/* ====================================================================
   VIVA Studio — design system for the researcher-facing pages.

   One file, plain CSS, organised top-to-bottom:
   variables → base → layout → components (buttons, forms, cards,
   toggles, choice cards, stepper, help boxes, modals, tables, misc).

   The participant-facing page has its own stylesheet (run.css);
   interface templates bring their own CSS.
   ==================================================================== */

:root {
    /* Palette — warm paper background, ink text, one indigo accent. */
    --vl-bg:            #f4f2ee;
    --vl-surface:       #ffffff;
    --vl-surface-soft:  #faf9f6;
    --vl-border:        #e5e2da;
    --vl-border-strong: #d8d4cb;
    --vl-ink:           #26251f;
    --vl-ink-soft:      #6f6c64;
    --vl-ink-faint:     #a3a099;
    --vl-accent:        #4f46e5;
    --vl-accent-hover:  #4338ca;
    --vl-accent-soft:   #eeedfc;
    --vl-green:         #15803d;
    --vl-green-soft:    #e9f9ef;
    --vl-amber:         #b45309;
    --vl-amber-soft:    #fdf3e2;
    --vl-red:           #b91c1c;
    --vl-red-soft:      #fdecec;

    --vl-radius:        12px;
    --vl-radius-small:  8px;
    --vl-shadow:        0 1px 3px rgba(30, 28, 20, 0.05);
    --vl-shadow-lift:   0 6px 24px rgba(30, 28, 20, 0.10);
    --vl-font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --vl-mono:          'SF Mono', ui-monospace, Consolas, monospace;
}

/* ── Base ─────────────────────────────────────────────────────────── */
* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--vl-bg);
    color: var(--vl-ink);
    font-family: var(--vl-font);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0 0 10px; line-height: 1.25; }
h1 { font-size: 26px; font-weight: 700; }
h2 { font-size: 20px; font-weight: 650; }
h3 { font-size: 16px; font-weight: 600; }

p  { margin: 0 0 12px; }
a  { color: var(--vl-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
    font-family: var(--vl-mono);
    font-size: 0.85em;
    background: #f0eee8;
    border-radius: 5px;
    padding: 1px 6px;
}

hr { border: none; border-top: 1px solid var(--vl-border); margin: 26px 0; }

.vl-muted  { color: var(--vl-ink-soft); }
.vl-small  { font-size: 13px; }
.vl-mono   { font-family: var(--vl-mono); }

/* ── Page layout ──────────────────────────────────────────────────── */
.vl-page      { max-width: 880px;  margin: 0 auto; padding: 30px 20px 90px; }
.vl-page-wide { max-width: 1240px; margin: 0 auto; padding: 30px 20px 90px; }

.vl-page-title { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.vl-page-title .vl-subline { color: var(--vl-ink-soft); font-size: 14px; }

/* ── Top navigation ───────────────────────────────────────────────── */
.vl-nav {
    background: var(--vl-surface);
    border-bottom: 1px solid var(--vl-border);
    padding: 0 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 40;
}
.vl-nav-brand { display: flex; align-items: center; text-decoration: none; }
.vl-nav-brand:hover { text-decoration: none; }
.vl-nav-brand img { height: 26px; width: auto; display: block; }
.vl-nav-left  { display: flex; align-items: center; gap: 22px; }
.vl-nav-crumb { color: var(--vl-ink-soft); font-size: 14px; max-width: 300px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.vl-nav-right { display: flex; align-items: center; gap: 8px; }
.vl-nav-link  { color: var(--vl-ink-soft); font-size: 14px; font-weight: 500; padding: 8px 10px; border-radius: 8px; }
.vl-nav-link:hover { background: var(--vl-surface-soft); color: var(--vl-ink); text-decoration: none; }
.vl-nav-link.active { color: var(--vl-accent); }

/* Account dropdown */
.vl-account { position: relative; }
.vl-account-btn {
    display: flex; align-items: center; gap: 9px;
    background: none; border: none; cursor: pointer;
    font: inherit; color: var(--vl-ink); padding: 6px 8px; border-radius: 9px;
}
.vl-account-btn:hover { background: var(--vl-surface-soft); }
.vl-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--vl-accent-soft); color: var(--vl-accent);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 700;
}
.vl-account-menu {
    display: none; position: absolute; right: 0; top: calc(100% + 6px);
    background: var(--vl-surface); border: 1px solid var(--vl-border);
    border-radius: 10px; box-shadow: var(--vl-shadow-lift);
    min-width: 190px; padding: 6px; z-index: 60;
}
.vl-account-menu.open { display: block; }
.vl-account-menu a {
    display: block; padding: 9px 12px; border-radius: 7px;
    color: var(--vl-ink); font-size: 14px;
}
.vl-account-menu a:hover { background: var(--vl-surface-soft); text-decoration: none; }
.vl-account-menu .menu-note { padding: 8px 12px 6px; font-size: 12px; color: var(--vl-ink-faint); border-bottom: 1px solid var(--vl-border); margin-bottom: 5px; }

/* ── Cards & sections ─────────────────────────────────────────────── */
.vl-card {
    background: var(--vl-surface);
    border: 1px solid var(--vl-border);
    border-radius: var(--vl-radius);
    box-shadow: var(--vl-shadow);
    padding: 26px 28px;
    margin-bottom: 20px;
}
.vl-card-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 17px; font-weight: 650; margin-bottom: 6px;
}
.vl-card-intro { color: var(--vl-ink-soft); font-size: 14px; margin-bottom: 18px; }

/* Step intro banner (mirrors the "Step N" intro sections) */
.vl-step-intro {
    background: linear-gradient(120deg, var(--vl-accent-soft), #f6f0e6);
    border: 1px solid #e3e0f5;
    border-radius: var(--vl-radius);
    padding: 22px 28px;
    margin-bottom: 22px;
}
.vl-step-intro h2 { margin-bottom: 4px; }
.vl-step-intro p  { margin: 0; color: var(--vl-ink-soft); }

/* ── Buttons ──────────────────────────────────────────────────────── */
.vl-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font: inherit; font-size: 14px; font-weight: 600;
    padding: 9px 16px; border-radius: 9px; cursor: pointer;
    border: 1px solid transparent; text-decoration: none;
    transition: background 0.12s ease, border-color 0.12s ease;
    white-space: nowrap;
}
.vl-btn:hover { text-decoration: none; }
.vl-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.vl-btn-primary { background: var(--vl-accent); color: #fff; }
.vl-btn-primary:hover:not(:disabled) { background: var(--vl-accent-hover); }

.vl-btn-soft { background: var(--vl-accent-soft); color: var(--vl-accent); }
.vl-btn-soft:hover:not(:disabled) { background: #e2e0fa; }

.vl-btn-ghost { background: var(--vl-surface); color: var(--vl-ink); border-color: var(--vl-border-strong); }
.vl-btn-ghost:hover:not(:disabled) { background: var(--vl-surface-soft); }

.vl-btn-danger { background: var(--vl-red-soft); color: var(--vl-red); }
.vl-btn-danger:hover:not(:disabled) { background: #fbdddd; }

.vl-btn-green { background: var(--vl-green-soft); color: var(--vl-green); }
.vl-btn-green:hover:not(:disabled) { background: #dcf5e5; }

.vl-btn-small { font-size: 13px; padding: 6px 12px; border-radius: 8px; }
.vl-btn-lg { font-size: 15px; padding: 12px 24px; border-radius: 10px; }
.vl-btn-block { width: 100%; }

/* ── Forms ────────────────────────────────────────────────────────── */
.vl-field { margin-bottom: 18px; }
.vl-label {
    display: flex; align-items: center; gap: 6px;
    font-size: 13.5px; font-weight: 600; margin-bottom: 6px;
}
.vl-input, .vl-textarea, .vl-select {
    width: 100%;
    font: inherit; font-size: 14px; color: var(--vl-ink);
    background: var(--vl-surface-soft);
    border: 1px solid var(--vl-border-strong);
    border-radius: var(--vl-radius-small);
    padding: 9px 12px;
}
.vl-input:focus, .vl-textarea:focus, .vl-select:focus {
    outline: 2px solid #c7c5f4; border-color: var(--vl-accent);
    background: var(--vl-surface);
}
.vl-textarea { min-height: 96px; resize: vertical; }
.vl-select { appearance: none; -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236f6c64' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 12px center; padding-right: 32px;
}
.vl-help-text { font-size: 12.5px; color: var(--vl-ink-soft); margin-top: 5px; }
.vl-input-row { display: flex; gap: 8px; align-items: flex-start; }
.vl-input-row .vl-input { flex: 1; }

.vl-cols   { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.vl-cols-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .vl-cols, .vl-cols-3 { grid-template-columns: 1fr; } }

/* ── Toggle switch (checkbox with a slider look) ──────────────────── */
.vl-toggle-row {
    display: flex; align-items: flex-start; gap: 12px;
    padding: 6px 0; cursor: pointer;
}
.vl-toggle-row .vl-toggle-text { font-size: 14.5px; font-weight: 550; }
.vl-toggle-row .vl-toggle-sub  { font-size: 13px; color: var(--vl-ink-soft); font-weight: 400; margin-top: 1px; }

.vl-switch { position: relative; flex: none; width: 40px; height: 23px; margin-top: 1px; }
.vl-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.vl-switch .slider {
    position: absolute; inset: 0; border-radius: 23px;
    background: #d3d0c7; transition: background 0.15s ease;
}
.vl-switch .slider::before {
    content: ""; position: absolute; width: 17px; height: 17px;
    left: 3px; top: 3px; border-radius: 50%;
    background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,0.2);
    transition: transform 0.15s ease;
}
.vl-switch input:checked + .slider { background: var(--vl-accent); }
.vl-switch input:checked + .slider::before { transform: translateX(17px); }
.vl-switch input:focus-visible + .slider { outline: 2px solid #c7c5f4; }

/* Plain checkbox row (for lists of data options etc.) */
.vl-check-row { display: flex; align-items: flex-start; gap: 10px; padding: 7px 0; cursor: pointer; font-size: 14.5px; }
.vl-check-row input { width: 16px; height: 16px; margin-top: 3px; accent-color: var(--vl-accent); }

/* Indented follow-up area revealed by a toggle */
.vl-followup {
    margin: 10px 0 6px 52px;
    padding: 16px 18px;
    background: var(--vl-surface-soft);
    border: 1px solid var(--vl-border);
    border-radius: 10px;
}
@media (max-width: 700px) { .vl-followup { margin-left: 0; } }

/* ── Choice cards (big radio buttons with follow-up content) ──────── */
.vl-choice {
    display: flex; align-items: center; justify-content: space-between; gap: 14px;
    border: 1.5px solid var(--vl-border-strong);
    border-radius: var(--vl-radius);
    background: var(--vl-surface);
    padding: 16px 18px; margin-bottom: 10px;
    cursor: pointer; transition: border-color 0.12s ease, background 0.12s ease;
}
.vl-choice:hover { border-color: var(--vl-ink-faint); }
.vl-choice.active { border-color: var(--vl-accent); background: #fcfcff; }
.vl-choice .vl-choice-title { font-weight: 650; font-size: 15px; }
.vl-choice .vl-choice-desc  { font-size: 13.5px; color: var(--vl-ink-soft); margin-top: 2px; }
.vl-choice .vl-choice-check {
    flex: none; width: 24px; height: 24px; border-radius: 50%;
    border: 1.5px solid var(--vl-border-strong);
    display: inline-flex; align-items: center; justify-content: center;
    color: transparent; font-size: 11px; transition: all 0.12s ease;
}
.vl-choice.active .vl-choice-check { background: var(--vl-accent); border-color: var(--vl-accent); color: #fff; }

/* ── Help buttons & boxes (the "?" pattern) ───────────────────────── */
.vl-help-btn {
    flex: none; width: 21px; height: 21px; border-radius: 50%;
    border: none; cursor: pointer;
    background: var(--vl-accent-soft); color: var(--vl-accent);
    font-size: 11px; line-height: 21px; text-align: center; padding: 0;
    vertical-align: 2px;
}
.vl-help-btn:hover { background: #e2e0fa; }

.vl-note {
    display: none;
    border-radius: 10px; padding: 13px 16px; margin: 10px 0 14px;
    font-size: 13.5px; line-height: 1.55;
}
.vl-note.show { display: flex; gap: 12px; }
.vl-note .vl-note-icon { flex: none; width: 20px; text-align: center; padding-top: 1px; }
.vl-note p { margin: 0; }
.vl-note p + p { margin-top: 8px; }
.vl-note-info    { background: var(--vl-accent-soft); color: #3d3897; }
.vl-note-tip     { background: var(--vl-amber-soft);  color: var(--vl-amber); }
.vl-note-warning { background: var(--vl-red-soft);    color: var(--vl-red); }
.vl-note-success { background: var(--vl-green-soft);  color: var(--vl-green); }

/* ── Stepper (the 4-step navigation of the study page) ────────────── */
.vl-stepper {
    display: flex; justify-content: center; gap: 6px;
    list-style: none; margin: 26px auto 8px; padding: 0 16px;
    max-width: 880px;
}
.vl-stepper li { flex: 1; max-width: 200px; }
.vl-step-link {
    display: flex; flex-direction: column; align-items: center; gap: 7px;
    padding: 14px 8px 12px; border-radius: var(--vl-radius);
    color: var(--vl-ink-soft); cursor: pointer; text-align: center;
    background: var(--vl-surface);
    border: 1.5px solid var(--vl-border);
    box-shadow: var(--vl-shadow);
    transition: border-color 0.12s ease, transform 0.12s ease, box-shadow 0.12s ease;
}
.vl-step-link:hover {
    text-decoration: none;
    border-color: var(--vl-accent);
    transform: translateY(-1px);
    box-shadow: var(--vl-shadow-lift);
}
.vl-step-link .vl-step-icon {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--vl-accent-soft); border: none;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px; color: var(--vl-accent);
    transition: all 0.12s ease;
}
.vl-step-link .vl-step-label { font-size: 13px; font-weight: 600; color: var(--vl-ink); }
.vl-step-link .vl-step-number { font-size: 11px; color: var(--vl-accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.vl-stepper li.current .vl-step-link {
    border-color: var(--vl-accent);
    background: #fcfcff;
    box-shadow: 0 0 0 3px var(--vl-accent-soft), var(--vl-shadow);
}
.vl-stepper li.current .vl-step-icon { background: var(--vl-accent); color: #fff; }
.vl-stepper li.current .vl-step-label { color: var(--vl-accent); }
@media (max-width: 700px) {
    .vl-stepper { flex-wrap: wrap; }
    .vl-stepper li { min-width: 40%; }
}

/* Step footer nav */
.vl-step-nav { display: flex; justify-content: space-between; margin-top: 26px; }

/* ── Tabs (e.g. per-condition editing) ────────────────────────────── */
.vl-tabs { display: flex; gap: 4px; border-bottom: 1.5px solid var(--vl-border); margin-bottom: 18px; flex-wrap: wrap; }
.vl-tab {
    font: inherit; font-size: 13.5px; font-weight: 600;
    background: none; border: none; cursor: pointer;
    color: var(--vl-ink-soft); padding: 8px 14px;
    border-bottom: 2px solid transparent; margin-bottom: -1.5px;
}
.vl-tab:hover { color: var(--vl-ink); }
.vl-tab.active { color: var(--vl-accent); border-bottom-color: var(--vl-accent); }

/* ── Badges & status pills ────────────────────────────────────────── */
.vl-badge {
    display: inline-flex; align-items: center; gap: 5px;
    font-size: 12px; font-weight: 650; border-radius: 999px; padding: 3px 10px;
}
.vl-badge-green { background: var(--vl-green-soft); color: var(--vl-green); }
.vl-badge-amber { background: var(--vl-amber-soft); color: var(--vl-amber); }
.vl-badge-gray  { background: #efede7; color: var(--vl-ink-soft); }
.vl-badge-red   { background: var(--vl-red-soft); color: var(--vl-red); }

/* Save indicator (floating, study page) */
.vl-save-indicator {
    position: fixed; top: 66px; right: 18px; z-index: 50;
    background: var(--vl-surface); border: 1px solid var(--vl-border);
    box-shadow: var(--vl-shadow); border-radius: 999px;
    font-size: 12.5px; font-weight: 600; color: var(--vl-ink-soft);
    padding: 6px 14px; display: none; align-items: center; gap: 7px;
}
.vl-save-indicator.show { display: inline-flex; }
.vl-save-indicator.saved { color: var(--vl-green); }
.vl-save-indicator.error { color: var(--vl-red); }

/* ── Readiness / status checks ────────────────────────────────────── */
.vl-check-item {
    display: flex; gap: 12px; align-items: flex-start;
    border-radius: 10px; padding: 11px 14px; margin-bottom: 8px;
    font-size: 14px;
}
.vl-check-item .vl-check-icon { flex: none; padding-top: 1px; }
.vl-check-item.ok      { background: var(--vl-green-soft); color: var(--vl-green); }
.vl-check-item.warning { background: var(--vl-amber-soft); color: var(--vl-amber); }
.vl-check-item.problem { background: var(--vl-red-soft);   color: var(--vl-red); }
.vl-check-item a { color: inherit; text-decoration: underline; }

/* ── Modals ───────────────────────────────────────────────────────── */
.vl-modal { display: none; position: fixed; inset: 0; z-index: 90; }
.vl-modal.open { display: block; }
.vl-modal-backdrop { position: absolute; inset: 0; background: rgba(38, 37, 31, 0.45); }
.vl-modal-card {
    position: relative; z-index: 1;
    background: var(--vl-surface); border-radius: 14px;
    box-shadow: var(--vl-shadow-lift);
    max-width: 520px; margin: 9vh auto 0; padding: 24px 26px;
    max-height: 82vh; overflow-y: auto;
}
.vl-modal-card.wide { max-width: 900px; }
.vl-modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.vl-modal-head h3 { margin: 0; }
.vl-modal-x {
    background: none; border: none; cursor: pointer;
    font-size: 17px; color: var(--vl-ink-faint); padding: 4px 8px; border-radius: 7px;
}
.vl-modal-x:hover { background: var(--vl-surface-soft); color: var(--vl-ink); }
.vl-modal-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ── Tables ───────────────────────────────────────────────────────── */
.vl-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.vl-table th {
    text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--vl-ink-faint); font-weight: 650;
    padding: 8px 12px; border-bottom: 1.5px solid var(--vl-border);
}
.vl-table td { padding: 11px 12px; border-bottom: 1px solid #f0eee8; vertical-align: middle; }
.vl-table tr:hover td { background: var(--vl-surface-soft); }

/* ── Auth pages (login / signup / reset) ──────────────────────────── */
.vl-auth-wrap { max-width: 420px; margin: 9vh auto 0; padding: 0 16px 60px; }
.vl-auth-logo { text-align: center; margin-bottom: 10px; }
.vl-auth-logo img { height: 38px; width: auto; display: inline-block; }
.vl-auth-sub  { text-align: center; color: var(--vl-ink-soft); margin-bottom: 26px; font-size: 14.5px; }
.vl-auth-card { background: var(--vl-surface); border: 1px solid var(--vl-border); border-radius: 14px; box-shadow: var(--vl-shadow); padding: 28px; }
.vl-auth-foot { text-align: center; margin-top: 18px; font-size: 14px; color: var(--vl-ink-soft); }

/* ── Empty states ─────────────────────────────────────────────────── */
.vl-empty {
    text-align: center; padding: 70px 20px; color: var(--vl-ink-soft);
}
.vl-empty .vl-empty-icon { font-size: 34px; color: var(--vl-ink-faint); margin-bottom: 12px; }

/* ── Utility spacing ──────────────────────────────────────────────── */
.mt-0 { margin-top: 0; }        .mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 6px; }      .mb-1 { margin-bottom: 6px; }
.mt-2 { margin-top: 12px; }     .mb-2 { margin-bottom: 12px; }
.mt-3 { margin-top: 18px; }     .mb-3 { margin-bottom: 18px; }
.mt-4 { margin-top: 26px; }     .mb-4 { margin-bottom: 26px; }
.vl-flex { display: flex; align-items: center; gap: 10px; }
.vl-flex-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.vl-right { margin-left: auto; }
.vl-hidden { display: none !important; }