* {
    font-family: 'Nunito', 'Segoe UI', 'Helvetica Neue', sans-serif;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px;
    background-color: #fffafc;
    background-image: linear-gradient(135deg, #ffe8f0 0%, #e5f0ff 100%);
}

#app {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    border: 2px solid #f0e6ff;
}

h1,
h2,
h3 {
    color: #805ad5;
    margin-bottom: 15px;
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    font-family: 'Pacifico', cursive;
    color: #d63384;
    margin-bottom: 30px;
}

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

button,
input[type="submit"] {
    cursor: pointer;
    background: #ff80ab;
    color: white;
    border: none;
    border-radius: 12px;
    padding: 10px 18px;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    box-shadow: 0 3px 6px rgba(255, 128, 171, 0.3);
}

button:hover {
    background: #ff5c9f;
    transform: translateY(-1px);
    box-shadow: 0 5px 10px rgba(255, 128, 171, 0.4);
}

.create-group-btn {
    background: #ff80ab;
    padding: 10px 22px;
    font-size: 16px;
}

.back-button {
    background: #c0c0c0;
    box-shadow: 0 2px 5px rgba(192, 192, 192, 0.4);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.modal-content {
    background: white;
    padding: 25px;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border: 2px solid #ffd6e0;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #6a4c93;
    margin-bottom: 8px;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #f3d1f4;
    border-radius: 10px;
    transition: border-color 0.3s;
    background: #fffafd;
}

input[type="text"]:focus,
textarea:focus {
    border-color: #d88dd1;
    outline: none;
    box-shadow: 0 0 0 4px rgba(216, 141, 209, 0.2);
}

.group-sections {
    display: flex;
    gap: 30px;
    margin-top: 25px;
}

.group-section {
    flex: 1;
    background: #fff1f9;
    padding: 20px;
    border-radius: 14px;
    border: 2px dashed #ffd6e0;
}

.group-section h3 {
    color: #d63384;
    margin-bottom: 12px;
    border-bottom: 2px solid #ffb3c6;
    padding-bottom: 6px;
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 20px;
}

.group-card {
    border: 2px solid #ffd6e0;
    border-radius: 16px;
    transition: 0.2s;
    background: #fffafd;
    overflow: hidden;
}

.group-card:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 12px rgba(255, 128, 171, 0.2);
}

.group-image,
.default-group-image {
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #ffe5f1;
    color: #d63384;
    font-weight: bold;
    font-size: 32px;
    border-bottom: 1px solid #ffb3c6;
}

.default-group-image {
    border-radius: 0;
}

.group-info {
    text-align: center;
    padding: 15px;
}

.open-btn,
.join-btn {
    font-size: 0.9rem;
    background: #f06292;
    margin: 4px auto;
}

.messages {
    background: #fffafd;
    padding: 15px;
    border: 2px solid #ffd6e0;
    border-radius: 14px;
    max-height: 400px;
    overflow-y: auto;
}

.message-item {
    background: #ffeef5;
    padding: 10px 12px;
    border-left: 5px solid #f06292;
    border-radius: 10px;
    margin-bottom: 10px;
}

.message-sender {
    color: #e91e63;
    font-weight: bold;
}

.message-time {
    color: #888;
    font-size: 0.75rem;
    float: right;
}

.edit-form input {
    border-color: #ffc1e3;
}

.save-btn {
    background: #81c784;
}

.cancel-btn {
    background: #ef5350;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.rename-btn,
.edit-btn,
.edit-group-btn {
    background: #ffd6e0;
    color: #d63384;
    border: 1px solid #ffb3c6;
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 8px;
}

.rename-btn:hover,
.edit-btn:hover,
.edit-group-btn:hover {
    background: #ffc1e3;
}

.leave-btn,
.delete-btn {
    background: #f44336;
    padding: 8px 14px;
    font-size: 14px;
    border-radius: 10px;
    color: white;
}

.loading-message,
.no-groups {
    text-align: center;
    padding: 15px;
    color: #999;
    font-style: italic;
}

@media (max-width: 600px) {
    .group-sections {
        flex-direction: column;
    }

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

    .header-controls {
        flex-direction: column;
        gap: 12px;
    }
}


.group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.group-header h2 {
    flex-grow: 1;
    font-size: 1.5em;
    margin: 0;
    color: #6a4c93;
}

.group-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #f3e5ff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.default-avatar {
    width: 100%;
    height: 100%;
    background-color: #ffb3c6;
    color: white;
    font-size: 20px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

.group-header .edit-group-btn,
.group-header .edit-btn {
    padding: 6px 12px;
    font-size: 0.9rem;
    background-color: #fff;
    color: #ffb3c6;
    border: 1px solid #ffb3c6;
    border-radius: 8px;
    margin-left: 10px;
    transition: background-color 0.2s ease;
}

.group-header .edit-group-btn:hover,
.group-header .edit-btn:hover {
    background-color: #f3e5ff;
}