/* === CSS Variables === */
:root {
    --primary: #4A90D9;
    --primary-dark: #357ABD;
    --bg: #f5f5f5;
    --card-bg: #ffffff;
    --text: #333333;
    --text-light: #777777;
    --amber: #F5A623;
    --red: #D0021B;
    --green: #7ED321;
    --border: #e0e0e0;
    --radius: 12px;
}

/* === 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;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === App Container === */
#app {
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: 80px;
}

/* === App Header === */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.app-header h1 {
    font-size: 24px;
    font-weight: 700;
}

.app-header .settings-btn {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-light);
    padding: 4px;
}

/* === Card === */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* === Task Item === */
.task-item {
    display: flex;
    flex-direction: row;
    gap: 12px;
    padding: 14px 16px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    margin-bottom: 8px;
    align-items: center;
    border-left: 3px solid transparent;
}

.task-item .check {
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.task-item .check.completed {
    background-color: var(--green);
    border-color: var(--green);
}

.task-item .info .name {
    font-size: 16px;
    font-weight: 500;
}

.task-item .info .meta {
    font-size: 13px;
    color: var(--text-light);
}

.task-item.overdue {
    border-left: 3px solid var(--amber);
}

.task-item.nagging {
    border-left: 3px solid var(--red);
}

.task-item .household-icon {
    font-size: 14px;
    color: var(--text-light);
}

/* === Filter Tabs === */
.filter-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.filter-tabs::-webkit-scrollbar {
    display: none;
}

.filter-tabs button {
    flex-shrink: 0;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
}

.filter-tabs button.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* === Bottom Nav === */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--border);
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 100;
}

.bottom-nav a {
    text-decoration: none;
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 11px;
    gap: 2px;
    padding: 4px 12px;
}

.bottom-nav a .icon {
    font-size: 20px;
}

.bottom-nav a.active {
    color: var(--primary);
}

/* === Buttons === */
.btn {
    display: block;
    width: 100%;
    padding: 14px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:active {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:active {
    background: var(--bg);
}

/* === Inputs === */
.input {
    display: block;
    width: 100%;
    padding: 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font-size: 16px;
    background: var(--card-bg);
    color: var(--text);
    outline: none;
}

.input:focus {
    border-color: var(--primary);
}

/* === Onboarding === */
.onboarding-title {
    font-size: 22px;
    font-weight: 700;
}

.onboarding-subtitle {
    color: var(--text-light);
    margin-bottom: 24px;
}

/* === Tree Selector === */
.tree-item {
    padding: 8px 0;
}

.tree-item label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.tree-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
}

.tree-children {
    margin-left: 24px;
}

/* === Quiz Options === */
.quiz-option {
    display: block;
    width: 100%;
    padding: 14px;
    margin-bottom: 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    cursor: pointer;
    text-align: left;
    font-size: 15px;
    color: var(--text);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(74, 144, 217, 0.08);
}