:root {
    --bg-color: #222;
    --text-color: #fff;
    --primary-color: rgb(26, 165, 165);
    --secondary-color: #09132d;
    --accent-color: crimson;
    --input-bg: #333;
    --input-color: #fff;
    --transition-speed: 0.3s;
    --card-bg: #2d2d2d;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    padding-bottom: 60px;
}

.crud {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.head {
    margin-bottom: 30px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-container img {
    border-radius: 50%;
    padding: 8px;
    background-color: var(--primary-color);
    transition: transform var(--transition-speed);
}

.logo-container img:hover {
    transform: scale(1.05);
}

.header-text {
    display: flex;
    flex-direction: column;
}

.head h1 {
    font-size: 2.2rem;
    margin-bottom: 5px;
    text-transform: uppercase;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    color: transparent;
}

.head p {
    font-size: 1.1rem;
    opacity: 0.8;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    padding: 10px 15px;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.theme-toggle:hover,
.theme-toggle:focus {
    background-color: var(--accent-color);
    outline: none;
    transform: translateY(-2px);
}

.theme-icon {
    font-size: 1.2rem;
}

/* Card Styles */
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
}

/* Section Headers */
section h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Form Styles */
.form-group {
    margin-bottom: 15px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.input-icon {
    position: relative;
}

.input-icon i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
}

input {
    width: 100%;
    padding: 12px;
    padding-left: 35px;
    margin-bottom: 0;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    background-color: var(--input-bg);
    color: var(--input-color);
    transition: all var(--transition-speed);
    font-size: 0.95rem;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 165, 165, 0.2);
}

.price-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.price-inputs>.form-group {
    flex: 1 1 calc(25% - 15px);
    min-width: 150px;
    margin-bottom: 0;
}

#total {
    display: block;
    background-color: transparent;
    color: var(--text-color);
    padding: 12px;
    border-radius: var(--border-radius);
    text-align: center;
    margin: 15px 0;
    font-weight: bold;
    font-size: 1.1rem;
    border: 2px dashed var(--primary-color);
    transition: all var(--transition-speed);
}

#submit {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: 1rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

#submit:hover,
#submit:focus {
    background-color: var(--accent-color);
    outline: none;
    transform: translateY(-2px);
}

/* Search Styles */
.search-block {
    margin-bottom: 25px;
}

.search-container {
    position: relative;
    margin-bottom: 15px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
}

#search {
    padding-left: 35px;
}

.btn-search {
    display: flex;
    gap: 15px;
}

.btn-search button {
    flex: 1;
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 600;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn-search button:hover,
.btn-search button:focus {
    background-color: var(--accent-color);
    outline: none;
    transform: translateY(-2px);
}

/* Table Styles */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th,
td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid rgba(26, 165, 165, 0.2);
}

th {
    background-color: var(--primary-color);
    color: var(--text-color);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

th:first-child {
    border-top-left-radius: var(--border-radius);
}

th:last-child {
    border-top-right-radius: var(--border-radius);
}

tr:nth-child(even) {
    background-color: rgba(26, 165, 165, 0.05);
}

tr:hover {
    background-color: rgba(26, 165, 165, 0.1);
}

/* Button Styles */
.update-btn,
.delete-btn {
    padding: 8px 12px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 100%;
}

.update-btn {
    background-color: var(--primary-color);
    color: var(--text-color);
}

.delete-btn {
    background-color: var(--accent-color);
    color: var(--text-color);
}

.update-btn:hover,
.update-btn:focus,
.delete-btn:hover,
.delete-btn:focus {
    opacity: 0.9;
    outline: none;
    transform: translateY(-2px);
}

.delete-all-btn {
    width: 100%;
    padding: 10px 15px;
    background-color: var(--accent-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 600;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}

.delete-all-btn:hover {
    background-color: #e41a2d;
    transform: translateY(-2px);
}

/* No Products Message */
.no-products {
    text-align: center;
    padding: 30px;
    background-color: rgba(26, 165, 165, 0.05);
    border-radius: var(--border-radius);
    border: 1px dashed var(--primary-color);
}

.no-products i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.no-products p {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Footer Styles */
footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Light Mode Styles */
body.light-mode {
    --bg-color: #f4f4f4;
    --text-color: #333;
    --secondary-color: #e0e0e0;
    --input-bg: #fff;
    --input-color: #333;
    --card-bg: #fff;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body.light-mode .head h1 {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    color: transparent;
}

body.light-mode footer {
    border-top-color: rgba(0, 0, 0, 0.1);
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .logo-container {
        flex-direction: column;
        gap: 10px;
    }

    .price-inputs {
        flex-direction: column;
        gap: 15px;
    }

    .price-inputs>.form-group {
        width: 100%;
    }

    .form-row {
        flex-direction: column;
    }

    .btn-search {
        flex-direction: column;
    }

    th,
    td {
        padding: 8px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .crud {
        width: 95%;
        padding: 10px;
    }

    .card {
        padding: 15px;
    }

    section h2 {
        font-size: 1.3rem;
    }
}