/* ===== CSS Custom Properties (Dark Theme) ===== */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-input: #0d1117;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --danger: #f85149;
    --danger-hover: #da3633;
    --success: #3fb950;
    --success-hover: #2ea043;
    --warning: #d29922;
    --flash-success-bg: #0d2818;
    --flash-success-text: #3fb950;
    --flash-error-bg: #2d1214;
    --flash-error-text: #f85149;
    --nav-bg: #010409;
    --card-bg: #161b22;
    --card-hover-shadow: rgba(0, 0, 0, 0.4);
    --tag-bg: #21262d;
    --hero-gradient: linear-gradient(135deg, #1a3a5c 0%, #2d1b4e 100%);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ===== Nav ===== */
nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--nav-bg);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-user {
    font-size: 0.875rem;
    opacity: 0.8;
}

.nav-link {
    font-size: 0.875rem;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 1;
}

/* ===== Hero / Landing ===== */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 60px - 60px);
    background: var(--hero-gradient);
    color: var(--text-primary);
    text-align: center;
    padding: 2rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2.5rem;
}

.btn-login {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

/* ===== Dashboard ===== */
.dashboard {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.dashboard h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.dashboard-greeting {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tile {
    display: block;
    padding: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tile:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--card-hover-shadow);
}

.tile h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tile p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== Denied ===== */
.denied {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 60px - 60px);
    text-align: center;
    padding: 2rem;
}

.denied h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--danger);
}

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

.btn-home {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-weight: 600;
    transition: opacity 0.2s;
}

.btn-home:hover {
    opacity: 0.85;
}

/* ===== Footer ===== */
footer {
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
}

/* ===== Dashboard Tile Badge ===== */
.tile-badge {
    display: inline-block;
    background: var(--danger);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* ===== Tasks App ===== */
.tasks-page {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.tasks-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

.tasks-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 3rem 1rem;
}

/* Task Sections */
.task-section {
    margin-bottom: 2rem;
}

.task-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.task-section--overdue h2 {
    color: var(--danger);
}

.task-section--due-soon h2 {
    color: var(--warning);
}

/* Task Cards */
.task-card {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.task-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--card-hover-shadow);
}

.task-card--overdue {
    border-left: 4px solid var(--danger);
}

.task-card--due-soon {
    border-left: 4px solid var(--warning);
}

.task-card-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.task-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.task-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.task-frequency {
    display: inline-block;
    font-size: 0.75rem;
    background: var(--tag-bg);
    color: var(--text-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
}

.task-card-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
    align-items: center;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-complete {
    padding: 0.5rem 1rem;
    background: var(--success);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-complete:hover {
    background: var(--success-hover);
}

.btn-edit,
.btn-history {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: background 0.2s;
}

.btn-edit:hover,
.btn-history:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.btn-danger {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-danger:hover {
    background: var(--danger-hover);
}

/* Task Form */
.task-form {
    max-width: 600px;
}

.task-form label {
    display: block;
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.task-form input[type="text"],
.task-form input[type="number"],
.task-form textarea,
.task-form select {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-input);
    color: var(--text-primary);
}

.task-form textarea {
    min-height: 80px;
    resize: vertical;
}

.interval-row {
    display: flex;
    gap: 0.75rem;
}

.interval-row input {
    flex: 1;
}

.interval-row select {
    flex: 1;
}

.freq-fields {
    margin-top: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.delete-form {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Flash Messages */
.flash {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.flash-success {
    background: var(--flash-success-bg);
    color: var(--flash-success-text);
    border: 1px solid var(--success);
}

.flash-error {
    background: var(--flash-error-bg);
    color: var(--flash-error-text);
    border: 1px solid var(--danger);
}

/* History Table */
.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.history-table th,
.history-table td {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Category badge on task cards ===== */
.task-category {
    display: inline-block;
    font-size: 0.75rem;
    background: var(--accent);
    color: #fff;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    margin-left: 0.25rem;
}

/* ===== Header actions group ===== */
.tasks-header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* ===== View toggle ===== */
.view-toggle {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    width: fit-content;
}

.view-toggle-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.view-toggle-btn:last-child {
    border-right: none;
}

.view-toggle-btn:hover {
    background: var(--bg-tertiary);
}

.view-toggle-btn--active {
    background: var(--accent);
    color: #fff;
}

.view-toggle-btn--active:hover {
    background: var(--accent-hover);
}

/* ===== Category create row ===== */
.category-create-form {
    margin-bottom: 1rem;
}

.category-create-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.category-create-row input {
    flex: 1;
}

/* ===== Manual history entry form ===== */
.history-add-form {
    background: var(--bg-secondary);
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.history-add-form h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.history-add-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.history-add-row label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.history-add-row input[type="date"],
.history-add-row input[type="text"],
.history-add-row input[type="number"] {
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-input);
    color: var(--text-primary);
}

/* ===== Small button variant ===== */
.btn-sm {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
}

/* ===== Log Viewer ===== */
.log-viewer {
    margin-top: 1rem;
}

.log-output {
    background: var(--nav-bg);
    color: var(--text-secondary);
    font-family: "SF Mono", "Menlo", "Monaco", "Courier New", monospace;
    font-size: 0.8rem;
    line-height: 1.5;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 70vh;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ===== Admin Page ===== */
.admin-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
    margin-bottom: 2rem;
}

.admin-info-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}

.admin-info-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.admin-info-value {
    font-size: 1rem;
    font-weight: 600;
}

/* ===== Dashboard Summary ===== */
.dashboard-summary {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.summary-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem;
}

.summary-card-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.summary-card-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.summary-card-value--danger {
    color: var(--danger);
}

.summary-card-value--warning {
    color: var(--warning);
}

.summary-card-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ===== Quick-Add Templates ===== */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.template-card {
    display: block;
    padding: 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: transform 0.2s, border-color 0.2s;
}

.template-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.template-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.template-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.template-section {
    margin-bottom: 2rem;
}

.template-section h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* ===== Assignment avatar ===== */
.task-assignee {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    margin-right: 0.5rem;
    vertical-align: middle;
    flex-shrink: 0;
}

.task-card-info h3 .task-assignee {
    font-size: 0.65rem;
}

/* ===== Cost display ===== */
.cost-value {
    color: var(--success);
    font-weight: 600;
}

.cost-total {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-weight: 600;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

    nav {
        padding: 1rem;
    }

    .dashboard {
        padding: 2rem 1rem;
    }

    .tasks-page {
        padding: 2rem 1rem;
    }

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

    .task-card {
        flex-direction: column;
    }

    .task-card-actions {
        margin-top: 0.75rem;
    }

    .dashboard-summary {
        grid-template-columns: 1fr 1fr;
    }

    .admin-info-grid {
        grid-template-columns: 1fr 1fr;
    }

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