/* --- Global Resets and Variables --- */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent-primary: #e94560;
    --accent-secondary: #533483;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #3a3a5a;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --font-family: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Header & Footer --- */
header {
    background: rgba(15, 52, 96, 0.5);
    backdrop-filter: blur(10px);
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

header h1 i {
    margin-right: 0.5rem;
    color: var(--accent-primary);
}

header nav {
    display: flex;
    gap: 1rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Main Content & Controls --- */
main {
    padding: 2rem;
    max-width: 1800px;
    margin: 0 auto;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1.5rem;
}

.controls h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    min-width: 300px;
    text-align: center;
}

/* --- Buttons --- */
button, .btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

button:hover, .btn:hover {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.2);
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
    border: none;
}
.btn-primary.full-width {
    width: 100%;
    justify-content: center;
}

.btn-danger {
    background: var(--danger-color);
    border: none;
}

/* --- Table Styles --- */
.table-container {
    overflow-x: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

#schedule-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 1400px;
}

#schedule-table th, #schedule-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

#schedule-table thead {
    background-color: var(--bg-tertiary);
}

#schedule-table th {
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.machine-name-cell {
    font-weight: 700;
    min-width: 200px;
    background-color: var(--bg-tertiary);
    position: sticky;
    left: 0;
    z-index: 5;
}

.machine-name-cell .shift {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.schedule-cell {
    vertical-align: top;
    height: 120px;
}
.schedule-cell.is-rest-day {
    background-image: repeating-linear-gradient(45deg, rgba(0,0,0,0.1), rgba(0,0,0,0.1) 10px, transparent 10px, transparent 20px);
}

.staff-member {
    background: var(--bg-tertiary);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    display: block;
    border-left: 3px solid var(--accent-secondary);
}
.staff-member .role {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-left: 5px;
}

/* --- Modals --- */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    width: 90%;
    max-width: 500px;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}
.modal-content.large {
    max-width: 900px;
}

.modal-backdrop.active .modal-content {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
}

.modal-content h3 {
    margin-bottom: 1.5rem;
    font-size: 1.6rem;
}

/* --- Management Table Styles --- */
.management-table-container {
    max-height: 60vh;
    overflow-y: auto;
    margin-top: 1.5rem;
}
.management-table {
    width: 100%;
    border-collapse: collapse;
}
.management-table th, .management-table td {
    padding: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}
.management-table thead {
    background-color: var(--bg-tertiary);
    position: sticky;
    top: 0;
}
.management-table tbody tr:hover {
    background-color: var(--bg-primary);
}
.management-table .actions {
    display: flex;
    gap: 0.5rem;
}
.actions button {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* --- Form Styles --- */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* Rotations Modal Specifics */
.rotation-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
}
.rotation-form-container {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* --- Loader, Toast, Scrollbar (same as before) --- */
.loader-backdrop { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px); display: flex; justify-content: center; align-items: center; z-index: 9999; visibility: hidden; opacity: 0; transition: opacity 0.3s ease, visibility 0.3s ease; }
.loader-backdrop.active { visibility: visible; opacity: 1; }
.spinner { width: 60px; height: 60px; border: 6px solid var(--border-color); border-top-color: var(--accent-primary); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
#toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--bg-tertiary); color: var(--text-primary); padding: 15px 20px; border-radius: 8px; box-shadow: 0 5px 15px rgba(0,0,0,0.3); border-left: 5px solid; display: flex; align-items: center; gap: 10px; opacity: 0; transform: translateX(100%); animation: slideIn 0.5s forwards; }
@keyframes slideIn { to { opacity: 1; transform: translateX(0); } }
.toast.toast-success { border-color: var(--success-color); }
.toast.toast-error { border-color: var(--danger-color); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-secondary); }

/* --- Responsiveness --- */
@media (max-width: 900px) {
    .rotation-grid {
        grid-template-columns: 1fr;
    }
    .modal-content.large {
        max-width: 95vw;
        max-height: 90vh;
        overflow-y: auto;
    }
}
@media (max-width: 768px) {
    header { flex-direction: column; gap: 1rem; text-align: center; }
    header nav { flex-wrap: wrap; justify-content: center; }
    main { padding: 1rem; }
    .controls { flex-direction: column; }
    .controls h2 { min-width: auto; font-size: 1.2rem; }
}