/* Design System: Variáveis e Temas */
:root {
    --bg-app: #090d16;
    --bg-card: rgba(17, 24, 39, 0.75);
    --bg-card-hover: rgba(31, 41, 55, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-active: rgba(139, 92, 246, 0.5);
    
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --secondary: #06b6d4;
    --secondary-hover: #0891b2;
    --accent: #d946ef;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dark: #1f2937;
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.15);
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', Consolas, Monaco, monospace;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
    --glow: 0 0 20px rgba(139, 92, 246, 0.15);
}

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

body {
    background-color: var(--bg-app);
    background-image: 
        radial-gradient(at 10% 20%, rgba(139, 92, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(6, 182, 212, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Scrollbar Personalizada */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Layout Principal */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    padding: 16px;
    gap: 16px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 30%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge {
    font-size: 0.7rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 3px 8px;
    border-radius: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.3);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.progress-tracker {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
}

.progress-bar-container {
    width: 120px;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

/* Layout Main Content */
.app-main {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 16px;
    flex-grow: 1;
    min-height: 0; /* Permite scroll no conteúdo interno */
}

/* Sidebar: Cards de Questões */
.sidebar {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.2px;
}

.quest-list {
    padding: 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.quest-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.quest-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.quest-card.active {
    background: rgba(139, 92, 246, 0.08);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.quest-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.quest-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.quest-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.quest-status {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.quest-card.solved .quest-status {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* Área de Conteúdo */
.content-area {
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    padding-right: 4px;
}

/* Cards Gerais */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Top Row: Detalhes da Questão e Schema */
.top-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 16px;
}

/* Detalhes do Exercício */
.exercise-details {
    padding: 20px;
}

.exercise-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.exercise-difficulty {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    text-transform: uppercase;
}

.exercise-difficulty.fácil {
    background: rgba(16, 185, 129, 0.12);
    color: var(--success);
}
.exercise-difficulty.médio {
    background: rgba(245, 158, 11, 0.12);
    color: #f59e0b;
}
.exercise-difficulty.difícil {
    background: rgba(239, 68, 68, 0.12);
    color: var(--error);
}

.exercise-details h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.exercise-body {
    flex-grow: 1;
    font-size: 0.95rem;
    color: #e5e7eb;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.tip-container {
    background: rgba(6, 182, 212, 0.08);
    border-left: 3px solid var(--secondary);
    padding: 12px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    animation: slideIn 0.3s ease-out;
}

.tip-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    color: var(--secondary);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.tip-container p {
    font-size: 0.85rem;
    color: #cfd8dc;
}

.exercise-footer {
    display: flex;
    justify-content: flex-end;
}

/* Visualizador de Esquemas */
.schema-viewer {
    padding: 16px;
}

.schema-header h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.schema-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.schema-tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.schema-tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.schema-tab-btn.active {
    background: rgba(6, 182, 212, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.schema-body {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    overflow-y: auto;
    max-height: 140px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.schema-field {
    display: flex;
    justify-content: space-between;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.01);
    border-radius: 4px;
    border-left: 2px solid var(--primary);
}

.field-name {
    font-weight: 600;
    color: var(--text-main);
}

.field-type {
    color: var(--text-muted);
}

/* Editor de Código */
.editor-card {
    border-color: var(--border-color);
    transition: border-color 0.3s;
}

.editor-card:focus-within {
    border-color: var(--border-color-active);
    box-shadow: var(--glow);
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 18px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.editor-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
}

.editor-actions {
    display: flex;
    gap: 10px;
}

.editor-container {
    display: grid;
    grid-template-columns: 40px 1fr;
    height: 180px;
    background: rgba(0, 0, 0, 0.3);
}

.line-numbers {
    padding: 14px 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.15);
    background: rgba(0, 0, 0, 0.1);
    border-right: 1px solid var(--border-color);
    user-select: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

#sql-editor {
    width: 100%;
    height: 100%;
    padding: 14px;
    background: transparent;
    border: none;
    outline: none;
    color: #a7f3d0; /* tom esverdeado de console */
    font-family: var(--font-mono);
    font-size: 0.95rem;
    resize: none;
    line-height: 1.5;
}

/* Painel de Resultados */
.results-card {
    min-height: 250px;
    flex-grow: 1;
}

.results-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 14px 16px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.results-content {
    padding: 16px;
    flex-grow: 1;
    overflow-y: auto;
    position: relative;
    background: rgba(0, 0, 0, 0.1);
}

.tab-pane {
    display: none;
    height: 100%;
    animation: fadeIn 0.3s ease-out;
}

.tab-pane.active {
    display: block;
}

.message-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 180px;
    color: var(--text-muted);
    gap: 12px;
}

.message-placeholder p {
    font-size: 0.9rem;
}

/* Estilos de Tabelas */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

th {
    background: rgba(255, 255, 255, 0.03);
    padding: 10px 14px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-main);
    font-family: var(--font-mono);
}

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

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Seletor de Tabela em Dados */
.schema-data-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.85rem;
    font-weight: 600;
}

.schema-data-selector select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    outline: none;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition);
}

.schema-data-selector select:focus {
    border-color: var(--primary);
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-tertiary {
    background: transparent;
    color: var(--secondary);
    padding: 4px 8px;
    font-size: 0.8rem;
}

.btn-tertiary:hover {
    color: var(--secondary-hover);
    text-decoration: underline;
}

/* Feedbacks de Validação (Balões / Mensagens) */
.feedback-box {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    line-height: 1.4;
    animation: slideIn 0.3s ease-out;
}

.feedback-box.success {
    background: var(--success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #a7f3d0;
}

.feedback-box.error {
    background: var(--error-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.feedback-icon {
    font-size: 1.2rem;
    line-height: 1;
}

/* Modais */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 8, 15, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.modal-card {
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 90%;
    max-width: 460px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 40px rgba(139, 92, 246, 0.2);
    animation: scaleUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px auto;
}

.modal-card h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, white, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-card p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 28px;
}

/* Animações Keyframes */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes scaleUp {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* Responsividade */
@media (max-width: 1024px) {
    .app-main {
        grid-template-columns: 1fr;
    }
    .app-container {
        height: auto;
        overflow-y: auto;
    }
    .app-header, .sidebar, .content-area {
        height: auto;
    }
}

@media (max-width: 768px) {
    .top-row {
        grid-template-columns: 1fr;
    }
}