:root {
    --color-primary: #394A8E;
    --color-primary-hover: #2c3a70;
    --color-accent: #F25E24;
    --color-accent-hover: #d94e19;
    --color-bg: #f4f5f7;
    --color-surface: #ffffff;
    --color-border: #d9dce1;
    --color-text: #1a1d23;
    --color-text-muted: #5b6472;
    --color-danger: #b3261e;
    --color-danger-bg: #fdecea;
    --color-success: #14602e;
    --color-success-bg: #e8f6ec;
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.10);
    --header-h: 60px;
    --font-heading: "Barlow", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Roboto", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

header.topbar {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--color-surface);
    border-bottom: 3px solid var(--color-accent);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 10;
}

header.topbar .brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

header.topbar .brand-logo {
    height: 34px;
    width: auto;
    display: block;
}

header.topbar .brand-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 15px;
    color: var(--color-primary);
}

header.topbar nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-left: 16px;
    cursor: pointer;
}

header.topbar nav a.active,
header.topbar nav a:hover {
    color: var(--color-primary);
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 20px 80px;
}

#page-form, #page-thankyou, #page-admin-login, #page-landing {
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
}

.page { display: none; }
.page.active { display: block; }

/* ---- Landing page ---- */

.landing-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-top: 8px;
}

.landing-image {
    max-width: 100%;
    width: 420px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.landing-cta { margin-top: 28px; }

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 700;
    font-family: var(--font-heading);
    border-radius: var(--radius-md);
}

.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.panel-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.panel-header h2 {
    margin: 0;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 16px;
    color: var(--color-primary);
}

.panel-header p {
    margin: 4px 0 0;
    font-size: 13px;
    color: var(--color-text-muted);
}

.panel-body { padding: 20px; }

.question {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.question:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.question.has-error {
    border-left: 3px solid var(--color-danger);
    background: var(--color-danger-bg);
    padding: 12px 12px 20px;
    margin-left: -13px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.question.has-error .q-title { color: var(--color-danger); }

.question > label.q-title,
.question > .q-title {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.q-title .req { color: var(--color-danger); margin-left: 2px; }
.q-hint { font-size: 12.5px; color: var(--color-text-muted); margin: 0 0 10px; }

.options { display: flex; flex-direction: column; gap: 6px; }
.options.options-2col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px 20px;
}
@media (min-width: 640px) {
    .options.options-2col {
        grid-template-columns: 1fr 1fr;
    }
}
.options label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
}
.options input { margin-top: 3px; }

input[type="text"], input[type="tel"], input[type="email"], select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
    border-color: var(--color-primary);
}

select:disabled { background: #f1f2f4; color: var(--color-text-muted); cursor: not-allowed; }

textarea { min-height: 80px; resize: vertical; }

.row-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
.other-input { margin-top: 8px; margin-left: 24px; max-width: 320px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--color-text-muted); }
.btn-danger-outline { color: var(--color-danger); border-color: var(--color-danger); background: transparent; }

.participant-block {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 16px;
    background: #fafbfc;
}
.participant-block .participant-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.participant-block .participant-head h3 { margin: 0; font-size: 14px; }

.alert {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    margin-bottom: 16px;
}
.alert-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.alert-success { background: var(--color-success-bg); color: var(--color-success); }

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 8px;
}

.center-card {
    max-width: 380px;
    margin: 80px auto 0;
}

/* ---- Admin tabs ---- */

.admin-header { display: flex; justify-content: space-between; align-items: center; }

.admin-tabs {
    display: flex;
    gap: 4px;
    padding: 0 20px;
    border-bottom: 1px solid var(--color-border);
}

.admin-tab {
    border: none;
    background: transparent;
    padding: 12px 14px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.admin-tab:hover { color: var(--color-primary); }
.admin-tab.active { color: var(--color-primary); border-bottom-color: var(--color-accent); }

.admin-tab-toolbar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 12px;
}

.admin-tab-panel { display: none; }
.admin-tab-panel.active { display: block; }

/* ---- Dashboard ---- */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 16px;
}

.dash-panel {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
}

.dash-panel h4 {
    margin: 0 0 2px;
    font-size: 13.5px;
    font-family: var(--font-heading);
    color: var(--color-primary);
}

.dash-panel .dash-count { margin: 0 0 12px; }

.dash-bars {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: 260px;
    overflow-y: auto;
}

.bar-row {
    display: grid;
    grid-template-columns: minmax(90px, 40%) 1fr auto;
    align-items: center;
    gap: 8px;
    padding: 3px 0;
}

.bar-row .bar-label {
    font-size: 12px;
    color: var(--color-text);
    line-height: 1.25;
}

.bar-row .bar-track {
    height: 14px;
    background: #eef0f7;
    border-radius: 4px;
    overflow: hidden;
}

.bar-row .bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 4px;
    min-width: 3px;
}

.bar-row .bar-value {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* ---- Spreadsheet ---- */

#spreadsheet-table { font-size: 12.5px; }
#spreadsheet-table th, #spreadsheet-table td { white-space: nowrap; padding: 6px 10px; }
#spreadsheet-table tbody tr:hover { background: #f7f8fa; }

#intro-text-body { white-space: pre-line; font-size: 14px; color: var(--color-text); }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
.data-table th, .data-table td {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}
.data-table th { color: var(--color-text-muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; }
.data-table tbody tr { cursor: pointer; }
.data-table tbody tr:hover { background: #f7f8fa; }

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 24px;
    font-size: 13.5px;
}
.detail-grid dt { color: var(--color-text-muted); margin-top: 10px; }
.detail-grid dd { margin: 0; }
.detail-grid .full { grid-column: 1 / -1; }

.tag {
    display: inline-block;
    background: #eef1f5;
    border-radius: 999px;
    padding: 2px 9px;
    font-size: 12px;
    margin: 0 4px 4px 0;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 18, 24, 0.45);
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 16px;
    z-index: 50;
    overflow-y: auto;
}
.overlay.active { display: flex; }
.modal {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    max-width: 640px;
    width: 100%;
}
.modal.modal-sm { max-width: 420px; }
.modal.modal-sm .modal-body .form-actions { margin-top: 16px; }
.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-body { padding: 20px; max-height: 70vh; overflow-y: auto; }
.modal-header h3 { margin: 0; font-size: 15px; }

.muted { color: var(--color-text-muted); }
.small { font-size: 12.5px; }