/* CSS Variables */
:root {
    --primary-blue: #1890ff;
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --text-dark: #333;
    --text-medium: #444;
    --text-light: #666;
    --border-light: #e0e0e0;
    --border-lighter: #f0f0f0;
    --hover-bg: #f0f0f0;
    --green-success: #52c41a;
    --orange-warning: #faad14;
    --red-error: #ff4d4f;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* Typography */
h1 {
    font-size: 24px;
    margin-bottom: 32px;
    color: var(--text-dark);
}

h2 {
    font-size: 21px;
    margin-top: 64px;
    border-top: 1px solid #ddd;
    padding-top: 24px;
    margin-bottom: 32px;
    color: var(--text-medium);
}

h3 {
    margin-left: 24px;
    padding: 16px;
    border-left: 3px solid var(--primary-blue);
    background-color: #f5f7fa;
    margin-top: 32px;
    font-size: 16px;
    color: var(--text-medium);
}

p,
li {
    line-height: 1.6;
    margin-bottom: 16px;
}

h3+p {
    margin-left: 20px;
}

ul,
ol {
    padding-left: 25px;
    margin-bottom: 20px;
}

/* Links */
a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s ease;
    margin: 0 1px;
}

a:hover {
    color: #40a9ff;
    text-decoration: underline;
}

a:visited {
    color: #096dd9;
}

a:active {
    color: #0050b3;
}

.external-link {
    border-bottom: 1px solid rgba(24, 144, 255, 0.3);
    transition: all 0.2s ease;
}

.external-link::after {
    content: "↗";
    font-size: 0.75em;
    opacity: 0.7;
    margin-left: 1px;
    display: inline-block;
    vertical-align: super;
    transition: opacity 0.2s ease;
}

.external-link:hover::after {
    opacity: 1;
}

/* Layout */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.home-icon,
.settings-icon {
    width: 24px;
    height: 24px;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.2s ease;
}

.home-icon:hover,
.settings-icon:hover {
    color: var(--primary-blue);
}

.breadcrumb {
    font-size: 14px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-icon {
    width: 16px;
    height: 16px;
}

.main-container {
    display: flex;
    min-height: calc(100vh - 60px);
    margin-top: 60px;
    width: 100%;
}

.sidebar {
    width: 280px;
    background-color: var(--bg-white);
    border-right: 1px solid var(--border-light);
    overflow-y: auto;
    position: fixed;
    top: 60px;
    bottom: 0;
    left: 0;
    z-index: 900;
}

.content-wrapper {
    width: calc(100% - 280px);
    margin-left: 280px;
}

.content {
    max-width: 900px;
    padding: 20px 40px;
    margin: 0 auto;
}

/* Navigation */
.nav-section {
    margin-bottom: 8px;
}

.nav-section-header {
    padding: 16px 20px 8px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-item,
.nav-subitem {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-light);
    font-size: 14px;
    border-bottom: 1px solid #f8f8f8;
    transition: all 0.2s ease;
}

.nav-subitem {
    padding-left: 52px;
    font-size: 13px;
}

.nav-item:hover,
.nav-subitem:hover {
    background-color: var(--hover-bg);
    color: var(--text-dark);
}

.nav-item.active {
    background-color: var(--hover-bg);
    color: var(--text-dark);
    border-left: 3px solid var(--primary-blue);
    padding-left: 17px;
}

.nav-subitem.active {
    color: var(--primary-blue);
    font-weight: 500;
    background-color: var(--hover-bg);
}

/* Lesson Indicators */
.lesson-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid #ddd;
    margin-right: 12px;
    flex-shrink: 0;
    position: relative;
    background-color: var(--bg-white);
}

.lesson-indicator.completed {
    background-color: var(--green-success);
    border-color: var(--green-success);
}

.lesson-indicator.completed::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 11px;
    font-weight: bold;
}

.lesson-indicator.current {
    border-color: var(--primary-blue);
    background-color: var(--primary-blue);
}

.lesson-indicator.current::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background-color: white;
    border-radius: 50%;
}

/* Content Components */
.data-item,
.next-steps-item {
    margin-left: 35px;
    padding: 8px 16px;
    margin-bottom: 8px;
    border-radius: 4px;
    display: flex;
    align-items: flex-start;
}

.next-steps-item {
    border-left: 2px solid var(--primary-blue);
    margin-bottom: 16px;
    padding: 12px 16px;
}

.data-item-bullet,
.next-steps-number {
    margin-right: 8px;
    flex-shrink: 0;
}

.next-steps-number {
    font-weight: bold;
    color: var(--primary-blue);
}

.data-item-content {
    flex: 1;
}

/* Policy Components */
.policy-item {
    margin: 20px 0;
    padding: 16px 20px;
    border-left: 3px solid var(--primary-blue);
    background-color: #f8faff;
    border-radius: 4px;
}

.policy-item-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 8px;
}

.policy-number {
    font-weight: bold;
    color: var(--primary-blue);
    margin-right: 8px;
    flex-shrink: 0;
    font-size: 16px;
}

.policy-title {
    font-weight: 600;
    color: var(--text-dark);
    margin-right: 8px;
}

.policy-description {
    margin-left: 24px;
    color: var(--text-medium);
    line-height: 1.5;
}

/* Callouts */
.callout {
    padding: 16px;
    border-radius: 5px;
    margin: 16px 48px 32px;
}

.callout-note {
    background-color: #e6f7ff;
    border-left: 4px solid var(--primary-blue);
}

.callout-tip {
    background-color: #fffbe6;
    border-left: 4px solid var(--orange-warning);
}

.callout-important {
    background-color: #fff1f0;
    border-left: 4px solid var(--red-error);
}

.callout-example {
    background-color: #f6ffed;
    border-left: 4px solid var(--green-success);
}

.callout-emoji,
.callout-title {
    font-weight: bold;
    margin-right: 5px;
}

/* Scope Panel */
.scope-info-panel {
    position: fixed;
    top: 60px;
    right: -400px;
    width: 360px;
    height: calc(100vh - 60px);
    background-color: white;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.15);
    transition: right 0.3s ease;
    z-index: 950;
    overflow-y: auto;
    padding: 20px;
}

.scope-info-panel.active {
    right: 0;
}

.panel-close {
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-light);
}

.panel-close:hover {
    color: var(--red-error);
}

.panel-content {
    margin-top: 40px;
}

.panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 940;
    display: none;
}

.panel-overlay.active {
    display: block;
}

/* Scope Components */
.scope-term {
    border-bottom: 1px dashed rgba(24, 144, 255, 0.5);
    cursor: pointer;
    position: relative;
    display: inline-block;
}

.scope-term:hover {
    color: var(--primary-blue);
}

.scope-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    flex-shrink: 0;
    font-weight: bold;
    color: white;
}

.scope-1-icon {
    background-color: var(--red-error);
}

.scope-2-icon {
    background-color: var(--orange-warning);
}

.scope-3-icon {
    background-color: var(--green-success);
}

.market-based-icon {
    background-color: var(--primary-blue);
}

.scope-item,
.market-based-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-lighter);
}

.scope-details h4 {
    margin: 0 0 8px 0;
    font-size: 16px;
}

.scope-details p {
    margin: 0 0 8px 0;
    font-size: 14px;
    line-height: 1.6;
}

.scope-examples {
    margin-top: 8px;
    background-color: #f9f9f9;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 13px;
}

.scope-examples ul {
    margin: 4px 0;
    padding-left: 20px;
}

.scope-examples li {
    margin-bottom: 4px;
}

/* Hover Effects */
.trigger-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .content-wrapper {
        width: 100%;
        margin-left: 0;
    }

    .scope-info-panel {
        width: 280px;
    }
}

/* Navigation Link Override */
.sidebar a {
    color: var(--text-light) !important;
    text-decoration: none !important;
}

.sidebar a:visited,
.sidebar a:active,
.sidebar a:focus {
    color: var(--text-light) !important;
}

.sidebar a:hover {
    color: var(--text-dark) !important;
}

.sidebar a.active {
    color: var(--text-dark) !important;
}

.sidebar .nav-subitem.active {
    color: var(--primary-blue) !important;
}