:root {
    /* DEFAULT DARK THEME (Modern Dark Grey) */
    --bg-body: #121212;
    --bg-card: #2c2c2c;
    /* Slightly lighter as requested */
    --bg-input: #3a3a3a;
    /* Lighter inputs */
    --text-main: #e0e0e0;
    --text-muted: #b0b0b0;
    --border-color: #444444;

    --accent-primary: #007acc;
    --accent-primary-hover: #005f9e;

    --accent-danger: #e25555;
    --accent-danger-hover: #c93c3c;

    --accent-success: #60be79;
    --accent-success-hover: #4ea866;

    --accent-warning: #dfa537;
    --accent-warning-hover: #c48e24;

    --nav-bg: #2d2d2d;
    --nav-link: #cccccc;
    --nav-link-hover: #ffffff;

    --table-header-bg: #3a3a3a;
    /* Same as bg-input */
    --table-stripe: #252525;
    --table-hover: #37373d;

    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-input: 0 0 0 2px rgba(0, 122, 204, 0.3);

    --radius-main: 12px;
    /* 12px rounding as requested */
}

[data-theme="light"] {
    /* LIGHT THEME */
    --bg-body: #f4f6f8;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --text-main: #2c3e50;
    --text-muted: #7f8c8d;
    --border-color: #e1e4e8;

    --accent-primary: #3498db;
    --accent-primary-hover: #2980b9;

    --accent-danger: #e74c3c;
    --accent-danger-hover: #c0392b;

    --accent-success: #2ecc71;
    --accent-success-hover: #27ae60;

    --accent-warning: #f1c40f;
    --accent-warning-hover: #d4ac0d;

    --nav-bg: #ffffff;
    --nav-link: #555555;
    --nav-link-hover: #000000;

    --table-header-bg: #f8f9fa;
    --table-stripe: #ffffff;
    --table-hover: #f1f2f6;

    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-input: 0 0 0 2px rgba(52, 152, 219, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Card Style Container */
.container,
nav,
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-main);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-card);
}

nav {
    background-color: var(--nav-bg);
    padding: 12px 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
    gap: 15px;
}

.nav-links {
    display: flex;
    gap: 10px;
    align-items: center;
}

nav a {
    color: var(--nav-link);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s ease;
    padding: 8px 16px;
    border-radius: 20px;
    /* Pill style */
    border: 1px solid transparent;
}

nav a:hover {
    background-color: var(--bg-input);
    color: var(--nav-link-hover);
    border-color: var(--border-color);
    text-decoration: none;
}

nav a.active {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.nav-logo-container {
    display: flex;
    align-items: center;
}

.nav-right {
    display: flex;
    gap: 10px;
    align-items: center;
}

.nav-btn-special {
    background-color: var(--accent-warning) !important;
    color: white !important;
    border-color: var(--accent-warning) !important;
}

.nav-btn-special:hover {
    background-color: var(--accent-warning-hover) !important;
    border-color: var(--accent-warning-hover) !important;
    color: white !important;
    opacity: 0.9;
}

/* Home link: green pill so the way back to the app menu stands out from
   the regular nav links (user request). */
.nav-btn-home {
    background-color: var(--accent-success) !important;
    color: white !important;
    border-color: var(--accent-success) !important;
}

.nav-btn-home:hover {
    background-color: var(--accent-success-hover) !important;
    border-color: var(--accent-success-hover) !important;
    color: white !important;
    opacity: 0.9;
}

.nav-logo {
    height: 40px;
    width: auto;
    border-radius: 8px;
    object-fit: contain;
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
    margin-top: 0;
    margin-bottom: 16px;
    color: var(--text-main);
    font-weight: 600;
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 30px 0;
}

/* Links */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-primary-hover);
    text-decoration: underline;
}

/* Forms & Inputs */
input[type="text"],
input[type="number"],
input[type="date"],
input[type="password"],
input[type="email"],
input[type="url"],
input[type="tel"],
textarea,
select {
    background-color: var(--bg-input);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-main);
    padding: 10px 14px;
    font-size: 15px;
    width: 100%;
    box-sizing: border-box;
    display: block;
    margin-bottom: 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-input);
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-main);
    font-weight: 500;
    font-size: 14px;
}

/* Filter bar rows (list pages): fields and action buttons on one level.
   align-items:flex-end aligns MARGIN boxes, and inputs/selects carry a global
   margin-bottom:16px while .btn has none — that difference is what pushed the
   buttons below the search line. .filter-row zeroes bottom margins inside the
   row so every child's bottom edge is the input line itself. */
.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: flex-end;
}

.filter-row label {
    margin-bottom: 0;
}

.filter-row label>span {
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
}

.filter-row input,
.filter-row select,
.filter-row .btn,
.filter-row button {
    margin-bottom: 0;
}

/* Native inputs are 46px tall (padding 10 + line 1.6 of 15px + border); the
   default .btn (padding 10, line 1.4 of 14px) is ~40px, so its top edge sat a
   few px below the input tops. Match the height so the whole row reads level. */
.filter-row .btn,
.filter-row button {
    padding-top: 13px;
    padding-bottom: 13px;
}

/* TomSelect replaces <select> with .ts-wrapper (any inline margin-bottom stays
   on the hidden original select). Match the wrapper's control metrics to the
   app's native inputs (padding 10/14, font 15) so TS-enhanced selects are the
   same height as plain inputs and sit level with them. */
.ts-wrapper .ts-control {
    padding: 10px 14px;
    font-size: 15px;
}

.ts-wrapper .ts-control>input {
    font-size: 15px;
}

/* Buttons */
button,
.btn {
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-main);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: all 0.2s ease;
    color: #fff;
    line-height: 1.4;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button:hover,
.btn:hover {
    text-decoration: none;
    filter: brightness(0.9);
}

button:active,
.btn:active {
    transform: translateY(1px);
    box-shadow: none;
    filter: brightness(0.8);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
    color: white;
}

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

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    color: white;
}

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

.btn-success:hover {
    background-color: var(--accent-success-hover);
    color: white;
}

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

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

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

.btn-warning:hover {
    background-color: var(--accent-warning-hover);
    color: white;
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    /* Required for rounded corners */
    border-spacing: 0;
    margin-top: 10px;
    margin-bottom: 10px;
    background-color: transparent;
    /* Seamless with card */
    border-radius: var(--radius-main);
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    /* Subtle table shadow */
}

th,
td {
    border-bottom: 1px solid var(--border-color);
    padding: 14px 16px;
    text-align: left;
    vertical-align: middle;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    /* Subtle vertical lines */
}

th:last-child,
td:last-child {
    border-right: none;
}

th {
    background-color: var(--table-header-bg);
    color: var(--text-main);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
    text-align: center;
}

tr:last-child td {
    border-bottom: none;
}

tr:nth-child(even) {
    background-color: var(--table-stripe);
}

tr:hover td {
    background-color: var(--table-hover);
}

/* Image thumbnails in tables */
td img {
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Tom Select Overrides */
.ts-control {
    background-color: var(--bg-input) !important;
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
    border-radius: var(--radius-main) !important;
    padding: 10px 14px !important;
}

.ts-control input {
    color: var(--text-main) !important;
    /* Ensure input text is visible */
}

.ts-dropdown {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
}

.ts-dropdown .option {
    color: var(--text-main) !important;
    padding: 8px 12px !important;
}

.ts-dropdown .active {
    background-color: var(--accent-primary) !important;
    color: white !important;
}

/* Flash Messages / Alerts */
.alert {
    padding: 16px;
    border-radius: 6px;
    margin-bottom: 24px;
    border: 1px solid transparent;
    font-weight: 500;
}

.alert-error {
    background-color: rgba(226, 85, 85, 0.15);
    border-color: var(--accent-danger);
    color: var(--accent-danger);
}

.alert-success {
    background-color: rgba(96, 190, 121, 0.15);
    border-color: var(--accent-success);
    color: var(--accent-success);
}

/* --- UI Refinements --- */

/* Split Layout for Category Defaults / Brands */
.split-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
    align-items: start;
}

@media (max-width: 900px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
}

/* Compact Forms in Split Layout */
.compact-form label {
    font-size: 13px;
    margin-bottom: 4px;
}

.compact-form input[type="text"],
.compact-form input[type="number"],
.compact-form button {
    margin-bottom: 12px;
}

.compact-form .form-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.compact-form .form-group label {
    margin-bottom: 0;
    flex: 1;
}

.compact-form .form-group input {
    width: 60%;
    margin-bottom: 0;
}

/* Product Table Fixed Row Height */
.product-table tr {
    height: 100px;
}

.product-table td img {
    max-height: 80px;
    width: auto;
    object-fit: cover;
    display: block;
    margin: 0 auto;
}

/* File Input Styling */
.file-upload-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    border: 2px dashed var(--border-color);
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    background-color: var(--bg-input);
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.file-upload-wrapper:hover {
    border-color: var(--accent-primary);
}

.file-upload-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
    height: 100%;
    width: 100%;
}

.file-upload-text {
    color: var(--text-muted);
    pointer-events: none;
}

/* Grid Layouts */
.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.grid-2-col-asymmetric {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 30px;
}

@media (max-width: 1200px) {
    .grid-3-col {
        grid-template-columns: 1fr 1fr;
    }

    .grid-2-col-asymmetric {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 800px) {
    .grid-3-col {
        grid-template-columns: 1fr;
    }
}