/* Base64 to Image Converter
-------------------------------------- */

.b2i-page {
    --b2i-accent: #06b6d4;
    --b2i-accent-dark: #0e7490;
    --b2i-accent-darker: #0c5e75;
    --b2i-accent-light: color-mix(in srgb, #06b6d4 10%, transparent);
    --b2i-good: #10b981;
    --b2i-good-light: color-mix(in srgb, #10b981 12%, transparent);
    --b2i-warn: #f59e0b;
    --b2i-warn-light: color-mix(in srgb, #f59e0b 12%, transparent);
    --b2i-danger: #dc2626;
    --b2i-danger-light: color-mix(in srgb, #dc2626 10%, transparent);
    --b2i-border: var(--flex-gray-15, rgba(0, 0, 0, 0.08));
    --b2i-border-strong: #e5e7eb;
    --b2i-surface: var(--solid-white, #fff);
    --b2i-soft: #f3f4f6;
    --b2i-radius: 16px;
    --b2i-radius-sm: 12px;
    --b2i-radius-xs: 10px;
    --b2i-shadow: 0 2px 4px rgba(0, 0, 0, 0.03), 0 6px 24px rgba(0, 0, 0, 0.07);
    --b2i-transition: 0.25s ease;
    position: relative;
    padding: 36px 0 80px;
}

/* Hero
-------------------------------------- */

.b2i-hero {
    max-width: 860px;
    margin: 0 auto;
    padding: 18px 0 28px;
    text-align: center;
}

.b2i-title {
    margin-bottom: 12px;
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.b2i-subtitle {
    max-width: 720px;
    margin: 0 auto;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    line-height: 1.65;
    color: var(--excerpt-color);
}

.b2i-subtitle code {
    padding: 1px 6px;
    font-size: 0.88em;
    background: var(--b2i-soft);
    border-radius: 4px;
}

.b2i-companion-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 14px;
    padding: 6px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--b2i-accent-dark);
    background: var(--b2i-accent-light);
    border-radius: 999px;
    text-decoration: none;
    transition: background var(--b2i-transition);
}

.b2i-companion-link:hover {
    background: color-mix(in srgb, var(--b2i-accent) 18%, transparent);
}

.b2i-companion-link svg {
    width: 14px;
    height: 14px;
}

/* Tool card
-------------------------------------- */

.b2i-tool-section {
    max-width: 940px;
    margin: 0 auto 28px;
}

.b2i-tool-card {
    border: 1px solid #ddd;
    border-radius: var(--b2i-radius);
    background: var(--b2i-surface);
    box-shadow: var(--b2i-shadow);
    padding: 36px 36px 32px;
}

/* Input
-------------------------------------- */

.b2i-input-wrap {
    margin-bottom: 14px;
}

.b2i-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--headline-fcolor, #111);
}

.b2i-textarea {
    width: 100%;
    min-height: 140px;
    padding: 14px 16px;
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--headline-fcolor, #111);
    background: var(--b2i-soft);
    border: 1px solid var(--b2i-border-strong);
    border-radius: var(--b2i-radius-sm);
    resize: vertical;
    transition: border-color var(--b2i-transition), box-shadow var(--b2i-transition);
    word-break: break-all;
}

.b2i-textarea::placeholder {
    color: #9ca3af;
}

.b2i-textarea:focus-visible {
    outline: none;
    border-color: var(--b2i-accent);
    box-shadow: 0 0 0 3px var(--b2i-accent-light);
}

.b2i-input-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
    justify-content: flex-end;
}

/* Status / error region
-------------------------------------- */

.b2i-status {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 16px 0;
    padding: 12px 14px;
    font-size: 0.9rem;
    border-radius: var(--b2i-radius-xs);
    background: var(--b2i-soft);
    color: var(--excerpt-color);
    transition: background var(--b2i-transition), color var(--b2i-transition);
}

.b2i-status[data-state="empty"] {
    background: var(--b2i-soft);
    color: var(--excerpt-color);
}

.b2i-status[data-state="ok"] {
    background: var(--b2i-good-light);
    color: var(--b2i-good);
}

.b2i-status[data-state="error"] {
    background: var(--b2i-danger-light);
    color: var(--b2i-danger);
}

.b2i-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
}

.b2i-status a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 2px;
    font-weight: 600;
}

/* Result panel
-------------------------------------- */

.b2i-result {
    display: grid;
    grid-template-columns: minmax(220px, 320px) 1fr;
    gap: 22px;
    align-items: start;
    padding: 22px;
    background: var(--b2i-soft);
    border-radius: var(--b2i-radius-sm);
    margin-top: 4px;
}

.b2i-preview-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
}

.b2i-preview-frame {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--b2i-radius-xs);
    background-color: #fff;
    background-image:
        linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
        linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
        linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border: 1px solid var(--b2i-border-strong);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.b2i-preview-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.b2i-meta-panel {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.b2i-meta-list {
    margin: 0;
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 8px 16px;
}

.b2i-meta-item {
    display: contents;
}

.b2i-meta-item dt {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--excerpt-color);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    align-self: center;
}

.b2i-meta-item dd {
    margin: 0;
    font-size: 0.92rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--headline-fcolor, #111);
    word-break: break-word;
}

/* Action buttons
-------------------------------------- */

.b2i-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.b2i-primary,
.b2i-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 11px 18px;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--b2i-radius-xs);
    cursor: pointer;
    transition: background var(--b2i-transition), border-color var(--b2i-transition), transform var(--b2i-transition), box-shadow var(--b2i-transition);
}

.b2i-primary svg,
.b2i-secondary svg {
    width: 14px;
    height: 14px;
}

.b2i-primary {
    color: #fff;
    background: var(--b2i-accent-dark);
    border: 1px solid var(--b2i-accent-dark);
}

.b2i-primary:hover {
    background: var(--b2i-accent-darker);
    border-color: var(--b2i-accent-darker);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 116, 144, 0.25);
}

.b2i-primary:focus-visible {
    outline: 2px solid var(--b2i-accent);
    outline-offset: 2px;
}

.b2i-primary[data-state="copied"] {
    background: var(--b2i-good);
    border-color: var(--b2i-good);
}

.b2i-secondary {
    color: var(--headline-fcolor, #111);
    background: #fff;
    border: 1px solid var(--b2i-border-strong);
}

.b2i-secondary:hover {
    background: var(--b2i-soft);
    border-color: #d1d5db;
}

.b2i-secondary:focus-visible {
    outline: 2px solid var(--b2i-accent);
    outline-offset: 2px;
}

.b2i-secondary[data-state="copied"] {
    background: var(--b2i-good-light);
    border-color: var(--b2i-good);
    color: var(--b2i-good);
}

/* Toast
-------------------------------------- */

.b2i-toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.b2i-toast {
    padding: 10px 16px;
    font-size: 0.88rem;
    color: #fff;
    background: var(--b2i-accent-dark);
    border-radius: var(--b2i-radius-xs);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    animation: b2iToastIn 0.25s ease;
}

@keyframes b2iToastIn {
    from { transform: translateY(8px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Sections below the tool card — separator pattern (no max-width on inner)
-------------------------------------- */

.b2i-seo-content,
.b2i-faq {
    margin-top: 54px;
    padding-top: 36px;
    border-top: 1px solid var(--b2i-border);
}

/* FAQ — flat inner per design rule
-------------------------------------- */

.b2i-faq-inner {
    padding: 0;
}

.b2i-faq-label {
    display: inline-block;
    margin-bottom: 8px;
    padding: 4px 12px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--b2i-accent-dark);
    background: var(--b2i-accent-light);
    border-radius: 999px;
}

.b2i-faq-title {
    margin: 0 0 22px;
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.b2i-faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.b2i-faq-item {
    border: 1px solid var(--b2i-border);
    border-radius: var(--b2i-radius-sm);
    background: var(--b2i-surface);
    overflow: hidden;
    transition: border-color var(--b2i-transition), box-shadow var(--b2i-transition);
}

.b2i-faq-item:hover {
    border-color: color-mix(in srgb, var(--b2i-accent) 40%, var(--b2i-border-strong));
}

.b2i-faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 16px 18px;
    background: transparent;
    border: 0;
    cursor: pointer;
    text-align: left;
    font-size: 0.96rem;
    font-weight: 600;
    color: var(--headline-fcolor, #111);
    transition: background var(--b2i-transition);
}

.b2i-faq-question:hover {
    background: var(--b2i-soft);
}

.b2i-faq-question:focus-visible {
    outline: 2px solid var(--b2i-accent);
    outline-offset: -2px;
}

.b2i-faq-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    color: var(--excerpt-color);
    transition: transform var(--b2i-transition), color var(--b2i-transition);
    flex-shrink: 0;
}

.b2i-faq-question[aria-expanded="true"] .b2i-faq-toggle {
    transform: rotate(180deg);
    color: var(--b2i-accent);
}

.b2i-faq-toggle svg {
    width: 16px;
    height: 16px;
}

.b2i-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--b2i-transition);
}

.b2i-faq-answer-inner {
    padding: 0 18px 16px;
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--excerpt-color);
}

.b2i-faq-answer-inner p {
    margin: 0;
}

/* Responsive
-------------------------------------- */

@media (max-width: 767px) {
    .b2i-tool-card {
        padding: 22px 18px 20px;
    }

    .b2i-result {
        grid-template-columns: 1fr;
        gap: 18px;
        padding: 16px;
    }

    .b2i-preview-frame {
        max-width: 280px;
        margin: 0 auto;
    }

    .b2i-input-actions {
        justify-content: stretch;
    }

    .b2i-input-actions button {
        flex: 1 1 calc(50% - 4px);
        justify-content: center;
    }

    /* Mobile must NOT re-introduce padding on .faq-inner */
    .b2i-faq-inner {
        padding: 0;
    }

    .b2i-seo-content,
    .b2i-faq {
        margin-top: 42px;
        padding-top: 28px;
    }
}