/**
 * ╔═══════════════════════════════════════════════════════════════════════════╗
 * ║                                                                           ║
 * ║                      CYBERWEB TUTORIALS STYLES                            ║
 * ║                                                                           ║
 * ║  Styles for all tutorial components.                                      ║
 * ║  Works with tutorials-config.js and tutorials-components.js               ║
 * ║                                                                           ║
 * ╚═══════════════════════════════════════════════════════════════════════════╝
 */

/* ═══════════════════════════════════════════════════════════════════════════
   CSS VARIABLES FOR TUTORIALS
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    /* Tutorial-specific colors */
    --tutorial-card-bg: rgba(255, 255, 255, 0.03);
    --tutorial-card-bg-hover: rgba(255, 255, 255, 0.06);
    --tutorial-card-border: rgba(255, 255, 255, 0.08);
    --tutorial-card-border-hover: rgba(0, 212, 255, 0.3);
    --tutorial-card-border-hover: rgba(0, 212, 255, 0.3);

--accent-cyan: #00d4ff;

/* Grid gaps */
    /* Grid gaps */
    --grid-gap: 1.5rem;
    --grid-gap-sm: 1rem;
    
    /* Transitions */
    --tutorial-transition: 0.3s ease;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TUTORIALS HERO SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.tutorials-hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.05) 0%, transparent 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 3rem;
}

.tutorials-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
}

.tutorials-hero__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.tutorials-hero__title .highlight {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tutorials-hero__subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.tutorials-hero__stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.hero-stat {
    text-align: center;
}

.hero-stat__value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.hero-stat__label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUBJECT HERO SECTION (For subject landing pages)
   ═══════════════════════════════════════════════════════════════════════════ */

.subject-hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(180deg, var(--subject-light, rgba(0, 212, 255, 0.05)) 0%, transparent 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 3rem;
}

.subject-hero__icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
}

.subject-hero__title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.subject-hero__description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.subject-hero__stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

/* ═══════════════════════════════════════════════════════════════════════════
   DIFFICULTY BADGES
   ═══════════════════════════════════════════════════════════════════════════ */

.difficulty-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--difficulty-color, #888);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--difficulty-color, #888);
    white-space: nowrap;
    transition: var(--tutorial-transition);
}

.difficulty-badge__icon {
    font-size: 0.875em;
}

.difficulty-badge__text {
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Badge sizes */
.difficulty-badge--small {
    padding: 0.15rem 0.5rem;
    font-size: 0.65rem;
}

.difficulty-badge--small .difficulty-badge__icon {
    font-size: 0.75em;
}

.difficulty-badge--large {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUBJECTS GRID & CARDS
   ═══════════════════════════════════════════════════════════════════════════ */

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--grid-gap);
    margin-bottom: 3rem;
}

.subject-card {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--subject-border, var(--tutorial-card-border));
    border-radius: 12px;
    text-decoration: none;
    transition: var(--tutorial-transition);
    position: relative;
    overflow: hidden;
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--subject-color, var(--accent-cyan));
    opacity: 0;
    transition: var(--tutorial-transition);
}

.subject-card:hover {
    background: var(--tutorial-card-bg-hover);
    border-color: var(--subject-color, var(--tutorial-card-border-hover));
    transform: translateY(-2px);
}

.subject-card:hover::before {
    opacity: 1;
}

.subject-card__icon {
    font-size: 2.5rem;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--subject-light, rgba(0, 212, 255, 0.1));
    border-radius: 12px;
}

.subject-card__content {
    flex: 1;
    min-width: 0;
}

.subject-card__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.subject-card__description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.subject-card__stats {
    display: flex;
    gap: 1.5rem;
}

.subject-card__stat {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.stat-icon {
    font-size: 0.9em;
}

.stat-value {
    font-weight: 600;
    color: var(--subject-color, var(--accent-cyan));
}

.subject-card__arrow {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: var(--tutorial-transition);
    align-self: center;
}

.subject-card:hover .subject-card__arrow {
    color: var(--subject-color, var(--accent-cyan));
    transform: translateX(4px);
}

/* ═══════════════════════════════════════════════════════════════════════════
   BRANCHES GRID & CARDS
   ═══════════════════════════════════════════════════════════════════════════ */

.branches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--grid-gap);
    margin-bottom: 3rem;
}

.branch-card {
    padding: 1.5rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 12px;
    transition: var(--tutorial-transition);
}

.branch-card:hover {
    background: var(--tutorial-card-bg-hover);
    border-color: rgba(255, 255, 255, 0.12);
}

.branch-card__header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.branch-card__icon {
    font-size: 1.5rem;
}

.branch-card__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.branch-card__description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.branch-card__subbranches {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.subbranch-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--tutorial-transition);
}

.subbranch-link:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--accent-cyan);
}

.subbranch-count {
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-muted);
}

.branch-card__footer {
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

/* ═══════════════════════════════════════════════════════════════════════════
   TUTORIALS GRID & CARDS
   ═══════════════════════════════════════════════════════════════════════════ */

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--grid-gap);
    margin-bottom: 2rem;
}

.tutorial-card-link {
    text-decoration: none;
    display: block;
}

.tutorial-card {
    padding: 1.25rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    transition: var(--tutorial-transition);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.tutorial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--difficulty-color, #888);
    border-radius: 10px 0 0 10px;
    opacity: 0.5;
    transition: var(--tutorial-transition);
}

.tutorial-card-link:hover .tutorial-card,
.tutorial-card:hover {
    background: var(--tutorial-card-bg-hover);
    border-color: var(--difficulty-color, var(--tutorial-card-border-hover));
    transform: translateY(-2px);
}

.tutorial-card-link:hover .tutorial-card::before,
.tutorial-card:hover::before {
    opacity: 1;
}

/* Coming soon overlay */
.tutorial-card--coming-soon {
    opacity: 0.6;
    cursor: default;
}

.tutorial-card--coming-soon::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    pointer-events: none;
}

.tutorial-card__coming-soon {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.2rem 0.6rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    z-index: 1;
}

.tutorial-card__header {
    margin-bottom: 0.75rem;
}

.tutorial-card__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.tutorial-card__description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex-grow: 1;
    margin-bottom: 1rem;
}

.tutorial-card__breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.breadcrumb-separator {
    opacity: 0.5;
}

.tutorial-card__footer {
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: auto;
}

.tutorial-card__action {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--difficulty-color, var(--accent-cyan));
    transition: var(--tutorial-transition);
}

.tutorial-card-link:hover .tutorial-card__action {
    color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUB-BRANCH SECTIONS
   ═══════════════════════════════════════════════════════════════════════════ */

.subbranch-section {
    margin-bottom: 3rem;
    scroll-margin-top: 100px;
}

.subbranch-section__header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.subbranch-section__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.subbranch-section__description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

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

/* ═══════════════════════════════════════════════════════════════════════════
   DIFFICULTY FILTER
   ═══════════════════════════════════════════════════════════════════════════ */

.difficulty-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.difficulty-filter__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--tutorial-transition);
}

.difficulty-filter__btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.difficulty-filter__btn.active {
    background: var(--filter-color, var(--accent-cyan));
    border-color: var(--filter-color, var(--accent-cyan));
    color: var(--bg-primary);
}

.filter-icon {
    font-size: 1em;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUBJECT FILTER
   ═══════════════════════════════════════════════════════════════════════════ */

.subject-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.subject-filter__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.25rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--tutorial-transition);
}

.subject-filter__btn:hover {
    background: var(--tutorial-card-bg-hover);
    border-color: var(--filter-color, rgba(255, 255, 255, 0.2));
    color: var(--filter-color, var(--text-primary));
}

.subject-filter__btn.active {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--filter-color, var(--accent-cyan));
    color: var(--filter-color, var(--accent-cyan));
}

/* ═══════════════════════════════════════════════════════════════════════════
   SEARCH BOX
   ═══════════════════════════════════════════════════════════════════════════ */

.tutorial-search {
    position: relative;
    max-width: 500px;
    margin: 0 auto 2rem;
}

.tutorial-search__input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.tutorial-search__icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    pointer-events: none;
}

.tutorial-search__input {
    width: 100%;
    padding: 0.875rem 2.5rem 0.875rem 3rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--tutorial-transition);
}

.tutorial-search__input::placeholder {
    color: var(--text-muted);
}

.tutorial-search__input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.05);
}

.tutorial-search__clear {
    position: absolute;
    right: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--tutorial-transition);
}

.tutorial-search__clear:hover {
    color: var(--text-primary);
}

/* Search Results Dropdown */
.tutorial-search__results {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 100;
    overflow: hidden;
}

.search-results-list {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.875rem 1rem;
    text-decoration: none;
    transition: var(--tutorial-transition);
}

.search-result-link:hover {
    background: rgba(255, 255, 255, 0.05);
}

.search-result-link.coming-soon {
    opacity: 0.6;
    cursor: default;
}

.search-result-content {
    flex: 1;
    min-width: 0;
}

.search-result-title {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.search-result-path {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.search-no-results {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.search-more {
    padding: 0.75rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ═══════════════════════════════════════════════════════════════════════════
   BREADCRUMB NAVIGATION
   ═══════════════════════════════════════════════════════════════════════════ */

.tutorial-breadcrumb {
    margin-bottom: 2rem;
}

.tutorial-breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.tutorial-breadcrumb__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tutorial-breadcrumb__link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--tutorial-transition);
}

.tutorial-breadcrumb__link:hover {
    color: var(--accent-cyan);
}

.breadcrumb-icon {
    font-size: 0.9em;
}

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

.tutorial-breadcrumb__current {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SIDEBAR NAVIGATION
   ═══════════════════════════════════════════════════════════════════════════ */

.subject-sidebar {
    position: sticky;
    top: 100px;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 12px;
    overflow: hidden;
}

.subject-sidebar__header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-icon {
    font-size: 1.25rem;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.subject-sidebar__list {
    list-style: none;
    margin: 0;
    padding: 0.5rem 0;
}

.sidebar-branch {
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.sidebar-branch:last-child {
    border-bottom: none;
}

.sidebar-branch__toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
    transition: var(--tutorial-transition);
}

.sidebar-branch__toggle:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.branch-icon {
    font-size: 1em;
}

.branch-name {
    flex: 1;
}

.branch-arrow {
    font-size: 0.7rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.sidebar-branch.expanded .branch-arrow,
.sidebar-branch.active .branch-arrow {
    transform: rotate(90deg);
}

.sidebar-subbranches {
    list-style: none;
    margin: 0;
    padding: 0;
    display: none;
    background: rgba(0, 0, 0, 0.1);
}

.sidebar-branch.expanded .sidebar-subbranches,
.sidebar-branch.active .sidebar-subbranches {
    display: block;
}

.sidebar-subbranch__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.25rem 0.6rem 2.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--tutorial-transition);
}

.sidebar-subbranch__link:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--accent-cyan);
}

/* ═══════════════════════════════════════════════════════════════════════════
   DIFFICULTY PROGRESS BAR
   ═══════════════════════════════════════════════════════════════════════════ */

.difficulty-progress {
    padding: 1rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    margin-bottom: 2rem;
}

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

.difficulty-progress__track {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.difficulty-progress__step {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    position: relative;
    transition: var(--tutorial-transition);
}

.difficulty-progress__step.active {
    background: var(--step-color, #888);
}

.difficulty-progress__step .step-icon {
    position: absolute;
    top: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    opacity: 0.3;
    transition: var(--tutorial-transition);
}

.difficulty-progress__step.active .step-icon {
    opacity: 1;
}

/* ═══════════════════════════════════════════════════════════════════════════
   QUICK STATS
   ═══════════════════════════════════════════════════════════════════════════ */

.quick-stats {
    padding: 1.5rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 12px;
    margin-bottom: 2rem;
}

.quick-stats__title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.quick-stats__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 0.75rem;
}

.quick-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    text-align: center;
}

.quick-stat__icon {
    font-size: 1.25rem;
}

.quick-stat__count {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--stat-color, var(--accent-cyan));
}

.quick-stat__label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ═══════════════════════════════════════════════════════════════════════════
   NO CONTENT MESSAGE
   ═══════════════════════════════════════════════════════════════════════════ */

.no-content {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
    font-size: 1rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TUTORIALS PAGE LAYOUT
   ═══════════════════════════════════════════════════════════════════════════ */

.tutorials-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    padding-top: 100px;
}

.tutorials-page__header {
    margin-bottom: 2rem;
}

.tutorials-page__title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tutorials-page__subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Two-column layout for subject pages */
.tutorials-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
}

.tutorials-layout__sidebar {
    position: relative;
}

.tutorials-layout__content {
    min-width: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE ADJUSTMENTS
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
    .tutorials-layout {
        grid-template-columns: 1fr;
    }
    
    .subject-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    .tutorials-hero {
        padding: 3rem 1.5rem;
    }
    
    .tutorials-hero__stats {
        gap: 2rem;
    }
    
    .hero-stat__value {
        font-size: 1.5rem;
    }
    
    .subjects-grid {
        grid-template-columns: 1fr;
    }
    
    .subject-card {
        flex-direction: column;
        text-align: center;
    }
    
    .subject-card__stats {
        justify-content: center;
    }
    
    .subject-card__arrow {
        display: none;
    }
    
    .branches-grid {
        grid-template-columns: 1fr;
    }
    
    .tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .difficulty-filter {
        justify-content: center;
    }
    
    .subject-filter {
        justify-content: center;
    }
    
    .tutorial-search {
        margin-left: 1rem;
        margin-right: 1rem;
    }
}

@media (max-width: 480px) {
    .tutorials-hero__title {
        font-size: 1.75rem;
    }
    
    .tutorials-hero__stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .difficulty-filter__btn .filter-text {
        display: none;
    }
    
    .difficulty-filter__btn {
        padding: 0.5rem 0.75rem;
    }
    
    .subject-filter__btn .filter-text {
        display: none;
    }
    
    .subject-filter__btn {
        padding: 0.6rem 0.9rem;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════════════════════════ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subject-card,
.branch-card,
.tutorial-card {
    animation: fadeInUp 0.4s ease forwards;
}

.subjects-grid .subject-card:nth-child(1) { animation-delay: 0.1s; }
.subjects-grid .subject-card:nth-child(2) { animation-delay: 0.15s; }
.subjects-grid .subject-card:nth-child(3) { animation-delay: 0.2s; }
.subjects-grid .subject-card:nth-child(4) { animation-delay: 0.25s; }
.subjects-grid .subject-card:nth-child(5) { animation-delay: 0.3s; }

.tutorials-grid .tutorial-card-link:nth-child(1) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(1) { animation-delay: 0.05s; }
.tutorials-grid .tutorial-card-link:nth-child(2) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(2) { animation-delay: 0.1s; }
.tutorials-grid .tutorial-card-link:nth-child(3) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(3) { animation-delay: 0.15s; }
.tutorials-grid .tutorial-card-link:nth-child(4) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(4) { animation-delay: 0.2s; }
.tutorials-grid .tutorial-card-link:nth-child(5) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(5) { animation-delay: 0.25s; }
.tutorials-grid .tutorial-card-link:nth-child(6) .tutorial-card,
.tutorials-grid .tutorial-card:nth-child(6) { animation-delay: 0.3s; }

/* ═══════════════════════════════════════════════════════════════════════════
   SECTION 20: INDIVIDUAL TUTORIAL PAGE STYLES
   ═══════════════════════════════════════════════════════════════════════════
   
   These styles apply to individual tutorial pages like:
   - /tutorials/linux/terminal/introduction.html
   - /tutorials/privacy/tor-browser-guide.html
   - All future tutorial pages
   
   Moving these from inline <style> to this file means:
   ✓ All tutorial pages get consistent styling
   ✓ No need to copy styles into each new tutorial
   ✓ One place to update styles for all tutorials
   
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   TUTORIAL PAGE LAYOUT
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-main {
    min-height: 100vh;
    padding-top: 100px; /* Space for fixed header */
}

.tutorial-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.tutorial-header-section {
    padding: 2rem 0;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.03) 0%, transparent 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 2rem;
}

.tutorial-title-section {
    margin-top: 1.5rem;
}

.tutorial-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.75rem 0 0.5rem;
    line-height: 1.3;
}

.tutorial-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Two Column Layout */
.tutorial-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 3rem;
    margin-bottom: 3rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   TUTORIAL CONTENT STYLING
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-content {
    min-width: 0;
}

.tutorial-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    scroll-margin-top: 100px;
}

.tutorial-content h2:first-child {
    margin-top: 0;
}

.tutorial-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2rem 0 0.75rem;
}

.tutorial-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.tutorial-content strong {
    color: var(--text-primary);
}

/* ───────────────────────────────────────────────────────────────────────────
   CODE BLOCKS
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-content pre {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1.25rem 0;
    overflow-x: auto;
}

.tutorial-content pre code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    color: var(--accent-cyan);
    background: none;
    padding: 0;
}

.tutorial-content code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875em;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

/* ───────────────────────────────────────────────────────────────────────────
   TUTORIAL LISTS
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-list {
    margin: 1.25rem 0;
    padding-left: 1.5rem;
}

.tutorial-list li {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   KEYBOARD SHORTCUTS
   ─────────────────────────────────────────────────────────────────────────── */

.keyboard-shortcut {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 1.25rem 0;
}

kbd {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
}

/* ───────────────────────────────────────────────────────────────────────────
   INFO, WARNING, SUCCESS BOXES
   ─────────────────────────────────────────────────────────────────────────── */

.info-box, 
.warning-box, 
.success-box {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: 10px;
    margin: 1.5rem 0;
}

.info-box {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.warning-box {
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.success-box {
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.info-box__icon, 
.warning-box__icon, 
.success-box__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.info-box__content, 
.warning-box__content, 
.success-box__content {
    flex: 1;
}

.info-box__content strong, 
.warning-box__content strong, 
.success-box__content strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.info-box__content p, 
.warning-box__content p, 
.success-box__content p {
    margin: 0;
    font-size: 0.95rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   STEP BOXES (Numbered Steps)
   ─────────────────────────────────────────────────────────────────────────── */

.step-box {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    margin: 0.75rem 0;
}

.step-box__number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-cyan);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-box__content {
    flex: 1;
    padding-top: 0.25rem;
}

.step-box__content strong {
    color: var(--text-primary);
}

/* ───────────────────────────────────────────────────────────────────────────
   DEFINITION LIST
   ─────────────────────────────────────────────────────────────────────────── */

.definition-list {
    margin: 1.25rem 0;
}

.definition-item {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.definition-item:last-child {
    border-bottom: none;
}

.definition-term {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.95rem;
    color: var(--accent-cyan);
    font-weight: 600;
    min-width: 120px;
}

.definition-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ───────────────────────────────────────────────────────────────────────────
   TUTORIAL SIDEBAR (Table of Contents)
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Table of Contents Card */
.toc-card {
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    padding: 1.25rem;
}

.toc-card__title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

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

.toc-item {
    margin-bottom: 0.25rem;
}

.toc-link {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
}

.toc-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.toc-link.active {
    color: var(--accent-cyan);
    border-left-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.05);
}

/* ───────────────────────────────────────────────────────────────────────────
   PREVIOUS / NEXT NAVIGATION
   ─────────────────────────────────────────────────────────────────────────── */

.tutorial-nav {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    margin: 3rem 0;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.tutorial-nav__link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem 1.25rem;
    background: var(--tutorial-card-bg);
    border: 1px solid var(--tutorial-card-border);
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s ease;
    max-width: 45%;
}

.tutorial-nav__link:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

.tutorial-nav__link--prev {
    align-items: flex-start;
}

.tutorial-nav__link--next {
    align-items: flex-end;
    text-align: right;
}

.tutorial-nav__label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tutorial-nav__title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.tutorial-nav__spacer {
    flex: 1;
}

/* ───────────────────────────────────────────────────────────────────────────
   RELATED TUTORIALS SECTION
   ─────────────────────────────────────────────────────────────────────────── */

.related-tutorials-section {
    margin-bottom: 3rem;
}

.related-tutorials-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   TUTORIAL PAGE RESPONSIVE
   ─────────────────────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
    .tutorial-layout {
        grid-template-columns: 1fr;
    }

    .tutorial-sidebar {
        position: static;
        order: -1;
    }

    .toc-card {
        display: none; /* Hide TOC on mobile */
    }
}

@media (max-width: 600px) {
    .tutorial-nav {
        flex-direction: column;
    }

    .tutorial-nav__link {
        max-width: 100%;
    }

    .tutorial-nav__link--next {
        align-items: flex-start;
        text-align: left;
    }

    .definition-item {
        flex-direction: column;
        gap: 0.25rem;
    }

    .definition-term {
        min-width: auto;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SECTION 21: SUBJECT LANDING PAGE STYLES
   ═══════════════════════════════════════════════════════════════════════════
   
   These styles apply to subject landing pages like:
   - /tutorials/linux/index.html
   - /tutorials/windows/index.html
   - /tutorials/privacy/index.html
   - All future subject pages
   
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   PAGE SECTIONS
   ─────────────────────────────────────────────────────────────────────────── */

/* Filter Section */
.filter-section {
    margin-bottom: 2rem;
}

/* Branches Section */
.branches-section {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* All Tutorials Section */
.all-tutorials-section {
    margin-bottom: 3rem;
}

/* Related Section */
.related-section {
    margin-top: 4rem;
    margin-bottom: 4rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ───────────────────────────────────────────────────────────────────────────
   SECTION HEADERS (Left Aligned)
   ─────────────────────────────────────────────────────────────────────────── */

.section-header-left {
    margin-bottom: 1.5rem;
}

.section-title-left {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.section-subtitle-left {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ───────────────────────────────────────────────────────────────────────────
   SECTION HEADERS (Centered)
   ─────────────────────────────────────────────────────────────────────────── */

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

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ───────────────────────────────────────────────────────────────────────────
   BRANCH TUTORIALS SECTION
   ─────────────────────────────────────────────────────────────────────────── */

.branch-tutorials-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.branch-tutorials-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.branch-tutorials-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--subject-color, var(--accent-cyan));
}

.branch-tutorials-icon {
    font-size: 1.5rem;
}

.branch-tutorials-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ───────────────────────────────────────────────────────────────────────────
   SUBJECT PAGE RESPONSIVE
   ─────────────────────────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
    .branches-section {
        display: none; /* Hide branch cards on tablet, keep tutorials visible */
    }
}

@media (max-width: 768px) {
    .section-title-left {
        font-size: 1.25rem;
    }

    .branch-tutorials-header {
        flex-wrap: wrap;
    }
}