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

:root {
    --primary-bg: #f4f5f7; 
    --secondary-bg: #ffffff; 
    --text-color: #333;
    --accent-color: #4a90e2; 
    --danger-color: #e24a4a; 
    --success-color: #50e3c2;
    --border-color: #e0e0e0; 
    --warning-color: #f5a623; 
    --card-color: #3a7ac2;
    --recalc-color: #9b59b6; 
    --cancel-color: #7f8c8d; 
    --return-alt-color: #c0392b;
    --final-total-color: #27ae60; 
    --split-color: #e67e22; 
    --exchange-color: #3498db;
    --usd-green: #85bb65; /* USD Dollar Bill yeşili */
    --stock-color: #e74c3c; /* Stok sayısı için kırmızı renk */
}

.cash-button {
    background-color: var(--usd-green) !important;
    color: #2d4a22 !important;
    font-family: 'Courier New', monospace !important;
    font-weight: bold !important;
    border: 1px solid #6b9b47 !important;
    text-shadow: 0 1px 0 rgba(255,255,255,0.3);
}

.cash-button:hover {
    background-color: #7ba858 !important;
}

body {
    font-family: 'Nunito', sans-serif; 
    background-color: var(--primary-bg);
    color: var(--text-color); 
    margin: 0; 
    padding: 20px; 
    overscroll-behavior: none;
}

.container { 
    display: flex; 
    flex-direction: column; 
    gap: 20px; 
    max-width: 1200px; 
    margin: auto; 
}

.top-row { 
    display: flex; 
    gap: 20px; 
    width: 100%; 
}

.cart, .controls, .daily-log, .stats-panel, .products-panel {
    background-color: var(--secondary-bg); 
    padding: 20px; 
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05); 
    width: 100%; 
    box-sizing: border-box;
}

.cart { 
    flex: 1; 
}

.controls { 
    flex: 1; 
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-left: auto;
}

.category-btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.95em;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--accent-color);
    background-color: #f0f7ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(74, 144, 226, 0.2);
}

.category-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.category-btn.active:hover {
    background-color: #3a7ac2;
    border-color: #3a7ac2;
}

.products-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); 
    gap: 15px; 
    max-height: 60vh; 
    overflow-y: auto; 
}

.product-card { 
    border: 1px solid var(--border-color); 
    border-radius: 10px; 
    padding: 10px; 
    text-align: center; 
    cursor: pointer; 
    transition: transform 0.2s ease, box-shadow 0.2s ease; 
}

.product-card:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 8px 16px rgba(0,0,0,0.1); 
}

.product-card img { 
    width: 100%; 
    height: 110px; 
    object-fit: contain; 
    background-color: #fafafa; 
    border-radius: 6px; 
}

.product-card .name { 
    font-weight: 600; 
    margin-top: 10px; 
    font-size: 0.9em; 
    height: 35px; 
    overflow: hidden; 
}

.product-card .stock-info {
    color: var(--stock-color);
    font-weight: 700;
}

.product-card .product-name {
    color: var(--text-color);
}

.product-card .price { 
    color: var(--accent-color); 
    font-weight: 700; 
    font-size: 1.1em; 
}

h2 { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-top: 0; 
    border-bottom: 2px solid var(--primary-bg); 
    padding-bottom: 10px; 
    font-size: 1.4em; 
    gap: 20px;
}

h2 span {
    flex-shrink: 0;
}

h2 .date-span { 
    font-size: 0.8em; 
    font-weight: 400; 
    color: #888; 
}

.cart h2 {
    position: relative;
}

.cart-cancel-btn {
    background-color: var(--cancel-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.8em;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.cart-cancel-btn:hover {
    background-color: #6c7b7d;
}

#cart-items { 
    list-style: none; 
    padding: 0; 
    margin: 0; 
    min-height: 180px; 
    max-height: 180px; 
    overflow-y: auto; 
}

#cart-items li { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 10px 5px; 
    border-bottom: 1px solid var(--border-color); 
}

.remove-item { 
    background-color: var(--danger-color); 
    color: white; 
    border: none; 
    border-radius: 50%; 
    width: 20px; 
    height: 20px; 
    cursor: pointer; 
    font-weight: bold; 
    line-height: 20px; 
    text-align: center; 
}

.totals { 
    margin-top: 20px; 
    font-size: 1.1em; 
}

.totals div { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 6px 0; 
}

.totals .irrelevant span { 
    color: #ccc !important; 
    text-decoration: line-through; 
}

#manual-price-input { 
    width: 100px; 
    text-align: right; 
    padding: 5px; 
    border-radius: 4px; 
    border: 1px solid var(--border-color); 
    font-size: 1em; 
}

.totals #final-total-row strong { 
    font-size: 1.8em; 
    font-weight: 700; 
    color: var(--final-total-color); 
}

.controls .button-row { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 10px; 
    margin-bottom: 10px;
}

.controls .button-row:last-child { 
    margin-bottom: 0; 
}

.controls .button-row.full-width { 
    grid-template-columns: 1fr; 
}

.controls .edit-buttons { 
    margin-top: 10px; 
}

.btn { 
    padding: 15px; 
    border-radius: 8px; 
    border: none; 
    font-size: 1.1em; 
    font-weight: 700; 
    cursor: pointer; 
    transition: background-color 0.2s ease; 
}

.btn-recalculate { 
    background-color: var(--recalc-color); 
    color: white; 
}

.btn-return { 
    background-color: var(--danger-color); 
    color: white; 
}

.btn-return-cash, .btn-return-card { 
    background-color: var(--return-alt-color); 
    color: white; 
}

.btn-delete-sale { 
    background-color: var(--danger-color); 
    color: white; 
}

.btn-cancel-edit { 
    background-color: var(--cancel-color); 
    color: white; 
}

.btn-split { 
    background-color: var(--split-color); 
    color: white; 
}

.btn-exchange { 
    background-color: var(--exchange-color); 
    color: white; 
}

.btn-clear-cart { 
    background-color: var(--cancel-color); 
    color: white; 
}

#split-payment-container { 
    margin-top: 15px; 
    padding: 15px; 
    border: 1px dashed var(--split-color); 
    border-radius: 8px; 
    display: none; 
}

#split-payment-container label { 
    font-weight: 600; 
    margin-right: 10px; 
}

#split-cash-input { 
    padding: 8px; 
    border-radius: 4px; 
    border: 1px solid var(--border-color); 
    width: 100px; 
    text-align: right; 
}

#split-remaining-info { 
    margin-top: 10px; 
    font-size: 0.9em; 
    text-align: right; 
}

#split-remaining-info strong { 
    color: var(--card-color); 
    font-size: 1.1em; 
}

#log-entries { 
    list-style-type: none; 
    padding: 0; 
    margin: 0; 
    max-height: 250px; 
    overflow-y: auto; 
}

.log-entry { 
    border: 1px solid var(--border-color); 
    border-radius: 8px; 
    padding: 15px; 
    margin-bottom: 10px; 
    cursor: pointer; 
    transition: background-color 0.2s; 
}

.log-entry:hover { 
    background-color: var(--primary-bg); 
}

.log-entry.editing { 
    border: 2px solid var(--accent-color); 
    background-color: #e9f2fd; 
}

.log-entry.return .header span:last-child { 
    color: var(--danger-color); 
}

.log-entry.exchange .header span:last-child { 
    color: var(--exchange-color); 
}

.log-entry .header { 
    display: flex; 
    justify-content: space-between; 
    font-weight: bold; 
}

.log-entry .details { 
    font-size: 0.9em; 
    color: #666; 
    margin-top: 8px; 
}

.stats-panel .stat-item { 
    display: flex; 
    flex-direction: column; 
    padding: 8px 0; 
    border-bottom: 1px solid var(--primary-bg); 
}

.stats-panel .stat-item:last-child { 
    border-bottom: none; 
}

.stat-item .stat-title { 
    display: flex; 
    justify-content: space-between; 
    font-weight: 600; 
    margin-bottom: 5px; 
}

.stat-item .stat-title span:last-child { 
    color: var(--accent-color); 
    font-weight: 700; 
}

.stat-item .stat-breakdown { 
    font-size: 0.9em; 
    color: #555; 
    text-align: right; 
}

.category-header { 
    font-size: 1em; 
    font-weight: 700; 
    margin-top: 10px; 
    color: #444; 
}

.return-category { 
    color: var(--danger-color) !important; 
}

/* Konteyner için temel stil */
.date-picker-container {
    display: inline-block;
    position: relative; /* Mobil için gerekli */
    cursor: pointer;
}

/* Görünen tarih metni için stil */
.date-picker-container .date-span {
    text-decoration: underline;
    text-decoration-style: dashed;
    text-decoration-color: rgba(0, 0, 0, 0.4);
    transition: color 0.2s ease-in-out, text-decoration-color 0.2s ease-in-out;
}

.date-picker-container:hover .date-span {
    color: var(--accent-color, #0d6efd); 
    text-decoration-color: var(--accent-color, #0d6efd);
}

/* INPUT'un başlangıçtaki gizli hali */
.date-picker-container input[type="date"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none; /* Tıklanamaz yap */
}

/* EĞER CİHAZ DOKUNMATİK İSE BU STİLLER DEVREYE GİRECEK (JS ile eklenecek) */
.date-picker-container.touch-device input[type="date"] {
    /* Görünmez bir katman olarak metnin üzerine yerleş */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    
    /* Tekrar tıklanabilir yap */
    pointer-events: auto; 
    
    /* iOS'taki varsayılan stili temizle */
    -webkit-appearance: none;
}
.date-picker-container.touch-device input[type="date"]::-webkit-calendar-picker-indicator {
    display: none;
}

@media (max-width: 768px) { 
    .top-row { 
        flex-direction: column; 
    }
    
    h2 {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .category-filters {
        margin-left: 0;
        width: 100%;
    }
}