* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0f172a;
    --secondary: #1e293b;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border: #334155;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1a1f3a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%);
    border-bottom: 2px solid var(--accent-blue);
    padding: 2rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Navigation */
.nav-tabs {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.nav-tab {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-tab:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.nav-tab.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* Container Principal */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cards */
.card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-icon {
    font-size: 2rem;
}

.card-content {
    color: var(--text-secondary);
}

/* Grid de Comparação */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.comparison-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.8) 100%);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.comparison-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.15);
}

.comparison-card-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent-blue);
    font-weight: bold;
}

.comparison-item {
    margin: 0.75rem 0;
    padding: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 6px;
    border-left: 3px solid var(--accent-blue);
}

.comparison-label {
    font-weight: bold;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.comparison-value {
    color: var(--text-primary);
}

/* Fases */
.phases-container {
    margin: 2rem 0;
}

.phase {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: center;
}

.phase:nth-child(even) {
    flex-direction: row-reverse;
}

.phase-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent-blue);
    min-width: 80px;
    text-align: center;
}

.phase-content {
    flex: 1;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-blue);
}

.phase-title {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: var(--accent-blue);
}

.phase-description {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.phase-activities {
    background: rgba(15, 23, 42, 0.5);
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
}

.activity {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.activity:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent-green);
}

/* Quiz Interativo */
.quiz-container {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.quiz-question {
    margin-bottom: 2rem;
}

.quiz-question-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: bold;
    color: var(--text-primary);
}

.quiz-options {
    display: grid;
    gap: 0.75rem;
}

.quiz-option {
    background: rgba(15, 23, 42, 0.5);
    border: 2px solid var(--border);
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.quiz-option:hover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

.quiz-option.selected {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.2);
}

.quiz-option.correct {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.2);
}

.quiz-option.incorrect {
    border-color: var(--accent-red);
    background: rgba(239, 68, 68, 0.2);
}

.result-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    font-weight: bold;
}

.result-message.correct {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.result-message.incorrect {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
}

/* Botões */
.btn {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
    margin-right: 0.75rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
}

/* Timeline */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
    padding-left: 2rem;
}

.timeline-item:before {
    content: "";
    position: absolute;
    left: -1rem;
    top: 0;
    width: 1rem;
    height: 1rem;
    background: var(--accent-blue);
    border-radius: 50%;
    border: 3px solid var(--primary);
}

.timeline-item:after {
    content: "";
    position: absolute;
    left: -0.5rem;
    top: 1rem;
    width: 2px;
    height: calc(100% + 1rem);
    background: var(--border);
}

.timeline-item:last-child:after {
    display: none;
}

.timeline-content {
    flex: 1;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
}

.timeline-description {
    color: var(--text-secondary);
}

/* Table */
.feature-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.feature-table th {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border);
    padding: 1rem;
    text-align: left;
    color: var(--accent-blue);
    font-weight: bold;
}

.feature-table td {
    border: 1px solid var(--border);
    padding: 1rem;
    color: var(--text-secondary);
}

.feature-table tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.checkmark {
    color: var(--accent-green);
    font-weight: bold;
}

.partial {
    color: var(--warning);
    font-weight: bold;
}

.container {
    flex: 1;
}

/* Footer */
footer {
    background: rgba(15, 23, 42, 0.8);
    border-top: 2px solid var(--border);
    padding: 2rem;
    margin-top: auto;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsivo */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    .nav-tabs {
        gap: 0.5rem;
    }

    .nav-tab {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .phase {
        flex-direction: column !important;
    }

    .phase-number {
        font-size: 2rem;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .phase-activities {
        font-size: 0.9rem;
    }
}

/* Highlight */
.highlight {
    background: rgba(139, 92, 246, 0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    color: #c4b5fd;
}

/* Info boxes */
.info-box {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--accent-blue);
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
    color: var(--text-secondary);
}

.info-box strong {
    color: var(--accent-blue);
}

.success-box {
    background: rgba(16, 185, 129, 0.1);
    border-left-color: var(--accent-green);
}

.success-box strong {
    color: var(--accent-green);
}

.warning-box {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: var(--accent-red);
}

.warning-box strong {
    color: var(--accent-red);
}

/* Score Display */
.score-display {
    text-align: center;
    background: rgba(59, 130, 246, 0.1);
    border: 2px solid var(--accent-blue);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
}

.score-number {
    font-size: 3rem;
    color: var(--accent-blue);
    font-weight: bold;
}

.score-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}