:root {
    /* MHAT Brand Colors */
    --primary: #58595B;       /* MHAT Dark Grey - used for main buttons/text */
    --primary-hover: #414244;
    --accent: #8DC63F;        /* MHAT Green - used for highlights, progress, success */
    --accent-hover: #7eb533;
    
    --bg-color: #F5F7F4;      /* Soft greenish-grey background */
    --card-bg: rgba(255, 255, 255, 0.92);
    --text-main: #2d2e30;
    --text-muted: #6b6d70;
    --border: #dbe0d7;
    --danger: #ef4444;
    --warning: #f59e0b;
    --whatsapp: #25D366;      /* Official WhatsApp Green */
    --whatsapp-hover: #128C7E;
    --shadow: 0 10px 30px rgba(88, 89, 91, 0.08);
}

[data-theme="dark"] {
    --primary: #8DC63F;       /* MHAT Green becomes primary in dark mode for pop */
    --primary-hover: #9bd44e;
    --accent: #A5A7AA;        /* Lighter grey for accents */
    --bg-color: #1a1c19;
    --card-bg: rgba(30, 33, 29, 0.9);
    --text-main: #f1f5f9;
    --text-muted: #a1a3a6;
    --border: #383a36;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', sans-serif; }
body { background: var(--bg-color); color: var(--text-main); min-height: 100vh; display: flex; justify-content: center; align-items: center; transition: all 0.3s ease; padding: 20px; }
#theme-toggle { position: absolute; top: 15px; right: 15px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; font-size: 1.1rem; display: flex; justify-content: center; align-items: center; box-shadow: var(--shadow); color: var(--text-main); z-index: 10;}

.glass-card { background: var(--card-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border); border-radius: 16px; padding: 40px; width: 100%; max-width: 1000px; box-shadow: var(--shadow); position: relative; overflow: hidden; min-height: 600px; display: flex; flex-direction: column; }

/* Global Brand & Credit Styles */
.global-header { text-align: center; margin-bottom: 25px; padding-bottom: 15px; border-bottom: 1px solid var(--border); }
.brand-logo { max-height: 65px; object-fit: contain; margin-bottom: 5px; max-width: 100%; }
.global-footer { margin-top: auto; padding-top: 20px; text-align: center; }
.creator-credit { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; letter-spacing: 0.5px; opacity: 0.7; }

.screen { display: none; animation: fadeIn 0.4s ease; flex-grow: 1; }
.screen.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Typography */
h1 { font-size: 2.2rem; margin-bottom: 0.5rem; color: var(--primary); text-align: center; }
h2 { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 2rem; text-align: center; font-weight: 500; }
h3 { font-size: 1.4rem; margin-bottom: 1.5rem; line-height: 1.5; }

/* Forms & Buttons */
.input-group { margin-bottom: 1.5rem; display: flex; flex-direction: column; }
.input-group label { margin-bottom: 0.5rem; font-weight: 500; }
.input-group input { padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: transparent; color: var(--text-main); font-size: 1rem; outline: none; transition: 0.2s; }
.input-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(141, 198, 63, 0.2); }
.action-buttons { display: flex; gap: 15px; justify-content: center; margin-top: 2rem; flex-wrap: wrap; }
.btn { padding: 12px 24px; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: 0.2s; display: inline-flex; justify-content: center; align-items: center; text-align: center; }
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--primary); color: white; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--text-main); }
.btn.secondary:hover { background: var(--border); }
.btn.warning { background: var(--warning); color: white; }
.btn.danger { background: var(--danger); color: white; }
.btn.success { background: var(--accent); color: white; }
.btn.success:hover { background: var(--accent-hover); }
.btn.whatsapp { background: var(--whatsapp); color: white; }
.btn.whatsapp:hover { background: var(--whatsapp-hover); }

/* Quiz Layout */
.quiz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); flex-wrap: wrap; gap: 15px; }
.timer { font-size: 1.5rem; font-weight: 700; color: var(--danger); }
.progress-container { flex-grow: 1; margin: 0 20px; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; min-width: 150px; }
.progress-bar { height: 100%; background: var(--accent); width: 0%; transition: width 0.3s ease; }
.q-counter { font-weight: 500; }
.quiz-body { display: grid; grid-template-columns: 2.5fr 1fr; gap: 30px; }
.options-grid { display: flex; flex-direction: column; gap: 12px; }
.option-btn { text-align: left; padding: 16px; border: 2px solid var(--border); border-radius: 8px; background: transparent; color: var(--text-main); font-size: 1.1rem; cursor: pointer; transition: 0.2s; }
.option-btn:hover { border-color: var(--accent); }
.option-btn.selected { border-color: var(--accent); background: rgba(141, 198, 63, 0.1); }
.quiz-footer { display: flex; gap: 10px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.quiz-footer #btn-submit { margin-left: auto; }

/* Palette */
.palette-area { background: rgba(0,0,0,0.02); padding: 15px; border-radius: 8px; border: 1px solid var(--border); }
.palette-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(35px, 1fr)); gap: 8px; margin-top: 15px; max-height: 300px; overflow-y: auto; }
.palette-btn { padding: 8px 4px; border: 1px solid var(--border); background: var(--card-bg); color: var(--text-main); border-radius: 4px; cursor: pointer; font-weight: 600; text-align: center; }
.palette-btn.answered { background: var(--accent); color: white; border-color: var(--accent); }
.palette-btn.flagged { background: var(--warning); color: white; border-color: var(--warning); }
.palette-btn.active { box-shadow: 0 0 0 2px var(--text-main); }
.palette-legend { margin-top: 15px; display: flex; flex-direction: column; gap: 5px; font-size: 0.85rem; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; }
.dot.answered { background: var(--accent); }
.dot.flagged { background: var(--warning); }
.dot.unattempted { border: 1px solid var(--border); }

/* Results & Review */
.result-dashboard { display: flex; justify-content: space-around; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; gap: 20px; }
.stats-panel { display: flex; flex-direction: column; gap: 15px; flex: 1; min-width: 250px; }
.stat-box { background: rgba(141, 198, 63, 0.05); padding: 15px; border-radius: 8px; border: 1px solid var(--border); text-align: center; }
.stat-box p { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.message { text-align: center; color: var(--primary); margin-bottom: 2rem; }
#review-container { max-height: 50vh; overflow-y: auto; padding-right: 10px; }
.review-item { margin-bottom: 20px; padding: 15px; border: 1px solid var(--border); border-radius: 8px; }
.review-item.correct-bg { border-left: 5px solid var(--accent); }
.review-item.incorrect-bg { border-left: 5px solid var(--danger); }
.explanation { margin-top: 10px; padding: 10px; background: rgba(0,0,0,0.05); border-radius: 4px; font-size: 0.95rem; }

/* Modal */
.modal { position: absolute; inset: 0; background: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; z-index: 100; backdrop-filter: blur(5px); padding: 20px; }
.hidden { display: none !important; }
.modal-content { background: var(--card-bg); padding: 30px; border-radius: 12px; width: 100%; max-width: 400px; text-align: center; max-height: 90vh; overflow-y: auto; }
.modal-content ul { text-align: left; margin: 15px 0; padding-left: 20px; }

/* Certificate */
.cert-container { display: flex; justify-content: center; overflow: auto; max-width: 100%; }
canvas { max-width: 100%; height: auto; }

/* ========================================= */
/* CASE VIGNETTE QUESTION STYLES             */
/* ========================================= */
.vignette-box { background: rgba(141, 198, 63, 0.08); border-left: 4px solid var(--accent); padding: 20px; border-radius: 0 8px 8px 0; margin-bottom: 25px; font-size: 1.05rem; line-height: 1.6; color: var(--text-main); }
.case-part { margin-bottom: 20px; background: var(--card-bg); padding: 15px; border: 1px solid var(--border); border-radius: 8px; }
.case-part h4 { margin-bottom: 10px; color: var(--primary); font-size: 1rem; }
.case-select { width: 100%; padding: 12px; border: 2px solid var(--border); border-radius: 6px; background-color: var(--bg-color); color: var(--text-main); font-size: 1rem; cursor: pointer; outline: none; transition: 0.2s; }
.case-select:focus { border-color: var(--accent); }
.case-review-part { margin-top: 10px; padding: 10px; background: rgba(0,0,0,0.03); border-radius: 6px; }
.case-review-part p { margin-bottom: 5px; font-size: 0.95rem; }

/* ========================================= */
/* MOBILE RESPONSIVENESS (Media Queries)     */
/* ========================================= */
@media (max-width: 900px) { .quiz-body { grid-template-columns: 1fr; } }
@media (max-width: 600px) {
    body { padding: 10px; }
    .glass-card { padding: 20px; min-height: auto; border-radius: 12px; }
    h1 { font-size: 1.6rem; } h2 { font-size: 1rem; } h3 { font-size: 1.2rem; }
    .action-buttons { flex-direction: column; width: 100%; }
    .action-buttons .btn { width: 100%; }
    .quiz-header { flex-direction: column; align-items: flex-start; gap: 10px; }
    .progress-container { margin: 0; width: 100%; }
    .quiz-footer { justify-content: space-between; }
    .quiz-footer .btn { flex: 1 1 45%; margin: 0; padding: 10px; font-size: 0.9rem; }
    .quiz-footer #btn-submit { flex: 1 1 100%; margin-top: 10px; margin-left: 0; }
    .option-btn { padding: 12px; font-size: 1rem; }
    .stat-box p { font-size: 1.2rem; }
    #review-container { max-height: 60vh; }
}
@media (max-width: 400px) {
    .palette-grid { grid-template-columns: repeat(auto-fill, minmax(30px, 1fr)); }
    .glass-card { padding: 15px; }
}