/* ══════════════════════════════════════════════
   Base64 Converter — Custom Overrides & UI
   ══════════════════════════════════════════════ */

/* ─── Mode Capsule (Encode/Decode) ─── */
.mode-capsule-selector {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.mode-capsule {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 6px;
    gap: 6px;
    box-shadow: var(--shadow-sm);
}

.mode-btn {
    border: none;
    background: transparent;
    padding: 10px 24px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
}

.mode-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.mode-btn i {
    font-size: 0.8rem;
}

/* ─── Layout Compression ─── */
.tool-hero {
    padding: 1.5rem 0 !important;
    border-bottom: 1px solid var(--border);
}

.tool-hero-inner {
    gap: 1rem !important;
}

.tool-page-icon {
    font-size: 2.2rem !important;
}

.tool-hero-text h1 {
    font-size: 1.8rem !important;
    margin-bottom: 2px !important;
}

.tool-hero-text p {
    font-size: 0.85rem !important;
    opacity: 0.8;
}

.tool-workspace {
    padding-top: 1.5rem !important;
    padding-bottom: 2rem !important;
}

/* ─── Config Card ─── */
.config-card {
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.config-item.wide {
    grid-column: span 3;
}

.config-item label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    display: block;
}

.form-control {
    height: 38px;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    background: var(--surface-2);
    border: 1.5px solid var(--border);
    color: var(--text);
    padding: 0 12px;
    transition: all var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
}

/* ─── Symmetrical Editor Panel ─── */
.editor-panel {
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.panel-flex-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.source-toggle {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 2px;
}

.source-btn {
    border: none;
    background: transparent;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.source-btn.active {
    background: var(--surface-1);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.source-btn i {
    font-size: 0.7rem;
}

/* ─── Type Tabs ─── */
.type-tabs {
    display: flex;
    gap: var(--space-sm);
}

.type-tab {
    background: transparent;
    border: none;
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* ─── File Upload Area ─── */
.file-dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-1);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.file-dropzone:hover {
    border-color: var(--accent);
    background: rgba(var(--accent-rgb), 0.02);
}

.dropzone-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.file-hidden-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* ─── Options Switches ─── */
.switch-row {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    height: 38px;
}

.switch-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}

/* ─── Breakdown Section ─── */
.breakdown-banner {
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.breakdown-banner-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.breakdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.breakdown-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

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

.breakdown-item .label {
    color: var(--text-muted);
}

.breakdown-item .value {
    font-weight: 600;
    font-family: var(--font-mono);
}

.breakdown-item .value.success {
    color: var(--success);
}

.breakdown-item .value.danger {
    color: var(--danger);
}

.breakdown-item .value.accent {
    color: var(--accent);
}

/* ─── Responsive Adjustments ─── */
@media (max-width: 768px) {
    .config-grid {
        grid-template-columns: 1fr;
    }
    
    .panel-flex-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: var(--space-md);
    }
    
    .breakdown-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}