/* Styles specific to the planning page */
.canvas-container {
    margin-top: 25px;
    padding: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    max-height: 400px;
    overflow-y: auto;
    overflow-x: auto;
    transition: all 0.3s ease;
}

/* Date-based Canvas Colors - Eye-Friendly Dark Theme */
.canvas-container.today {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    border: 2px solid #4a6741;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.canvas-container.past {
    background: linear-gradient(135deg, #3d2c2c, #4a3a3a);
    border: 2px solid #5d4a4a;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    opacity: 0.85;
}

.canvas-container.future {
    background: linear-gradient(135deg, #2c4a3d, #3a5a4a);
    border: 2px solid #4a6b5a;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

canvas {
    cursor: pointer;
}

/* Enhanced Main Button */
.main-button {
    background: linear-gradient(135deg, #2c4a3d, #3a5a4a);
    border: 2px solid #4a6b5a;
    color: #ecf0f1;
    padding: 15px 30px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    transition: all 0.4s ease;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
    margin: 20px 0;
}

.main-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.main-button:hover::before {
    left: 100%;
}

.main-button:hover {
    background: linear-gradient(135deg, #3a5a4a, #2c4a3d);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border-color: #5d7a6a;
}

.main-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.app-header h1 {
    text-align: center;
    flex-grow: 1;
}

canvas.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.post-assignment-container {
    margin-top: 20px;
    padding: 15px;
    text-align: center;
}

.post-assignment-container h2 {
    margin-top: 0;
    font-size: 1.2em;
    color: #fff;
}

#assignment-status p {
    font-size: 1em;
    color: #eee;
    min-height: 24px; /* Reserve space to prevent layout shift */
}

#assign-post-day-btn {
    margin-top: 10px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: #5b2ab3;
    color: white;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
}

#assign-post-day-btn:disabled {
    background-color: #4a4a4a;
    cursor: not-allowed;
    opacity: 0.7;
}

#assign-post-day-btn.unassign {
    background-color: #b32a2a; /* A red color for un-assigning */
}

/* Shift Management Styles */
.shift-management-container {
    margin-top: 20px;
    padding: 15px;
    text-align: center;
}

.shift-management-container h2 {
    margin-top: 0;
    font-size: 1.2em;
    color: #fff;
}

.shift-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.secondary-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: #e74c3c;
    color: white;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
}

.secondary-btn:disabled {
    background-color: #4a4a4a;
    cursor: not-allowed;
    opacity: 0.7;
}

.vacation-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: #f39c12;
    color: white;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
}

.vacation-btn:disabled {
    background-color: #4a4a4a;
    cursor: not-allowed;
    opacity: 0.7;
}

.vacation-btn.active {
    background: #27ae60;
}

/* Custom scrollbar for canvas container */
.canvas-container::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.canvas-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.canvas-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.canvas-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}