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

:root {
    --primary-color: #3B82F6;
    --background-color: #FAFAFA;
    --card-background: #FFFFFF;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    color: #111827;
    background-color: var(--background-color);
}

/* Utility classes */
.hidden {
    display: none !important;
}

/* Transitions */
.transition {
    transition: all 200ms ease-in-out;
}

/* Form elements */
input[type="text"],
input[type="password"],
textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #E5E7EB;
    border-radius: 0.375rem;
    background-color: white;
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    ring: 2px var(--primary-color);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 200ms;
}

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

.btn-primary:hover {
    background-color: #2563EB;
}

/* Note item in sidebar */
.note-item {
    padding: 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: background-color 200ms;
}

.note-item:hover {
    background-color: #F3F4F6;
}

.note-item.active {
    background-color: #EFF6FF;
    border-left: 3px solid var(--primary-color);
}

/* Todo items */
.todo-item {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-radius: 0.375rem;
    background-color: #F9FAFB;
}

.todo-item input[type="checkbox"] {
    margin-right: 0.75rem;
}

.todo-item.completed {
    text-decoration: line-through;
    color: #6B7280;
}

/* Image thumbnails */
.image-thumbnail {
    position: relative;
    aspect-ratio: 1;
    border-radius: 0.375rem;
    overflow: hidden;
}

.image-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-thumbnail .delete-btn {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    padding: 0.25rem;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 9999px;
    color: white;
    cursor: pointer;
}

/* Admin panel styles */
.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: #F9FAFB;
    border-radius: 0.375rem;
}

.user-item .actions {
    display: flex;
    gap: 0.5rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 200ms ease-in-out;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    aside {
        width: 100%;
        height: auto;
        position: relative;
    }

    main {
        margin-left: 0;
    }

    .note-editor {
        margin: 1rem;
    }
}