/* ================================================================
   Roadmap Tree - Professional XMind Style (v2)
   Built ONLY on the platform design-system variables:
   --primary --secondary --accent --dark --white
   --gray-100..500 --section-bg --success --warning --danger
   These auto-adapt to the active light/dark mode.
   ================================================================ */

:root {
    --roadmap-bg: var(--section-bg);
    --roadmap-card-bg: var(--white);
    --roadmap-border: var(--gray-100);
    --roadmap-text-primary: var(--dark);
    --roadmap-text-secondary: var(--gray-500);
    --roadmap-text-muted: var(--gray-400);
    --roadmap-accent: var(--primary);
    --roadmap-accent-2: var(--accent);
    --roadmap-accent-light: color-mix(in srgb, var(--primary) 10%, var(--white));
    --roadmap-success: var(--success);
    --roadmap-success-light: color-mix(in srgb, var(--success) 12%, var(--white));
    --roadmap-warning: var(--warning);
    --roadmap-warning-light: color-mix(in srgb, var(--warning) 12%, var(--white));
    --roadmap-danger: var(--danger);
    --roadmap-danger-light: color-mix(in srgb, var(--danger) 10%, var(--white));
    --roadmap-shadow-sm: 0 1px 2px 0 rgba(2, 20, 45, 0.05);
    --roadmap-shadow: 0 6px 16px -8px rgba(2, 20, 45, 0.14);
    --roadmap-shadow-lg: 0 16px 40px -20px rgba(2, 20, 45, 0.28);
    --roadmap-radius: 12px;
    --roadmap-radius-lg: 16px;
    --roadmap-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --roadmap-transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.roadmap-page {
    background: var(--roadmap-bg);
    min-height: 100vh;
}

/* ===== Hero ===== */
.roadmap-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 68%, var(--primary-saturated) 135%);
    border-radius: 24px;
    padding: 32px 34px;
    margin-bottom: 24px;
    box-shadow: 0 26px 55px -32px color-mix(in srgb, var(--secondary) 70%, transparent);
}

.roadmap-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(560px 300px at 90% -20%, rgba(255, 255, 255, 0.12), transparent 60%),
        radial-gradient(460px 260px at -5% 120%, rgba(255, 255, 255, 0.1), transparent 60%);
}

.roadmap-hero__inner {
    position: relative;
    z-index: 2;
}

.roadmap-hero__title {
    font-size: clamp(24px, 3.2vw, 34px);
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
    margin: 0 0 10px;
    line-height: 1.3;
}

.roadmap-hero__subtitle {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.82);
    line-height: 1.75;
    max-width: 640px;
    margin: 0;
}

.roadmap-hero__bottom {
    margin-top: 24px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.roadmap-hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.roadmap-hero__stat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
}

.roadmap-hero__stat svg {
    opacity: 0.85;
}

/* ===== Buttons ===== */
.roadmap-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.roadmap-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 10px;
    border: 1px solid var(--roadmap-border);
    background: var(--roadmap-card-bg);
    color: var(--roadmap-text-secondary);
    cursor: pointer;
    transition: var(--roadmap-transition);
    white-space: nowrap;
    box-shadow: var(--roadmap-shadow-sm);
}

.roadmap-btn:hover {
    background: var(--roadmap-accent-light);
    border-color: var(--roadmap-accent);
    color: var(--roadmap-accent);
    transform: translateY(-1px);
    box-shadow: var(--roadmap-shadow);
}

.roadmap-btn:active {
    transform: translateY(0);
}

.roadmap-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.5;
}

.roadmap-btn--light {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.28);
    color: #fff;
    box-shadow: none;
}

.roadmap-btn--light:hover {
    background: #fff;
    border-color: #fff;
    color: var(--primary);
}

.roadmap-hero .roadmap-btn--primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--secondary);
}

.roadmap-hero .roadmap-btn--primary:hover {
    background: #fff;
    border-color: #fff;
    color: var(--secondary);
}

.roadmap-btn--primary {
    background: var(--roadmap-accent);
    border-color: var(--roadmap-accent);
    color: #fff;
}

.roadmap-btn--primary:hover {
    background: var(--primary-hover, var(--roadmap-accent));
    border-color: var(--primary-hover, var(--roadmap-accent));
    color: #fff;
}

.roadmap-btn--danger {
    background: var(--roadmap-danger-light);
    border-color: color-mix(in srgb, var(--roadmap-danger) 35%, var(--white));
    color: var(--roadmap-danger);
    box-shadow: none;
}

.roadmap-btn--danger:hover {
    background: var(--roadmap-danger);
    border-color: var(--roadmap-danger);
    color: #fff;
}

/* ===== Header (progress card) ===== */
.roadmap-header {
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
    border-radius: var(--roadmap-radius-lg);
    box-shadow: var(--roadmap-shadow);
    padding: 24px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}

.roadmap-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--roadmap-accent), var(--roadmap-accent-2), var(--roadmap-success));
    opacity: 0.85;
}

.roadmap-progress-section {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.roadmap-overall-wrap {
    flex: 1;
    min-width: 280px;
}

.roadmap-progress-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.roadmap-progress-label-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--roadmap-text-primary);
}

.roadmap-progress-label-value {
    font-size: 13px;
    font-weight: 800;
    color: var(--roadmap-accent);
    font-variant-numeric: tabular-nums;
}

.roadmap-bar {
    height: 10px;
    background: var(--roadmap-border);
    border-radius: 999px;
    overflow: hidden;
    position: relative;
}

.roadmap-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--roadmap-accent), var(--roadmap-success));
    border-radius: 999px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.roadmap-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== Track colors (shared by forest + legend) ===== */
.roadmap-tree-root[data-track="web-development"],
.roadmap-legend__item[data-track="web-development"] { --track-color: #2f80ed; }

.roadmap-tree-root[data-track="backend-apis"],
.roadmap-legend__item[data-track="backend-apis"] { --track-color: #7c5cff; }

.roadmap-tree-root[data-track="mobile-applications"],
.roadmap-legend__item[data-track="mobile-applications"] { --track-color: #e0558b; }

.roadmap-tree-root[data-track="computer-science"],
.roadmap-legend__item[data-track="computer-science"] { --track-color: #00b8d9; }

.roadmap-tree-root[data-track="systems-infrastructure"],
.roadmap-legend__item[data-track="systems-infrastructure"] { --track-color: #f2994a; }

.roadmap-tree-root[data-track="data-analytics"],
.roadmap-legend__item[data-track="data-analytics"] { --track-color: #27ae60; }

.roadmap-tree-root[data-track="professional-skills"],
.roadmap-legend__item[data-track="professional-skills"] { --track-color: #eb5757; }

.roadmap-tree-root {
    --track-light: color-mix(in srgb, var(--track-color) 11%, var(--white));
}

/* ===== Legend ===== */
.roadmap-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.roadmap-legend__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
    font-size: 12px;
    font-weight: 600;
    color: var(--roadmap-text-secondary);
    box-shadow: var(--roadmap-shadow-sm);
    transition: var(--roadmap-transition);
}

.roadmap-legend__item:hover {
    color: var(--roadmap-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--roadmap-shadow);
}

.roadmap-legend__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--track-color);
    flex: 0 0 10px;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--track-color) 18%, transparent);
}

/* ===== Search / Filter ===== */
.roadmap-search-card {
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
}

/* ===== Tree Forest ===== */
.roadmap-forest {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.roadmap-tree-root {
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
    border-radius: var(--roadmap-radius-lg);
    box-shadow: var(--roadmap-shadow-sm);
    overflow: hidden;
    transition: var(--roadmap-transition);
}

.roadmap-tree-root:hover {
    box-shadow: var(--roadmap-shadow);
    border-color: var(--roadmap-accent);
}

.roadmap-tree-root.open {
    box-shadow: var(--roadmap-shadow-lg);
    border-color: var(--roadmap-accent);
}

.roadmap-root-handle {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 22px;
    cursor: pointer;
    user-select: none;
    flex-wrap: wrap;
    transition: var(--roadmap-transition);
    position: relative;
}

.roadmap-root-handle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 60px;
    right: 22px;
    height: 1px;
    background: var(--roadmap-border);
    opacity: 0;
    transition: var(--roadmap-transition);
}

.roadmap-tree-root.open .roadmap-root-handle::after {
    opacity: 1;
}

.roadmap-root-handle:hover {
    background: var(--track-light);
}

.roadmap-chevron {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--track-light);
    color: var(--track-color);
    flex: 0 0 28px;
    transition: var(--roadmap-transition);
}

.roadmap-tree-root.open .roadmap-chevron {
    transform: rotate(90deg);
    background: var(--track-color);
    color: #fff;
}

.roadmap-root-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--track-light);
    color: var(--track-color);
    flex: 0 0 40px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.roadmap-root-icon svg {
    width: 20px;
    height: 20px;
}

.roadmap-root-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--roadmap-text-primary);
    letter-spacing: -0.01em;
    flex: 1;
    min-width: 150px;
}

.roadmap-root-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.roadmap-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    background: var(--track-light);
    color: var(--track-color);
    white-space: nowrap;
}

.roadmap-chip svg {
    width: 14px;
    height: 14px;
}

.roadmap-root-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-inline-start: auto;
    min-width: 180px;
    flex: 1 1 180px;
}

.roadmap-progress-bar {
    flex: 1;
    height: 8px;
    background: var(--roadmap-border);
    border-radius: 999px;
    overflow: hidden;
    min-width: 100px;
}

.roadmap-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--track-color);
    border-radius: 999px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.roadmap-progress-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

.roadmap-progress-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--track-color);
    min-width: 40px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.roadmap-root-body {
    display: none;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.roadmap-tree-root.open > .roadmap-root-body {
    display: block;
}

/* Connection lines for tree structure */
.roadmap-tree-root.open > .roadmap-root-body > .roadmap-tree {
    position: relative;
    padding-inline-start: 22px;
}

.roadmap-tree-root.open > .roadmap-root-body > .roadmap-tree::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    inline-start: 10px;
    width: 2px;
    background: linear-gradient(180deg, var(--track-color), transparent);
    opacity: 0.3;
    border-radius: 1px;
}

.roadmap-tree {
    list-style: none;
    margin: 0;
    padding: 0;
}

.roadmap-branch {
    position: relative;
    padding-inline-start: 18px;
}

.roadmap-branch::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    inline-start: -10px;
    width: 2px;
    background: var(--roadmap-border);
    border-radius: 1px;
    transition: var(--roadmap-transition);
}

.roadmap-branch.open::before {
    background: var(--track-color);
    opacity: 0.5;
}

.roadmap-branch:not(:last-child) {
    padding-bottom: 8px;
}

.roadmap-branch-handle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px 14px 20px;
    cursor: pointer;
    user-select: none;
    flex-wrap: wrap;
    transition: var(--roadmap-transition);
    border-radius: var(--roadmap-radius);
    margin: 4px 0;
}

.roadmap-branch-handle:hover {
    background: var(--track-light);
}

.roadmap-branch-handle .roadmap-chevron {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
    background: var(--track-light);
    color: var(--track-color);
}

.roadmap-branch.open .roadmap-branch-handle .roadmap-chevron {
    transform: rotate(90deg);
    background: var(--track-color);
    color: #fff;
}

.roadmap-check {
    display: flex;
    align-items: center;
    cursor: pointer;
    flex: 0 0 auto;
}

.roadmap-check input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.roadmap-box {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: 2px solid var(--roadmap-border);
    background: var(--roadmap-card-bg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--roadmap-transition);
    box-shadow: var(--roadmap-shadow-sm);
}

.roadmap-box::after {
    content: '';
    width: 10px;
    height: 6px;
    border: solid #fff;
    border-width: 0 0 2px 2px;
    transform: rotate(-45deg) translate(1px, -1px);
    opacity: 0;
    transition: var(--roadmap-transition);
}

.roadmap-check input:checked + .roadmap-box {
    background: var(--track-color);
    border-color: var(--track-color);
    box-shadow: 0 0 0 3px var(--track-light);
}

.roadmap-check input:checked + .roadmap-box::after {
    opacity: 1;
}

.roadmap-check input:focus-visible + .roadmap-box {
    outline: 2px solid var(--track-color);
    outline-offset: 2px;
}

.roadmap-node {
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--track-light);
    color: var(--track-color);
    font-weight: 700;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: var(--roadmap-transition);
}

.roadmap-branch.done .roadmap-node {
    background: var(--track-color);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.roadmap-course-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--roadmap-text-primary);
    text-decoration: none;
    min-width: 0;
    flex: 1;
    min-width: 180px;
    line-height: 1.4;
    transition: var(--roadmap-transition);
}

.roadmap-course-title:hover {
    color: var(--track-color);
    text-decoration: none;
}

.roadmap-branch.done .roadmap-course-title {
    color: var(--roadmap-text-muted);
    text-decoration: line-through;
}

.roadmap-start-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 999px;
    background: var(--roadmap-success-light);
    color: var(--roadmap-success);
    white-space: nowrap;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 40%, transparent); }
    50% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--success) 0%, transparent); }
}

.roadmap-branch-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-inline-start: auto;
    flex-wrap: wrap;
}

.roadmap-meta {
    font-size: 11px;
    font-weight: 600;
    color: var(--roadmap-text-secondary);
    background: var(--roadmap-border);
    border-radius: 999px;
    padding: 3px 10px;
    white-space: nowrap;
}

.roadmap-open {
    font-size: 12px;
    font-weight: 600;
    color: var(--track-color);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 6px;
    transition: var(--roadmap-transition);
}

.roadmap-open:hover {
    background: var(--track-light);
    text-decoration: none;
}

.roadmap-branch-body {
    display: none;
    animation: slideDown 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 8px 0 8px 16px;
}

.roadmap-branch.open > .roadmap-branch-body {
    display: block;
}

/* Module Leaves */
.roadmap-leaves {
    list-style: none;
    margin: 8px 0 0;
    padding: 0 0 0 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.roadmap-leaf {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
    border-radius: 10px;
    padding: 10px 14px;
    transition: var(--roadmap-transition);
    position: relative;
}

.roadmap-leaf::before {
    content: '';
    position: absolute;
    inset-inline-start: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--track-color);
    opacity: 0.5;
    box-shadow: 0 0 0 3px var(--track-light);
}

.roadmap-leaf:hover {
    background: var(--track-light);
    border-color: var(--track-color);
    transform: translateX(4px);
}

.roadmap-leaf-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--roadmap-text-primary);
    flex: 1;
    min-width: 0;
    line-height: 1.4;
}

.roadmap-leaf-count {
    font-size: 11px;
    font-weight: 600;
    color: var(--track-color);
    background: var(--track-light);
    border-radius: 999px;
    padding: 2px 10px;
    white-space: nowrap;
}

/* Related Articles */
.roadmap-related {
    margin: 16px 0 0 30px;
    padding: 14px 18px;
    background: color-mix(in srgb, var(--warning) 8%, var(--white));
    border: 1px solid color-mix(in srgb, var(--warning) 30%, var(--white));
    border-radius: 12px;
    border-inline-start: 4px solid var(--warning);
}

.roadmap-related-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    color: color-mix(in srgb, var(--warning) 55%, var(--dark));
    margin-bottom: 10px;
}

.roadmap-related-label::before {
    content: '';
    width: 18px;
    height: 18px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e0b060' stroke-width='2'%3E%3Cpath d='M4 19.5A7 7 0 0 1 12 6a7 7 0 0 1 8 13.5'/%3E%3Cpath d='M9 14l3 3 6-6'/%3E%3C/svg%3E") center/contain no-repeat;
}

.roadmap-article-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    background: var(--white);
    color: color-mix(in srgb, var(--warning) 55%, var(--dark));
    border: 1px solid color-mix(in srgb, var(--warning) 35%, var(--white));
    text-decoration: none;
    transition: var(--roadmap-transition);
    box-shadow: var(--roadmap-shadow-sm);
}

.roadmap-article-chip:hover {
    background: color-mix(in srgb, var(--warning) 15%, var(--white));
    border-color: var(--warning);
    transform: translateY(-1px);
    box-shadow: var(--roadmap-shadow);
    text-decoration: none;
}

/* ===== Knowledge Library ===== */
.roadmap-knowledge-section {
    margin-top: 48px;
}

.roadmap-knowledge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.roadmap-knowledge-title {
    font-size: 22px;
    font-weight: 800;
    color: var(--roadmap-text-primary);
    margin: 0;
}

.roadmap-knowledge-hint {
    font-size: 14px;
    color: var(--roadmap-text-secondary);
    margin: 0;
    max-width: 500px;
}

.roadmap-knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.roadmap-knowledge-card {
    display: flex;
    flex-direction: column;
    padding: 24px;
    background: var(--roadmap-card-bg);
    border: 1px solid var(--roadmap-border);
    border-radius: var(--roadmap-radius-lg);
    text-decoration: none;
    transition: var(--roadmap-transition-slow);
    position: relative;
    overflow: hidden;
}

.roadmap-knowledge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--roadmap-accent), var(--roadmap-accent-2));
    opacity: 0;
    transition: var(--roadmap-transition);
}

.roadmap-knowledge-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--roadmap-shadow-lg);
    border-color: var(--roadmap-accent);
    text-decoration: none;
}

.roadmap-knowledge-card:hover::before {
    opacity: 1;
}

.roadmap-knowledge-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--roadmap-text-primary);
    margin: 0 0 8px;
    line-height: 1.4;
}

.roadmap-knowledge-card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--roadmap-text-secondary);
    margin-top: auto;
}

.roadmap-knowledge-card-count {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 999px;
    background: var(--roadmap-accent-light);
    color: var(--roadmap-accent);
}

/* No results */
.roadmap-no-results {
    text-align: center;
    padding: 48px 24px;
    color: var(--roadmap-text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .roadmap-root-handle {
        padding: 16px 18px;
    }

    .roadmap-root-title {
        font-size: 15px;
    }
}

@media (max-width: 767px) {
    .roadmap-hero {
        padding: 22px 18px;
        border-radius: 18px;
    }

    .roadmap-hero__title {
        font-size: 22px;
    }

    .roadmap-header {
        padding: 18px;
        border-radius: 0;
        margin: 0 -16px 20px;
    }

    .roadmap-actions {
        width: 100%;
        justify-content: space-between;
        margin-top: 12px;
    }

    .roadmap-btn {
        flex: 1;
        justify-content: center;
        padding: 10px 12px;
        font-size: 12px;
    }

    .roadmap-btn span {
        display: none;
    }

    .roadmap-btn svg {
        margin: 0;
    }

    .roadmap-progress-section {
        flex-direction: column;
        align-items: stretch;
    }

    .roadmap-overall-wrap {
        min-width: 0;
    }

    .roadmap-tree-root {
        margin: 0 -12px;
        border-radius: 0;
        border-inline: none;
    }

    .roadmap-root-handle {
        padding: 14px 16px;
    }

    .roadmap-root-icon {
        width: 36px;
        height: 36px;
    }

    .roadmap-root-title {
        font-size: 14px;
    }

    .roadmap-branch-handle {
        padding: 12px 14px 12px 16px;
    }

    .roadmap-leaves {
        padding-inline-start: 8px;
    }

    .roadmap-leaf {
        padding: 8px 12px;
    }

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

/* Print styles */
@media print {
    .roadmap-actions,
    .roadmap-progress-section,
    .roadmap-legend,
    .roadmap-chevron,
    .roadmap-check,
    .roadmap-open {
        display: none !important;
    }

    .roadmap-hero,
    .roadmap-header {
        box-shadow: none;
    }

    .roadmap-tree-root,
    .roadmap-branch,
    .roadmap-leaf {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .roadmap-root-body,
    .roadmap-branch-body {
        display: block !important;
    }
}