@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Exo+2:wght@300;400;600;700&display=swap');

/* ==============================
   TP4056 CALCULATOR — STYLES
   ============================== */

.tp4056-wrap {
    --tp-bg:        #0d1117;
    --tp-surface:   #161b22;
    --tp-border:    #21262d;
    --tp-accent:    #f78166;
    --tp-green:     #3fb950;
    --tp-blue:      #58a6ff;
    --tp-yellow:    #e3b341;
    --tp-text:      #c9d1d9;
    --tp-muted:     #8b949e;
    --tp-mono:      'Share Tech Mono', monospace;
    --tp-body:      'Exo 2', sans-serif;
    --tp-radius:    8px;

    font-family: var(--tp-body);
    background: var(--tp-bg);
    border: 1px solid var(--tp-border);
    border-radius: 12px;
    overflow: hidden;
    max-width: 760px;
    margin: 2rem auto;
    color: var(--tp-text);
    box-shadow: 0 8px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

/* Header */
.tp4056-header {
    background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
    border-bottom: 1px solid var(--tp-border);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.tp4056-chip-icon {
    color: var(--tp-accent);
    width: 80px;
    flex-shrink: 0;
    opacity: 0.9;
    filter: drop-shadow(0 0 8px rgba(247,129,102,0.4));
}

.tp4056-title {
    font-family: var(--tp-mono);
    font-size: 1.25rem;
    color: #fff;
    margin: 0 0 4px !important;
    letter-spacing: 1px;
}

.tp4056-subtitle {
    font-size: 0.8rem;
    color: var(--tp-muted);
    margin: 0 !important;
}

.tp4056-subtitle sub {
    color: var(--tp-accent);
}

/* Body */
.tp4056-body {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

/* Input Section */
.tp4056-input-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 560px) {
    .tp4056-input-section { grid-template-columns: 1fr; }
    .tp4056-body { padding: 1.2rem; }
    .tp4056-header { padding: 1.2rem; }
}

.tp4056-field label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--tp-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 10px !important;
}

.tp4056-label-icon {
    font-size: 1rem;
}

.tp4056-input-row {
    display: flex;
    align-items: stretch;
    background: var(--tp-surface);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius);
    overflow: hidden;
    transition: border-color 0.2s;
}

.tp4056-input-row:focus-within {
    border-color: var(--tp-blue);
    box-shadow: 0 0 0 2px rgba(88,166,255,0.15);
}

.tp4056-input-row input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 0.7rem 1rem;
    font-family: var(--tp-mono);
    font-size: 1.1rem;
    color: #fff;
    width: 100%;
    box-sizing: border-box;
}

.tp4056-input-row input::placeholder {
    color: var(--tp-muted);
    font-size: 0.9rem;
}

.tp4056-unit {
    display: flex;
    align-items: center;
    padding: 0 0.8rem;
    font-family: var(--tp-mono);
    font-size: 0.75rem;
    color: var(--tp-muted);
    background: rgba(255,255,255,0.03);
    border-left: 1px solid var(--tp-border);
    white-space: nowrap;
}

/* Rate Buttons */
.tp4056-rate-buttons {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
}

.tp4056-rate-btn {
    flex: 1;
    background: var(--tp-surface);
    border: 1px solid var(--tp-border);
    border-radius: 6px;
    color: var(--tp-muted);
    font-family: var(--tp-mono);
    font-size: 0.75rem;
    padding: 8px 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.tp4056-rate-btn:hover {
    border-color: var(--tp-blue);
    color: var(--tp-blue);
    background: rgba(88,166,255,0.08);
}

.tp4056-rate-btn.active {
    background: rgba(88,166,255,0.15);
    border-color: var(--tp-blue);
    color: var(--tp-blue);
    font-weight: 700;
}

.tp4056-custom-rate-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tp4056-custom-label {
    font-size: 0.72rem;
    color: var(--tp-muted);
}

/* Results Grid */
.tp4056-results {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

@media (max-width: 640px) {
    .tp4056-results { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 380px) {
    .tp4056-results { grid-template-columns: 1fr; }
}

.tp4056-result-card {
    background: var(--tp-surface);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius);
    padding: 1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tp4056-result-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
}

.tp4056-card-current::before  { background: var(--tp-yellow); }
.tp4056-card-resistor::before { background: var(--tp-accent); }
.tp4056-card-standard::before { background: var(--tp-green); }
.tp4056-card-real-current::before { background: var(--tp-blue); }

.tp4056-card-icon {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.tp4056-card-label {
    font-size: 0.7rem;
    color: var(--tp-muted);
    margin-bottom: 8px;
    line-height: 1.3;
}

.tp4056-card-label sub {
    color: var(--tp-accent);
}

.tp4056-card-value {
    font-family: var(--tp-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
    margin-bottom: 4px;
    transition: color 0.3s;
}

.tp4056-card-value.tp4056-updated {
    animation: tp4056-flash 0.4s ease;
}

@keyframes tp4056-flash {
    0% { opacity: 0.3; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1); }
}

.tp4056-card-current  .tp4056-card-value { color: var(--tp-yellow); }
.tp4056-card-resistor .tp4056-card-value { color: var(--tp-accent); }
.tp4056-card-standard .tp4056-card-value { color: var(--tp-green); }
.tp4056-card-real-current .tp4056-card-value { color: var(--tp-blue); }

.tp4056-card-unit {
    font-size: 0.7rem;
    color: var(--tp-muted);
    font-family: var(--tp-mono);
}

/* Warning */
.tp4056-warning {
    background: rgba(227,179,65,0.1);
    border: 1px solid rgba(227,179,65,0.3);
    border-radius: var(--tp-radius);
    padding: 0.8rem 1rem;
    font-size: 0.85rem;
    color: var(--tp-yellow);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.tp4056-warning-icon {
    flex-shrink: 0;
}

/* Formula Box */
.tp4056-formula-box {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius);
    padding: 1.2rem 1.5rem;
}

.tp4056-formula-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--tp-muted);
    margin-bottom: 10px;
    font-weight: 700;
}

.tp4056-formula {
    font-family: var(--tp-mono);
    font-size: 1.05rem;
    color: var(--tp-green);
    margin-bottom: 10px;
}

.tp4056-formula sub {
    color: var(--tp-accent);
}

.tp4056-formula-note {
    font-size: 0.78rem;
    color: var(--tp-muted);
    line-height: 1.6;
}

.tp4056-formula-note strong {
    color: var(--tp-accent);
}

/* Table */
.tp4056-table-wrap {
    overflow-x: auto;
}

.tp4056-table-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--tp-muted);
    margin-bottom: 12px;
}

.tp4056-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    font-family: var(--tp-mono);
}

.tp4056-table th {
    background: rgba(255,255,255,0.04);
    color: var(--tp-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--tp-border);
}

.tp4056-table td {
    padding: 9px 14px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: var(--tp-text);
}

.tp4056-table tr:last-child td {
    border-bottom: none;
}

.tp4056-table tr:hover td {
    background: rgba(255,255,255,0.03);
}

.tp4056-table tr.tp4056-row-highlight td {
    background: rgba(88,166,255,0.1);
    color: var(--tp-blue);
}

.tp4056-table td:first-child {
    color: var(--tp-accent);
    font-weight: 700;
}

.tp4056-table td:nth-child(2) {
    color: var(--tp-yellow);
}