panel .form-group input[type="number"],
.content-panel .form-group select {
    background-color: var(--surface-3);
    color: var(--text);
    border: 1px solid var(--border-soft);
    padding: .7rem .85rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    width: 100%;
    max-width: 260px;
    box-sizing: border-box;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.content-panel .form-group select {
    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 fill='%23f3ea5f' d='M6 8L0 2l1.4-1.4L6 5.2 10.6.6 12 2z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .9rem center;
    background-size: 11px;
    padding-right: 2.25rem;
}
.content-panel .form-group input:focus,
.content-panel .form-group select:focus {
    outline: none;
    border-color: var(--pink);
    box-shadow: 0 0 0 3px rgba(255,72,196,.18);
}

#runButton, #saveButton {
    background: var(--grad-warm);
    color: #150015;
    border: none;
    padding: .8rem 1.75rem;
    border-radius: var(--radius-pill);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1rem;
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .3s var(--ease), filter .2s var(--ease);
    display: inline-block;
    width: auto;
    margin: .5rem;
    box-shadow: 0 8px 24px rgba(255,72,196,.28);
}
#saveButton {
    background: transparent;
    color: var(--blue);
    border: 1px solid rgba(43,209,252,.5);
    box-shadow: none;
}
#runButton:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: 0 12px 30px rgba(255,72,196,.4); }
#saveButton:hover { background: rgba(43,209,252,.10); color: var(--blue); transform: translateY(-2px); }

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 900px) {
    .simulation-layout { flex-direction: column; }
    .tab-icon-column {
        position: static;
        height: auto;
        width: 100%;
        flex: 1 1 auto;
    }
    .icon-tabs-container { flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 768px) {
    .page-header { padding: 6rem 1.25rem 2rem; }

    .container-1, .container-2, .container-3, .container-4 {
        flex-direction: column;
        width: 90%;
        margin: 0 auto 60px auto;
    }
    .container-1 .text-container, .container-2 .text-container,
    .container-3 .text-container, .container-4 .text-container {
        width: 100%; margin: 1rem 0; padding: 1rem;
    }
    .container-1 .image-container, .container-2 .image-container,
    .container-3 .image-container, .container-4 .image-container {
        width: 100%; margin: 1rem 0;
    }

    .main-flex-item { flex: 1 1 100%; max-width: 520px; }
    .navbar-menu-label ul { width: 260px; }
}

@media (max-width: 600px) {
    .calculator-container { padding: 1.75rem 1.25rem; margin-top: 6rem; }
    .calculator-main { padding-top: 6rem; }
    .about-content { padding: 2.25rem 1.5rem !important; }
    .result-box p { flex-direction: column; gap: .1rem; }
}