/* ====================================
   Logic Subject Styles
   Reuses grammar-lesson.css patterns,
   overrides accent colors to teal/cyan.
   ==================================== */

/* ---- Accent overrides ---- */
.lesson-section h2 {
    border-bottom-color: #0d9488;
}

.info-box {
    background: linear-gradient(135deg, rgba(13,148,136,0.1) 0%, rgba(6,182,212,0.1) 100%);
    border-left-color: #0d9488;
}

.example-box h3 {
    color: #0d9488;
}

.sentence-example {
    border-left-color: #0d9488;
}

.tip-box {
    background: linear-gradient(135deg, rgba(245,158,11,0.1) 0%, rgba(251,191,36,0.1) 100%);
    border-left-color: #d97706;
}

.tip-box h4 {
    color: #b45309;
}

.practice-item:hover {
    border-color: #0d9488;
}

/* ---- Truth-table ---- */
.truth-table-wrap {
    overflow-x: auto;
    margin: 18px 0;
}

table.truth-table {
    border-collapse: collapse;
    font-size: 1rem;
    min-width: 320px;
    width: 100%;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

table.truth-table th {
    background: #0d9488;
    color: #fff;
    padding: 10px 16px;
    text-align: center;
    font-size: 1em;
    letter-spacing: 0.03em;
}

table.truth-table td {
    padding: 9px 16px;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.98em;
    color: #374151;
}

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

table.truth-table tr:nth-child(even) td {
    background: #f0fdfa;
}

table.truth-table td.result-T {
    color: #059669;
    font-weight: 700;
}

table.truth-table td.result-F {
    color: #dc2626;
    font-weight: 700;
}

/* ---- Operator symbol badge ---- */
.op-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1em;
    margin: 0 3px;
}

.op-and  { background: #d1fae5; color: #065f46; }
.op-or   { background: #dbeafe; color: #1e40af; }
.op-not  { background: #fee2e2; color: #991b1b; }
.op-if   { background: #fef3c7; color: #78350f; }
.op-iff  { background: #ede9fe; color: #5b21b6; }

/* ---- Argument box (syllogism) ---- */
.argument-box {
    background: #f0fdfa;
    border: 2px solid #99f6e4;
    border-radius: 10px;
    padding: 18px 22px;
    margin: 16px 0;
    font-size: 1em;
    line-height: 1.9;
}

.argument-box .premise {
    color: #134e4a;
}

.argument-box .conclusion {
    border-top: 2px solid #0d9488;
    margin-top: 8px;
    padding-top: 8px;
    font-weight: 700;
    color: #0f766e;
}

.argument-box .label {
    font-size: 0.72em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    display: block;
}

/* ---- Fallacy card ---- */
.fallacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin: 20px 0;
}

.fallacy-card {
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 18px 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.fallacy-card:hover {
    border-color: #0d9488;
    box-shadow: 0 4px 12px rgba(13,148,136,0.15);
}

.fallacy-card h4 {
    color: #0d9488;
    font-size: 1.05em;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.fallacy-card .fallacy-def {
    font-size: 0.88em;
    color: #6b7280;
    margin-bottom: 10px;
    line-height: 1.5;
}

.fallacy-card .fallacy-example {
    background: #fef9c3;
    border-left: 3px solid #facc15;
    border-radius: 0 6px 6px 0;
    padding: 7px 10px;
    font-size: 0.85em;
    color: #374151;
    font-style: italic;
    line-height: 1.5;
}

/* ---- Valid / Invalid tags ---- */
.tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.78em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: 8px;
    vertical-align: middle;
}

.tag-valid   { background: #d1fae5; color: #065f46; }
.tag-invalid { background: #fee2e2; color: #991b1b; }
.tag-strong  { background: #dbeafe; color: #1e40af; }
.tag-weak    { background: #fef3c7; color: #78350f; }

/* ---- Takeaway box override ---- */
.takeaway-box {
    background: linear-gradient(135deg, rgba(13,148,136,0.08) 0%, rgba(6,182,212,0.08) 100%);
    border-left: 5px solid #0d9488;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.takeaway-box ul {
    padding-left: 22px;
}

.takeaway-box li {
    margin: 9px 0;
    color: #374151;
    font-size: 1.02rem;
    line-height: 1.6;
}

/* ---- Nav between lessons ---- */
.lesson-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    gap: 12px;
    flex-wrap: wrap;
}

.lesson-nav a {
    display: inline-block;
    padding: 10px 22px;
    background: #f0fdfa;
    border: 2px solid #0d9488;
    border-radius: 10px;
    text-decoration: none;
    color: #0d9488;
    font-weight: 700;
    transition: all 0.2s ease;
    font-size: 0.95em;
}

.lesson-nav a:hover {
    background: #0d9488;
    color: #fff;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
    .fallacy-grid {
        grid-template-columns: 1fr;
    }
}