/**
 * Collapsible Sections Styles
 *
 * Provides styling for the [no_codesnippet_collapsible] shortcode
 * including line clamp, fade overlays, and state transitions.
 *
 * @package Vibe_Coding
 */

/* ========================================
   Container & Layout
   ======================================== */

.vc-collapsible-container {
    position: relative;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: var(--border-radius, 8px);
    background: var(--bg-color, #ffffff);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.vc-collapsible-container:hover {
    border-color: var(--primary-color, #3b82f6);
}

/* ========================================
   Details & Summary
   ======================================== */

.vc-collapsible-details {
    position: relative;
}

.vc-collapsible-details > summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
}

/* Remove default marker in various browsers */
.vc-collapsible-details > summary::-webkit-details-marker,
.vc-collapsible-details > summary::marker {
    display: none;
}

.vc-collapsible-summary {
    display: block;
    padding: 1.25rem 1.5rem;
    background: var(--bg-secondary, #f9fafb);
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    transition: background-color 0.2s ease;
}

.vc-collapsible-summary:hover {
    background: var(--bg-hover, #f3f4f6);
}

.vc-collapsible-summary:focus {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: -2px;
}

/* ========================================
   Title & Toggle Button
   ======================================== */

.vc-collapsible-title {
    font-weight: 600;
    font-size: 1.125rem;
    line-height: 1.5;
    color: var(--text-color, #1f2937);
    margin: 0;
}

.vc-collapsible-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: transparent;
    color: var(--text-color, #1f2937);
    border: 1px solid var(--text-color, #1f2937);
    border-radius: var(--border-radius, 6px);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-2px);
}

.vc-collapsible-toggle:hover {
    background: var(--primary-color, #3b82f6);
    color: #ffffff;
}

.vc-collapsible-toggle:focus {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: 2px;
}

/* Reveal toggle only when open */
.vc-collapsible-details[open] .vc-collapsible-toggle {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Icon rotation on open */
.vc-collapsible-icon {
    transition: transform 0.3s ease;
}

.vc-collapsible-details[open] .vc-collapsible-icon {
    transform: rotate(180deg);
}

/* ========================================
   Preview Section (with height-based fade)
   ======================================== */

.vc-collapsible-preview {
    position: relative;
    padding: 1.5rem;
    padding-bottom: 4rem; /* Extra space for button */
    overflow: hidden;
    max-height: var(--preview-height, 250px);
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

/* Fade overlay effect */
.vc-collapsible-preview::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--bg-color, #ffffff));
    pointer-events: none;
    transition: opacity 0.3s ease;
}

/* Centered expand button */
.vc-collapsible-expand-btn {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-color, #3b82f6);
    background: var(--bg-color, #ffffff);
    border: 1px solid var(--primary-color, #3b82f6);
    border-radius: var(--border-radius, 6px);
    cursor: pointer;
    transition: all 0.15s ease;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.vc-collapsible-expand-btn:hover {
    background: var(--primary-color, #3b82f6);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.vc-collapsible-expand-btn:focus {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: 2px;
}

/* Hide preview when details is open */
.vc-collapsible-details[open] + .vc-collapsible-preview {
    max-height: 0;
    opacity: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.vc-collapsible-details[open] + .vc-collapsible-preview::after {
    opacity: 0;
}

/* ========================================
   Content Section
   ======================================== */

.vc-collapsible-content {
    padding: 0 1.5rem;
    background: var(--bg-color, #ffffff);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
}

.vc-collapsible-details[open] .vc-collapsible-content {
    padding: 1.5rem;
    opacity: 1;
    /* max-height will be set by JS for smooth animation */
}

.vc-collapsible-content .vc-prose {
    max-width: none;
}

/* ========================================
   Code Blocks & Copy Buttons
   ======================================== */

.vc-collapsible-content pre {
    position: relative;
    margin: 1rem 0;
    padding: 1rem;
    background: #f8fafc;
    color: #334155;
    border-radius: var(--border-radius, 6px);
    overflow-x: auto;
    font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
    font-size: 0.875rem;
    line-height: 1.7;
}

.vc-collapsible-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.vc-collapsible-code-block-wrapper {
    position: relative;
}

.vc-collapsible-copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: #475569;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(51, 65, 85, 0.2);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.vc-collapsible-copy-btn:hover {
    background: rgba(226, 232, 240, 0.95);
    border-color: rgba(51, 65, 85, 0.3);
}

.vc-collapsible-copy-btn:focus {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: 2px;
}

.vc-collapsible-copy-btn.copied {
    background: #10b981;
    border-color: #34d399;
    color: #ffffff;
}

/* ========================================
   Loading & Error States
   ======================================== */

.vc-collapsible-loader {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary, #6b7280);
}

.vc-collapsible-error {
    display: none;
    padding: 1rem;
    margin: 1rem 0;
}

.vc-collapsible-error p {
    margin: 0 0 0.5rem 0;
}

.vc-collapsible-retry {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: #ffffff;
    background: var(--primary-color, #3b82f6);
    border: none;
    border-radius: var(--border-radius, 6px);
    cursor: pointer;
    transition: background 0.2s ease;
}

.vc-collapsible-retry:hover {
    background: var(--primary-hover, #2563eb);
}

/* No-JS Fallback */
.vc-collapsible-nojs-fallback {
    display: block;
}

/* Hide fallback when JS is available and has initialized */
.vc-collapsible-js-enabled .vc-collapsible-nojs-fallback {
    display: none;
}

/* ========================================
   Accessibility & Reduced Motion
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .vc-collapsible-container,
    .vc-collapsible-summary,
    .vc-collapsible-toggle,
    .vc-collapsible-icon,
    .vc-collapsible-preview,
    .vc-collapsible-preview::after {
        transition: none;
    }
}

/* Focus visible for keyboard navigation */
.vc-collapsible-toggle:focus-visible {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: 2px;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .vc-collapsible-summary {
        padding: 1rem;
    }

    .vc-collapsible-summary .vc-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .vc-collapsible-toggle {
        align-self: flex-start;
        width: 100%;
        justify-content: center;
        /* Always visible on mobile */
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        display: none;
    }

    .vc-collapsible-details[open] .vc-collapsible-toggle {
        display: inline-flex;
    }

    .vc-collapsible-preview {
        padding: 1rem;
        padding-bottom: 3.5rem; /* Extra space for button on mobile */
    }

    .vc-collapsible-expand-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }

    .vc-collapsible-content {
        padding: 0 1rem;
    }

    .vc-collapsible-details[open] .vc-collapsible-content {
        padding: 1rem;
    }

    .vc-collapsible-content pre {
        font-size: 0.8125rem;
        padding: 0.75rem;
    }

    .vc-collapsible-copy-btn {
        top: 0.375rem;
        right: 0.375rem;
        padding: 0.25rem 0.5rem;
        font-size: 0.7rem;
    }
}

/* ========================================
   Utility Classes (Tailwind-compatible)
   ======================================== */

/* Animation for spinner */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.vc-animate-spin {
    animation: spin 1s linear infinite;
}