/*
 * CNS Question Paper Builder — Stylesheet
 * File: assets/css/qpb-style.css
 */

:root {
    --qpb-sky: #0ea5e9;
    --qpb-navy: #0369a1;
    --qpb-lt: #e0f2fe;
    --qpb-green: #10b981;
    --qpb-red: #ef4444;
    --qpb-amber: #f59e0b;
    --qpb-purple: #8b5cf6;
    --qpb-bg: #f0f9ff;
    --qpb-card: #fff;
    --qpb-border: #e2e8f0;
    --qpb-text: #0f172a;
    --qpb-muted: #64748b;
    --qpb-r: 12px;
    --qpb-sh: 0 2px 14px rgba(14,165,233,.09);
    --qpb-sh-lg: 0 8px 32px rgba(14,165,233,.15);
    --qpb-font: 'Noto Sans Bengali', 'Hind Siliguri', sans-serif;
}

#cns-qpb * { box-sizing: border-box; }
#cns-qpb {
    font-family: var(--qpb-font);
    color: var(--qpb-text);
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 0 80px;
}

/* ── Header ── */
.qpb-hdr {
    background: linear-gradient(135deg,#075985,#0ea5e9);
    border-radius: var(--qpb-r);
    padding: 22px 28px;
    margin-bottom: 24px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    box-shadow: var(--qpb-sh-lg);
}
.qpb-hdr-left { display: flex; align-items: center; gap: 14px; }
.qpb-hdr-icon {
    width: 50px; height: 50px;
    background: rgba(255,255,255,.18);
    border-radius: 11px;
    display: flex; align-items: center; justify-content: center;
    font-size: 21px; flex-shrink: 0;
}
.qpb-hdr h1 { margin: 0; font-size: 19px; font-weight: 800; }
.qpb-hdr p  { margin: 3px 0 0; font-size: 13px; opacity: .85; }
.qpb-tbadge {
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 8px;
    padding: 7px 13px;
    font-size: 13px;
    white-space: nowrap;
    display: flex; align-items: center; gap: 7px;
}

/* ── Steps ── */
.qpb-steps {
    display: flex;
    background: var(--qpb-card);
    border: 1px solid var(--qpb-border);
    border-radius: var(--qpb-r);
    overflow: hidden;
    box-shadow: var(--qpb-sh);
    margin-bottom: 24px;
}
.qpb-step {
    flex: 1; padding: 14px 8px; text-align: center;
    cursor: pointer; border: none; background: transparent;
    font-family: var(--qpb-font); font-size: 13px; color: var(--qpb-muted);
    display: flex; align-items: center; justify-content: center; gap: 8px;
    border-right: 1px solid var(--qpb-border); transition: all .2s;
}
.qpb-step:last-child { border-right: none; }
.qpb-snum {
    width: 26px; height: 26px; border-radius: 50%;
    background: var(--qpb-border);
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 12px; flex-shrink: 0; transition: all .2s;
}
.qpb-step.active  { color: var(--qpb-navy); background: var(--qpb-lt); font-weight: 700; }
.qpb-step.active .qpb-snum { background: var(--qpb-sky); color: #fff; }
.qpb-step.done    { color: var(--qpb-green); }
.qpb-step.done .qpb-snum { background: var(--qpb-green); color: #fff; }
@media (max-width: 600px) { .qpb-slabel { display: none; } }

/* ── Cards ── */
.qpb-card {
    background: var(--qpb-card);
    border: 1px solid var(--qpb-border);
    border-radius: var(--qpb-r);
    padding: 22px;
    margin-bottom: 18px;
    box-shadow: var(--qpb-sh);
}
.qpb-ctitle {
    font-size: 14px; font-weight: 800; color: var(--qpb-navy);
    margin: 0 0 18px; padding-bottom: 12px;
    border-bottom: 2px solid var(--qpb-lt);
    display: flex; align-items: center; gap: 8px;
}

/* ── Grid / Fields ── */
.qpb-g2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.qpb-g3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .qpb-g2, .qpb-g3 { grid-template-columns: 1fr; } }
.qpb-f { display: flex; flex-direction: column; gap: 5px; }
.qpb-f label {
    font-size: 11px; font-weight: 700; color: var(--qpb-muted);
    text-transform: uppercase; letter-spacing: .04em;
}
.qpb-f input,
.qpb-f select,
.qpb-f textarea {
    border: 1.5px solid var(--qpb-border); border-radius: 8px; padding: 9px 12px;
    font-size: 14px; font-family: var(--qpb-font); color: var(--qpb-text);
    background: #fff; transition: border-color .2s, box-shadow .2s; width: 100%;
}
.qpb-f input:focus,
.qpb-f select:focus,
.qpb-f textarea:focus {
    outline: none;
    border-color: var(--qpb-sky);
    box-shadow: 0 0 0 3px rgba(14,165,233,.12);
}
.qpb-f textarea { resize: vertical; min-height: 78px; }

/* ── Buttons ── */
.qpb-btn {
    display: inline-flex; align-items: center; gap: 7px; padding: 9px 17px;
    border-radius: 8px; font-size: 13px; font-weight: 700; cursor: pointer;
    border: none; font-family: var(--qpb-font); transition: all .2s; text-decoration: none;
}
.qpb-primary { background: var(--qpb-sky); color: #fff; }
.qpb-primary:hover { background: var(--qpb-navy); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(14,165,233,.3); }
.qpb-success { background: var(--qpb-green); color: #fff; }
.qpb-success:hover { background: #059669; }
.qpb-danger  { background: var(--qpb-red); color: #fff; }
.qpb-danger:hover  { background: #dc2626; }
.qpb-purple  { background: var(--qpb-purple); color: #fff; }
.qpb-purple:hover  { background: #7c3aed; }
.qpb-ghost   { background: transparent; color: var(--qpb-muted); border: 1.5px solid var(--qpb-border); }
.qpb-ghost:hover   { background: var(--qpb-bg); border-color: var(--qpb-sky); color: var(--qpb-sky); }
.qpb-btn-sm  { padding: 6px 11px; font-size: 12px; }
.qpb-btn-lg  { padding: 12px 26px; font-size: 15px; }
.qpb-btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }

/* ── Set Tabs ── */
.qpb-settabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.qpb-stab {
    padding: 8px 18px; border-radius: 8px; border: 2px solid var(--qpb-border);
    background: #fff; font-weight: 800; font-size: 14px; cursor: pointer;
    transition: all .2s; font-family: var(--qpb-font);
    display: flex; align-items: center; gap: 7px; color: var(--qpb-muted);
}
.qpb-stab.active { border-color: var(--qpb-sky); background: var(--qpb-lt); color: var(--qpb-navy); }
.qpb-stab .cnt { background: var(--qpb-sky); color: #fff; border-radius: 20px; padding: 1px 8px; font-size: 11px; }
.qpb-stab:not(.active) .cnt { background: var(--qpb-border); color: var(--qpb-muted); }

/* ── Q-Type buttons ── */
.qpb-qtbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; align-items: center; }
.qpb-qt {
    padding: 8px 13px; border-radius: 8px; border: 2px dashed var(--qpb-border);
    background: #fff; font-size: 13px; font-weight: 700; cursor: pointer;
    transition: all .2s; display: flex; align-items: center; gap: 6px;
    color: var(--qpb-muted); font-family: var(--qpb-font);
}
.qpb-qt:hover { border-style: solid; }
.qpb-qt.t-mcq:hover      { border-color: var(--qpb-sky);    color: var(--qpb-sky);    background: var(--qpb-lt); }
.qpb-qt.t-cq:hover       { border-color: var(--qpb-purple); color: var(--qpb-purple); background: #f5f3ff; }
.qpb-qt.t-short:hover    { border-color: var(--qpb-green);  color: var(--qpb-green);  background: #ecfdf5; }
.qpb-qt.t-fitb:hover     { border-color: var(--qpb-amber);  color: var(--qpb-amber);  background: #fffbeb; }
.qpb-qt.t-truefalse:hover{ border-color: #9d174d;           color: #9d174d;           background: #fce7f3; }
.qpb-qt.t-long:hover     { border-color: #713f12;           color: #713f12;           background: #fef9c3; }
.qpb-qt.t-generic:hover  { border-color: #3730a3;           color: #3730a3;           background: #e0e7ff; }

/* ── Question Items ── */
.qpb-qlist { display: flex; flex-direction: column; gap: 10px; }
.qpb-qi {
    background: #f8fafc; border: 1.5px solid var(--qpb-border);
    border-radius: 10px; padding: 14px 16px; transition: box-shadow .2s;
}
.qpb-qi:hover { box-shadow: var(--qpb-sh); }
.qpb-qih { display: flex; align-items: flex-start; gap: 10px; }
.qpb-qbadge {
    font-size: 10px; font-weight: 800; padding: 2px 8px; border-radius: 20px;
    white-space: nowrap; flex-shrink: 0; margin-top: 3px;
}
.qpb-qbadge.mcq       { background: #dbeafe; color: #1d4ed8; }
.qpb-qbadge.cq        { background: #ede9fe; color: #6d28d9; }
.qpb-qbadge.short     { background: #d1fae5; color: #065f46; }
.qpb-qbadge.fitb      { background: #fef3c7; color: #92400e; }
.qpb-qbadge.truefalse { background: #fce7f3; color: #9d174d; }
.qpb-qbadge.generic   { background: #e0e7ff; color: #3730a3; }
.qpb-qbadge.long      { background: #fef9c3; color: #713f12; }
.qpb-generic-items { margin-top: 7px; display: flex; flex-direction: column; gap: 4px; }
.qpb-generic-item {
    font-size: 12.5px; padding: 4px 10px;
    border-left: 3px solid #a5b4fc; background: #f5f3ff;
    border-radius: 0 6px 6px 0;
    display: flex; justify-content: space-between; align-items: flex-start; gap: 8px;
}
.qpb-generic-ans { font-size: 11px; color: #6d28d9; font-weight: 700; white-space: nowrap; flex-shrink: 0; }
.qpb-qnum {
    width: 26px; height: 26px; border-radius: 50%; background: var(--qpb-sky); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 800; flex-shrink: 0;
}
.qpb-qtext   { flex: 1; font-size: 13.5px; line-height: 1.55; }
.qpb-qmarks  { font-size: 11px; font-weight: 800; color: var(--qpb-muted); white-space: nowrap; flex-shrink: 0; }
.qpb-qacts   { display: flex; gap: 5px; flex-shrink: 0; }
.qpb-qopts   { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-top: 8px; }
.qpb-qopt {
    font-size: 12.5px; padding: 4px 9px; border-radius: 6px;
    background: #fff; border: 1px solid var(--qpb-border);
    display: flex; align-items: center; gap: 5px;
}
.qpb-qopt.iscorrect { background: #d1fae5; border-color: #10b981; color: #065f46; font-weight: 700; }
.qpb-qsubqs { margin-top: 9px; display: flex; flex-direction: column; gap: 5px; }
.qpb-qsubq {
    font-size: 12.5px; padding: 5px 10px;
    border-left: 3px solid var(--qpb-purple);
    background: #f5f3ff; border-radius: 0 6px 6px 0;
    display: flex; justify-content: space-between; align-items: center;
}
.qpb-sechead {
    background: var(--qpb-lt); border: 1px solid #bae6fd;
    border-radius: 8px; padding: 9px 14px;
    display: flex; align-items: center; justify-content: space-between;
    margin: 14px 0 6px; font-weight: 800; font-size: 13px; color: var(--qpb-navy);
}

/* ── AI Panel ── */
.qpb-ai {
    background: linear-gradient(135deg,#fdf4ff,#f0f9ff);
    border: 2px solid #d8b4fe;
    border-radius: var(--qpb-r);
    padding: 18px; margin-bottom: 18px;
}
.qpb-ai-title { font-size: 14px; font-weight: 800; color: #7c3aed; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
.qpb-ai-title i { font-size: 18px; }

/* ── Alerts ── */
.qpb-alert { padding: 11px 15px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; display: flex; align-items: flex-start; gap: 9px; }
.al-info { background: #e0f2fe; border: 1px solid #7dd3fc; color: #0c4a6e; }
.al-ok   { background: #d1fae5; border: 1px solid #6ee7b7; color: #064e3b; }
.al-warn { background: #fef3c7; border: 1px solid #fcd34d; color: #78350f; }
.al-err  { background: #fee2e2; border: 1px solid #fca5a5; color: #7f1d1d; }

/* ── Spinner ── */
.qpb-spin {
    display: inline-block; width: 15px; height: 15px;
    border: 2.5px solid rgba(255,255,255,.4); border-top-color: #fff;
    border-radius: 50%; animation: qspin .7s linear infinite;
}
@keyframes qspin { to { transform: rotate(360deg); } }

/* ── Nav ── */
.qpb-nav {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--qpb-border);
}

/* ── Modal ── */
.qpb-moverlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.52);
    z-index: 99999; display: flex; align-items: flex-start;
    justify-content: center; padding: 36px 16px; overflow-y: auto;
}
.qpb-mdl {
    background: #fff; border-radius: 16px; padding: 26px;
    width: 100%; max-width: 640px; box-shadow: 0 20px 60px rgba(0,0,0,.22); position: relative;
}
.qpb-mtitle {
    font-size: 16px; font-weight: 800; margin: 0 0 18px; padding-bottom: 13px;
    border-bottom: 2px solid var(--qpb-lt); display: flex; align-items: center; gap: 9px;
}
.qpb-mclose {
    position: absolute; top: 14px; right: 14px;
    background: none; border: none; cursor: pointer; font-size: 19px;
    color: var(--qpb-muted); width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center; border-radius: 6px;
}
.qpb-mclose:hover { background: var(--qpb-bg); }
.qpb-mfoot { display: flex; justify-content: flex-end; gap: 9px; margin-top: 18px; }
.qpb-optrow { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.qpb-optlbl {
    width: 28px; height: 28px; border-radius: 6px; background: var(--qpb-bg);
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; flex-shrink: 0; border: 1px solid var(--qpb-border);
}

/* ── Logo uploader ── */
.qpb-logo-drop {
    border: 2px dashed var(--qpb-border); border-radius: 10px; padding: 18px;
    text-align: center; cursor: pointer; transition: all .2s;
}
.qpb-logo-drop:hover { border-color: var(--qpb-sky); background: var(--qpb-lt); }

/* ── Stats ── */
.qpb-stats { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.qpb-stat {
    background: var(--qpb-bg); border: 1px solid var(--qpb-border);
    border-radius: 8px; padding: 9px 15px; text-align: center; min-width: 90px;
}
.qpb-stat-n { font-size: 20px; font-weight: 900; color: var(--qpb-navy); }
.qpb-stat-l { font-size: 11px; color: var(--qpb-muted); font-weight: 700; }

/* ── Empty ── */
.qpb-empty { text-align: center; padding: 36px 16px; color: var(--qpb-muted); }
.qpb-empty i { font-size: 2.2rem; opacity: .35; display: block; margin-bottom: 10px; }

/* ── Checkbox ── */
.qpb-chk { display: flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; }
.qpb-chk input[type=checkbox] { width: 17px; height: 17px; cursor: pointer; }

/* ── Preview ── */
.qpb-preview-wrap { background: #f0f9ff; border-radius: 10px; padding: 20px; border: 1px solid #bae6fd; }
.qpb-paper {
    font-family: 'Noto Sans Bengali', 'Noto Serif Bengali', sans-serif;
    background: #fff; border: 2px solid var(--qpb-sky); border-radius: 10px;
    margin-bottom: 24px; overflow: hidden;
}
.qpb-paper-hdr { text-align: center; padding: 18px 22px 14px; border-bottom: 2px solid var(--qpb-sky); }
.qpb-paper-sec { padding: 14px 20px; }

/* ── Math equation display ── */
.qpb-math-inline .katex { font-size: 1em; }
.qpb-math-block  { text-align: center; margin: 8px 0; overflow-x: auto; }
.qpb-math-block .katex-display { margin: 0; }

/* ── @print ── */
@media print {
    body > * { display: none !important; }
    #qpb-printarea { display: block !important; position: static !important; }
}
#qpb-printarea { display: none; }