:root {
    --primary-color: #4CAF50;
    --secondary-color: #45a049;
    --danger-color: #f44336;
    --danger-hover: #d32f2f;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
    --text-light: #ffffff;
    --text-dark: #333333;
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-gray);
    color: var(--text-color);
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

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

.btn.danger:hover {
    background-color: var(--danger-hover);
}

.auth-container {
    max-width: 400px;
    margin: 50px auto;
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.auth-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    background: #ddd;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
    border: 1px solid #ddd;
    border-radius: 4px;
}

header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--white);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
}

main {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

main > h1 {
    margin-bottom: 20px;
}

.add-board {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.add-board input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.add-board input[type="color"] {
    width: 50px;
    height: 40px;
    padding: 2px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
}

.boards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.board-item {
    background-color: var(--white);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.2s;
    position: relative;
}

.board-item:hover {
    transform: translateY(-5px);
}

.board-item h3 {
    margin-top: 0;
}

.board-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
}

.board-actions .btn {
    padding: 5px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.board-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.board-header h1 {
    margin: 0;
}

.add-card {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.add-card input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.add-card input[type="color"] {
    width: 50px;
    height: 40px;
    padding: 2px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.card-item {
    background-color: var(--white);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.2s;
    position: relative;
}

.card-item:hover {
    transform: translateY(-5px);
}

.card-item h3 {
    margin-top: 0;
}

.card-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
}

.card-actions .btn {
    padding: 5px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h1 {
    margin: 0;
}

.add-note {
    margin-bottom: 20px;
}

.add-note textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    min-height: 100px;
    margin-bottom: 10px;
    resize: vertical;
}

.note-options {
    display: flex;
    gap: 10px;
    align-items: center;
}

.note-options input[type="color"] {
    width: 50px;
    height: 40px;
    padding: 2px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
}

.notes-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.note-item {
    background-color: var(--white);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow);
    position: relative;
}

.note-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.note-actions button {
    padding: 5px 10px;
    font-size: 12px;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    max-width: 400px;
    position: relative;
}

.close {
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
}

/* Адаптивность */
@media (max-width: 768px) {
    .boards-container, .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .add-board, .add-card {
        flex-direction: column;
        align-items: stretch;
    }

    .add-board input[type="text"],
    .add-card input[type="text"] {
        min-width: auto;
    }
}

/* Принудительное задание цвета заголовкам */
main h1,
.board-header h1,
.card-header h1,
.board-item h3,
.card-item h3 {
    color: #000 !important;
}