/*!
 * EasifyMe Unit Converter
 * CSS Prefix: uc-
 */

/* ============================================================
   LAYOUT
   ============================================================ */
.uc-tool { font-family: inherit; }

/* ============================================================
   SMART SEARCH
   ============================================================ */
.uc-search-wrap {
    position: relative;
    margin-bottom: var(--space-4);
}

.uc-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    pointer-events: none;
    z-index: 1;
}

.uc-search-input {
    width: 100%;
    padding: 12px 16px 12px 40px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: var(--text-base);
    font-weight: 500;
    transition: var(--transition-base);
}

.uc-search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.uc-search-input::placeholder { color: var(--color-text-muted); font-weight: 400; }

.uc-search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0; right: 0;
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.uc-search-results.active { display: block; }

.uc-search-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    cursor: pointer;
    transition: background 0.15s;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-sm);
}

.uc-search-item:last-child { border-bottom: none; }
.uc-search-item:hover, .uc-search-item.active { background: rgba(59,130,246,0.06); }
.uc-search-item .uc-sr-cat { color: var(--color-text-muted); font-size: 12px; margin-left: auto; }

/* ============================================================
   FAVORITES BAR
   ============================================================ */
.uc-favorites-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: var(--space-4);
    min-height: 0;
}

.uc-fav-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border: 1.5px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.uc-fav-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.uc-fav-btn .uc-fav-remove {
    font-size: 10px;
    margin-left: 2px;
    opacity: 0.5;
}

.uc-fav-btn .uc-fav-remove:hover { opacity: 1; color: #EF4444; }

/* ============================================================
   CATEGORY TABS
   ============================================================ */
.uc-cat-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: var(--space-5);
    background: var(--color-bg-secondary);
    padding: 6px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.uc-cat-btn {
    padding: 7px 12px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 5px;
}

.uc-cat-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.uc-cat-btn.active {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}

.uc-cat-btn .uc-cat-icon { font-size: 14px; }

/* ============================================================
   MAIN CONVERTER
   ============================================================ */
.uc-converter-card {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
}

.uc-conv-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.uc-conv-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.uc-conv-field label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
}

.uc-conv-input-wrap {
    display: flex;
    gap: 8px;
}

.uc-conv-input {
    flex: 1;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: 20px;
    font-weight: 700;
    transition: var(--transition-base);
    min-width: 0;
}

.uc-conv-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.uc-conv-input::-webkit-outer-spin-button,
.uc-conv-input::-webkit-inner-spin-button { -webkit-appearance: none; }

.uc-conv-select {
    width: 200px;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.uc-conv-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Swap button */
.uc-swap-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
}

.uc-swap-btn {
    width: 40px; height: 40px;
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    flex-shrink: 0;
}

.uc-swap-btn:hover {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
    transform: rotate(180deg);
}

/* Action buttons row */
.uc-conv-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: var(--space-3);
}

.uc-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border: 1.5px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.uc-action-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.uc-action-btn.uc-fav-active { color: #F59E0B; border-color: #F59E0B; }

/* ============================================================
   CONVERT ALL TABLE
   ============================================================ */
.uc-all-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
}

.uc-all-title {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.uc-all-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.uc-all-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    transition: var(--transition-base);
    gap: 10px;
}

.uc-all-item:hover {
    border-color: var(--color-accent);
    background: rgba(59,130,246,0.03);
}

.uc-all-item.uc-all-highlight {
    border-color: var(--color-accent);
    background: rgba(59,130,246,0.06);
}

.uc-all-item-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
    flex: 1;
}

.uc-all-item-name {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.uc-all-item-val {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text);
    word-break: break-all;
    font-family: var(--font-heading);
}

.uc-all-item-val .uc-symbol { font-weight: 500; color: var(--color-text-muted); margin-left: 4px; }

.uc-all-copy-btn {
    border: none;
    background: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    font-size: 12px;
    flex-shrink: 0;
    transition: color 0.15s;
}

.uc-all-copy-btn:hover { color: var(--color-accent); }

.uc-all-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--space-3);
}

/* ============================================================
   FEATURE PANELS (Visual, References, Formula, Batch)
   ============================================================ */
.uc-feature-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.uc-feat-btn {
    padding: 6px 14px;
    border: 1.5px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.uc-feat-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.uc-feat-btn.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

.uc-feat-panel { display: none; }
.uc-feat-panel.active { display: block; }

/* Visual comparison */
.uc-visual-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.uc-visual-bars { margin-top: var(--space-3); }

.uc-vis-row {
    margin-bottom: var(--space-3);
}

.uc-vis-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.uc-vis-bar-track {
    height: 28px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.uc-vis-bar-fill {
    height: 100%;
    border-radius: var(--radius-md);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    padding-left: 10px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    min-width: 0;
}

.uc-vis-bar-from { background: linear-gradient(90deg, var(--color-accent), #3B82F6); }
.uc-vis-bar-to { background: linear-gradient(90deg, #10B981, #059669); }

.uc-vis-summary {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-3);
    text-align: center;
    font-weight: 500;
}

/* Real-world references */
.uc-refs-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.uc-ref-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-sm);
    color: var(--color-text);
}

.uc-ref-item:last-child { border-bottom: none; }
.uc-ref-icon { font-size: 18px; flex-shrink: 0; }

/* Formula */
.uc-formula-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.uc-formula-box {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: 'Courier New', monospace;
    font-size: var(--text-sm);
    color: var(--color-text);
    margin-bottom: var(--space-3);
}

.uc-formula-example {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.uc-formula-example strong { color: var(--color-text); }

/* Batch */
.uc-batch-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.uc-batch-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-3);
}

.uc-batch-input:focus { outline: none; border-color: var(--color-accent); }
.uc-batch-input::placeholder { color: var(--color-text-muted); }

.uc-batch-results {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.uc-batch-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 14px;
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--color-border);
}

.uc-batch-row:last-child { border-bottom: none; }
.uc-batch-row:nth-child(even) { background: var(--color-bg-secondary); }
.uc-batch-from { color: var(--color-text-muted); font-weight: 500; }
.uc-batch-to { color: var(--color-text); font-weight: 700; }

/* ============================================================
   QUICK REFERENCE CARD
   ============================================================ */
.uc-quickref {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
    overflow: hidden;
}

.uc-quickref-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    cursor: pointer;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-text);
    transition: background 0.15s;
}

.uc-quickref-header:hover { background: rgba(59,130,246,0.03); }

.uc-quickref-header .uc-qr-toggle {
    font-size: 12px;
    color: var(--color-text-muted);
    transition: transform 0.3s;
}

.uc-quickref-header.open .uc-qr-toggle { transform: rotate(180deg); }

.uc-quickref-body {
    display: none;
    padding: 0 16px 16px;
}

.uc-quickref-body.open { display: block; }

.uc-qr-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 6px;
}

.uc-qr-item {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text);
    padding: 6px 10px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

/* ============================================================
   RECENT CONVERSIONS
   ============================================================ */
.uc-recent-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: var(--space-3);
    min-height: 0;
}

.uc-recent-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 0;
}

.uc-recent-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.uc-recent-chip:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ============================================================
   NUMBER SYSTEM SPECIAL
   ============================================================ */
.uc-num-all {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: var(--space-3);
}

.uc-num-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.uc-num-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    width: 50px;
    flex-shrink: 0;
}

.uc-num-val {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    flex: 1;
}

/* ============================================================
   BIGHA STATE SELECTOR
   ============================================================ */
.uc-bigha-note {
    background: rgba(245,158,11,0.08);
    border: 1px solid rgba(245,158,11,0.3);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-top: var(--space-3);
    font-size: 12px;
    color: var(--color-text);
    display: none;
}

.uc-bigha-note.active { display: block; }

.uc-bigha-note strong { color: #F59E0B; }

/* ============================================================
   TOAST / COPY FEEDBACK
   ============================================================ */
.uc-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: #1E293B;
    color: #fff;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
}

.uc-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .uc-conv-row { flex-direction: column; }
    .uc-conv-input-wrap { flex-direction: column; }
    .uc-conv-select { width: 100%; }
    .uc-conv-input { font-size: 18px; }
    .uc-swap-wrap { transform: rotate(90deg); }
    .uc-all-grid { grid-template-columns: 1fr; }
    .uc-qr-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .uc-cat-tabs { gap: 2px; padding: 4px; }
    .uc-cat-btn { font-size: 11px; padding: 5px 8px; gap: 3px; }
    .uc-cat-btn .uc-cat-icon { font-size: 12px; }
    .uc-qr-grid { grid-template-columns: 1fr; }
}