:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #f44336;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --card-bg: white;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --input-bg: white;
    --placeholder-color: #999;
}

.dark-theme {
    --primary-color: #66BB6A;
    --secondary-color: #64B5F6;
    --danger-color: #E57373;
    --text-color: #e0e0e0;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --input-bg: #2d2d2d;
    --placeholder-color: #aaa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

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

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

#menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 50%;
    background-color: var(--card-bg);
}

.user-section input {
    padding: 8px;
    margin-right: 5px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.user-section input::placeholder {
    color: var(--placeholder-color);
}

.user-section button {
    padding: 8px 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.user-section button:hover {
    opacity: 0.9;
}

.main-content {
    display: flex;
    gap: 20px;
    position: relative;
}

.notes-sidebar {
    width: 300px;
    background: var(--card-bg);
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: transform 0.3s ease;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.sidebar-header h2 {
    font-size: 18px;
}

#new-note-btn {
    padding: 6px 10px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

.search-box {
    position: relative;
    margin-bottom: 15px;
}

.search-box input {
    width: 100%;
    padding: 8px 30px 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.search-box i {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--placeholder-color);
}

.note-item {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s;
}

.note-item:hover {
    background-color: var(--bg-color);
}

.note-item h3 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-color);
}

.note-item p {
    font-size: 14px;
    color: var(--placeholder-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.shared-notes-section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.note-editor {
    flex: 1;
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px var(--shadow-color);
    min-height: 500px;
}

#no-note-selected {
    text-align: center;
    padding: 40px;
    color: var(--placeholder-color);
}

#no-note-selected i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--border-color);
}

.editor-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.mobile-back-button {
    display: none;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    margin-right: 10px;
    padding: 5px;
}

#editor-title {
    font-size: 1.2rem;
    color: var(--text-color);
}

#note-title {
    width: 100%;
    padding: 12px;
    font-size: 1.5rem;
    border: none;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

#note-title:disabled {
    color: var(--placeholder-color);
}

#note-content {
    width: 100%;
    height: 300px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    resize: vertical;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-family: inherit;
}

#note-content:disabled {
    color: var(--placeholder-color);
}

.editor-actions {
    margin: 15px 0;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.editor-actions button {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

#save-note-btn {
    background-color: var(--primary-color);
    color: white;
}

#delete-note-btn {
    background-color: var(--danger-color);
    color: white;
}

#share-note-btn {
    background-color: var(--secondary-color);
    color: white;
}

.sharing-section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.share-control {
    display: flex;
    gap: 10px;
    margin: 10px 0;
}

.share-control input {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.share-control button {
    padding: 8px 12px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.shared-user {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    background-color: var(--bg-color);
    border-radius: 4px;
    margin-bottom: 5px;
}

.remove-share {
    color: var(--danger-color);
    cursor: pointer;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 15% auto;
    padding: 20px;
    border-radius: 8px;
    width: 300px;
    position: relative;
    box-shadow: 0 4px 8px var(--shadow-color);
}

.permission-options {
    margin: 10px 0;
}

.permission-options label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.close {
    color: var(--placeholder-color);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 15px;
    top: 10px;
}

.close:hover {
    color: var(--text-color);
}

/* Адаптивность для мобильных устройств */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .user-section {
        width: 100%;
        justify-content: space-between;
    }
    
    #auth-section {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
    }
    
    #auth-section input {
        flex: 1;
        min-width: 120px;
    }
    
    .main-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .notes-sidebar {
        width: 100%;
        position: fixed;
        top: 0;
        left: -100%;
        height: 100vh;
        z-index: 999;
        overflow-y: auto;
        transition: left 0.3s ease;
        box-shadow: 2px 0 10px var(--shadow-color);
    }
    
    .notes-sidebar.active {
        left: 0;
    }
    
    .note-editor {
        width: 100%;
        min-height: calc(100vh - 100px);
    }
    
    #menu-toggle {
        display: block;
    }
    
    .mobile-back-button {
        display: block;
    }
    
    .editor-actions {
        flex-direction: column;
    }
    
    .editor-actions button {
        width: 100%;
        justify-content: center;
    }
    
    .share-control {
        flex-direction: column;
    }
    
    /* Исправление для мобильных: сайдбар не перекрывает редактор */
    .notes-sidebar {
        transform: translateX(-100%);
        z-index: 1000;
    }
    
    .notes-sidebar.active {
        transform: translateX(0);
    }
    
    .note-editor {
        transform: translateX(0) !important;
        width: 100%;
        margin-left: 0;
        position: relative;
        z-index: 2;
    }
}

@media (max-width: 480px) {
    .user-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    #auth-section {
        width: 100%;
    }
    
    #auth-section input, #auth-section button {
        width: 100%;
        margin: 5px 0;
    }
    
    .modal-content {
        width: 90%;
        margin: 50% auto;
    }
    
    #no-note-selected {
        padding: 20px;
    }
    
    #no-note-selected i {
        font-size: 2rem;
    }
}

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

.note-item {
    animation: fadeIn 0.3s ease;
}

/* Полоса прокрутки */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--placeholder-color);
}

/* Улучшения для мобильного ввода */
input, textarea, button {
    font-size: 16px !important; /* Предотвращает масштабирование в iOS */
}

.edit-badge {
    color: var(--secondary-color);
    font-size: 0.8rem;
    margin-left: 5px;
}