/* =====================================================================
   DOT-Train  |  Master Stylesheet
   Aesthetic: industrial compliance manual.  Sharp corners, hazard
   stripes, monospaced spec callouts, generous whitespace, no
   marshmallow buttons.  Designed to feel earned, not cute.
   ===================================================================== */

/* --- Design tokens.  Change values here, propagate everywhere. --- */
:root {
    /* Cunningham brand: orange + black + slate.  Yellow is reserved
       for "attention required" -- safety vest semantics. */
    --c-orange:        #F26B1F;
    --c-orange-deep:   #C4501A;
    --c-yellow:        #FFD400;
    --c-ink:           #111418;     /* near-black, not pure */
    --c-slate-900:     #1A1F26;
    --c-slate-700:     #2B313A;
    --c-slate-500:     #565E6B;
    --c-slate-300:     #B7BCC4;
    --c-slate-100:     #E8EAEE;
    --c-paper:         #F4F2EE;     /* warm off-white, like inspection paper */
    --c-paper-line:    #DCD8D0;
    --c-pass:          #2E7D32;
    --c-fail:          #C62828;

    /* Type. We pair a characterful display + a clean industrial body. */
    --f-display: 'Oswald', 'Bebas Neue', 'Impact', 'Arial Narrow', sans-serif;
    --f-body:    'IBM Plex Sans', 'Helvetica Neue', 'Segoe UI', system-ui, sans-serif;
    --f-mono:    'IBM Plex Mono', 'JetBrains Mono', ui-monospace, 'Menlo', 'Consolas', monospace;

    --r-sm: 2px;        /* sharp, not soft */
    --r-md: 3px;
    --shadow-hard: 4px 4px 0 0 var(--c-ink);
    --shadow-soft: 0 2px 8px rgba(17,20,24,0.08);
}

/* --- Reset-ish --- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--f-body);
    font-size: 16px;
    line-height: 1.55;
    color: var(--c-ink);
    background: var(--c-paper);
    /* Subtle grid pattern -- like graph paper or an inspection form. */
    background-image:
        linear-gradient(var(--c-paper-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--c-paper-line) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: -1px -1px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Hazard stripe at very top --- */
.hazard-stripe {
    height: 8px;
    background: repeating-linear-gradient(
        135deg,
        var(--c-ink)      0 16px,
        var(--c-yellow) 16px 32px
    );
}

/* --- Top bar --- */
.topbar {
    background: var(--c-ink);
    color: var(--c-paper);
    border-bottom: 3px solid var(--c-orange);
}
.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.brand {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    text-decoration: none;
    color: inherit;
}
.brand-mark {
    font-family: var(--f-display);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--c-paper);
    background: var(--c-orange);
    padding: 2px 8px 0;
    line-height: 1;
}
.brand-mark-alt { background: var(--c-paper); color: var(--c-ink); }
.brand-org {
    font-family: var(--f-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--c-slate-300);
}

.topnav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 18px;
}
.topnav a {
    color: var(--c-paper);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border-color .15s;
}
.topnav a:hover { border-bottom-color: var(--c-orange); }
.topnav-user {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.1;
    text-align: right;
    padding-left: 18px;
    border-left: 1px solid var(--c-slate-700);
}
.topnav-name { font-size: 13px; font-weight: 600; }
.topnav-role {
    font-family: var(--f-mono);
    font-size: 10px;
    text-transform: uppercase;
    color: var(--c-orange);
    letter-spacing: 0.15em;
}

/* --- Page wrapper --- */
.page {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

/* --- Footer --- */
.footer {
    background: var(--c-ink);
    color: var(--c-slate-300);
    border-top: 3px solid var(--c-orange);
    padding: 18px 24px;
    margin-top: auto;
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.05em;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    align-items: center;
}
.footer-spacer { color: var(--c-slate-700); }
.footer-built  { color: var(--c-slate-500); margin-left: auto; }

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--f-display);
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--c-ink);
    margin: 0 0 0.5em;
    line-height: 1.15;
}
h1 { font-size: 38px; text-transform: uppercase; letter-spacing: 0.02em; }
h2 { font-size: 26px; }
h3 { font-size: 19px; text-transform: uppercase; letter-spacing: 0.06em; }
h4 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-slate-700); }

p { margin: 0 0 1em; }

a { color: var(--c-orange-deep); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--c-orange); }

code, .mono { font-family: var(--f-mono); font-size: 0.92em; }

/* --- Spec callout: a numbered tag like "1.1" or "§395.8" --- */
.spec-tag {
    display: inline-block;
    font-family: var(--f-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    background: var(--c-ink);
    color: var(--c-yellow);
    padding: 3px 8px;
    border: 1px solid var(--c-ink);
    vertical-align: middle;
}
.spec-tag-light {
    background: transparent;
    color: var(--c-ink);
    border: 1px solid var(--c-ink);
}

/* --- Panels: bordered boxes that look like inspection forms --- */
.panel {
    background: #fff;
    border: 2px solid var(--c-ink);
    box-shadow: var(--shadow-hard);
    padding: 24px;
    margin-bottom: 24px;
}
.panel-header {
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 2px solid var(--c-ink);
    padding-bottom: 12px;
    margin: -24px -24px 20px;
    padding: 16px 24px;
    background: var(--c-paper);
}
.panel-header h2 { margin: 0; }

/* --- Buttons --- */
.btn {
    display: inline-block;
    font-family: var(--f-display);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 10px 20px;
    border: 2px solid var(--c-ink);
    background: var(--c-orange);
    color: var(--c-ink);
    text-decoration: none;
    cursor: pointer;
    box-shadow: var(--shadow-hard);
    transition: transform .08s ease, box-shadow .08s ease;
}
.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 0 var(--c-ink);
    color: var(--c-ink);
}
.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0 0 0 0 var(--c-ink);
}
.btn-secondary { background: #fff; }
.btn-ghost     { background: transparent; color: var(--c-paper); border-color: var(--c-paper); box-shadow: none; }
.btn-ghost:hover { background: var(--c-paper); color: var(--c-ink); }
.btn-sm        { font-size: 13px; padding: 6px 12px; }
.btn-lg        { font-size: 18px; padding: 14px 28px; }
.btn-danger    { background: var(--c-fail); color: #fff; }

/* --- Forms --- */
.form-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; }
.form-row label {
    font-family: var(--f-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--c-slate-700);
}
.form-row input[type="text"],
.form-row input[type="password"],
.form-row input[type="email"],
.form-row select,
.form-row textarea {
    font: inherit;
    padding: 10px 12px;
    border: 2px solid var(--c-ink);
    background: #fff;
    border-radius: 0;
    width: 100%;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
    outline: 3px solid var(--c-yellow);
    outline-offset: 0;
}
.form-row .form-help {
    font-size: 12px;
    color: var(--c-slate-500);
}

/* Multi-checkbox grid for goal selection */
.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}
.goal-check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 2px solid var(--c-slate-300);
    background: #fff;
    cursor: pointer;
    transition: border-color .12s, background .12s;
}
.goal-check:hover { border-color: var(--c-ink); }
.goal-check input { width: 18px; height: 18px; accent-color: var(--c-orange); }
.goal-check input:checked + span { font-weight: 700; }
.goal-check.is-checked { border-color: var(--c-orange); background: #FFF7F0; }

/* --- Alerts/flash --- */
.alert {
    padding: 12px 16px;
    border: 2px solid var(--c-ink);
    background: var(--c-yellow);
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-error   { background: #FFE8E5; border-color: var(--c-fail); }
.alert-success { background: #E6F4EA; border-color: var(--c-pass); }

/* --- Progress bars --- */
.progress {
    width: 100%;
    height: 14px;
    background: var(--c-slate-100);
    border: 1.5px solid var(--c-ink);
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        var(--c-orange)        0 8px,
        var(--c-orange-deep)   8px 16px
    );
    transition: width .3s;
}
.progress-fill.is-complete { background: var(--c-pass); }

/* --- Dashboard goal cards --- */
.goal-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}
.goal-card {
    background: #fff;
    border: 2px solid var(--c-ink);
    padding: 18px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.goal-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--c-slate-300);
    padding-bottom: 8px;
}
.goal-card-title { font-family: var(--f-display); font-size: 17px; text-transform: uppercase; letter-spacing: 0.04em; }
.goal-card-stats { font-family: var(--f-mono); font-size: 12px; color: var(--c-slate-700); }
.goal-card-cert  {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-pass);
}

/* --- Topic list rows --- */
.unit-block { margin-bottom: 36px; }
.unit-label {
    display: flex;
    align-items: baseline;
    gap: 14px;
    border-bottom: 3px solid var(--c-ink);
    padding-bottom: 6px;
    margin-bottom: 14px;
}
.unit-label-num {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--c-orange-deep);
    letter-spacing: 0.15em;
}
.unit-label-text {
    font-family: var(--f-display);
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.topic-row {
    display: grid;
    grid-template-columns: 60px 1fr auto auto;
    gap: 14px;
    align-items: center;
    padding: 12px 14px;
    background: #fff;
    border: 1.5px solid var(--c-slate-300);
    margin-bottom: -1.5px; /* collapse borders between rows */
    text-decoration: none;
    color: var(--c-ink);
    transition: background .12s, border-color .12s;
}
.topic-row:hover { background: var(--c-paper); border-color: var(--c-ink); }
.topic-row-code { font-family: var(--f-mono); font-size: 13px; color: var(--c-slate-700); }
.topic-row-title { font-weight: 600; font-size: 15px; }
.topic-row-meta { font-family: var(--f-mono); font-size: 11px; color: var(--c-slate-500); letter-spacing: 0.05em; }
.topic-row.is-done {
    background: #F1F8F2;
    border-color: var(--c-pass);
}
.topic-row.is-done .topic-row-title::before {
    content: '✓ ';
    color: var(--c-pass);
    font-weight: 700;
}

/* Goal badges next to topic titles */
.goal-badge {
    display: inline-block;
    font-family: var(--f-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    background: var(--c-ink);
    color: var(--c-yellow);
    padding: 2px 6px;
    margin-left: 6px;
    vertical-align: 1px;
}

/* --- Lesson reading content --- */
.lesson-content {
    max-width: 760px;
    font-size: 17px;
    line-height: 1.7;
}
.lesson-content h2 { margin-top: 1.6em; font-size: 22px; }
.lesson-content h3 { margin-top: 1.4em; }
.lesson-content ul, .lesson-content ol { padding-left: 22px; }
.lesson-content li { margin-bottom: 0.4em; }
.lesson-content blockquote {
    border-left: 4px solid var(--c-orange);
    padding: 6px 16px;
    background: #fff;
    margin: 1.2em 0;
    color: var(--c-slate-700);
    font-style: italic;
}
.lesson-content .reg-cite {
    font-family: var(--f-mono);
    background: var(--c-ink);
    color: var(--c-yellow);
    padding: 1px 6px;
    font-size: 0.88em;
}
.lesson-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
    background: #fff;
    border: 2px solid var(--c-ink);
}
.lesson-content th, .lesson-content td {
    padding: 8px 12px;
    border: 1px solid var(--c-slate-300);
    text-align: left;
}
.lesson-content th { background: var(--c-ink); color: var(--c-paper); font-family: var(--f-display); letter-spacing: 0.05em; }

/* --- Quiz/exam UI --- */
.quiz-progress {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--c-slate-700);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}
.quiz-question {
    background: #fff;
    border: 2px solid var(--c-ink);
    padding: 24px;
    margin-bottom: 18px;
    box-shadow: var(--shadow-hard);
}
.quiz-question-prompt {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.4;
}
.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border: 2px solid var(--c-slate-300);
    cursor: pointer;
    background: #fff;
    transition: border-color .12s, background .12s;
}
.quiz-option:hover { border-color: var(--c-ink); }
.quiz-option input { margin-top: 3px; accent-color: var(--c-orange); }
.quiz-option.is-selected { border-color: var(--c-orange); background: #FFF7F0; }
.quiz-option.is-correct  { border-color: var(--c-pass); background: #E6F4EA; }
.quiz-option.is-wrong    { border-color: var(--c-fail); background: #FFE8E5; }
.quiz-explain {
    margin-top: 12px;
    padding: 10px 14px;
    background: var(--c-paper);
    border-left: 4px solid var(--c-orange);
    font-size: 14px;
}

/* --- Tables (admin lists) --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border: 2px solid var(--c-ink);
}
.data-table th {
    background: var(--c-ink);
    color: var(--c-paper);
    font-family: var(--f-display);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 13px;
    padding: 10px 12px;
    text-align: left;
}
.data-table td {
    padding: 10px 12px;
    border-top: 1px solid var(--c-slate-300);
    font-size: 14px;
}
.data-table tr:hover td { background: var(--c-paper); }

/* --- Exam results review --- */
.result-summary-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 12px;
    margin: 16px 0 20px;
}
.result-summary-stat {
    text-align: center;
    padding: 12px 8px;
    background: var(--c-paper);
    border: 1.5px solid var(--c-slate-300);
}
.result-summary-stat-num {
    font-family: var(--f-display);
    font-size: 30px;
    line-height: 1;
    display: block;
}
.result-stat-time { font-size: 22px; }
.result-summary-stat-label {
    font-family: var(--f-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--c-slate-500);
    display: block;
    margin-top: 4px;
}
.result-q {
    background: #fff;
    border: 2px solid var(--c-slate-300);
    border-left: 6px solid var(--c-slate-300);
    margin-bottom: 8px;
    padding: 16px 18px;
}
.result-q.is-correct { border-left-color: var(--c-pass); }
.result-q.is-wrong   { border-left-color: var(--c-fail); border-color: var(--c-fail); box-shadow: var(--shadow-hard); }
details.result-q > summary { list-style: none; cursor: pointer; }
details.result-q > summary::-webkit-details-marker { display: none; }
details.result-q > summary::marker { display: none; }
.result-q-header {
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
}
details.result-q[open] > summary > .result-q-header { margin-bottom: 12px; }
.result-q-body { margin-top: 12px; }
.result-q-status {
    font-family: var(--f-mono);
    font-size: 15px;
    font-weight: 700;
    flex-shrink: 0;
}
.result-q-status.correct { color: var(--c-pass); }
.result-q-status.wrong   { color: var(--c-fail); }
.result-opt {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 7px 10px;
    margin-bottom: 3px;
    border: 1.5px solid var(--c-slate-100);
    font-size: 14px;
    background: #fff;
}
.result-opt.is-correct-ans { border-color: var(--c-pass); background: #E6F4EA; font-weight: 600; }
.result-opt.was-wrong-pick { border-color: var(--c-fail); background: #FFE8E5; text-decoration: line-through; color: var(--c-slate-500); }
.result-opt-icon {
    font-family: var(--f-mono);
    font-size: 13px;
    flex-shrink: 0;
    width: 14px;
    color: var(--c-slate-200);
}
.result-opt.is-correct-ans .result-opt-icon { color: var(--c-pass); }
.result-opt.was-wrong-pick .result-opt-icon { color: var(--c-fail); }
.result-explain {
    margin-top: 10px;
    padding: 10px 14px;
    background: var(--c-paper);
    border-left: 4px solid var(--c-orange);
    font-size: 14px;
    line-height: 1.55;
    color: var(--c-slate-700);
}

/* --- Print-friendly certificate page --- */
@media print {
    .topbar, .footer, .hazard-stripe, .no-print { display: none !important; }
    body { background: #fff; }
}

/* --- Tiny screens --- */
@media (max-width: 720px) {
    .topbar-inner { flex-wrap: wrap; gap: 12px; }
    .topnav { width: 100%; gap: 12px; }
    .topnav-user { padding-left: 0; border-left: none; margin-left: auto; }
    h1 { font-size: 28px; }
    .topic-row { grid-template-columns: 50px 1fr auto; }
    .topic-row-meta { display: none; }
    .panel { padding: 16px; }
    .panel-header { margin: -16px -16px 16px; padding: 12px 16px; }
}