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

/* Base */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
}

/* Header */
.header {
    background-color: #5865F2;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 1.5rem;
}

.header h1 a {
    color: white;
    text-decoration: none;
}

.header .user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    background-color: rgba(255,255,255,0.2);
    border-radius: 4px;
    transition: background-color 0.2s;
}

.header a:hover {
    background-color: rgba(255,255,255,0.3);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Flash Messages */
.flash-message {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.flash-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

.flash-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #5865F2;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #4752C4;
}

.btn-secondary {
    background-color: #747f8d;
}

.btn-secondary:hover {
    background-color: #5b6470;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #5865F2;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #333;
}

/* Rooms Page */
.rooms-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.rooms-header h2 {
    color: #333;
}

.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.room-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.room-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.room-card h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.room-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.room-card .btn {
    width: 100%;
}

.empty-state {
    text-align: center;
    padding: 4rem;
    color: #666;
}

.empty-state h3 {
    margin-bottom: 1rem;
    color: #333;
}

/* Chat Room */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 140px);
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
}

.chat-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e0e0e0;
    background-color: #f8f9fa;
}

.chat-header h2 {
    margin: 0;
    color: #333;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    word-wrap: break-word;
}

.message-own {
    align-self: flex-end;
    background-color: #5865F2;
    color: white;
}

.message-other {
    align-self: flex-start;
    background-color: #f1f3f4;
    color: #333;
}

.message-author {
    font-weight: bold;
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    opacity: 0.9;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 0.25rem;
}

.chat-input {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e0e0e0;
    background-color: #f8f9fa;
}

.chat-input form {
    display: flex;
    gap: 0.75rem;
}

.chat-input input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.chat-input input:focus {
    outline: none;
    border-color: #5865F2;
}

.chat-input button {
    padding: 0.75rem 1.5rem;
}

.empty-chat {
    text-align: center;
    color: #999;
    padding: 3rem;
}