/* ==========================================================================
   1. RESET & GLOBAL STYLES
   ========================================================================== */

:root {
    /* Palette */
    --color-verde: #D0FF59;
    --color-azul: #2D54FF;
    --color-roxo: #46049D;
    --color-rosa: #ff69b4;

    --color-primary-accent: var(--color-azul);
    --color-secondary-accent: var(--color-roxo);
    --color-success: var(--color-verde);
    --color-danger: var(--color-rosa);
    
    --color-background: #0D1117; /* Fundo principal (quase preto) */
    --color-surface: #161B22;    /* Superfície para cards e elementos elevados */
    --color-border: #30363D;     /* Bordas sutis */
    
    --color-text-primary: #E6EDF3;   /* Texto principal (branco suave) */
    --color-text-secondary: #8B949E; /* Texto secundário (cinza claro) */
    --color-text-on-accent: #FFFFFF;
    --color-text-on-success: #0D1117; /* Texto preto para fundo verde claro */

    /* Typography */
    --font-family-sans: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --space-1: 0.25rem; /* 4px */
    --space-2: 0.5rem;  /* 8px */
    --space-3: 0.75rem; /* 12px */
    --space-4: 1rem;    /* 16px */
    --space-5: 1.25rem; /* 20px */
    --space-6: 1.5rem;  /* 24px */
    --space-8: 2rem;    /* 32px */
    --space-12: 3rem;   /* 48px */

    /* Borders & Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-full: 9999px;

    /* Transitions */
    --transition-duration: 0.2s;
    --transition-timing-function: ease-in-out;
    --transition-base: all var(--transition-duration) var(--transition-timing-function);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    line-height: var(--line-height-base);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Custom Scrollbar */
body::-webkit-scrollbar {
    width: 10px;
}
body::-webkit-scrollbar-track {
    background: var(--color-background);
}
body::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: var(--border-radius-full);
    border: 2px solid var(--color-background);
}

/* ==========================================================================
   2. LAYOUT
   ========================================================================== */

.main-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    height: 100vh;
}

.sidebar {
    background-color: var(--color-background);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: var(--space-6);
    transition: width var(--transition-duration) var(--transition-timing-function);
}

.sidebar-header {
    margin-bottom: var(--space-8);
    text-align: center;
}

.logo {
    max-width: 140px;
    height: auto;
}

.main-nav ul {
    list-style: none;
}

.main-nav .nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    margin-bottom: var(--space-2);
}

.main-nav .nav-link:hover {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
}

.main-nav .nav-link.active {
    background-color: var(--color-success);
    color: var(--color-text-on-success);
    font-weight: 600;
}

.main-nav .nav-link.active svg {
    stroke: var(--color-text-on-success);
}

.main-nav .nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    text-align: center;
}

.main-content {
    padding: var(--space-8);
    overflow-y: auto;
}

.main-content::-webkit-scrollbar {
    width: 8px;
}
.main-content::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
}

.content-page {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.content-page.active {
    display: block;
}

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

/* ==========================================================================
   3. TYPOGRAPHY & SHARED
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

.page-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.page-header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 80ch;
    line-height: 1.5;
    margin-top: var(--space-2);
}

/* ==========================================================================
   4. COMPONENTS
   ========================================================================== */

/* --- Buttons --- */
.button-primary, .button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: 1px solid transparent;
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.button-primary {
    background-color: var(--color-primary-accent);
    color: var(--color-text-on-accent);
}

.button-primary:hover {
    filter: brightness(1.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.button-secondary {
    background-color: var(--color-secondary-accent);
    color: var(--color-text-on-accent);
    border-color: transparent;
}

.button-secondary:hover {
    filter: brightness(1.2);
}

/* --- Cards --- */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.card:hover {
    border-color: #58a6ff33;
    box-shadow: var(--shadow-lg);
}

.card-header {
    margin-bottom: var(--space-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.card-header h2 {
    margin: 0;
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--space-5);
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

input[type="date"],
input[type="text"],
input[type="password"],
input[type="number"],
input[type="time"],
textarea,
select {
    width: 100%;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-family: var(--font-family-sans);
    transition: var(--transition-base);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238B949E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    background-size: 1em;
    padding-right: calc(var(--space-4) * 2 + 1em);
}

input[type="date"]:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="time"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary-accent);
    box-shadow: 0 0 0 3px rgba(45, 84, 255, 0.25);
}

input[type="date"] {
    max-width: 180px;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-4);
    justify-content: flex-end;
}

/* ==========================================================================
   5. PAGE-SPECIFIC STYLES
   ========================================================================== */

/* --- Dashboard --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.stat-card {
    background: linear-gradient(145deg, var(--color-surface), #1C2128);
    padding: var(--space-5);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card h4 {
    margin: 0 0 var(--space-2) 0;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.stat-card p {
    margin: 0;
    font-size: 1.8rem; /* Reduzido para evitar quebra de linha */
    font-weight: 700;
    color: var(--color-text-primary);
    white-space: nowrap; /* Garante que o texto não quebre a linha */
    overflow: hidden; /* Esconde o excesso de texto */
    text-overflow: ellipsis; /* Adiciona "..." se o texto for muito longo */
}

.stats-grid .stat-card:nth-child(4n+1) p { color: var(--color-verde); }
.stats-grid .stat-card:nth-child(4n+2) p { color: var(--color-azul); }
.stats-grid .stat-card:nth-child(4n+3) p { color: var(--color-roxo); }
.stats-grid .stat-card:nth-child(4n+4) p { color: var(--color-rosa); }

.plotly-graph-div {
    width: 100%;
    min-height: 450px;
}

/* --- Settings --- */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

/* --- Data Table --- */
.table-container {
    overflow-x: auto;
}

.table-container table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

.table-container th,
.table-container td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.table-container th {
    font-weight: 600;
    background-color: var(--color-background);
    position: sticky;
    top: 0;
    z-index: 1;
}

.table-container tbody tr:hover {
    background-color: #1C2128; /* Um pouco mais claro que a superfície */
}

.table-container td:first-child,
.table-container th:first-child {
    padding-left: var(--space-6);
}

.table-container td:last-child,
.table-container th:last-child {
    padding-right: var(--space-6);
}

/* --- Toast Notifications --- */
#toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.toast {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--border-radius-md);
    color: var(--color-text-on-accent);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: slideUpFadeIn 0.5s forwards;
}
.toast.success { 
    background-color: var(--color-success);
    color: var(--color-text-on-success);
}
.toast.error { 
    background-color: var(--color-danger);
    color: var(--color-text-on-accent);
}

@keyframes slideUpFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   6. RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 220px 1fr;
    }
}

@media (max-width: 992px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        grid-row: 2;
        width: 100%;
        height: auto;
        border-right: none;
        border-top: 1px solid var(--color-border);
        flex-direction: row;
        justify-content: space-around;
        align-items: center;
        padding: var(--space-2) var(--space-4);
        position: fixed;
        bottom: 0;
        left: 0;
        z-index: 1000;
        background-color: var(--color-surface);
    }
    .sidebar-header, .sidebar-footer {
        display: none;
    }
    .main-nav ul {
        display: flex;
        gap: var(--space-2);
        width: 100%;
        justify-content: space-around;
    }
    .main-nav .nav-link {
        flex-direction: column;
        gap: var(--space-1);
        font-size: 0.75rem;
        padding: var(--space-2);
    }
    .main-nav .nav-link span {
        display: block;
    }
    .main-content {
        padding: var(--space-6);
        padding-bottom: 100px; /* Space for fixed sidebar */
    }
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }
    .settings-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    h1 { font-size: 1.75rem; }
    .page-header-main {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    .main-content {
        padding: var(--space-4);
        padding-bottom: 100px;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* --- Time Aggregation Buttons --- */
.time-agg-buttons {
    display: flex;
    background-color: var(--color-background);
    border-radius: var(--border-radius-md);
    padding: var(--space-1);
    border: 1px solid var(--color-border);
}

.agg-btn {
    padding: var(--space-2) var(--space-4);
    border: none;
    background-color: transparent;
    color: var(--color-text-secondary);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.agg-btn:hover {
    color: var(--color-text-primary);
}

.agg-btn.active {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-weight: 600;
}

/* --- Machine Learning Page --- */
.date-range-picker {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.inline-checkbox {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}
#ml-results-output {
    margin-top: var(--space-6);
}
/* Estilos para o select múltiplo (simples, pode ser melhorado com uma lib JS) */
select[multiple] {
    min-height: 150px;
    background-image: none;
    padding: var(--space-3);
}

/* --- Correlation Page --- */
.correlation-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--space-6);
}
.product-filter-container {
    border-right: 1px solid var(--color-border);
    padding-right: var(--space-6);
}
.product-filter-list {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.product-filter-list label {
    font-weight: 400;
}

/* --- Login Overlay --- */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}
.login-card {
    background-color: var(--color-surface);
    padding: var(--space-8);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.login-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}
.login-card .button-primary {
    width: 100%;
    margin-top: var(--space-4);
}
.error-message {
    color: var(--color-danger);
    margin-top: var(--space-4);
    min-height: 1.2em;
}