:root {
    /* Colors */
    --bg: #0f141a;
    --card: #171e28;
    --text: #e8eefc;
    --muted: #8a99b5;
    --accent: #7aa2ff;
    --accent-glow: rgba(122, 162, 255, 0.2);
    --border: #2a3447;

    /* Typography (fluid) */
    --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, 'Helvetica Neue', Arial, 'Noto Sans';
    --fs-sm: clamp(0.85rem, 0.78rem + 0.4vw, 0.95rem);
    --fs-base: clamp(0.95rem, 0.9rem + 0.5vw, 1.05rem);
    --fs-lg: clamp(1.1rem, 1rem + 0.8vw, 1.35rem);
    --fs-xl: clamp(1.5rem, 1.2rem + 2vw, 2rem);
    --fs-xxl: clamp(2rem, 1.6rem + 3vw, 2.75rem);

    /* Spacing (fluid) */
    --space-1: clamp(6px, 0.3vw + 4px, 10px);
    --space-2: clamp(10px, 0.6vw + 8px, 14px);
    --space-3: clamp(14px, 1vw + 10px, 18px);
    --space-4: clamp(18px, 1.4vw + 12px, 24px);
    --space-5: clamp(24px, 2vw + 16px, 32px);
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-image:
        radial-gradient(circle at 10% 20%, var(--accent-glow), transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(48, 228, 168, 0.08), transparent 40%);
    min-height: 100vh;
    background-attachment: fixed;
    position: relative;
    z-index: 1;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 var(--space-2) 0;
    font-weight: 800;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--fs-xxl);
}

h2 {
    font-size: var(--fs-xl);
}

h5 {
    font-size: var(--fs-lg);
    color: var(--accent);
    margin-bottom: var(--space-3);
}

p {
    margin: 0 0 var(--space-2) 0;
}

strong {
    color: var(--accent);
}

.app {
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: var(--space-5) var(--space-4);
    position: relative;
    z-index: 1;
    /* ensures app is above background */
}

/* --- Nav & Tabs --- */
.nav {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--space-5);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--fs-lg);
    font-weight: 800;
    min-height: 44px;
}

.brand-logo {
    height: clamp(24px, 2.6vw, 32px);
    width: auto;
}

.tabs {
    display: flex;
    gap: var(--space-1);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
    display: none;
}

.tab {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 12px;
    font-size: var(--fs-sm);
    font-weight: 600;
    cursor: pointer;
    flex: 0 0 auto;
    min-height: 36px;
    transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}

.tab:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow) inset;
}

.tab.active {
    border-color: var(--accent);
    background: rgba(122, 162, 255, 0.08);
    color: var(--text);
    box-shadow: 0 0 0 3px var(--accent-glow) inset;
}

.view {
    display: none;
}

.view.show {
    display: block;
}

.hidden {
    display: none !important;
}

/* --- Cards / Inputs --- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.form-grid.two-col {
    grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
}

.field {
    display: grid;
    gap: 6px;
}

.field span {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--muted);
}

input,
select,
button {
    font: inherit;
}

input[type="number"],
select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    width: 100%;
    min-height: 44px;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Radios / Checkboxes */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    align-items: center;
    background: var(--bg);
    padding: 8px;
    border-radius: 10px;
}

.radio-group label {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 36px;
}

.custom-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
}

.custom-checkbox .checkmark {
    width: 20px;
    height: 20px;
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    position: relative;
}

.custom-checkbox .checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}

.custom-checkbox input:checked+.checkmark {
    background-color: var(--accent);
    border-color: var(--accent);
}

.custom-checkbox input:checked+.checkmark:after {
    display: block;
}

/* File drop */
.file-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: var(--space-5);
    text-align: center;
    cursor: pointer;
    transition: border-color .2s ease, background-color .2s ease;
    min-height: clamp(160px, 24vw, 260px);
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(122, 162, 255, 0.05);
}

.file-drop-zone input[type="file"] {
    display: none;
}

/* Tables */
.results-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-3);
    white-space: nowrap;
}

.results-table th,
.results-table td {
    border-bottom: 1px solid var(--border);
    padding: 12px 8px;
    text-align: left;
    vertical-align: middle;
}

.results-table th {
    color: var(--muted);
    font-weight: 600;
}

.results-table img {
    width: clamp(24px, 4.2vw, 32px);
    height: auto;
    vertical-align: middle;
    margin-right: 8px;
    filter: grayscale(80%);
}

/* Result callouts */
.result-box {
    background: var(--accent-glow);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: var(--space-3);
    border-radius: var(--radius);
    margin-top: var(--space-4);
    font-size: var(--fs-lg);
    text-align: center;
}

.result-box b {
    color: #fff;
    font-weight: 800;
}

/* Graph */
.graph-container {
    height: clamp(260px, 46vw, 420px);
    margin-top: var(--space-4);
    background: var(--bg);
    padding: var(--space-3);
    border-radius: 10px;
}

canvas,
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Footer (disclaimer) */
.site-footer {
    margin-top: var(--space-5);
    padding: var(--space-3) 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: var(--fs-sm);
    text-align: center;
}

.site-footer strong {
    color: var(--text);
}

.site-footer .site-credit {
    margin-top: 0.35rem;
}

/* --- Responsive refinements --- */
@media (max-width: 992px) {
    .nav {
        gap: var(--space-2);
    }
}

@media (max-width: 768px) {
    .app {
        padding: var(--space-4) var(--space-3);
    }

    .card {
        padding: var(--space-3);
    }

    .tabs {
        gap: 6px;
    }

    .results-table {
        font-size: var(--fs-sm);
    }

    .site-footer {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
        padding-bottom: var(--space-5);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .brand {
        font-size: var(--fs-base);
    }

    .tabs {
        gap: 6px;
    }

    .tab {
        padding: 8px 10px;
    }
}

/* Motion accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --------- Mobile Drawer (slide from right) --------- */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100dvh;
    width: clamp(260px, 70vw, 320px);
    background: var(--card);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 10001;
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: -8px 0 20px rgba(0, 0, 0, 0.3);
}

.nav.open .mobile-drawer {
    transform: translateX(0);
}

/* Move tabs down below the X */
.mobile-drawer .tabs {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 48px;
}

.mobile-drawer .tab {
    width: 100%;
    text-align: left;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    font-weight: 600;
    color: var(--text);
    transition: all 0.2s ease;
}

.mobile-drawer .tab:hover {
    border-color: var(--accent);
    background: rgba(122, 162, 255, 0.08);
}

/* Overlay for drawer */
.nav-overlay {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 10000;
}

.nav.open+.nav-overlay {
    opacity: 1;
    visibility: visible;
}

/* Minimal hamburger (top-right corner) */
.hamburger {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 10002;
    /* above overlay */
    position: absolute;
    top: 16px;
    right: 16px;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    margin: 4px 0;
    transition: transform .2s ease, opacity .2s ease;
}

/* animate to "X" */
.nav.open .hamburger span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav.open .hamburger span:nth-child(2) {
    opacity: 0;
}

.nav.open .hamburger span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 1024px) {
    .hamburger {
        display: block;
    }

    /* Hide thruster icons on small screens */
    .results-table td img,
    .results-table th img {
        display: none !important;
    }
}

/* ===== Desktop-only decorative background in the left gutter ===== */
/* One single rule set; no duplicates */
@media (min-width: 1025px) {

    /* Keep this in sync with the .app max width */
    :root {
        --container-max: 1200px;
    }

    /* kill any older background pseudo-elements on body */
    body::before {
        content: none;
    }

    /* place the image in the left gutter using the app's centering math */
    .app::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: calc((100vw - min(var(--container-max), 100vw)) / 2);
        height: 100vh;

        background-image: url('https://i.imgur.com/mqtV2j4.png');
        background-repeat: no-repeat;
        background-position: 12px center;
        /* keep that margin */
        background-size: contain;
        /* 👈 scales image fully inside gutter */

        opacity: 0.15;
        pointer-events: none;
        z-index: 0;
    }



    /* Hide decorative bg on tablet/phone */
    @media (max-width: 1024px) {
        .app::before {
            content: none !important;
        }
    }
}

/* === Lock navbar to the same bounds as the main content === */
@media (min-width: 1025px) {
    :root {
        --container-max: 1200px;
    }

    /* must match .app */

    .nav {
        /* constrain to content width and center it */
        box-sizing: border-box;
        width: 100%;
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 12px var(--space-4);
        /* same horizontal padding as .app */
        border-bottom: 1px solid var(--border);

        /* one row: brand left, tabs to the right */
        display: flex !important;
        flex-direction: row !important;
        align-items: center;
        justify-content: flex-start;
        gap: 28px;
    }

    .brand {
        position: static !important;
        transform: none !important;
        margin: 0;
        flex: 0 0 auto;
    }

    /* Drawer behaves like a normal inline container on desktop */
    .mobile-drawer {
        position: static !important;
        transform: none !important;
        width: auto;
        height: auto;
        background: transparent;
        border: 0;
        box-shadow: none;
        padding: 0;
        flex: 1 1 auto;
        /* take remaining row width */
    }

    .mobile-drawer .tabs {
        display: flex !important;
        flex-direction: row !important;
        align-items: center;
        justify-content: flex-start;
        /* tabs start right after brand */
        gap: 22px;
        margin: 0;
        overflow: visible;
    }

    /* undo mobile full-width pills */
    .mobile-drawer .tab {
        width: auto !important;
        display: inline-flex;
        align-items: center;
        padding: 8px 14px;
        border-radius: 12px;
        border: 1px solid transparent;
        background: transparent;
        white-space: nowrap;
    }

    /* hide mobile-only UI on desktop */
    .hamburger {
        display: none !important;
    }

    .nav-overlay {
        display: none !important;
    }
}

#blueprintName {
    font-size: var(--fs-xl);
    color: #ff9999;
    font-weight: 800;
}

#blueprintTable {
    table-layout: fixed;
    white-space: normal;
}

#blueprintTable th:last-child,
#blueprintTable td:last-child {
    width: 80px;
    text-align: right;
}

/* Make the original chart image clickable */
.jump-chart-img {
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.jump-chart-img:hover {
    opacity: 0.85;
}

/* Modal Overlay (the dark background) */
.modal-overlay {
    display: none;
    /* Hidden by default */
    position: fixed;
    z-index: 10010;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

/* Class to show the modal (toggled by JS) */
.modal-overlay.show {
    display: flex;
}

/* The enlarged image */
.modal-content {
    display: block;
    max-width: 90%;
    max-height: 90vh;
    animation: zoomIn 0.3s ease;
}

/* Simple zoom-in animation */
@keyframes zoomIn {
    from {
        transform: scale(0.5);
    }

    to {
        transform: scale(1);
    }
}

/* The close button (X) */
.modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}

.modal-close:hover {
    color: #bbb;

}