:root {
    /* Baseline M3 Pale Green / Sage Theme */
    --primary: #296a57;
    --on-primary: #ffffff;
    --primary-container: #b0f1d8;
    --on-primary-container: #002015;
    
    --secondary: #4b635a;
    --secondary-container: #cde8de;
    --on-secondary-container: #072018;
    
    --error: #ba1a1a;
    --error-container: #ffdad6;
    --on-error-container: #410002;

    --surface: #fbfdf9;
    --on-surface: #191c1b;
    --surface-variant: #dbe5df;
    --on-surface-variant: #3f4945;
    
    --outline: #6f7975;
    --outline-variant: #bfc9c4;

    /* Elevations M3 */
    --elevation-1: 0 1px 2px 0 rgba(0,0,0,0.15), 0 1px 3px 1px rgba(0,0,0,0.1);
    --elevation-2: 0 1px 2px 0 rgba(0,0,0,0.15), 0 2px 6px 2px rgba(0,0,0,0.1);
    
    /* Shape Radii */
    --radius-small: 12px;
    --radius-medium: 16px;
    --radius-large: 24px;
    --radius-full: 9999px;
    
    --nav-height: 80px;
}

[data-theme="dark"] {
    --primary: #80d4bd;
    --on-primary: #00382d;
    --primary-container: #005041;
    --on-primary-container: #9cf1d9;
    
    --secondary: #b2ccbf;
    --secondary-container: #334b41;
    --on-secondary-container: #cde8de;
    
    --error: #ffb4ab;
    --error-container: #93000a;
    --on-error-container: #ffdad6;

    --surface: #191c1b;
    --on-surface: #e1e3e0;
    --surface-variant: #3f4945;
    --on-surface-variant: #bfc9c4;
    
    --outline: #89938e;
    --outline-variant: #3f4945;
}

body {
    font-family: 'Roboto', 'Inter', sans-serif;
    background-color: var(--surface);
    color: var(--on-surface);
    line-height: 1.5;
    padding-bottom: calc(var(--nav-height) + 20px);
    font-weight: 400;
    transition: background-color 0.4s ease, color 0.4s ease;
}

body * { transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.2s ease; }

h1, h2, h3 { color: var(--on-surface); font-weight: 500; letter-spacing: -0.2px; }
.subtitle { color: var(--on-surface-variant); font-size: 0.95rem; margin-bottom: 20px; font-weight: 400; }

/* Top App Bar */
.app-header {
    background: var(--surface);
    color: var(--on-surface);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}
.header-content > div { text-align: left; }
.app-header h1 { color: var(--primary); font-size: 1.25rem; margin: 0 0 2px 0; font-weight: 700; }
.app-header p { font-size: 0.75rem; color: var(--on-surface-variant); margin: 0; font-weight: 500; }
.header-logo { width: 32px; height: 32px; object-fit: contain; margin-right: 12px; }

.theme-btn {
    background: transparent; border: none; font-size: 1.5rem; 
    color: var(--on-surface-variant); cursor: pointer; padding: 12px;
    border-radius: var(--radius-full);
}
.theme-btn i { transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); }
.theme-btn:active i { transform: rotate(180deg) scale(0.6); }
.theme-btn:active { background: var(--surface-variant); }

#app-content { padding: 16px; max-width: 600px; margin: 0 auto; }

/* M3 Bottom Navigation Bar */
.bottom-nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--surface);
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: var(--nav-height);
    box-shadow: 0 -1px 2px rgba(0,0,0,0.05);
    z-index: 100;
}
.nav-item {
    background: none; border: none;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--on-surface-variant);
    font-size: 0.65rem;
    font-family: 'Roboto';
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
    flex: 1;
    min-width: 0;
    padding: 0 4px;
}

.nav-icon-container {
    width: 48px;
    height: 28px;
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 4px;
    transition: background-color 0.2s;
}
.nav-item i { font-size: 1.5rem; transition: transform 0.2s; }

.nav-item.active { color: var(--on-surface); }
.nav-item.active .nav-icon-container { 
    background-color: var(--secondary-container); 
    animation: bounceBubble 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.nav-item.active i { color: var(--on-secondary-container); }

@keyframes bounceBubble {
    0% { transform: scale(0.5); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Material Cards */
.summary-card {
    background: var(--surface);
    border-radius: var(--radius-medium);
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--outline-variant);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1), transform 0.1s;
}
.summary-card:hover { border-color: var(--outline); box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
.summary-card:active { background: var(--surface-variant); transform: scale(0.98); }
.summary-header { display: flex; justify-content: space-between; align-items: center; }
.summary-header h3 { font-size: 1.15rem; font-weight: 500;}
.badge {
    font-size: 0.75rem; padding: 4px 8px; border-radius: 8px;
    font-weight: 500; letter-spacing: 0.3px;
}
.badge.alta { background: var(--error-container); color: var(--on-error-container); }
.badge.baixa { background: var(--secondary-container); color: var(--on-secondary-container); }
.summary-content {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--outline-variant);
    display: none;
    font-size: 0.95rem;
    color: var(--on-surface-variant);
    animation: fadeIn 0.3s ease;
}
.summary-card.expanded .summary-content { display: block; }
.summary-card.expanded .toggle-icon { transform: rotate(180deg); }
.toggle-icon { transition: transform 0.3s; color: var(--on-surface-variant); }

.summary-content h3 { font-size: 1rem; color: var(--primary); margin: 10px 0 5px 0; }
.summary-content ul { margin-left: 20px; margin-bottom: 10px; }
.summary-content p { margin-bottom: 10px; }

/* Subject Chips (M3 Design) */
.chip-container {
    display: flex; gap: 12px; overflow-x: auto;
    padding: 4px 4px 16px 4px; margin-bottom: 8px;
    scrollbar-width: none;
}
.chip-container::-webkit-scrollbar { display: none; }
.chip {
    padding: 8px 16px; border-radius: var(--radius-full);
    background: var(--surface); color: var(--on-surface-variant);
    font-family: 'Roboto'; font-size: 0.85rem; font-weight: 600;
    border: 1px solid var(--outline-variant); cursor: pointer;
    white-space: nowrap; transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
    display: flex; align-items: center; gap: 6px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.chip:hover { background: var(--surface-variant); transform: translateY(-1px); box-shadow: 0 2px 4px rgba(0,0,0,0.1); border-color: var(--outline); }
.chip:active { transform: translateY(0) scale(0.97); box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.chip.active {
    background: var(--primary);
    color: var(--on-primary);
    border-color: transparent;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

/* Questões / Simulados M3 */
.quiz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.progress-container {
    background: var(--surface-variant);
    border-radius: var(--radius-full);
    height: 8px;
    width: 100%;
    margin-bottom: 24px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.quiz-card { background: var(--surface); border-radius: 0; padding: 0; }
.quiz-question { font-size: 1.25rem; font-weight: 400; margin-bottom: 24px; color: var(--on-surface); line-height: 1.4;}
.quiz-options { display: flex; flex-direction: column; gap: 12px; }

.option-btn {
    font-family: 'Roboto';
    background: var(--surface); border: 1px solid var(--outline);
    padding: 16px; border-radius: var(--radius-large);
    text-align: left; font-size: 1rem; color: var(--on-surface); font-weight: 500;
    cursor: pointer; transition: all 0.2s cubic-bezier(0.2, 0, 0, 1), transform 0.1s;
}
.option-btn:hover:not(:disabled) { background: var(--surface-variant); border-color: var(--on-surface-variant); transform: translateY(-1px); }
.option-btn:active:not(:disabled) { background: var(--outline-variant); transform: scale(0.98); }

.option-btn.correct { background: var(--primary-container); color: var(--on-primary-container); border-color: transparent; }
.option-btn.wrong { background: var(--error-container); color: var(--on-error-container); border-color: transparent; }
.option-btn:disabled { cursor: default; }

.feedback-card {
    background: var(--surface-variant);
    border-radius: var(--radius-large);
    padding: 24px; margin-top: 24px;
    text-align: center;
    border: none;
    animation: slideUp 0.3s cubic-bezier(0.2, 0, 0, 1);
}
.feedback-card.success { background: var(--primary-container); color: var(--on-primary-container); }
.feedback-card.error { background: var(--error-container); color: var(--on-error-container); }
.feedback-icon { font-size: 3rem; margin-bottom: 12px; }
.feedback-card.success .feedback-icon { color: var(--primary); }
.feedback-card.error .feedback-icon { color: var(--error); }
.feedback-title { margin-bottom: 8px; font-size: 1.25rem; font-weight: 500; }
.feedback-text { font-size: 1rem; color: inherit; margin-bottom: 24px; opacity: 0.9; }

/* M3 Filled Buttons */
.btn {
    font-family: 'Roboto';
    width: 100%; padding: 14px 24px; border: none; border-radius: var(--radius-full);
    font-size: 1rem; font-weight: 500; cursor: pointer; letter-spacing: 0.1px;
    transition: background 0.2s, box-shadow 0.2s;
    display: flex; justify-content: center; align-items: center; gap: 8px;
}
.btn-primary { 
    background: var(--primary); color: var(--on-primary); 
    box-shadow: var(--elevation-1);
}
.btn-primary:active { background: #225a48; box-shadow: none; }

.btn-outline { 
    background: transparent; border: 1px solid var(--outline); color: var(--primary); 
}
.btn-outline:active { background: var(--surface-variant); }

.btn-danger { 
    background: var(--error); color: white; 
}
.mt-20 { margin-top: 20px; }

/* Results */
.result-card { text-align: center; padding: 40px 20px; background: var(--surface); border-radius: var(--radius-large); box-shadow: var(--elevation-1); }
.score-circle {
    width: 120px; height: 120px; border-radius: 50%;
    background: var(--secondary-container);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 24px auto;
}
#score-text { font-size: 2.5rem; font-weight: 400; color: var(--on-secondary-container); }
#score-message { margin-bottom: 30px; color: var(--on-surface-variant); font-size: 1.1rem; }

/* Stats Accordion M3 */
.stats-accordion {
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-medium);
    margin-bottom: 24px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.stats-accordion[open] .arrow { transform: rotate(180deg); }
.stats-summary {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px; cursor: pointer; list-style: none;
    font-weight: 600; font-size: 1rem; color: var(--on-surface);
}
.mini-stats-badge {
    font-size: 0.7rem; background: var(--surface-variant); padding: 4px 10px; border-radius: var(--radius-full);
    display: flex; gap: 8px; align-items: center; color: var(--on-surface); font-weight: 700;
}
.stats-summary::-webkit-details-marker { display: none; }
.stats-summary i.fa-chart-pie { color: var(--primary); margin-right: 8px;}
.accordion-content {
    padding: 0 16px 16px 16px;
    border-top: 1px solid var(--outline-variant);
    margin-top: 8px; padding-top: 16px;
    animation: fadeIn 0.3s ease-out;
}

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat-card {
    background: var(--surface-variant); border-radius: var(--radius-medium);
    padding: 16px; text-align: center; border: none;
}
.stat-card.full-width { grid-column: 1 / -1; }
.stat-card i { font-size: 1.5rem; margin-bottom: 8px; }
.stat-card h3 { font-size: 1.5rem; margin: 0 0 4px 0; color: var(--on-surface); font-weight: 600;}
.stat-card p { font-size: 0.8rem; margin: 0; color: var(--on-surface-variant); font-weight: 500;}

.color-green { color: var(--primary); }
.color-red { color: var(--error); }
.color-blue { color: #006494; }

/* A Lei MD3 */
.search-box {
    display: flex; align-items: center; background: var(--surface-variant);
    border: none; border-radius: var(--radius-full);
    padding: 16px 20px; margin-top: 8px;
}
.search-box i { color: var(--on-surface-variant); margin-right: 12px; font-size: 1.2rem; }
.search-box input {
    border: none; outline: none; flex: 1; font-family: 'Roboto'; background: transparent;
    font-size: 1rem; color: var(--on-surface); font-weight: 400;
}
.search-box input::placeholder { color: var(--on-surface-variant); }
.lei-block {
    background: var(--surface); border-radius: var(--radius-small); padding: 16px; margin-bottom: 16px;
    border: 1px solid var(--outline-variant); 
    font-size: 1rem; color: var(--on-surface); line-height: 1.5;
}
.lei-block.destaque { 
    border-color: transparent; font-weight: 500; 
    color: var(--on-secondary-container); background: var(--secondary-container); 
    border-radius: var(--radius-large);
}

/* Hierarquia visual da Lei Orgânica */
.lei-block.lei-titulo {
    background: var(--primary);
    color: var(--on-primary);
    border-color: transparent;
    border-radius: var(--radius-large);
    padding: 18px 20px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
}
.lei-block.lei-capitulo {
    background: var(--primary-container);
    color: var(--on-primary-container);
    border-color: transparent;
    border-radius: var(--radius-medium);
    padding: 14px 18px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.lei-block.lei-secao {
    background: transparent;
    border-color: transparent;
    border-bottom: 1px solid var(--outline-variant);
    border-radius: 0;
    padding: 10px 4px;
    font-size: 0.9rem;
    color: var(--on-surface-variant);
    margin-bottom: 4px;
}
.lei-label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    opacity: 0.75;
    display: block;
}
.lei-nome {
    font-size: 1.1rem;
    font-weight: 700;
    display: block;
    letter-spacing: 0.2px;
}

.hidden { display: none !important; }
.fade-in { animation: viewTransition 0.4s cubic-bezier(0.2, 0, 0, 1) both; }

@keyframes viewTransition { 
    from { opacity: 0; transform: translateY(12px) scale(0.99); } 
    to { opacity: 1; transform: translateY(0) scale(1); } 
}
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Cards Pop-In Animation staggered */
.summary-card, .ibge-card, .lei-block {
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1) both;
}
.summary-card:nth-child(1), .ibge-card:nth-child(1), .lei-block:nth-child(1) { animation-delay: 0.05s; }
.summary-card:nth-child(2), .ibge-card:nth-child(2), .lei-block:nth-child(2) { animation-delay: 0.10s; }
.summary-card:nth-child(3), .ibge-card:nth-child(3), .lei-block:nth-child(3) { animation-delay: 0.15s; }
.summary-card:nth-child(4), .ibge-card:nth-child(4), .lei-block:nth-child(4) { animation-delay: 0.20s; }
.summary-card:nth-child(n+5), .ibge-card:nth-child(n+5), .lei-block:nth-child(n+5) { animation-delay: 0.25s; }

@keyframes popIn { 
    from { opacity: 0; transform: translateY(15px) scale(0.95); } 
    to { opacity: 1; transform: translateY(0) scale(1); } 
}

/* A Cidade Layout M3 */
.cidade-hero {
    position: relative; border-radius: var(--radius-large); overflow: hidden;
    margin-bottom: 24px; box-shadow: var(--elevation-1);
    background: var(--surface-variant); height: 200px;
}
.cidade-hero img { width: 100%; height: 100%; object-fit: cover; opacity: 0.8;}
.hero-gradient {
    position: absolute; bottom: 0; left: 0; right: 0; height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
    display: flex; flex-direction: column; justify-content: flex-end; padding: 20px;
}
.hero-gradient h2 { color: #fff; margin: 0; font-size: 1.75rem;}
.hero-gradient p { color: rgba(255,255,255,0.85); margin: 5px 0 0 0; font-size: 0.9rem;}

.ibge-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 30px; }
.ibge-card {
    background: var(--surface-variant); border-radius: var(--radius-medium);
    padding: 16px; border: 1px solid var(--outline); text-align: center;
}
.ibge-card i { font-size: 1.5rem; color: var(--primary); margin-bottom: 8px;}
.ibge-card h3 { font-size: 1.25rem; font-weight: bold; margin: 0; color: var(--on-surface);}
.ibge-card p { font-size: 0.8rem; color: var(--on-surface-variant); margin: 4px 0 0 0;}

.timeline {
    position: relative; padding-left: 20px; margin: 20px 0;
    border-left: 2px solid var(--primary-container);
}
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-item::before {
    content: ''; position: absolute; left: -25px; top: 0;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--primary); border: 2px solid var(--background);
}
.timeline-year { font-weight: 700; color: var(--primary); font-size: 0.9rem; margin-bottom: 4px; display:block;}
.timeline-item h4 { margin: 0 0 6px 0; color: var(--on-surface); font-size: 1.05rem;}
.timeline-item p { margin: 0; font-size: 0.95rem; color: var(--on-surface-variant); line-height: 1.4;}

/* Floating Action Button (FAB) M3 */
.fab {
    position: fixed; bottom: 85px; right: 20px;
    background: var(--primary-container); color: var(--on-primary-container);
    width: 48px; height: 48px; border-radius: 14px;
    display: flex; justify-content: center; align-items: center;
    border: none; box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    cursor: pointer; font-size: 1.25rem; z-index: 900;
    transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1), opacity 0.3s ease;
}
.fab:hover { box-shadow: 0 6px 12px rgba(0,0,0,0.2); transform: translateY(-2px); }
.fab:active { transform: scale(0.92); }
.fab.hidden { opacity: 0; pointer-events: none; transform: translateY(20px); }

/* Item de Indice Lei */
.index-item {
    display: block; padding: 10px 0; color: var(--on-surface-variant); font-size: 0.9rem;
    text-decoration: none; border-bottom: 1px solid var(--outline-variant);
    transition: background 0.2s, padding-left 0.2s;
}
.index-item:hover { color: var(--primary); background: var(--surface); padding-left: 8px; border-radius: 4px;}
.index-item.titulo { color: var(--primary); font-weight: 700; font-size: 0.95rem; margin-top: 6px; }