/* ============================================================
   Converter Tools Plugin v3.0 — Premium Dark Design
   Lime-green #AAEE00 brand, large inputs, unit badges
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

.ct-wrap {
    --g:        #AAEE00;
    --g-bright: #C8FF00;
    --g-dim:    rgba(170,238,0,0.15);
    --g-glow:   rgba(170,238,0,0.25);
    --bg:       #141414;
    --card:     #1c1c1c;
    --field:    #242424;
    --field-hv: #2a2a2a;
    --border:   #2e2e2e;
    --border-active: #404040;
    --text:     #f4f4f4;
    --muted:    #666;
    --subtle:   #3a3a3a;
    --radius:   16px;
    --r-sm:     10px;
    --font:     'Inter', 'Segoe UI', Arial, sans-serif;

    font-family:   var(--font);
    background:    var(--card);
    border:        1.5px solid var(--border);
    border-radius: var(--radius);
    padding:       0;
    max-width:     460px;
    margin:        28px auto;
    color:         var(--text);
    overflow:      hidden;
    box-shadow:    0 2px 4px rgba(0,0,0,0.4), 0 20px 60px rgba(0,0,0,0.5);
    transition:    box-shadow 0.3s;
}

.ct-wrap:hover {
    box-shadow: 0 2px 4px rgba(0,0,0,0.4), 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px var(--border-active);
}

/* ── Top bar ── */
.ct-topbar {
    background:     linear-gradient(135deg, #1f1f1f 0%, #191919 100%);
    border-bottom:  1.5px solid var(--border);
    padding:        18px 22px 16px;
    display:        flex;
    align-items:    center;
    justify-content: space-between;
    gap:            12px;
}

.ct-topbar-left {}

.ct-title {
    font-size:   1.05rem;
    font-weight: 800;
    color:       var(--text);
    margin:      0 0 3px;
    letter-spacing: -0.01em;
    line-height: 1;
}

.ct-direction {
    font-size:      0.72rem;
    font-weight:    600;
    color:          var(--g);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display:        flex;
    align-items:    center;
    gap:            5px;
}

.ct-direction-arrow {
    font-size: 0.8rem;
    opacity:   0.7;
}

/* ── Body ── */
.ct-body {
    padding: 20px 20px 18px;
}

/* ── Field ── */
.ct-field-wrap {
    position:      relative;
    background:    var(--field);
    border:        1.5px solid var(--border);
    border-radius: var(--r-sm);
    transition:    border-color 0.2s, background 0.2s, box-shadow 0.2s;
    overflow:      hidden;
}

.ct-field-wrap:focus-within {
    border-color: var(--g);
    background:   var(--field-hv);
    box-shadow:   0 0 0 3px var(--g-dim), inset 0 1px 0 rgba(255,255,255,0.03);
}

.ct-field-wrap.ct-result-glow {
    border-color: var(--g);
    box-shadow:   0 0 0 3px var(--g-dim);
    animation:    ct-result-pulse 0.4s ease;
}

@keyframes ct-result-pulse {
    0%   { box-shadow: 0 0 0 0px var(--g-glow); }
    50%  { box-shadow: 0 0 0 6px var(--g-dim); }
    100% { box-shadow: 0 0 0 3px var(--g-dim); }
}

.ct-field-inner {
    display:     flex;
    align-items: stretch;
}

.ct-field-text {
    flex:    1;
    padding: 14px 0 12px 16px;
    min-width: 0;
}

.ct-field-label {
    font-size:      0.68rem;
    font-weight:    700;
    color:          var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom:  6px;
    line-height:    1;
    display:        block;
}

.ct-field-wrap:focus-within .ct-field-label {
    color: var(--g);
}

.ct-field-input {
    background:  transparent;
    border:      none;
    outline:     none;
    color:       var(--text);
    font-family: var(--font);
    font-size:   2rem;
    font-weight: 800;
    width:       100%;
    padding:     0;
    line-height: 1.1;
    letter-spacing: -0.03em;
    -moz-appearance: textfield;
}

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

.ct-field-input::placeholder {
    color:       #333;
    font-weight: 700;
}

/* ── Unit badge ── */
.ct-unit-badge {
    display:        flex;
    align-items:    center;
    justify-content: center;
    padding:        0 18px;
    border-left:    1.5px solid var(--border);
    background:     rgba(255,255,255,0.02);
    min-width:      64px;
    flex-shrink:    0;
}

.ct-unit-badge span {
    font-size:   1.1rem;
    font-weight: 800;
    color:       var(--muted);
    letter-spacing: -0.01em;
    transition:  color 0.2s;
    white-space: nowrap;
}

.ct-field-wrap:focus-within .ct-unit-badge span {
    color: var(--g);
}

/* ── Switch row ── */
.ct-switch-row {
    display:         flex;
    align-items:     center;
    justify-content: center;
    padding:         14px 0;
    gap:             14px;
    position:        relative;
}

.ct-divider-line {
    flex:       1;
    height:     1px;
    background: linear-gradient(90deg, transparent, var(--border) 30%, var(--border) 70%, transparent);
}

.ct-switch-btn {
    position:        relative;
    width:           46px;
    height:          46px;
    border-radius:   50%;
    border:          1.5px solid var(--subtle);
    background:      var(--field);
    color:           var(--muted);
    font-size:       1.2rem;
    cursor:          pointer;
    display:         flex;
    align-items:     center;
    justify-content: center;
    transition:      all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    outline:         none;
    flex-shrink:     0;
    line-height:     1;
}

.ct-switch-btn:hover {
    border-color: var(--g);
    background:   var(--g-dim);
    color:        var(--g);
    transform:    scale(1.08);
    box-shadow:   0 0 20px var(--g-glow);
}

.ct-switch-btn:active {
    transform: scale(0.95);
}

.ct-switch-btn.ct-spinning .ct-switch-icon {
    animation: ct-spin-icon 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ct-switch-icon {
    display:    inline-block;
    transition: transform 0.2s;
    font-style: normal;
    line-height: 1;
}

@keyframes ct-spin-icon {
    0%   { transform: rotate(0deg) scale(1); }
    40%  { transform: rotate(100deg) scale(1.2); }
    100% { transform: rotate(180deg) scale(1); }
}

/* ── Formula bar ── */
.ct-formula-bar {
    margin:        0 20px 18px;
    background:    var(--field);
    border:        1px solid var(--border);
    border-radius: var(--r-sm);
    padding:       10px 14px;
    display:       flex;
    align-items:   center;
    gap:           8px;
}

.ct-formula-icon {
    font-size:  0.85rem;
    color:      var(--g);
    opacity:    0.8;
    flex-shrink: 0;
}

.ct-formula-text {
    font-size:      0.75rem;
    font-weight:    600;
    color:          var(--muted);
    letter-spacing: 0.02em;
    font-family:    'Courier New', monospace;
}

/* ── Field flash animation on switch ── */
.ct-field-wrap.ct-flash {
    animation: ct-flash 0.35s ease;
}

@keyframes ct-flash {
    0%   { opacity: 0.5; transform: translateY(4px); }
    100% { opacity: 1;   transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 480px) {
    .ct-wrap { margin: 16px 12px; }
    .ct-field-input { font-size: 1.6rem; }
    .ct-unit-badge { min-width: 50px; padding: 0 12px; }
    .ct-unit-badge span { font-size: 0.9rem; }
}