/*
========================================
Perplexity-Inspired Design System for Tracker App
Version: 3.5 (Full Responsiveness)
========================================
*/

/* 1. == GLOBAL SETUP & VARIABLES ==
---------------------------------------- */
:root {
    /* Base Font */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Color Palette */
    --c-bg: #101010;
    --c-bg-module: #1c1c1c;
    --c-bg-hover: #282828;
    --c-bg-active: #333333;

    --c-text-primary: #f3f3f3;
    --c-text-secondary: #a3a3a3;
    --c-text-muted: #707070;

    --c-border: #3a3a3a;
    --c-border-subtle: #2a2a2a;

    --c-accent: #3b82f6;
    --c-accent-hover: #2563eb;
    --c-danger: #ef4444;

    /* Chart Colors */
    --chart-color-1: #3b82f6;
    /* Blue */
    --chart-color-2: #10b981;
    /* Green */
    --chart-color-3: #f59e0b;
    /* Amber */
    --chart-color-4: #8b5cf6;
    /* Purple */
    --chart-color-5: #ec4899;
    /* Pink */
    --chart-color-6: #06b6d4;
    /* Cyan */

    /* Chart Theme Colors */
    --chart-grid-color: rgba(58, 58, 58, 0.3);
    --chart-bar-color: #3b82f6;
    --chart-bar-hover-color: #60a5fa;

    --c-primary-btn-bg: #f3f3f3;
    --c-primary-btn-text: #101010;
    --c-primary-btn-bg-hover: #ffffff;

    /* Sizing & Spacing */
    --sidebar-width: 240px;
    --main-content-max-width: 1350px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Chart Heights */
    --chart-height-main: 300px;
    --chart-height-secondary: 220px;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--c-bg);
    color: var(--c-text-primary);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 3rem 3rem;
}

/* 2. == LAYOUT & STRUCTURE ==
---------------------------------------- */
.dashboard {
    display: flex;
    height: 100vh;
    overflow: hidden;
    position: relative;
    /* Needed for mobile sidebar */
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--c-bg-module);
    border-right: 1px solid var(--c-border-subtle);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform var(--transition);
    z-index: 1100;
}

.main-content {
    flex-grow: 1;
    padding: 1.5rem 2.5rem;
    overflow-y: auto;
    width: calc(100% - var(--sidebar-width));
}

.content-container {
    max-width: var(--main-content-max-width);
    margin: 0 auto;
}

.centered-layout {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
}

/* 3. == REUSABLE MODULES & CARDS ==
---------------------------------------- */
.module {
    background-color: var(--c-bg-module);
    border: 1px solid var(--c-border-subtle);
    border-radius: var(--border-radius-lg);
    margin-bottom: 1.5rem;
}

.module__header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--c-border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.module__header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.module__body {
    padding: 1.5rem;
}

.module__footer {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.1);
    border-top: 1px solid var(--c-border-subtle);
}

/* 4. == TYPOGRAPHY ==
---------------------------------------- */
.page-header {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header__title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.page-header__date {
    color: var(--c-text-muted);
    font-size: 0.9rem;
}

.text-right {
    text-align: right;
}

.cell--muted {
    color: var(--c-text-muted);
}

/* 5. == COMPONENTS ==
---------------------------------------- */
/* --- Buttons --- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color var(--transition), border-color var(--transition);
    text-decoration: none;
}

.button--primary {
    background-color: var(--c-primary-btn-bg);
    color: var(--c-primary-btn-text);
}

.button--primary:hover {
    background-color: var(--c-primary-btn-bg-hover);
}

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

.button--secondary:hover {
    background-color: var(--c-bg-hover);
    border-color: var(--c-text-secondary);
}

.button--subtle {
    color: var(--c-text-secondary);
    background-color: transparent;
}

.button--subtle:hover {
    background-color: var(--c-bg-hover);
    color: var(--c-text-primary);
}

.button--full-width {
    width: 100%;
}

.button-icon {
    background-color: transparent;
    border: 1px solid var(--c-border);
    color: var(--c-text-secondary);
    width: 34px;
    height: 34px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.button-icon:hover {
    background-color: var(--c-bg-hover);
    border-color: var(--c-text-secondary);
    color: var(--c-text-primary);
}

.button-icon--danger:hover {
    border-color: #fca5a5;
    background-color: #450a0a;
    color: #fecaca;
}

/* --- Forms --- */
.form-input {
    width: 100%;
    height: 38px;
    background-color: var(--c-bg);
    border: 1px solid var(--c-border);
    color: var(--c-text-primary);
    border-radius: var(--border-radius-md);
    padding: 0 0.75rem;
    font-size: 0.9rem;
    transition: border-color var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--c-text-secondary);
}

select.form-input {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    padding-right: 2.5rem;
    /* Make space for the arrow */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23a3a3a3'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd' /%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25em;
    cursor: pointer;
}


/* --- Sidebar --- */
.sidebar__brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
    padding: 0.2rem;
}

.sidebar__brand i {
    font-size: 1.6rem;
    color: var(--c-text-primary);
    line-height: 1; /* Ensures consistent vertical alignment */
}

.sidebar__brand h2 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1; /* Ensures consistent vertical alignment */
}

.sidebar__nav {
    flex-grow: 1;
}

.nav-links {
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    color: var(--c-text-secondary);
    font-weight: 500;
    transition: background-color var(--transition), color var(--transition);
    margin-bottom: 0.3rem;
}

.nav-item:hover {
    background-color: var(--c-bg-hover);
    color: var(--c-text-primary);
}

.nav-item.active {
    background-color: var(--c-bg-active);
    color: var(--c-text-primary);
}

.sidebar__footer {
    margin-top: auto;
}

/* --- Mobile Navigation --- */
.mobile-nav-toggle {
    display: none;
    /* Hidden on desktop */
}

.sidebar-close-btn {
    display: none;
    /* Hidden on desktop */
}

.mobile-overlay {
    display: none;
    /* Hidden on desktop */
}

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

/* Custom Scrollbar */
.table-wrapper::-webkit-scrollbar {
    height: 10px;
}

.table-wrapper::-webkit-scrollbar-track {
    background-color: var(--c-bg);
    border-radius: 10px;
}

.table-wrapper::-webkit-scrollbar-thumb {
    background-color: var(--c-bg-active);
    border-radius: 10px;
    border: 2px solid var(--c-bg);
}

.table-wrapper::-webkit-scrollbar-thumb:hover {
    background-color: #4f4f4f;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table thead th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 500;
    color: var(--c-text-secondary);
    font-size: 0.8rem;
    border-bottom: 1px solid var(--c-border-subtle);
}

.data-table__row:hover {
    background-color: var(--c-bg-hover);
}

.data-table td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--c-border-subtle);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.cell-truncate {
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--c-text-secondary);
}

.pagination-info {
    font-size: 0.9rem;
    color: var(--c-text-secondary);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.visible {
    display: flex;
    opacity: 1;
}

.modal-dialog {
    background-color: var(--c-bg-module);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--c-border);
    width: 90%;
    max-width: 800px;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.visible .modal-dialog {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--c-border);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--c-text-secondary);
    font-size: 1.75rem;
    cursor: pointer;
    line-height: 1;
}

.modal-body {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.detail-group {
    display: flex;
    flex-direction: column;
}

.detail-group label {
    font-size: 0.8rem;
    color: var(--c-text-secondary);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.detail-group p {
    font-size: 1rem;
    color: var(--c-text-primary);
    word-break: break-all;
}

/* 6. == PAGE-SPECIFIC STYLES ==
---------------------------------------- */
/* --- Analytics --- */
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.analytics-main-chart {
    grid-column: 1 / -1;
}

.chart-container {
    position: relative;
    height: var(--chart-height-secondary);
    width: 100%;
}

.analytics-main-chart .chart-container {
    height: var(--chart-height-main);
}

.period-selector {
    display: flex;
    background-color: var(--c-bg);
    border-radius: var(--border-radius-md);
    padding: 0.25rem;
}

.period-btn {
    background: none;
    border: none;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--c-text-secondary);
    cursor: pointer;
    border-radius: var(--border-radius-md);
    transition: all var(--transition);
}

.period-btn.active {
    background-color: var(--c-bg-active);
    color: white;
}

.empty-chart-message {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* --- Filters --- */
.filter-module {
    padding: 1.5rem;
}

#filter-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.filter-row {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr auto;
    gap: 1rem;
    align-items: center;
}

.filter-controls {
    display: flex;
    gap: 1rem;
    padding-top: 1.5rem;
    margin-top: 1.5rem;
    border-top: 1px solid var(--c-border-subtle);
}

.filter-controls.filter-controls--no-filters {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}


/* --- Login & Error Pages --- */
.card-container {
    background-color: var(--c-bg-module);
    border: 1px solid var(--c-border-subtle);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.5s ease-out forwards;
}

.card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.card-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.card-header .icon {
    color: var(--c-text-primary);
}

.card-header p {
    color: var(--c-text-secondary);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--c-text-secondary);
}

.form-group .form-input {
    padding: 12px;
}

.form-group .error-message {
    color: var(--c-danger);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.turnstile-container {
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
}

/* --- Error Page --- */
.error-card {
    border-color: var(--c-border);
    background-color: var(--c-bg-module);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    text-align: center;
    padding: 3rem 2rem;
}

.error-card h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--c-text-primary);
}

.error-card p {
    color: var(--c-text-secondary);
    margin-bottom: 2rem;
}

.error-card .icon {
    color: var(--c-danger);
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.error-card .button {
    background-color: var(--c-accent);
    color: white;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
}

.error-card .button:hover {
    background-color: var(--c-accent-hover);
}

/* 7. == ANIMATIONS & HELPERS ==
---------------------------------------- */
.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* 8. == RESPONSIVE & MOBILE STYLES ==
---------------------------------------- */
@media (max-width: 1024px) {

    /* --- Layout --- */
    .sidebar {
        position: absolute;
        top: 0;
        left: 0;
        height: 100vh;
        transform: translateX(-100%);
    }

    .sidebar.is-visible {
        transform: translateX(0);
    }

    .main-content {
        width: 100%;
    }

    /* --- Mobile Navigation --- */
    .mobile-nav-toggle {
        display: inline-flex;
    }

    .sidebar-close-btn {
        display: inline-flex;
        position: absolute;
        top: 1rem;
        right: 1rem;
    }

    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.6);
        z-index: 1099;
        display: none;
        opacity: 0;
        transition: opacity var(--transition);
    }

    .mobile-overlay.is-visible {
        display: block;
        opacity: 1;
    }

    /* --- Page Header --- */
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .page-header__title {
        font-size: 1.75rem;
    }

    /* --- Data Table --- */
    .data-table thead {
        display: none;
    }

    .data-table tr {
        display: block;
        border-bottom: 2px solid var(--c-border);
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }

    .data-table tr:last-child {
        margin-bottom: 0;
        padding-bottom: 0;
        border-bottom: none;
    }

    .data-table td {
        display: block;
        text-align: right;
        border-bottom: 1px dotted var(--c-border-subtle);
        padding: 0.75rem 1rem;
    }

    .data-table td:last-child {
        border-bottom: none;
    }

    .data-table td::before {
        content: attr(data-label);
        float: left;
        font-weight: 500;
        color: var(--c-text-secondary);
        margin-right: 1rem;
    }

    .data-table .cell-truncate {
        max-width: none;
        white-space: normal;
        word-break: break-all;
    }

    /* --- Filters --- */
    .filter-row {
        grid-template-columns: 1fr;
    }

    .filter-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .filter-controls button {
        width: 100%;
    }

    /* --- Pagination --- */
    .module__footer {
        flex-direction: column;
        gap: 1rem;
    }
}


@media (max-width: 767px) {
    /* --- Layout & Typography --- */
    .main-content {
        padding: 1rem;
    }

    body {
        font-size: 15px;
    }

    /* --- Analytics --- */
    .analytics-grid {
        /* Ensure single column on small screens */
        grid-template-columns: 1fr;
    }

    .module__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .period-selector {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    /* --- Modal --- */
    .modal-body {
        grid-template-columns: 1fr;
    }

    .detail-group[style*="grid-column"] {
        grid-column: auto !important;
    }

    /* --- Login/Error Cards --- */
    .card-container {
        padding: 1.5rem;
    }
}