@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Variables & Theme Configuration --- */
:root {
    --color-font-primary: 'Inter', sans-serif;

    --color-bg-primary: #f6f8fa;
    --color-bg-secondary: #ffffff;
    --color-nav-bg: #24292f;
    --color-nav-text: #ffffff;
    --color-nav-hover: #0969da;

    --color-text-primary: #24292f;
    --color-text-secondary: #57606a;

    --color-border: #d0d7de;
    --color-accent-blue: #0969da;
    --color-focus-shadow: rgba(9, 105, 218, 0.3);

    --color-error: #cf222e;
    --color-error-bg: #ffebe9;
    --color-success: #2da44e;
    --color-success-bg: #d8f5d8;
    --color-status-on: #2da44e;
    --color-status-off: #57606a;
}

[data-theme="dark"] {
    --color-bg-primary: #0d1117;
    --color-bg-secondary: #161b22;
    --color-nav-bg: #010409;
    --color-nav-text: #c9d1d9;
    --color-nav-hover: #1f6feb;

    --color-text-primary: #c9d1d9;
    --color-text-secondary: #848d97;
    --color-border: #30363d;
    --color-accent-blue: #58a6ff;
    --color-focus-shadow: rgba(88, 166, 255, 0.3);

    --color-error: #f85149;
    --color-error-bg: #341a1a;
    --color-success: #2ea043;
    --color-success-bg: #1a3a1f;
    --color-status-on: #2ea043;
    --color-status-off: #848d97;

    .data-table tbody tr:hover {
        background-color: #1f6feb33;
    }
}

/* --- Base Styles --- */
body {
    font-family: var(--color-font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    margin: 0;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 14px;
}

h1,
h2,
h3,
h4 {
    color: var(--color-text-primary);
    margin-top: 0;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 1.75rem;
}

h2 {
    font-size: 1.3rem;
}

/* --- Layout & Navigation --- */
.main {
    margin-left: 220px;
    padding: 20px;
    transition: margin-left 0.3s ease;
    display: block;
}

.module-container {
    max-width: 100%;
}

.topnav {
    display: none;
    background-color: var(--color-nav-bg);
    color: var(--color-nav-text);
    padding: 14px 20px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 2;
    height: 58px;
    border-bottom: 1px solid var(--color-border);
}

.topnav button {
    background: none;
    color: var(--color-nav-text);
    font-size: 24px;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-right: 10px;
}

.topnav span {
    font-weight: 600;
}

.sidenav {
    height: 100vh;
    width: 220px;
    background-color: var(--color-nav-bg);
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 58px;
    overflow-y: auto;
    transition: transform 0.3s ease-in-out;
    border-right: 1px solid var(--color-border);
    z-index: 1;
}

.sidenav a {
    display: block;
    color: var(--color-nav-text);
    padding: 10px 20px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s;
    border-left: 3px solid transparent;
}

.sidenav a:hover {
    background-color: var(--color-nav-hover);
    border-left-color: var(--color-accent-blue);
}

/* --- Forms & Inputs --- */
.card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(27, 31, 35, 0.04);
    width: 100%;
    box-sizing: border-box;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text-primary);
}

.input-group input[type="text"],
.input-group input[type="number"],
.input-group input[type="date"],
.input-group input[type="password"],
.input-group input[type="email"],
.input-group input[type="tel"],
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 6px 10px;
    box-sizing: border-box;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    appearance: none;
    font-size: 14px;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    border-color: var(--color-accent-blue);
    outline: none;
    box-shadow: 0 0 0 3px var(--color-focus-shadow);
}

/* --- Buttons --- */
button,
button[type="submit"],
.action-button {
    cursor: pointer;
    font-weight: 500;
    line-height: 20px;
    padding: 6px 14px;
    text-align: center;
    color: #ffffff;
    background-color: var(--color-accent-blue);
    border: 1px solid var(--color-accent-blue);
    border-radius: 6px;
    transition: background-color 0.15s ease;
    display: inline-block;
    font-family: var(--color-font-primary);
    font-size: 13px;
    text-decoration: none;
}

button:hover,
button[type="submit"]:hover,
.action-button:hover {
    background-color: #0c4d9a;
    border-color: #0c4d9a;
}

.action-button.delete,
.btn-delete {
    background-color: var(--color-error);
    border-color: var(--color-error);
}

.action-button.delete:hover,
.btn-delete:hover {
    background-color: #a40e1e;
    border-color: #a40e1e;
}

/* --- Messages & Alerts --- */
.message {
    padding: 10px 16px;
    margin-bottom: 16px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 13px;
}

.alert-success {
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success);
    color: var(--color-text-primary);
}

.alert-danger {
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error);
    color: var(--color-text-primary);
}

.status-on {
    color: var(--color-status-on);
    font-weight: 600;
}

.status-off {
    color: var(--color-status-off);
}

/* --- Tables --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin-top: 15px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 8px 10px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
}

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

.data-table thead {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.data-table thead tr:last-child th {
    border-bottom: 2px solid var(--color-border);
}

.data-table tbody tr:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

.data-table tbody tr:nth-child(odd) {
    background-color: var(--color-bg-primary);
}

.data-table tbody tr:hover {
    background-color: #e6f0f8;
}

@media (prefers-color-scheme: dark) {
    .data-table tbody tr:hover {
        background-color: #1f6feb33;
    }
}

.filter-row th {
    padding: 4px 8px;
}

.filter-row input {
    width: 100%;
    padding: 4px;
    box-sizing: border-box;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

/* --- Theme Transitions --- */
body,
.main,
.topnav,
.sidenav,
.card,
.widget-card,
.input-group input,
.input-group select,
.input-group textarea,
.data-table,
.data-table th,
.data-table td {
    transition: background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease;
}

/* --- Global Modal Styles --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--color-bg-secondary);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    width: 90%;
    color: var(--color-text-primary);
}

.modal-actions {
    margin-top: 15px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* --- Compact Mode Overrides --- */
.compact-view .card {
    padding: 12px 15px;
    margin-bottom: 12px;
}

.compact-view h1 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.compact-view h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.compact-view h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.compact-view .input-group {
    margin-bottom: 8px;
}

.compact-view .input-group label {
    font-size: 11px;
    margin-bottom: 2px;
}

.compact-view .input-group input,
.compact-view .input-group select,
.compact-view .input-group textarea {
    padding: 3px 8px;
    height: 28px;
    font-size: 12px;
}

.compact-view .action-button {
    padding: 4px 12px;
    font-size: 12px;
    line-height: 18px;
}

.compact-view .data-table {
    margin-top: 5px;
}

.compact-view .data-table th,
.compact-view .data-table td {
    padding: 4px 8px;
    font-size: 12px;
}

/* --- Responsive Media Queries --- */
@media (max-width: 1080px) {
    .topnav {
        display: flex;
        align-items: center;
    }

    .sidenav {
        transform: translateX(-100%);
        z-index: 3;
        padding-top: 0;
    }

    .sidenav.open {
        transform: translateX(0);
    }

    .main {
        margin-left: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 78px 10px 20px 10px;
    }

    .module-container {
        width: 100%;
        max-width: 800px;
    }
}

@media (max-width: 768px) {
    .card {
        padding: 15px;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .main {
        padding: 78px 5px 10px 5px;
    }

    .data-table {
        display: block;
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        border-radius: 0;
    }

    .data-table th,
    .data-table td {
        padding: 6px 8px;
        font-size: 12px;
    }

    .data-table .action-button {
        padding: 4px 8px;
        font-size: 11px;
        margin: 0 2px;
    }
}