.gps-converter-ui {
    --gps-accent: #6366f1;
    --gps-accent-rgb: 99, 102, 241;
    --gps-accent-glow: rgba(99, 102, 241, 0.15);
    --gps-bg: #fff;
    --gps-bg-muted: #f8fafc;
    --gps-bg-surface: #f1f5f9;
    --gps-bg-overlay: #fff;
    --gps-text: #0f172a;
    --gps-text-muted: #475569;
    --gps-text-dim: #94a3b8;
    --gps-border: #e2e8f0;
    --gps-border-light: #f1f5f9;
    --gps-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.05);
    --gps-danger: #ef4444;
    --gps-radius-xl: 32px;
    --gps-radius-lg: 20px;
    --gps-radius-md: 12px;

    width: 100%;
    max-width: 1200px;
    margin: 2rem auto;
}

[data-theme="dark"] .gps-converter-ui,
.theme-dark .gps-converter-ui {
    --gps-bg: #0f172a;
    --gps-bg-muted: #1e293b;
    --gps-bg-surface: #1e293b;
    --gps-bg-overlay: #1e293b;
    --gps-text: #f8fafc;
    --gps-text-muted: #94a3b8;
    --gps-text-dim: #64748b;
    --gps-border: #334155;
    --gps-border-light: #1e293b;
    --gps-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.gps-converter-ui .tech-mega-card {
    background: var(--gps-bg);
    border: 1px solid var(--gps-border);
    border-radius: var(--gps-radius-xl);
    box-shadow: var(--gps-shadow);
    overflow: hidden;
    position: relative;
}

.gps-converter-ui .tech-mega-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #6366f1, #a855f7, #6366f1);
    background-size: 200% 100%;
    animation: gradient-shift-gps 3s linear infinite;
    z-index: 10;
}

@keyframes gradient-shift-gps {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.gps-converter-ui .card-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    min-height: 700px;
}

.gps-converter-ui .config-sidebar {
    padding: 2.5rem;
    background: var(--gps-bg-muted);
    border-right: 1px solid var(--gps-border);
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.gps-converter-ui .main-display {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.gps-converter-ui .tech-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.gps-converter-ui .row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.gps-converter-ui .section-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gps-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.gps-converter-ui .field-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gps-text-muted);
    margin-bottom: 0.5rem;
    display: block;
}

.gps-converter-ui .tech-input {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--gps-bg);
    border: 1px solid var(--gps-border);
    border-radius: var(--gps-radius-md);
    color: var(--gps-text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.gps-converter-ui .tech-input:focus {
    outline: none;
    border-color: var(--gps-accent);
    box-shadow: 0 0 0 4px var(--gps-accent-glow);
}

.gps-converter-ui .mode-switch {
    display: flex;
    background: var(--gps-bg-surface);
    padding: 0.25rem;
    border-radius: var(--gps-radius-md);
    flex: 1;
}

.gps-converter-ui .mode-btn {
    flex: 1;
    padding: 0.6rem;
    border-radius: calc(var(--gps-radius-md) - 4px);
    border: none;
    background: transparent;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gps-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gps-converter-ui .mode-btn.active {
    background: var(--gps-bg);
    color: var(--gps-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.gps-converter-ui .loc-btn {
    background: var(--gps-bg-surface);
    border: 1px solid var(--gps-border);
    color: var(--gps-text-muted);
    padding: 0.6rem;
    border-radius: var(--gps-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.gps-converter-ui .loc-btn:hover {
    color: var(--gps-accent);
    border-color: var(--gps-accent);
    background: var(--gps-bg);
}

.gps-converter-ui .compact-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.gps-converter-ui .gms-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gps-converter-ui .gms-group .compact-inputs {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.gps-converter-ui .results-area {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.gps-converter-ui .result-box {
    background: var(--gps-bg-muted);
    border: 1px solid var(--gps-border);
    border-radius: var(--gps-radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: all 0.2s ease;
}

.gps-converter-ui .result-box:hover {
    border-color: var(--gps-accent);
    background: var(--gps-bg);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.1);
}

.gps-converter-ui .res-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gps-converter-ui .res-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--gps-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gps-converter-ui .copy-btn {
    background: transparent;
    border: 1px solid var(--gps-border);
    color: var(--gps-text-muted);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.65rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
}

.gps-converter-ui .copy-btn:hover {
    background: var(--gps-accent);
    color: white;
    border-color: var(--gps-accent);
}

.gps-converter-ui .val-display {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gps-text);
    word-break: break-all;
}

.gps-converter-ui .map-container {
    height: 350px;
    border-radius: var(--gps-radius-lg);
    border: 1px solid var(--gps-border);
    overflow: hidden;
    z-index: 1;
}

.gps-converter-ui .header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gps-converter-ui .text-btn {
    background: transparent;
    border: none;
    color: var(--gps-text-dim);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s ease;
}

.gps-converter-ui .text-btn:hover {
    color: var(--gps-danger);
}

.gps-converter-ui .history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.gps-converter-ui .history-item {
    background: var(--gps-bg);
    border: 1px solid var(--gps-border);
    border-radius: var(--gps-radius-md);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.gps-converter-ui .history-item:hover {
    border-color: var(--gps-accent);
    transform: translateX(4px);
}

.gps-converter-ui .hist-coords {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gps-text);
}

.gps-converter-ui .hist-time {
    font-size: 0.65rem;
    color: var(--gps-text-dim);
}

.gps-converter-ui .hist-actions {
    display: flex;
    gap: 0.5rem;
}

.gps-converter-ui .action-btn {
    background: var(--gps-bg-surface);
    border: none;
    color: var(--gps-text-muted);
    padding: 0.4rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.gps-converter-ui .action-btn:hover {
    background: var(--gps-accent);
    color: white;
}

.gps-converter-ui .delete-btn:hover {
    background: var(--gps-danger);
}

.gps-converter-ui .no-history {
    padding: 2rem;
    text-align: center;
    color: var(--gps-text-dim);
    font-size: 0.85rem;
    border: 1px dashed var(--gps-border);
    border-radius: var(--gps-radius-md);
}

.gps-converter-ui .divider {
    height: 1px;
    background: var(--gps-border);
    opacity: 0.5;
}

@media (max-width: 1024px) {
    .gps-converter-ui .card-grid {
        grid-template-columns: 1fr;
    }
    .gps-converter-ui .config-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--gps-border);
    }
}

@media (max-width: 640px) {
    .gps-converter-ui .results-area {
        grid-template-columns: 1fr;
    }
    .gps-converter-ui .main-display, 
    .gps-converter-ui .config-sidebar {
        padding: 1.5rem;
    }
}