/* =====================================================================
   Quick Bench Analyzer — Design System (theme.css)
   Token layer + shared primitives + light/dark theming + motion.
   Module layouts live in qpcr-style.css / wb-style.css and consume
   these tokens. Loaded FIRST so every other rule can reference tokens.
   ===================================================================== */

/* ---------- Tokens: scales (theme-independent) ---------- */
:root {
    /* spacing */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-8: 32px;

    /* radius */
    --r-xs: 6px;
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-pill: 999px;

    /* typography */
    --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
    --fs-xs: 11px;
    --fs-sm: 12px;
    --fs-base: 13px;
    --fs-md: 14px;
    --fs-lg: 16px;
    --fs-xl: 18px;

    /* motion */
    --dur-fast: 120ms;
    --dur: 190ms;
    --dur-slow: 320ms;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* z-index */
    --z-sticky: 5;
    --z-toolbar: 10;
    --z-toast: 60;
    --z-tooltip: 70;
}

/* ---------- Tokens: light theme (default) ---------- */
:root {
    color-scheme: light;

    --bg: #eef2f7;
    --bg-grad: radial-gradient(1200px 600px at 15% -10%, #e9effa 0%, rgba(233, 239, 250, 0) 55%),
        radial-gradient(1000px 700px at 110% 0%, #edeafc 0%, rgba(237, 234, 252, 0) 50%), #eef2f7;
    --surface: #ffffff;
    --surface-2: #f7f9fc;
    --surface-3: #eef3f9;
    --surface-inset: #fbfdff;

    --text: #101828;
    --text-soft: #556074;
    --text-faint: #8a95a6;
    --text-invert: #ffffff;

    --line: #e2e8f1;
    --line-strong: #c6d1df;

    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-soft: #eceafe;
    --primary-border: #cdc7fb;
    --on-primary: #ffffff;

    --accent: #0ea5e9;

    --success: #0f9d68;
    --success-soft: #dcf6ea;
    --success-border: #b3e7cf;
    --warning: #d97706;
    --warning-soft: #fdf1dd;
    --warning-border: #f2d8a8;
    --danger: #dc2626;
    --danger-soft: #fdeaea;
    --danger-border: #f5c6c6;

    /* plate well states */
    --well-default: #f8fafc;
    --well-data: #dbeafe;
    --well-gene: #ece9fe;
    --well-selected: #fde68a;
    --well-control: #d5f6e6;

    /* elevation */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.05);
    --shadow: 0 6px 20px rgba(30, 45, 75, 0.07), 0 1px 3px rgba(30, 45, 75, 0.05);
    --shadow-lg: 0 18px 44px rgba(30, 45, 75, 0.14);
    --ring: 0 0 0 3px rgba(79, 70, 229, 0.28);
    --canvas-surround: #e6edf5;
}

/* ---------- Tokens: dark theme ---------- */
html[data-theme="dark"] {
    color-scheme: dark;

    --bg: #0b1220;
    --bg-grad: radial-gradient(1200px 600px at 15% -10%, #14203a 0%, rgba(20, 32, 58, 0) 55%),
        radial-gradient(1000px 700px at 110% 0%, #1b1a3a 0%, rgba(27, 26, 58, 0) 50%), #0b1220;
    --surface: #131c2e;
    --surface-2: #172236;
    --surface-3: #1c283e;
    --surface-inset: #0f1829;

    --text: #eef2f8;
    --text-soft: #a3b0c4;
    --text-faint: #6f7e95;
    --text-invert: #0b1220;

    --line: #26324a;
    --line-strong: #37475f;

    --primary: #7c74ff;
    --primary-hover: #8f88ff;
    --primary-soft: #211f45;
    --primary-border: #3a3670;
    --on-primary: #0b1220;

    --accent: #38bdf8;

    --success: #34d399;
    --success-soft: #0f2b23;
    --success-border: #1f4a3c;
    --warning: #fbbf24;
    --warning-soft: #2e2410;
    --warning-border: #574326;
    --danger: #f87171;
    --danger-soft: #2c1618;
    --danger-border: #542a2c;

    --well-default: #16223a;
    --well-data: #17324f;
    --well-gene: #262357;
    --well-selected: #5a4718;
    --well-control: #103c30;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.42);
    --shadow-lg: 0 22px 50px rgba(0, 0, 0, 0.55);
    --ring: 0 0 0 3px rgba(124, 116, 255, 0.4);
    --canvas-surround: #0c1526;
}

/* ---------- Reset / base ---------- */
* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg-grad) fixed;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: var(--fs-md);
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

button,
input,
select {
    font: inherit;
    color: inherit;
}

button {
    border: 0;
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1,
h2 {
    text-wrap: balance;
}

p {
    text-wrap: pretty;
}

h1 {
    font-size: clamp(22px, 2.4vw, 30px);
    line-height: 1.12;
    letter-spacing: -0.01em;
}

h2 {
    font-size: var(--fs-lg);
    line-height: 1.2;
    letter-spacing: -0.005em;
}

[hidden] {
    display: none !important;
}

::selection {
    background: var(--primary-soft);
    color: var(--text);
}

/* ---------- Focus ring (keyboard only) ---------- */
:focus-visible {
    outline: none;
    box-shadow: var(--ring);
    border-radius: var(--r-xs);
}

input[type="text"]:focus-visible,
select:focus-visible {
    border-color: var(--primary);
}

/* ---------- Cards / panels ---------- */
.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    padding: var(--sp-4);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
        background-color var(--dur) var(--ease);
}

.main-content:not([hidden]) > *,
.wb-content:not([hidden]) > *,
.planner-content:not([hidden]) > * {
    animation: qb-result-in 380ms var(--ease-out) both;
}

.main-content:not([hidden]) > :nth-child(2),
.wb-content:not([hidden]) > :nth-child(2),
.planner-content:not([hidden]) > :nth-child(2) {
    animation-delay: 55ms;
}

.main-content:not([hidden]) > :nth-child(3),
.wb-content:not([hidden]) > :nth-child(3),
.planner-content:not([hidden]) > :nth-child(3) {
    animation-delay: 110ms;
}

.panel-heading,
.panel-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--sp-3);
    margin-bottom: var(--sp-4);
}

.panel-heading {
    justify-content: flex-start;
}

.panel-heading p,
.panel-title-row p {
    margin-top: var(--sp-1);
    color: var(--text-soft);
    font-size: var(--fs-base);
}

.step-badge {
    display: inline-flex;
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: var(--on-primary);
    border-radius: 50%;
    font-size: var(--fs-base);
    font-weight: 800;
    box-shadow: var(--shadow-sm);
}

/* ---------- Fields ---------- */
.field-row {
    display: grid;
    gap: var(--sp-2);
    margin-bottom: var(--sp-3);
}

.field-row label {
    color: var(--text-soft);
    font-size: var(--fs-base);
    font-weight: 700;
}

input[type="text"],
select {
    width: 100%;
    min-height: 40px;
    padding: 8px 11px;
    background: var(--surface-inset);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    color: var(--text);
    transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
        background-color var(--dur) var(--ease);
}

input[type="text"]::placeholder {
    color: var(--text-faint);
}

input[type="text"]:hover,
select:hover {
    border-color: var(--line-strong);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--primary);
}

.range-val {
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-weight: 800;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 8px 14px;
    border: 1px solid transparent;
    border-radius: var(--r-sm);
    cursor: pointer;
    font-weight: 700;
    white-space: nowrap;
    transition: transform var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease),
        border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
        filter var(--dur-fast) var(--ease);
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: var(--on-primary);
}

.btn-primary:hover:not(:disabled) {
    filter: brightness(1.05);
}

.btn-secondary {
    width: 100%;
    background: var(--success);
    color: var(--text-invert);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), color-mix(in srgb, var(--success) 78%, #063b2a));
    color: #ffffff;
}

.btn-danger {
    background: var(--danger-soft);
    border-color: var(--danger-border);
    color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger);
    color: #ffffff;
}

.btn-ghost {
    background: var(--surface-inset);
    border-color: var(--line);
    color: var(--text-soft);
}

.btn-ghost:hover:not(:disabled) {
    border-color: var(--line-strong);
    color: var(--text);
}

.btn-sm {
    min-height: 34px;
    padding: 6px 11px;
    font-size: var(--fs-base);
}

.btn-large {
    min-height: 46px;
    font-size: var(--fs-lg);
}

.btn.is-busy {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn.is-busy::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid currentColor;
    border-top-color: transparent;
    color: var(--on-primary);
    animation: qb-spin 0.6s linear infinite;
}

.btn.is-ok {
    animation: qb-pop var(--dur-slow) var(--ease-spring);
}

.icon-btn {
    display: inline-grid;
    width: 30px;
    height: 30px;
    place-items: center;
    background: transparent;
    border-radius: 50%;
    color: var(--text-soft);
    cursor: pointer;
    font-size: 18px;
    transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
        transform var(--dur-fast) var(--ease);
}

.icon-btn:hover {
    background: var(--danger-soft);
    color: var(--danger);
    transform: rotate(90deg);
}

/* ---------- Shared info surfaces ---------- */
.file-info,
.notice,
.selection-info,
.well-chip-list {
    margin-top: var(--sp-3);
    padding: 9px 11px;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    color: var(--text-soft);
    font-size: var(--fs-base);
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-2);
    animation: qb-slide-in var(--dur) var(--ease-out);
}

.notice {
    background: var(--success-soft);
    border-color: var(--success-border);
    color: var(--success);
    animation: qb-slide-in var(--dur) var(--ease-out);
}

.notice.is-warn {
    background: var(--warning-soft);
    border-color: var(--warning-border);
    color: var(--warning);
}

.selection-info {
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.selection-info.has-selection {
    border-color: var(--warning-border);
    background: var(--warning-soft);
    color: var(--warning);
    font-weight: 700;
}

.list-heading,
.result-heading {
    color: var(--text-faint);
    font-size: var(--fs-sm);
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.muted-line {
    color: var(--text-faint);
    font-size: var(--fs-base);
}

.item-name {
    color: var(--text);
    font-weight: 800;
    word-break: break-word;
}

.item-meta {
    margin-top: 2px;
    color: var(--text-faint);
    font-size: var(--fs-sm);
    word-break: break-word;
}

/* chips */
.well-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-1);
    min-height: 40px;
    align-items: center;
}

.well-chip {
    padding: 4px 9px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-pill);
    color: var(--text-soft);
    cursor: pointer;
    font-size: var(--fs-sm);
    font-weight: 800;
    transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
        transform var(--dur-fast) var(--ease);
    animation: qb-pop var(--dur) var(--ease-spring);
}

.well-chip:hover {
    border-color: var(--danger);
    color: var(--danger);
    transform: translateY(-1px);
}

.well-chip::after {
    content: " ×";
    opacity: 0.5;
}

/* ---------- Empty states ---------- */
.empty-state {
    display: grid;
    min-height: 300px;
    place-content: center;
    justify-items: center;
    gap: var(--sp-2);
    padding: var(--sp-6);
    color: var(--text-soft);
    text-align: center;
    animation: qb-fade var(--dur-slow) var(--ease-out);
}

.empty-state strong {
    color: var(--text);
    font-size: var(--fs-lg);
}

.empty-state span {
    max-width: 34ch;
    font-size: var(--fs-base);
}

.empty-state .empty-icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    margin-bottom: var(--sp-1);
    border-radius: var(--r-md);
    background: var(--surface-3);
    color: var(--text-faint);
    font-size: 24px;
}

/* ---------- Results: tabs (shared qPCR + WB) ---------- */
.result-tabs {
    display: flex;
    gap: var(--sp-1);
    margin-bottom: var(--sp-3);
    padding-bottom: 2px;
    border-bottom: 1px solid var(--line);
    overflow-x: auto;
}

.result-tab {
    padding: 8px 13px;
    background: transparent;
    border-bottom: 2px solid transparent;
    color: var(--text-soft);
    cursor: pointer;
    font-size: var(--fs-base);
    font-weight: 700;
    white-space: nowrap;
    transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.result-tab:hover {
    color: var(--text);
}

.result-tab.is-active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.result-pane {
    animation: qb-fade var(--dur) var(--ease-out);
}

/* ---------- Results: charts (shared) ---------- */
.result-block,
.chart-list {
    display: grid;
    gap: var(--sp-4);
}

.gene-chart {
    padding: var(--sp-3);
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
}

.chart-title {
    margin-bottom: var(--sp-3);
    color: var(--text);
    font-weight: 800;
    font-size: var(--fs-md);
}

.bar-chart {
    display: flex;
    min-height: 190px;
    align-items: end;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-2) 0;
    border-left: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.bar-item {
    display: grid;
    min-width: 56px;
    flex: 1;
    align-items: end;
    gap: var(--sp-1);
    text-align: center;
}

.bar-value {
    color: var(--text-soft);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 800;
}

.bar-track {
    position: relative;
    display: flex;
    height: 120px;
    align-items: end;
    justify-content: center;
}

.bar-fill {
    width: min(46px, 72%);
    min-height: 2px;
    border-radius: 6px 6px 0 0;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
    transition: height var(--dur-slow) var(--ease-out);
    animation: qb-grow var(--dur-slow) var(--ease-out);
    transform-origin: bottom;
}

.bar-error {
    position: absolute;
    left: 50%;
    width: 1.5px;
    background: var(--text-faint);
    transform: translateX(-50%);
    pointer-events: none;
}

.bar-error::before,
.bar-error::after {
    content: "";
    position: absolute;
    left: 50%;
    width: 9px;
    height: 1.5px;
    background: var(--text-faint);
    transform: translateX(-50%);
}

.bar-error::before {
    top: 0;
}

.bar-error::after {
    bottom: 0;
}

.bar-label {
    min-height: 34px;
    color: var(--text-soft);
    font-size: var(--fs-sm);
    font-weight: 700;
    overflow-wrap: anywhere;
}

/* ---------- Results: tables (shared) ---------- */
.results-table {
    width: 100%;
    max-height: 460px;
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    font-size: var(--fs-base);
}

th,
td {
    padding: 9px 11px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    white-space: nowrap;
}

th {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--surface-3);
    color: var(--text-soft);
    font-weight: 800;
}

td {
    font-variant-numeric: tabular-nums;
}

tbody tr:last-child td {
    border-bottom: 0;
}

tbody tr {
    transition: background-color var(--dur-fast) var(--ease);
}

tbody tr:hover td {
    background: var(--surface-2);
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: var(--z-toast);
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    max-width: min(420px, calc(100vw - 36px));
    padding: 12px 15px;
    background: #1f2a44;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 3px solid var(--accent);
    border-radius: var(--r-sm);
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    font-size: var(--fs-md);
    font-weight: 600;
}

.toast::before {
    content: "";
    font-size: 16px;
    line-height: 1;
}

.toast.is-success {
    border-left-color: var(--success);
}

.toast.is-success::before {
    content: "✓";
    color: var(--success);
}

.toast.is-error {
    border-left-color: var(--danger);
}

.toast.is-error::before {
    content: "!";
    color: var(--danger);
    font-weight: 900;
}

.toast.is-warn {
    border-left-color: var(--warning);
}

.toast.is-warn::before {
    content: "!";
    color: var(--warning);
    font-weight: 900;
}

.toast.is-enter {
    animation: qb-toast-in var(--dur) var(--ease-out);
}

.toast.is-leave {
    animation: qb-toast-out var(--dur) var(--ease) forwards;
}

/* ---------- Tooltip ---------- */
.qb-tooltip {
    position: fixed;
    z-index: var(--z-tooltip);
    max-width: 260px;
    padding: 7px 10px;
    background: #1f2a44;
    color: #fff;
    border-radius: var(--r-xs);
    font-size: var(--fs-sm);
    font-weight: 600;
    line-height: 1.35;
    box-shadow: var(--shadow-lg);
    pointer-events: none;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.qb-tooltip.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Theme toggle ---------- */
.theme-toggle {
    display: inline-grid;
    place-items: center;
    width: 40px;
    height: 40px;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    color: var(--text-soft);
    cursor: pointer;
    transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
        background-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.theme-toggle:hover {
    border-color: var(--line-strong);
    color: var(--text);
    transform: translateY(-1px);
}

.theme-toggle svg {
    width: 19px;
    height: 19px;
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

html[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

html[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* ---------- Keyframes ---------- */
@keyframes qb-spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes qb-pop {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes qb-fade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes qb-module-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qb-result-in {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qb-select-pulse {
    0% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1.05);
    }
}

@keyframes qb-slide-in {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qb-grow {
    from {
        transform: scaleY(0);
    }
    to {
        transform: scaleY(1);
    }
}

@keyframes qb-toast-in {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes qb-toast-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(12px);
    }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}