/* ============================================
   COMPONENTS - Cards, Code Blocks, Alerts, etc.
   ============================================ */

/* ---- Hero Section ---- */
.hero-section {
    background: var(--gradient-hero);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(97, 218, 251, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section h1 {
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ---- Info Cards ---- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.card-icon.blue { background: rgba(97, 218, 251, 0.12); }
.card-icon.purple { background: rgba(168, 85, 247, 0.12); }
.card-icon.green { background: rgba(34, 197, 94, 0.12); }
.card-icon.yellow { background: rgba(245, 158, 11, 0.12); }
.card-icon.red { background: rgba(239, 68, 68, 0.12); }
.card-icon.cyan { background: rgba(34, 211, 238, 0.12); }
.card-icon.pink { background: rgba(236, 72, 153, 0.12); }
.card-icon.orange { background: rgba(249, 115, 22, 0.12); }

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-heading);
    margin: 0;
}

.card-body p {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.card-grid .card {
    margin-bottom: 0;
}

/* Mini Card */
.mini-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: all var(--transition-normal);
}

.mini-card:hover {
    border-color: var(--border-active);
}

.mini-card-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-react);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mini-card p {
    font-size: 0.85rem;
    margin: 0;
}

/* ---- Code Block ---- */
.code-block {
    margin: 1.25rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-code);
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--bg-code-header);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.78rem;
}

.code-block-lang {
    color: var(--accent-react);
    font-weight: 600;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.code-block-filename {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.code-copy-btn {
    padding: 0.2rem 0.6rem;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-xs);
    color: var(--text-muted);
    font-size: 0.72rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.code-copy-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

.code-copy-btn.copied {
    color: var(--accent-green);
    border-color: var(--accent-green);
}

.code-block pre {
    margin: 0 !important;
    border-radius: 0 !important;
    border: none !important;
    background: var(--bg-code) !important;
}

.code-block pre code {
    font-family: var(--font-mono) !important;
    font-size: 0.82rem !important;
    line-height: 1.65 !important;
    tab-size: 2;
    background: transparent !important;
    border: none !important;
    padding: 1rem !important;
    color: #e2e8f0 !important;
    white-space: pre !important;
}

/* ---- Alert Boxes ---- */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin: 1.25rem 0;
    border-left: 4px solid;
    font-size: 0.9rem;
}

.alert-title {
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.alert p {
    margin: 0;
    font-size: 0.88rem;
}

.alert-info {
    background: rgba(97, 218, 251, 0.06);
    border-color: var(--accent-react);
}
.alert-info .alert-title { color: var(--accent-react); }

.alert-success {
    background: rgba(34, 197, 94, 0.06);
    border-color: var(--accent-green);
}
.alert-success .alert-title { color: var(--accent-green); }

.alert-warning {
    background: rgba(245, 158, 11, 0.06);
    border-color: var(--accent-yellow);
}
.alert-warning .alert-title { color: var(--accent-yellow); }

.alert-danger {
    background: rgba(239, 68, 68, 0.06);
    border-color: var(--accent-red);
}
.alert-danger .alert-title { color: var(--accent-red); }

.alert-tip {
    background: rgba(168, 85, 247, 0.06);
    border-color: var(--accent-purple);
}
.alert-tip .alert-title { color: var(--accent-purple); }

/* ---- Concept Definition ---- */
.concept-def {
    background: var(--gradient-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.concept-def .concept-name {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-react);
    margin-bottom: 0.5rem;
}

.concept-def .concept-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ---- Feature Grid ---- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-item:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.feature-item .feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    display: block;
}

.feature-item .feature-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.4rem;
}

.feature-item p {
    font-size: 0.82rem;
    margin: 0;
    color: var(--text-muted);
}

/* ---- Tabs ---- */
.tabs-container {
    margin: 1.5rem 0;
}

.tabs-header {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 0;
}

.tab-btn {
    padding: 0.65rem 1.25rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-react);
    border-bottom-color: var(--accent-react);
}

.tab-content {
    display: none;
    padding: 1.5rem 0;
}

.tab-content.active {
    display: block;
}

/* ---- Step List ---- */
.step-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
    counter-reset: step-counter;
}

.step-item {
    counter-increment: step-counter;
    display: flex;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.step-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 0.85rem;
    font-weight: 700;
    color: #0f172a;
    flex-shrink: 0;
}

.step-number::before {
    content: counter(step-counter);
}

.step-content h4 {
    margin-top: 0;
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.step-content p {
    font-size: 0.88rem;
    margin-bottom: 0.5rem;
}

/* ---- Section Divider ---- */
.section-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2.5rem 0;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.section-divider span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 600;
    white-space: nowrap;
}

/* ---- Comparison Box ---- */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
}

.comparison-col {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.comparison-col-header {
    padding: 0.65rem 1rem;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.comparison-col.do .comparison-col-header {
    background: rgba(34, 197, 94, 0.08);
    color: var(--accent-green);
}

.comparison-col.dont .comparison-col-header {
    background: rgba(239, 68, 68, 0.08);
    color: var(--accent-red);
}

.comparison-col-body {
    padding: 1rem;
}

/* ---- Tag / Badge ---- */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.tag-blue { background: rgba(97, 218, 251, 0.12); color: var(--accent-react); }
.tag-purple { background: rgba(168, 85, 247, 0.12); color: var(--accent-purple); }
.tag-green { background: rgba(34, 197, 94, 0.12); color: var(--accent-green); }
.tag-yellow { background: rgba(245, 158, 11, 0.12); color: var(--accent-yellow); }
.tag-red { background: rgba(239, 68, 68, 0.12); color: var(--accent-red); }

/* ---- Accordion ---- */
.accordion {
    margin: 1.5rem 0;
}

.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    background: var(--bg-card);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-heading);
    transition: all var(--transition-fast);
    user-select: none;
}

.accordion-header:hover {
    background: var(--bg-card-hover);
}

.accordion-chevron {
    transition: transform var(--transition-normal);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.accordion-item.open .accordion-chevron {
    transform: rotate(180deg);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-body-inner {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
}

/* ---- Diagram / Flow ---- */
.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 2rem 1rem;
    margin: 1.5rem 0;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
}

.flow-box {
    padding: 0.75rem 1.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-heading);
    text-align: center;
    min-width: 100px;
}

.flow-box.highlight {
    border-color: var(--accent-react);
    background: rgba(97, 218, 251, 0.08);
    color: var(--accent-react);
}

.flow-arrow {
    color: var(--accent-react);
    font-size: 1.25rem;
    flex-shrink: 0;
}