:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4cc9f0;
    --danger-color: #f72585;
    --warning-color: #f8961e;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}
/* theme */
[data-theme="dark"] {
    --primary-color: #4895ef;
    --secondary-color: #4361ee;
    --accent-color: #3f37c9;
    --light-color: #212529;
    --dark-color: #f8f9fa;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
    padding: 20px;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.theme-toggle {
    background: var(--primary-color);
    color: var(--light-color);
    border: none;
    padding: 8px 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.search-container {
    margin-bottom: 30px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: rgba(255, 255, 255, 0.7);
    box-shadow: var(--box-shadow);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

.search-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
}

.add-note-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.add-note-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.note {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: grab;
}

.note:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.note.dragging {
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.8);
}

.note-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.note-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
    word-break: break-word;
}

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

.note-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--dark-color);
    opacity: 0.7;
    transition: var(--transition);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.note-btn:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.05);
}

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

.note-btn.pin {
    color: var(--warning-color);
}

.note-btn.pin.active {
    color: var(--warning-color);
    opacity: 1;
}

.note-content {
    font-size: 0.95rem;
    color: var(--dark-color);
    margin-bottom: 15px;
    word-break: break-word;
    white-space: pre-wrap;
}

.note-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(0, 0, 0, 0.6);
}

.note-date {
    font-family: 'Roboto Mono', monospace;
}

.note-color {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(-20px);
    transition: var(--transition);
    position: relative;
}

.modal.active .modal-content {
    transform: translateY(0);
}

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

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-color);
    opacity: 0.7;
    transition: var(--transition);
}

.close-btn:hover {
    opacity: 1;
    color: var(--danger-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.color-options {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.color-option {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.color-option.selected {
    border-color: var(--dark-color);
    transform: scale(1.1);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--dark-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.05);
}

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

.btn-danger:hover {
    background: #d11a66;
}

.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: rgba(0, 0, 0, 0.5);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.empty-state-text {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--dark-color);
    color: var(--light-color);
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1001;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.pinned-notes {
    margin-bottom: 30px;
}

.section-title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (max-width: 768px) {
    .notes-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .notes-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 20px;
        margin: 0 15px;
    }
}