:root {
    --sky: #0ea5e9;
    --sky-dark: #0284c7;
    --sky-soft: #e0f2fe;
    --sky-softer: #f0f9ff;
    --ink: #0f172a;
    --ink-soft: #475569;
    --ink-faint: #94a3b8;
    --line: #e2e8f0;
    --bg: #ffffff;
    --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 28px;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    z-index: 10;
}

.brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.brand-mark { color: var(--sky); }

/* The transparent logo PNG carries built-in padding, so it renders slightly larger
   than the optical size to compensate. */
.brand-logo { height: 30px; width: 30px; vertical-align: -9px; margin-right: -2px; }

.auth-logo { display: block; width: 76px; height: 76px; margin: 0 auto 4px; }

.topbar nav { display: flex; gap: 6px; }

.topbar nav a {
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 7px 14px;
    border-radius: 999px;
}

.topbar nav a:hover { background: var(--sky-softer); color: var(--sky-dark); }
.topbar nav a.active { background: var(--sky-soft); color: var(--sky-dark); }

@media (max-width: 640px) {
    .topbar {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        padding: 12px 12px 10px;
    }
    .topbar nav { justify-content: center; flex-wrap: wrap; gap: 2px; }
    .topbar nav a { padding: 6px 10px; font-size: 13px; }
    .brand { font-size: 18px; }
}

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

.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.stat {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 14px;
    text-align: center;
}

.stat strong { display: block; font-size: 22px; letter-spacing: -0.02em; }
.stat span { font-size: 12px; color: var(--ink-faint); }

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}

.admin-table th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ink-faint);
    padding: 6px 10px 6px 0;
    border-bottom: 1px solid var(--line);
}

.admin-table td {
    padding: 8px 10px 8px 0;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

.admin-table tr:last-child td { border-bottom: none; }

.admin-table code {
    background: var(--sky-softer);
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 700;
}

/* ---- Auth & trial gate ---- */

.signed-out .topbar nav a { display: none; }
.signed-out .topbar .info-btn { display: none; }

.auth-card {
    max-width: 400px;
    margin: 8vh auto 0;
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 36px 32px;
    box-shadow: 0 16px 44px rgba(2, 132, 199, 0.08);
}

.auth-card h1 { font-size: 22px; margin-bottom: 6px; }
.auth-card .subtitle { margin-bottom: 22px; }

.code-input {
    width: 100%;
    text-align: center;
    font-size: 28px;
    letter-spacing: 12px;
    font-weight: 700;
}

.trial-list { list-style: none; margin: 0 0 22px; }

.trial-list li {
    padding: 6px 0 6px 26px;
    position: relative;
    font-size: 14px;
    color: var(--ink-soft);
}

.trial-list li::before { content: "✓"; position: absolute; left: 2px; color: var(--sky); font-weight: 800; }

/* ---- AI suggestion preview ---- */

.suggestion-card {
    background: var(--sky-softer);
    border: 1px solid var(--sky-soft);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-top: 14px;
}

.suggestion-weeks { padding-left: 20px; }

.suggestion-weeks li { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 4px; }
.suggestion-weeks li strong { color: var(--ink); }
.suggestion-weeks li::marker { color: var(--sky); font-weight: 700; }

.suggestion-card .ai-rewrite { background: #fff; }

/* ---- Info modal ---- */

.info-btn {
    width: 30px;
    height: 30px;
    padding: 0;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 14px;
    font-weight: 700;
    align-self: center;
    flex-shrink: 0;
}

.info-btn:hover { background: var(--sky-softer); color: var(--sky-dark); border-color: var(--sky); }

#info-modal {
    border: none;
    border-radius: 18px;
    padding: 0;
    margin: auto;
    max-width: 580px;
    width: calc(100vw - 40px);
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
}

#info-modal::backdrop { background: rgba(15, 23, 42, 0.4); }

.info-content { padding: 26px 28px 28px; }

.info-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.info-head h2 { margin: 0; font-size: 20px; }

.info-content p { font-size: 14.5px; color: var(--ink-soft); margin-bottom: 16px; }

.info-content h3 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--sky-dark);
    margin: 18px 0 8px;
}

.info-steps, .info-list { padding-left: 22px; margin-bottom: 8px; }

.info-steps li, .info-list li {
    font-size: 14px;
    color: var(--ink-soft);
    margin-bottom: 8px;
}

.info-steps li::marker { color: var(--sky); font-weight: 700; }
.info-list { list-style: none; padding-left: 4px; }
.info-list li { padding-left: 18px; position: relative; }
.info-list li::before { content: "✦"; color: var(--sky); position: absolute; left: 0; font-size: 11px; top: 3px; }

.info-content strong, .info-steps strong { color: var(--ink); }

main { max-width: 860px; margin: 0 auto; padding: 36px 24px 80px; }

h1 { font-size: 26px; letter-spacing: -0.02em; margin-bottom: 4px; }
h2 { font-size: 18px; letter-spacing: -0.01em; margin-bottom: 12px; }
.subtitle { color: var(--ink-soft); font-size: 15px; margin-bottom: 28px; }

.card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin-bottom: 16px;
    background: #fff;
}

.card.clickable { cursor: pointer; transition: border-color 0.15s, box-shadow 0.15s; }
.card.clickable:hover { border-color: var(--sky); box-shadow: 0 2px 12px rgba(14, 165, 233, 0.08); }

button, .btn {
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    cursor: pointer;
    background: var(--sky);
    color: #fff;
}

button:hover, .btn:hover { background: var(--sky-dark); }
button:disabled { opacity: 0.5; cursor: default; }

button.ghost {
    background: transparent;
    color: var(--sky-dark);
    border: 1px solid var(--line);
}

button.ghost:hover { background: var(--sky-softer); }

button.tiny { padding: 4px 10px; font-size: 12px; border-radius: 8px; }

input, select {
    font: inherit;
    font-size: 14px;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--ink);
}

input:focus, select:focus { outline: 2px solid var(--sky-soft); border-color: var(--sky); }

label { font-size: 13px; font-weight: 600; color: var(--ink-soft); display: block; margin-bottom: 5px; }

.field { margin-bottom: 16px; }
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }

.pill {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    background: var(--sky-soft);
    color: var(--sky-dark);
}

.pill.muted { background: #f1f5f9; color: var(--ink-faint); }

.week-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-top: 1px solid var(--line);
}

.week-row:first-of-type { border-top: none; }

.tabs { display: flex; gap: 8px; margin: 20px 0; flex-wrap: wrap; }

.tabs button {
    background: transparent;
    color: var(--ink-soft);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 8px 18px;
}

.tabs button.active { background: var(--sky); color: #fff; border-color: var(--sky); }

.block {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
}

.block-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    cursor: pointer;
    user-select: none;
}

.block-head:hover { background: var(--sky-softer); }
.block.done .block-head { opacity: 0.55; }
.block.done .block-title { text-decoration: line-through; }

.block-check {
    width: 22px;
    height: 22px;
    border: 2px solid var(--line);
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    font-size: 13px;
}

.block.done .block-check { background: var(--sky); border-color: var(--sky); color: #fff; }

.block-title { font-weight: 600; font-size: 15px; }
.block-kind { font-size: 12px; color: var(--ink-faint); }
.block-mins { margin-left: auto; font-size: 13px; color: var(--ink-faint); flex-shrink: 0; }

.block-body { padding: 4px 18px 18px 52px; }

.block-body ol { padding-left: 18px; }
.block-body li { margin-bottom: 6px; font-size: 14.5px; }

.materials { font-size: 13px; color: var(--ink-soft); margin-bottom: 10px; }
.materials strong { color: var(--ink); }

.littles {
    margin-top: 12px;
    font-size: 13.5px;
    background: var(--sky-softer);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--ink-soft);
}

.littles strong { color: var(--sky-dark); }

.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }

@media (max-width: 640px) { .info-grid { grid-template-columns: 1fr; } }

.info-grid .card { margin-bottom: 0; }

.supplies-list { columns: 2; font-size: 14px; color: var(--ink-soft); padding-left: 18px; }

@media (max-width: 640px) { .supplies-list { columns: 1; } }

.sched-day { margin-bottom: 20px; }

.sched-blocks { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }

.sched-block {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 7px 12px;
    background: #fff;
}

.sched-block .grow { flex: 1; }
.sched-block .mins { color: var(--ink-faint); font-size: 12px; }

.icon-btn {
    background: transparent;
    color: var(--ink-faint);
    padding: 2px 6px;
    font-size: 14px;
    border-radius: 6px;
}

.icon-btn:hover { background: #f1f5f9; color: var(--ink); }

.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--ink-faint);
}

.empty .big { font-size: 40px; margin-bottom: 12px; }

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: -3px;
    margin-right: 8px;
}

.spinner.dark { border-color: var(--sky-soft); border-top-color: var(--sky); }

@keyframes spin { to { transform: rotate(360deg); } }

.error-banner {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 14px;
}

.back-link { font-size: 14px; color: var(--sky-dark); text-decoration: none; display: inline-block; margin-bottom: 16px; }
.back-link:hover { text-decoration: underline; }

.learner-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 8px 6px 14px;
    font-size: 14px;
    margin: 0 8px 8px 0;
}

/* ---- Today view ---- */

.today-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.today-actions { display: flex; gap: 10px; }

.gather {
    background: var(--sky-softer);
    border: 1px solid var(--sky-soft);
    border-radius: var(--radius);
    padding: 14px 18px;
    font-size: 14px;
    margin-bottom: 20px;
    color: var(--ink-soft);
}

.gather strong { color: var(--sky-dark); }

/* ---- Block edit form ---- */

.block-edit { padding: 4px 18px 18px 52px; }

.block-edit textarea {
    font: inherit;
    font-size: 14px;
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    resize: vertical;
}

.block-edit textarea:focus { outline: 2px solid var(--sky-soft); border-color: var(--sky); }

.block-edit .field { margin-bottom: 12px; }

.ai-rewrite {
    display: flex;
    gap: 8px;
    background: var(--sky-softer);
    border-radius: 10px;
    padding: 10px;
    margin-top: 14px;
}

.ai-rewrite input { flex: 1; }

.edit-btn { visibility: hidden; }
.block-head:hover .edit-btn { visibility: visible; }

/* ---- Print (day sheets) ---- */

.print-header { display: none; }

@media print {
    .topbar, .tabs, .back-link, .today-actions, .info-grid, .gather-hide-print,
    button, .subtitle .no-print, .error-banner { display: none !important; }
    .print-header {
        display: block;
        font-size: 13px;
        color: #555;
        border-bottom: 1px solid #ccc;
        padding-bottom: 8px;
        margin-bottom: 14px;
    }
    .print-header .ph-title { font-size: 17px; font-weight: 700; color: #000; }
    main { max-width: 100%; padding: 0; }
    h1, .subtitle { display: none; }
    .gather { background: none; border: 1px solid #ccc; padding: 8px 12px; margin-bottom: 12px; }
    .block { break-inside: avoid; border-color: #ccc; margin-bottom: 8px; }
    .block-head { padding: 8px 12px; }
    .block-check { border-color: #999; }
    .block-body { padding: 0 12px 10px 42px; }
    .littles { background: none; border-left: 3px solid #ccc; border-radius: 0; padding: 4px 10px; }
    .block.done .block-head { opacity: 1; }
    .block.done .block-title { text-decoration: none; }
}