#hc-tekne-hizi-hesaplayici {
    background: #ffffff;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    font-family: 'Inter', sans-serif;
    max-width: 550px;
    margin: 20px auto;
    border: 1px solid #e2e8f0;
}

#hc-tekne-hizi-hesaplayici .hc-header h3 {
    text-align: center;
    color: #1e3a8a;
    font-size: 1.5rem;
    font-weight: 800;
}

#hc-tekne-hizi-hesaplayici .hc-header p {
    text-align: center;
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 25px;
}

#hc-tekne-hizi-hesaplayici .hc-tabs {
    display: flex;
    background: #f1f5f9;
    padding: 5px;
    border-radius: 12px;
    margin-bottom: 25px;
}

#hc-tekne-hizi-hesaplayici .hc-tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    color: #64748b;
}

#hc-tekne-hizi-hesaplayici .hc-tab-btn.active {
    background: white;
    color: #1e3a8a;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

#hc-tekne-hizi-hesaplayici .hc-tab-content {
    display: none;
}

#hc-tekne-hizi-hesaplayici .hc-tab-content.active {
    display: block;
}

#hc-tekne-hizi-hesaplayici label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: #334155;
    margin-bottom: 8px;
}

#hc-tekne-hizi-hesaplayici .hc-dual-input {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

#hc-tekne-hizi-hesaplayici input,
#hc-tekne-hizi-hesaplayici select {
    width: 100%;
    padding: 12px;
    border: 2px solid #f1f5f9;
    border-radius: 10px;
    background: #f8fafc;
}

#hc-tekne-hizi-hesaplayici .hc-btn {
    width: 100%;
    background: #1e40af;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
}

#hc-tekne-hizi-hesaplayici .hc-result {
    margin-top: 30px;
    padding: 25px;
    background: #eff6ff;
    border-radius: 18px;
    display: none;
}

#hc-tekne-hizi-hesaplayici .hc-result.visible {
    display: block;
    animation: slideUp 0.5s ease;
}

#hc-tekne-hizi-hesaplayici .hc-boat-res-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

#hc-tekne-hizi-hesaplayici .hc-boat-card {
    background: white;
    padding: 15px;
    border-radius: 12px;
    text-align: center;
}

#hc-tekne-hizi-hesaplayici .hc-boat-card strong {
    display: block;
    font-size: 1.5rem;
    color: #1e3a8a;
    font-weight: 900;
}

#hc-tekne-hizi-hesaplayici .hc-boat-card span {
    font-size: 0.75rem;
    color: #64748b;
    font-weight: 600;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}