@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Lora:wght@400;500&family=Space+Mono:wght@400;700&display=swap');

:root {
    --navy: #0F1F3D;
    --navy-light: #1A2F55;
    --teal: #0D9488;
    --teal-light: #CCFBF1;
    --amber: #D97706;
    --bg: #F4F6FB;
    --bg2: #EEF1F9;
    --white: #FFFFFF;
    --text: #1E2A3A;
    --text2: #4A5568;
    --text3: #718096;
    --border: #D8DEE9;
    --serif: 'Playfair Display', Georgia, serif;
    --body: 'Lora', Georgia, serif;
    --mono: 'Space Mono', monospace;
}

.puc-wrapper {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    max-width: 720px;
    font-family: var(--body);
    margin: 0 auto;
    box-sizing: border-box;
}

.puc-header {
    padding: 24px 24px 0 24px;
}

.puc-label {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--teal);
    margin: 0 0 8px 0;
}

.puc-title {
    font-family: var(--serif);
    font-size: 28px;
    font-weight: 700;
    color: var(--navy);
    margin: 0 0 16px 0;
}

/* Tab bar */
.puc-tab-bar {
    background: var(--bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.puc-tab-bar::-webkit-scrollbar { display: none; }

.puc-cat-tab {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 16px;
    cursor: pointer;
    white-space: nowrap;
    color: var(--text3);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.puc-cat-tab:hover {
    color: var(--navy);
    background: var(--bg2);
}

.puc-cat-tab.puc-active {
    color: var(--navy);
    border-bottom: 2px solid var(--teal);
    background: var(--white);
}

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

/* Panel */
.puc-panel {
    padding: 24px;
}

/* Converter row */
.puc-converter-row {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    margin-bottom: 12px;
}

@media (max-width: 520px) {
    .puc-converter-row {
        flex-direction: column;
        align-items: stretch;
    }
    .puc-swap-btn {
        align-self: center;
        transform: rotate(90deg);
    }
}

.puc-field-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.puc-field-label {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text2);
}

.puc-num-input {
    font-family: var(--mono);
    font-size: 22px;
    font-weight: 700;
    color: var(--navy);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    background: var(--bg);
    width: 100%;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s;
    -moz-appearance: textfield;
}

.puc-num-input::-webkit-outer-spin-button,
.puc-num-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.puc-num-input:focus { border-color: var(--teal); }

.puc-num-output {
    background: var(--bg2);
}

.puc-unit-select {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: var(--mono);
    font-size: 12px;
    background: var(--white);
    color: var(--text);
    width: 100%;
    box-sizing: border-box;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.puc-unit-select:focus { border-color: var(--teal); }

.puc-swap-btn {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 18px;
    cursor: pointer;
    color: var(--teal);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
    align-self: center;
    margin-bottom: 36px;
}

.puc-swap-btn:hover {
    background: var(--teal);
    color: var(--white);
}

/* Factor note */
.puc-factor-note {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text3);
    background: var(--bg2);
    border-radius: 6px;
    padding: 8px 14px;
    margin-bottom: 16px;
    min-height: 34px;
}

/* Chips */
.puc-chips-label {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text3);
    margin-bottom: 8px;
}

.puc-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.puc-chip {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 12px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text2);
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    white-space: nowrap;
}

.puc-chip:hover {
    border-color: var(--teal);
    color: var(--teal);
}