/* ═══════════════════════════════════════════
   OpoEnfermería — Estilos principales
   ═══════════════════════════════════════════ */

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

:root {
  --primary: #4f8ef7;
  --primary-dark: #3a78e0;
  --success: #2ecc71;
  --danger: #e74c3c;
  --warning: #f39c12;
  --info: #8e44ad;
  --bg: #f5f7fb;
  --card: #ffffff;
  --border: #e8ecf2;
  --text: #1a2332;
  --text-muted: #6b7a8d;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
}

body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }

/* ── NAVBAR ── */
.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}
.nav-brand { font-weight: 700; font-size: 1.1rem; color: var(--primary); display: flex; align-items: center; gap: .5rem; }
.nav-icon { font-size: 1.3rem; }
.nav-links { display: flex; gap: .25rem; }
.nav-link { text-decoration: none; color: var(--text-muted); padding: .5rem .85rem; border-radius: 8px; font-size: .9rem; font-weight: 500; transition: all .2s; }
.nav-link:hover, .nav-link.active { background: #f0f4ff; color: var(--primary); }

/* ── LAYOUT ── */
.main-content { max-width: 1200px; margin: 0 auto; padding: 2rem 1.5rem; }
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 1.75rem; font-weight: 700; }
.page-header .subtitle { color: var(--text-muted); margin-top: .25rem; }

/* ── CARDS ── */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.5rem; border: 1px solid var(--border); }
.card-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 1.25rem; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 1.5rem; }
@media (max-width: 768px) { .row-2 { grid-template-columns: 1fr; } }

/* ── STAT CARDS ── */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
@media (max-width: 900px) { .stats-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 500px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

.stat-card { background: var(--card); border-radius: var(--radius); padding: 1.25rem; display: flex; align-items: center; gap: 1rem; box-shadow: var(--shadow); border: 1px solid var(--border); border-left: 4px solid; }
.stat-card.primary { border-left-color: var(--primary); }
.stat-card.success { border-left-color: var(--success); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card.info { border-left-color: var(--info); }
.stat-icon { font-size: 1.8rem; }
.stat-value { font-size: 1.6rem; font-weight: 700; }
.stat-label { color: var(--text-muted); font-size: .85rem; }
.stat-sub { font-size: .75rem; color: var(--text-muted); }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .6rem 1.2rem; border-radius: 8px; border: 2px solid transparent; font-weight: 600; font-size: .9rem; cursor: pointer; transition: all .2s; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,142,247,.3); }
.btn-secondary { background: #f0f4ff; color: var(--primary); border-color: #dce6ff; }
.btn-secondary:hover { background: #dce6ff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-danger-outline { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-danger-outline:hover { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #e67e22; }
.btn-lg { padding: .85rem 1.8rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }
.btn-group { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn-icon { background: none; border: none; cursor: pointer; font-size: 1.1rem; padding: .3rem; border-radius: 6px; }
.btn-icon:hover { background: var(--border); }

/* ── BADGES ── */
.badge { background: #f0f4ff; color: var(--primary); border-radius: 6px; padding: .2rem .6rem; font-size: .8rem; font-weight: 600; }
.score-badge { padding: .25rem .6rem; border-radius: 6px; font-weight: 700; font-size: .9rem; }
.score-badge.pass { background: #d4f5e6; color: #1a7a46; }
.score-badge.fail { background: #fde8e8; color: #c0392b; }
.fail-badge { background: #fde8e8; color: #c0392b; border-radius: 6px; padding: .2rem .5rem; font-size: .8rem; font-weight: 600; }
.cat-badge { background: #f0f4ff; color: var(--primary); border-radius: 6px; padding: .2rem .55rem; font-size: .78rem; font-weight: 600; }
.cat-mini { font-size: .75rem; color: var(--text-muted); }

/* ── TABLES ── */
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th { text-align: left; padding: .75rem 1rem; border-bottom: 2px solid var(--border); color: var(--text-muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; }
.table td { padding: .7rem 1rem; border-bottom: 1px solid var(--border); }
.table tbody tr:hover { background: #f9faff; }
.td-correct { color: #1a7a46; font-weight: 700; }
.td-wrong { color: #c0392b; font-weight: 700; }
.td-blank { color: var(--text-muted); }
.td-id { color: var(--text-muted); font-size: .85rem; }
.td-time { font-size: .85rem; color: var(--text-muted); }

/* ── FORMS ── */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .6rem; }
.form-select { width: 100%; padding: .65rem 1rem; border: 2px solid var(--border); border-radius: 8px; font-size: .95rem; background: var(--card); outline: none; transition: border-color .2s; }
.form-select:focus { border-color: var(--primary); }

/* ── DASHBOARD ── */
.category-row { display: flex; justify-content: space-between; align-items: center; padding: .75rem 0; border-bottom: 1px solid var(--border); }
.category-row:last-child { border: none; }
.cat-count { font-weight: 600; color: var(--primary); }
.weak-item { padding: .75rem 0; border-bottom: 1px solid var(--border); }
.weak-item:last-child { border: none; }
.weak-text { font-size: .9rem; margin-bottom: .3rem; }
.weak-stats { display: flex; gap: .5rem; align-items: center; }
.empty-msg { color: var(--text-muted); font-style: italic; }
.link-small { font-size: .85rem; color: var(--primary); text-decoration: none; }
.chart-note { font-size: .8rem; color: var(--text-muted); margin-top: .5rem; text-align: center; }

/* ── EXAM CONFIG ── */
.exam-config-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem; }
@media (max-width: 900px) { .exam-config-grid { grid-template-columns: 1fr; } }
.config-card, .info-card { }

.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.mode-option { border: 2px solid var(--border); border-radius: 10px; padding: 1rem; cursor: pointer; transition: all .2s; display: flex; flex-direction: column; align-items: center; text-align: center; gap: .25rem; }
.mode-option:hover { border-color: var(--primary); background: #f0f4ff; }
.mode-option.selected { border-color: var(--primary); background: #f0f4ff; box-shadow: 0 0 0 3px rgba(79,142,247,.15); }
.mode-icon { font-size: 1.8rem; }
.mode-name { font-weight: 600; font-size: .95rem; }
.mode-desc { font-size: .8rem; color: var(--text-muted); }

.num-options { display: flex; gap: .75rem; }
.num-opt { flex: 1; border: 2px solid var(--border); border-radius: 8px; padding: .75rem; cursor: pointer; text-align: center; transition: all .2s; display: flex; flex-direction: column; align-items: center; gap: .2rem; }
.num-opt strong { font-size: 1.3rem; }
.num-opt span { font-size: .8rem; color: var(--text-muted); }
.num-opt.selected, .num-opt:hover { border-color: var(--primary); background: #f0f4ff; }

.timer-options { display: flex; gap: .75rem; }
.timer-opt { flex: 1; border: 2px solid var(--border); border-radius: 8px; padding: .6rem 1rem; cursor: pointer; text-align: center; font-weight: 500; font-size: .9rem; transition: all .2s; }
.timer-opt.selected, .timer-opt:hover { border-color: var(--primary); background: #f0f4ff; color: var(--primary); }

.info-box { background: #f9faff; border-radius: 8px; padding: 1rem; margin-bottom: 1rem; border: 1px solid var(--border); }
.info-box h3 { font-size: .9rem; font-weight: 600; margin-bottom: .5rem; }
.info-box ul { list-style: none; font-size: .88rem; }
.info-box ul li { padding: .2rem 0; }
.info-box p { font-size: .82rem; color: var(--text-muted); margin-top: .5rem; }
.info-stat { display: flex; justify-content: space-between; font-size: .88rem; padding: .2rem 0; }
.error-msg { color: var(--danger); font-size: .9rem; padding: .5rem 0; }

/* ── EXAM INTERFACE ── */
.exam-wrapper { display: grid; grid-template-columns: 1fr 280px; grid-template-rows: auto auto 1fr; gap: 0; min-height: calc(100vh - 60px); margin: -2rem -1.5rem; }
.exam-topbar { grid-column: 1/-1; background: var(--card); border-bottom: 1px solid var(--border); padding: 1rem 1.5rem; display: flex; align-items: center; justify-content: space-between; }
.exam-progress-info { display: flex; align-items: center; gap: .75rem; font-weight: 600; }
.reserve-badge { background: #fff3e0; color: var(--warning); border-radius: 6px; padding: .2rem .6rem; font-size: .82rem; font-weight: 600; }
.exam-timer { font-size: 1.1rem; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; }

.progress-bar-wrapper { grid-column: 1/-1; height: 4px; background: var(--border); }
.progress-bar { height: 100%; background: var(--primary); transition: width .4s ease; }

.exam-body { padding: 2rem; display: flex; flex-direction: column; }
.question-panel { flex: 1; background: var(--card); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); border: 1px solid var(--border); }
.question-category-tag { display: inline-block; background: #f0f4ff; color: var(--primary); border-radius: 6px; padding: .2rem .7rem; font-size: .8rem; font-weight: 600; margin-bottom: 1rem; }
.question-text { font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.75rem; font-weight: 500; }
.options-grid { display: grid; gap: .75rem; }
.option-btn { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem 1.25rem; border: 2px solid var(--border); border-radius: 10px; background: var(--card); cursor: pointer; text-align: left; width: 100%; transition: all .2s; font-size: .95rem; }
.option-btn:hover { border-color: var(--primary); background: #f8f9ff; }
.option-btn.selected { border-color: var(--primary); background: #f0f4ff; box-shadow: 0 0 0 3px rgba(79,142,247,.15); }
.opt-letter { min-width: 28px; height: 28px; border-radius: 50%; background: var(--border); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .85rem; text-transform: uppercase; flex-shrink: 0; }
.option-btn.selected .opt-letter { background: var(--primary); color: #fff; }
.opt-text { flex: 1; line-height: 1.5; }

.exam-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 1.5rem; }
.flagBtn.flagged { background: #fff3e0 !important; color: var(--warning) !important; border-color: var(--warning) !important; }

.question-map-wrapper { background: var(--card); border-left: 1px solid var(--border); padding: 1rem; overflow-y: auto; }
.question-map-header { font-weight: 600; font-size: .9rem; margin-bottom: .75rem; }
.map-legend { display: flex; flex-direction: column; gap: .2rem; margin-top: .5rem; font-size: .75rem; color: var(--text-muted); }
.legend-item { display: flex; align-items: center; gap: .4rem; }
.map-section-label { font-size: .75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin: .75rem 0 .4rem; }
.reserve-label { color: var(--warning); }
.question-map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; margin-bottom: .5rem; }
.map-btn { aspect-ratio: 1; border: 1.5px solid var(--border); border-radius: 6px; background: var(--card); cursor: pointer; font-size: .8rem; font-weight: 600; color: var(--text-muted); transition: all .15s; }
.map-btn:hover { border-color: var(--primary); color: var(--primary); }
.map-btn.current { border-color: var(--primary); background: var(--primary); color: #fff; }
.map-btn.answered { border-color: var(--success); background: #d4f5e6; color: #1a7a46; }
.map-btn.flagged { border-color: var(--warning); background: #fff3e0; color: var(--warning); }
.map-btn.current.answered { background: var(--primary); border-color: var(--primary); color: #fff; }

/* Finish modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex; align-items: center; justify-content: center; z-index: 200; }
.modal { background: var(--card); border-radius: var(--radius); padding: 2rem; max-width: 500px; width: 90%; box-shadow: var(--shadow-lg); }
.modal-lg { max-width: 700px; max-height: 85vh; display: flex; flex-direction: column; padding: 0; }
.modal-header { padding: 1.5rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding: 1.5rem; overflow-y: auto; flex: 1; }
.modal-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border); }
.modal-close { background: none; border: none; font-size: 1.2rem; cursor: pointer; color: var(--text-muted); padding: .25rem; }
.modal h2 { font-size: 1.15rem; margin-bottom: 1.25rem; }
.finish-stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin-bottom: 1.5rem; }
.finish-stat { background: #f9faff; border-radius: 8px; padding: 1rem; text-align: center; border: 1px solid var(--border); }
.finish-stat span { display: block; color: var(--text-muted); font-size: .85rem; }
.finish-stat strong { display: block; font-size: 1.5rem; font-weight: 700; }
.modal-note { font-size: .85rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.modal-btns { display: flex; gap: 1rem; }

/* ── RESULTS ── */
.results-hero { background: var(--card); border-radius: var(--radius); padding: 2rem; margin-bottom: 1.5rem; display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; box-shadow: var(--shadow); border: 1px solid var(--border); }
.score-circle { width: 140px; height: 140px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; flex-shrink: 0; }
.score-circle.pass { background: #d4f5e6; border: 6px solid var(--success); }
.score-circle.fail { background: #fde8e8; border: 6px solid var(--danger); }
.score-big { font-size: 2.5rem; font-weight: 800; line-height: 1; }
.score-circle.pass .score-big { color: #1a7a46; }
.score-circle.fail .score-big { color: #c0392b; }
.score-of { font-size: 1rem; color: var(--text-muted); }
.score-label { font-size: .75rem; font-weight: 700; letter-spacing: .1em; margin-top: .25rem; }
.score-circle.pass .score-label { color: #1a7a46; }
.score-circle.fail .score-label { color: #c0392b; }

.results-breakdown { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.result-stat { text-align: center; }
.rs-value { display: block; font-size: 2rem; font-weight: 800; }
.rs-label { font-size: .85rem; color: var(--text-muted); }
.result-stat.correct .rs-value { color: #1a7a46; }
.result-stat.wrong .rs-value { color: #c0392b; }

.results-meta { flex: 1; min-width: 180px; }
.meta-row { display: flex; justify-content: space-between; padding: .5rem 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.meta-row:last-child { border: none; }

.results-actions { display: flex; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }

.filter-tabs { display: flex; gap: .5rem; margin-bottom: 1.5rem; flex-wrap: wrap; border-bottom: 2px solid var(--border); padding-bottom: .75rem; }
.tab-btn { border: none; background: none; padding: .5rem 1rem; border-radius: 8px; font-weight: 600; font-size: .88rem; cursor: pointer; color: var(--text-muted); transition: all .2s; }
.tab-btn:hover, .tab-btn.active { background: #f0f4ff; color: var(--primary); }

.result-item { padding: 1.25rem; border: 1px solid var(--border); border-radius: 10px; margin-bottom: .75rem; }
.result-item.correct { border-color: #a8e6c5; background: #f0faf5; }
.result-item.wrong { border-color: #f5b7b1; background: #fdf5f4; }
.result-item.blank { border-color: var(--border); background: #fafafa; }
.result-header { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; flex-wrap: wrap; }
.result-num { font-weight: 600; font-size: .85rem; color: var(--text-muted); }
.result-status { margin-left: auto; font-weight: 600; font-size: .85rem; }
.result-question { margin-bottom: 1rem; font-size: .95rem; }
.result-options { display: grid; gap: .4rem; }
.result-opt { display: flex; align-items: flex-start; gap: .75rem; padding: .5rem .75rem; border-radius: 8px; font-size: .88rem; }
.result-opt.correct-opt { background: #d4f5e6; }
.result-opt.wrong-opt { background: #fde8e8; }
.opt-l { font-weight: 700; min-width: 20px; }
.opt-badge { margin-left: auto; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.correct-badge { color: #1a7a46; }
.wrong-badge { color: #c0392b; }

/* ── STUDY MODE ── */
.study-controls { }
.study-filters { display: flex; gap: 1rem; align-items: flex-end; flex-wrap: wrap; }
.filter-group { flex: 1; min-width: 180px; }
.filter-group label { display: block; font-weight: 600; font-size: .85rem; margin-bottom: .4rem; }
.study-info { margin-top: .75rem; color: var(--text-muted); font-size: .88rem; }
.study-card { margin-bottom: 1rem; }
.study-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .75rem; flex-wrap: wrap; gap: .5rem; }
.study-card-meta { display: flex; gap: .5rem; align-items: center; }
.q-num { font-size: .85rem; color: var(--text-muted); }
.study-stats-mini { display: flex; gap: .75rem; font-size: .82rem; color: var(--text-muted); }
.study-stats-mini .text-danger { color: #c0392b; }
.fail-rate { font-weight: 600; }
.fail-rate.high { color: #c0392b; }
.unseen-tag { background: #f0f4ff; color: var(--primary); border-radius: 6px; padding: .15rem .5rem; font-size: .78rem; font-weight: 600; }
.study-question { font-size: .95rem; margin-bottom: 1rem; line-height: 1.6; }
.study-options { display: grid; gap: .4rem; }
.study-opt { display: flex; align-items: flex-start; gap: .75rem; padding: .55rem .75rem; border-radius: 8px; font-size: .88rem; background: #f9faff; border: 1px solid var(--border); }
.study-opt.correct-opt { background: #d4f5e6; border-color: #a8e6c5; }
.correct-mark { margin-left: auto; color: #1a7a46; font-weight: 700; }
.pagination { display: flex; gap: 1rem; align-items: center; justify-content: center; margin: 1.5rem 0; }
.page-info { color: var(--text-muted); font-size: .9rem; }

/* ── HISTORY ── */
.history-summary { display: flex; gap: 2rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.hs-item { text-align: center; }
.hs-val { display: block; font-size: 2rem; font-weight: 800; color: var(--primary); }
.hs-lbl { font-size: .85rem; color: var(--text-muted); }
.history-table { font-size: .88rem; }
.mode-badge { font-size: .75rem; }
.detail-summary { display: flex; gap: 1.5rem; margin-bottom: 1.5rem; font-weight: 600; }
.detail-list { display: grid; gap: .75rem; }
.detail-item { display: flex; gap: 1rem; padding: .75rem; border-radius: 8px; border: 1px solid var(--border); }
.detail-item.wrong { background: #fdf5f4; border-color: #f5b7b1; }
.detail-item.blank { background: #fafafa; }
.di-status { font-size: 1.2rem; flex-shrink: 0; }
.di-question { font-size: .88rem; margin-bottom: .5rem; }
.di-answers { display: flex; flex-wrap: wrap; gap: .5rem; font-size: .85rem; }
.di-wrong-ans { color: #c0392b; font-weight: 600; }
.di-correct-ans { color: #1a7a46; font-weight: 600; }

/* ── ADMIN ── */
.alert-card { border-left: 4px solid var(--warning); }
.code-block { background: #1a2332; border-radius: 8px; padding: 1rem 1.25rem; margin: .75rem 0; }
.code-block pre { color: #a8d8ea; font-size: .88rem; white-space: pre-wrap; }
.code-note { font-size: .82rem; color: var(--text-muted); }
.mini-progress { display: inline-block; width: 80px; height: 8px; background: var(--border); border-radius: 4px; vertical-align: middle; margin-right: .5rem; overflow: hidden; }
.mini-bar { height: 100%; background: var(--success); border-radius: 4px; }
.pending-q { border: 1px solid var(--border); border-radius: 10px; padding: 1rem; margin-bottom: 1rem; }
.pq-header { display: flex; gap: .5rem; margin-bottom: .75rem; }
.pq-num { font-weight: 700; color: var(--text-muted); font-size: .85rem; }
.pq-text { font-size: .9rem; margin-bottom: .75rem; }
.pq-options { display: grid; gap: .4rem; }
.pq-opt { border: 1.5px solid var(--border); border-radius: 8px; padding: .55rem .9rem; cursor: pointer; text-align: left; font-size: .85rem; transition: all .2s; background: var(--card); }
.pq-opt:hover { border-color: var(--primary); background: #f0f4ff; }
.saved-msg { color: var(--success); font-weight: 600; font-size: .85rem; margin-top: .5rem; }
.import-textarea { width: 100%; height: 180px; border: 2px solid var(--border); border-radius: 8px; padding: .75rem 1rem; font-family: monospace; font-size: .85rem; resize: vertical; outline: none; }
.import-textarea:focus { border-color: var(--primary); }
.success-msg { background: #d4f5e6; color: #1a7a46; padding: .75rem 1rem; border-radius: 8px; font-weight: 600; }

/* ── MISC ── */
.loading-msg { color: var(--text-muted); text-align: center; padding: 2rem; }

@media (max-width: 768px) {
    .exam-wrapper { grid-template-columns: 1fr; }
    .question-map-wrapper { border-left: none; border-top: 1px solid var(--border); }
    .results-hero { flex-direction: column; align-items: flex-start; }
    .mode-grid { grid-template-columns: 1fr 1fr; }
    .navbar { padding: 0 1rem; }
    .nav-links { gap: 0; }
    .nav-link { padding: .4rem .5rem; font-size: .8rem; }
}