* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }
body { background: #f0f2f5; }

.brand { color: #128C7E; font-size: 20px; margin-bottom: 8px; }

/* ── AUTH PAGES ── */
.auth-container {
    max-width: 400px; margin: 60px auto;
    background: white; padding: 40px;
    border-radius: 12px; box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    text-align: center;
}
.auth-logo { font-size: 48px; margin-bottom: 8px; }
.auth-container h2 { color: #555; margin-bottom: 24px; font-size: 16px; }
.auth-container input[type="text"],
.auth-container input[type="password"] {
    width: 100%; padding: 12px; margin-bottom: 12px;
    border: 1px solid #ddd; border-radius: 8px; font-size: 14px;
    outline: none;
}
.auth-container input:focus { border-color: #128C7E; }
.file-label {
    display: block; text-align: left; font-size: 13px;
    color: #666; margin-bottom: 12px; cursor: pointer;
}
.file-label input { margin-top: 6px; width: 100%; }
.auth-container button {
    width: 100%; padding: 12px; background: #128C7E;
    color: white; border: none; border-radius: 8px;
    font-size: 16px; cursor: pointer; margin-top: 4px;
    transition: background 0.2s;
}
.auth-container button:hover { background: #075E54; }
.auth-container p { margin-top: 16px; color: #666; }
.auth-container a { color: #128C7E; }
.error { color: #e53935; margin-bottom: 12px; font-size: 13px; }
.back-link { display: block; margin-top: 20px; color: #128C7E; font-size: 14px; }

/* ── PROFILE PICS ── */
.profile-pic-large { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; }
.avatar-large {
    width: 80px; height: 80px; border-radius: 50%;
    background: #128C7E; color: white;
    display: flex; align-items: center; justify-content: center;
    font-size: 32px; font-weight: bold; margin: 0 auto;
}

/* ── BLOCKED PAGE ── */
.blocked-user-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 0; border-bottom: 1px solid #eee;
}
.blocked-user-info { display: flex; align-items: center; gap: 10px; }
.unblock-link { color: #128C7E; font-size: 13px; text-decoration: none; }
.unblock-link:hover { text-decoration: underline; }
.no-users { color: #999; margin-top: 16px; font-size: 13px; }

/* ── APP LAYOUT ── */
.app-container { display: flex; height: 100vh; overflow: hidden; }

/* ── SIDEBAR ── */
.sidebar { width: 320px; background: white; border-right: 1px solid #e0e0e0; display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar-header {
    background: #128C7E; color: white; padding: 14px 16px;
    display: flex; justify-content: space-between; align-items: center;
    flex-shrink: 0;
}
.sidebar-header h2 { color: white; font-size: 15px; }
.header-actions { display: flex; gap: 8px; }
.icon-btn { font-size: 18px; text-decoration: none; line-height: 1; }

.search-box { padding: 10px; border-bottom: 1px solid #eee; flex-shrink: 0; }
.search-box form { display: flex; gap: 8px; }
.search-box input {
    flex: 1; padding: 8px 12px;
    border: 1px solid #ddd; border-radius: 20px; font-size: 13px;
    outline: none;
}
.search-box input:focus { border-color: #128C7E; }
.search-box button {
    padding: 8px 12px; background: #128C7E;
    color: white; border: none; border-radius: 20px; cursor: pointer;
}

.contacts-list { flex: 1; overflow-y: auto; }

/* ── CONTACT ITEMS ── */
.contact-item-wrapper {
    display: flex; align-items: center;
    border-bottom: 1px solid #f5f5f5;
    transition: background 0.15s;
}
.contact-item-wrapper:hover { background: #f5f5f5; }
.contact-item {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px; text-decoration: none;
    color: #333; flex: 1; min-width: 0;
}
.contact-info {
    display: flex; flex-direction: column; gap: 2px;
    min-width: 0; flex: 1;
}
.contact-name { font-weight: 500; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.last-msg {
    font-size: 12px; color: #999;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.unread-badge {
    background: #128C7E; color: white;
    border-radius: 10px; font-size: 11px;
    min-width: 18px; height: 18px;
    display: flex; align-items: center; justify-content: center;
    margin-left: 4px; flex-shrink: 0; padding: 0 5px;
    font-weight: bold;
}

.avatar {
    width: 42px; height: 42px; border-radius: 50%;
    background: #128C7E; color: white;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; font-size: 16px; flex-shrink: 0;
}
.avatar-img { width: 42px; height: 42px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }

.contact-actions { display: flex; align-items: center; padding-right: 8px; flex-shrink: 0; }
.block-btn { padding: 6px 8px; font-size: 16px; text-decoration: none; color: #bbb; transition: color 0.15s; }
.block-btn:hover { color: #e53935; }

/* ── WELCOME SCREEN ── */
.welcome-screen { flex: 1; display: flex; align-items: center; justify-content: center; background: #f0f2f5; }
.welcome-content { text-align: center; color: #999; }
.welcome-icon { font-size: 64px; margin-bottom: 16px; }
.welcome-content h2 { color: #128C7E; margin-bottom: 8px; }

/* ── CHAT AREA ── */
.chat-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-header {
    background: #128C7E; color: white; padding: 12px 20px;
    display: flex; align-items: center; gap: 12px;
    flex-shrink: 0;
}
.chat-username { font-weight: 600; font-size: 16px; flex: 1; }
.block-chat-btn { color: #ffcdd2; font-size: 13px; text-decoration: none; transition: color 0.15s; flex-shrink: 0; }
.block-chat-btn:hover { color: white; }
.unblock-chat-btn { color: #a5d6a7; font-size: 13px; text-decoration: none; transition: color 0.15s; flex-shrink: 0; }
.unblock-chat-btn:hover { color: white; }

/* ── MESSAGES ── */
.messages {
    flex: 1; overflow-y: auto; padding: 20px;
    display: flex; flex-direction: column; gap: 8px;
    background: #e5ddd5;
}
.message {
    max-width: 65%; padding: 8px 12px;
    border-radius: 8px; display: flex; flex-direction: column; gap: 4px;
    word-break: break-word;
}
.message.sent { align-self: flex-end; background: #dcf8c6; border-bottom-right-radius: 2px; }
.message.received { align-self: flex-start; background: white; border-bottom-left-radius: 2px; }
.sender { font-size: 11px; font-weight: bold; color: #128C7E; }
.text { font-size: 14px; color: #333; white-space: pre-wrap; }
.time { font-size: 10px; color: #999; align-self: flex-end; margin-top: 2px; }
.msg-image { max-width: 220px; border-radius: 8px; margin-top: 4px; cursor: pointer; display: block; }
.file-link { font-size: 13px; color: #128C7E; text-decoration: none; display: block; margin-top: 4px; }
.file-link:hover { text-decoration: underline; }

/* ── MESSAGE FORM ── */
.message-form {
    padding: 10px 16px; background: white;
    display: flex; gap: 8px; align-items: center;
    border-top: 1px solid #ddd; flex-shrink: 0;
}
.attach-btn { font-size: 22px; cursor: pointer; color: #666; flex-shrink: 0; line-height: 1; }
.attach-btn:hover { color: #128C7E; }
#fileNameLabel {
    font-size: 12px; color: #666;
    max-width: 80px; overflow: hidden;
    white-space: nowrap; text-overflow: ellipsis;
    flex-shrink: 0;
}
.message-form input[type="text"] {
    flex: 1; padding: 10px 16px;
    border: 1px solid #ddd; border-radius: 24px;
    font-size: 14px; outline: none;
    transition: border-color 0.2s;
}
.message-form input[type="text"]:focus { border-color: #128C7E; }
.message-form button {
    padding: 10px 20px; background: #128C7E;
    color: white; border: none; border-radius: 24px;
    cursor: pointer; font-size: 14px; flex-shrink: 0;
    transition: background 0.2s;
}
.message-form button:hover { background: #075E54; }

/* ── BLOCKED NOTICE ── */
.blocked-notice {
    padding: 14px 20px; background: #fff3e0; text-align: center;
    font-size: 13px; color: #e65100; border-top: 1px solid #ffe0b2;
    flex-shrink: 0;
}
.blocked-notice a { color: #128C7E; }