:root {
    /* Base Dark Theme (Default) */
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --container-bg: #1e1e1e;
    --accent-color: #42a5f5;
    /* Blue 400 - Visible on dark and light */
    --border-color: #333;
    --header-bg: #2c2c2c;
    --weekend-bg: #2d2d2d;
    --input-bg: #fff;
    --input-text: #000;
}

[data-theme="light"] {
    --bg-color: #f5f5f5;
    --text-color: #121212;
    --container-bg: #ffffff;
    --accent-color: #1976d2;
    /* Blue 700 - Better contrast on light */
    --border-color: #ccc;
    --header-bg: #e0e0e0;
    --weekend-bg: #e0e0e0;
    --input-bg: #fff;
    --input-text: #000;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

h1,
h2 {
    color: var(--accent-color);
}

.controls {
    background: var(--container-bg);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    gap: 20px;
    align-items: center;
    border: 1px solid var(--border-color);
}

.date-range {
    display: flex;
    gap: 10px;
    align-items: center;
}

select,
button,
.year-input {
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 16px;
    background-color: var(--input-bg);
    color: var(--input-text);
}

button {
    background-color: var(--accent-color);
    color: #fff;
    cursor: pointer;
    font-weight: bold;
    border: none;
}

button:hover {
    opacity: 0.9;
}

/* Theme Toggle Button */
.theme-toggle {
    margin-left: auto;
    /* Push to right */
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.theme-toggle:hover {
    background: var(--border-color);
}

.table-container {
    overflow-x: auto;
    margin-bottom: 30px;
}

table {
    width: 100%;
    min-width: 800px;
    /* Ensure it scrolls on small screens */
    border-collapse: collapse;
    background: var(--container-bg);
}

th,
td {
    border: 1px solid var(--border-color);
    padding: 4px;
    /* Reduced padding */
    text-align: center;
    font-size: 14px;
}

.employee-col,
.employee-name {
    width: 150px;
    min-width: 150px;
    /* Force min width */
    text-align: left;
    padding-left: 10px;
    font-weight: bold;
    position: sticky;
    left: 0;
    background-color: var(--container-bg);
    /* Opaque for sticky */
    z-index: 2;
    border-right: 2px solid var(--border-color);
    /* Separator */
}

.day-col,
.shift-cell {
    width: 30px;
    min-width: 30px;
}

th {
    background-color: var(--header-bg);
    color: var(--accent-color);
}

.holiday {
    background-color: #ff0000 !important;
    /* Bright Red */
    color: #fff !important;
    font-weight: bold;
}

.weekend {
    background-color: var(--weekend-bg);
}

.shift-cell.holiday {
    background-color: #ff0000 !important;
    /* Bright Red */
    color: #fff !important;
}

/* Ensure shift colors override specific holiday text colors if needed */
.shift-T1 {
    color: #0288d1;
    font-weight: bold;
}

/* Light Blue */
.shift-T2 {
    color: #388e3c;
    font-weight: bold;
}

/* Green */
.shift-T3 {
    color: #f57c00;
    font-weight: bold;
}

/* Orange */
.shift-D,
.shift-DS {
    background-color: #757575 !important;
    color: #ffffff !important;
    font-weight: bold;
}

/* In dark mode, holiday bg might need adjustment */
[data-theme="dark"] .shift-cell.holiday {
    background-color: #4a1c1c;
}