/* ═══════════════════════════════════════════════════════════════════
   SIMPLE PRESENT TENSE: DO/DOES - SPECIFIC OVERRIDES
   Category: Tenses - Color Scheme: #4caf50 (Green)
   Extends shared.css with Tenses-specific styling
   ═══════════════════════════════════════════════════════════════════ */

/* ─── TENSES CATEGORY COLOR OVERRIDES ─── */
:root {
    --tenses-primary: #4caf50;           /* Green primary */
    --tenses-primary-dark: #388e3c;      /* Dark green */
    --tenses-secondary: #66bb6a;         /* Light green */
    --card-accent: #ff9800;              /* Orange - Interactive card accent */
    --card-accent-dark: #f57c00;         /* Dark orange for hover states */
}

/* ─── SECTION TITLE OVERRIDE ─── */
.section-title {
    background: linear-gradient(135deg, var(--tenses-primary), var(--tenses-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--tenses-primary); /* Fallback */
}

/* ─── INFO BLOCK OVERRIDES ─── */
.info-block .info-label {
    color: var(--tenses-primary);
    border-bottom-color: var(--tenses-primary);
}

/* ─── USAGE RULE BOX OVERRIDES ─── */
.usage-rule-box h4 {
    color: var(--tenses-primary-dark);
    border-bottom-color: var(--tenses-primary);
}

/* ─── GRAMMAR ELEMENT HIGHLIGHTING ─── */
.verb {
    background: rgba(76, 175, 80, 0.2);
    color: var(--tenses-primary-dark);
}

.aux {
    background: rgba(255, 152, 0, 0.2);
    color: #ef6c00;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.verb-suffix {
    background: rgba(76, 175, 80, 0.3);
    color: var(--tenses-primary-dark);
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: 700;
}

/* ─── INTERACTIVE VERB GRID ─── */
.verb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.verb-card {
    background: var(--bg-secondary);
    border: 2px solid var(--card-accent);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.verb-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--card-accent), var(--tenses-secondary));
}

.verb-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.2);
    border-color: var(--card-accent-dark);
}

.verb-card.active {
    border-color: var(--card-accent-dark);
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.05), rgba(255, 152, 0, 0.1));
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.2);
}

.base-verb {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--tenses-primary-dark);
    text-align: center;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.verb-forms {
    display: flex;
    flex-direction: column;
    gap: 10px;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.verb-card.active .verb-forms {
    opacity: 1;
    max-height: 200px;
}

.form-positive,
.form-negative,
.form-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-radius: 6px;
    background: var(--bg-primary);
    border-left: 3px solid var(--tenses-primary);
}

.form-positive {
    border-left-color: var(--tenses-primary);
}

.form-negative {
    border-left-color: #f44336;
}

.form-question {
    border-left-color: #ff9800;
}

.form-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-result {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
}

/* ─── CLICK INSTRUCTION ─── */
.verb-card::after {
    content: 'Click to see transformations';
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.verb-card.active::after {
    content: 'Click to hide';
}

.verb-card:hover::after {
    opacity: 1;
}

/* ─── SPECIFIC SIMPLE PRESENT DO/DOES STYLES ─── */
.interactive-example .sentence {
    border-left-color: var(--tenses-primary);
}

/* ─── MISTAKE EXAMPLES ─── */
.mistake-example.correct .mistake-icon {
    color: var(--tenses-primary);
}

/* ─── MOBILE RESPONSIVE ─── */
@media (max-width: 768px) {
    .verb-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .verb-card {
        padding: 15px;
    }
    
    .base-verb {
        font-size: 1.3rem;
        margin-bottom: 12px;
    }
    
    .form-positive,
    .form-negative,
    .form-question {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .form-label {
        font-size: 0.85rem;
    }
    
    .form-result {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .verb-card {
        padding: 12px;
    }
    
    .base-verb {
        font-size: 1.2rem;
    }
    
    .verb-card::after {
        font-size: 0.75rem;
        bottom: 8px;
    }
}