:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --accent-color: #198754;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --border-color: #dee2e6;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

.diary-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

.calendar-container {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.diary-entry-container {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

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

.calendar-nav button {
    border-radius: 4px;
    padding: 5px 10px;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--dark-color);
    cursor: pointer;
}

.calendar-nav button:hover {
    background-color: var(--light-color);
}

.calendar-title {
    display: flex;
    align-items: center;
    justify-content: center;
}

#current-month {
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
    font-size: 1.2rem;
}

#current-year {
    font-size: 1rem;
    color: var(--secondary-color);
    margin-left: 5px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.calendar-day:hover {
    background-color: var(--light-color);
}

.calendar-day.selected {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.calendar-day.has-entry {
    position: relative;
}

.calendar-day.has-entry::after {
    content: '';
    position: absolute;
    bottom: 3px;
    right: 3px;
    width: 6px;
    height: 6px;
    background-color: var(--accent-color);
    border-radius: 50%;
}

.calendar-day.today {
    font-weight: 600;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    background-color: transparent;
}

.calendar-day.disabled {
    color: var(--secondary-color);
    cursor: not-allowed;
    background-color: var(--light-color);
}

.calendar-day.disabled:hover {
    background-color: var(--light-color);
}

.auth-container {
    max-width: 500px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 30px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 8px 8px 0 0;
}

.auth-logo {
    margin-bottom: 25px;
    text-align: center;
}

.auth-logo i {
    font-size: 3rem;
    color: var(--primary-color);
}

.auth-logo h2 {
    margin-top: 10px;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 1.8rem;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 8px;
    background: white;
    box-shadow: var(--shadow);
    position: relative;
}

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

.app-logo i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.app-logo h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark-color);
}

.user-actions {
    display: flex;
    align-items: center;
    position: relative;
}

.user-actions .dropdown-toggle {
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: var(--shadow);
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--primary-color);
}

.user-actions .dropdown-toggle:hover {
    background-color: var(--light-color);
}

.dropdown-menu {
    min-width: 200px;
    border-radius: 4px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    padding: 5px 0;
    background: white;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 5px;
    z-index: 1000;
}

.dropdown-item {
    padding: 8px 20px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.dropdown-item:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

#dropdown-user-name {
    font-weight: 600;
    color: var(--primary-color);
    padding: 5px 20px;
}

.form-control {
    border-radius: 4px;
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn {
    border-radius: 4px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #5c636a;
    border-color: #565e64;
}

.input-group .btn {
    border-color: var(--border-color);
    border-radius: 0 4px 4px 0;
}

.input-group .btn:hover {
    background-color: var(--light-color);
}

.entry-content {
    min-height: 400px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    padding: 15px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.entry-content:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.diary-display {
    min-height: 400px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 4px;
    white-space: pre-wrap;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

.entry-content-wrapper {
    flex-grow: 1;
    font-size: 1rem;
    line-height: 1.6;
}

.entry-time {
    font-style: italic;
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-top: 10px;
    text-align: right;
    padding-top: 8px;
    border-top: 1px dashed var(--border-color);
}

.entry-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
}

.nav-pills .nav-link {
    border-radius: 4px;
    font-weight: 500;
    padding: 8px 16px;
    transition: all 0.2s;
    color: var(--dark-color);
}

.nav-pills .nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-pills .nav-link:hover {
    background-color: var(--light-color);
}

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1050;
}

.toast {
    min-width: 300px;
    border-radius: 4px;
    box-shadow: var(--shadow);
    background: white;
    border: 1px solid var(--border-color);
}

.toast-header {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.toast-progress {
    height: 4px;
    margin-top: 8px;
    overflow: hidden;
    background-color: rgba(255, 255, 255, 0.3);
}

.progress-bar {
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    width: 100%;
    animation: progress 2s linear forwards;
}

@keyframes progress {
    from { width: 100%; }
    to { width: 0%; }
}

.alert {
    border-radius: 4px;
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    background: white;
}

.alert-danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.alert-success {
    color: var(--success-color);
    border-color: var(--success-color);
}

.modal-content {
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    background: white;
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px 8px 0 0;
    border: none;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

/* Mobile-specific adjustments */
@media (max-width: 768px) {
    .diary-container {
        padding: 10px;
    }
    
    .calendar-container {
        max-width: 100%;
        padding: 15px;
    }
    
    .calendar-day {
        font-size: 0.8rem;
    }
    
    .diary-entry-container {
        padding: 15px;
    }
    
    .entry-content, .diary-display {
        min-height: 300px;
    }
    
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 15px;
        padding: 12px 15px;
    }
    
    .app-logo {
        margin-bottom: 10px;
    }
    
    .app-logo h1 {
        font-size: 1.6rem;
    }
    
    .user-actions {
        align-self: flex-end;
        margin-top: -40px;
        position: relative;
    }
    
    .entry-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .entry-actions button {
        width: 100%;
    }
    
    .user-actions .dropdown-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.6rem;
    }
    
    .dropdown-menu {
        right: 0;
        left: auto;
        min-width: 180px;
    }
    
    .calendar-nav .btn {
        padding: 4px 8px;
        font-size: 0.8rem;
    }
    
    .auth-logo i {
        font-size: 2.5rem;
    }
    
    .auth-logo h2 {
        font-size: 1.6rem;
    }
    
    .auth-container {
        padding: 25px 20px;
        width: 95%;
    }
    
    /* Password toggle button improvements for mobile */
    .input-group {
        align-items: stretch;
    }
    
    .form-control {
        min-height: 44px; /* Recommended minimum touch target size */
    }
    
    .input-group .btn {
        padding: 10px 15px; /* Increase padding for better touch target */
        font-size: 1.2rem; /* Make the icon bigger */
        height: auto;
    }
    
    /* Button active states for touch feedback */
    .btn:active,
    .input-group .btn:active {
        background-color: var(--light-color);
        transform: scale(0.98);
    }
    
    .nav-pills .nav-link:active {
        background-color: var(--light-color);
    }
    
    .dropdown-item:active {
        background-color: var(--light-color);
        color: var(--primary-color);
    }
    
    .calendar-day:active {
        background-color: var(--light-color);
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 20px 15px;
        width: 98%;
    }
    
    .calendar-day {
        font-size: 0.7rem;
        padding: 3px;
    }
    
    .calendar-header h3 {
        font-size: 1.1rem;
    }
    
    #current-year {
        font-size: 0.9rem;
    }
    
    .diary-entry-container {
        padding: 15px;
    }
    
    .entry-content, .diary-display {
        min-height: 250px;
        font-size: 0.9rem;
    }
    
    .app-logo h1 {
        font-size: 1.4rem;
    }
    
    .app-logo i {
        font-size: 1.8rem;
        margin-right: 10px;
    }
    
    #dropdown-user-name {
        font-size: 0.85rem;
    }
    
    .dropdown-menu {
        min-width: 150px;
        font-size: 0.85rem;
        right: 0;
        left: auto;
    }
    
    .toast {
        min-width: 200px;
        font-size: 0.85rem;
    }
    
    .calendar-nav .btn {
        padding: 3px 6px;
        font-size: 0.7rem;
    }
    
    .user-actions .dropdown-toggle {
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
    }
    
    .auth-logo i {
        font-size: 2rem;
    }
    
    .auth-logo h2 {
        font-size: 1.4rem;
    }
    
    .form-control, .btn {
        font-size: 0.9rem;
    }
    
    .nav-pills .nav-link {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    /* Extra small screen adjustments for password toggle */
    .input-group .btn {
        padding: 8px 12px;
        font-size: 1rem;
    }
}

/* Remove hover effects on touch devices */
@media (hover: none) {
    .input-group .btn:hover {
        background-color: transparent;
    }
    
    .calendar-day:hover {
        background-color: transparent;
    }
    
    .btn-primary:hover, .btn-secondary:hover {
        background-color: inherit;
    }
    
    .dropdown-item:hover {
        background-color: inherit;
    }
    
    .nav-pills .nav-link:hover {
        background-color: inherit;
    }
    
    .user-actions .dropdown-toggle:hover {
        background-color: white;
    }
}