:root {
    --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #e94560;
    --accent-secondary: #533483;
    --success: #00d2d3;
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.app-container { width: 100%; max-width: 800px; height: 90vh; display: flex; flex-direction: column; gap: 20px; }

header {
    text-align: center; padding: 20px;
    background: var(--glass-bg); backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border); border-radius: 20px; box-shadow: var(--shadow);
}
header h1 { font-size: 2.5rem; background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 5px; }
header p { color: var(--text-secondary); font-size: 1.1rem; }

.chat-container {
    flex: 1; display: flex; flex-direction: column;
    background: var(--glass-bg); backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border); border-radius: 20px; box-shadow: var(--shadow); overflow: hidden;
}

.status-bar { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; background: rgba(0, 0, 0, 0.2); border-bottom: 1px solid var(--glass-border); }
#status-text { font-size: 1.2rem; font-weight: 600; color: var(--success); }
.controls { display: flex; gap: 10px; }

.btn {
    padding: 10px 20px; border: none; border-radius: 50px; font-size: 1rem; font-weight: 600;
    cursor: pointer; transition: all 0.3s ease; display: flex; align-items: center; gap: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.btn:not(:disabled):hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3); }
.btn-primary { background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); color: white; }
.btn-danger { background: linear-gradient(135deg, #ff6b6b, #ee5253); color: white; }
.btn-secondary { background: rgba(255, 255, 255, 0.1); color: white; border: 1px solid var(--glass-border); }

.messages { flex: 1; padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 15px; scroll-behavior: smooth; }
.messages::-webkit-scrollbar { width: 8px; }
.messages::-webkit-scrollbar-track { background: rgba(0, 0, 0, 0.1); }
.messages::-webkit-scrollbar-thumb { background: var(--accent-secondary); border-radius: 10px; }

.message { max-width: 70%; padding: 12px 18px; border-radius: 18px; font-size: 1rem; line-height: 1.4; word-wrap: break-word; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.message.self { align-self: flex-end; background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); color: white; border-bottom-right-radius: 4px; }
.message.partner { align-self: flex-start; background: rgba(255, 255, 255, 0.1); color: var(--text-primary); border-bottom-left-radius: 4px; border: 1px solid var(--glass-border); }
.message.system { align-self: center; background: rgba(0, 210, 211, 0.1); color: var(--success); font-size: 0.9rem; font-style: italic; border: 1px solid rgba(0, 210, 211, 0.3); max-width: 90%; text-align: center; }

.input-area { display: flex; padding: 15px; background: rgba(0, 0, 0, 0.2); border-top: 1px solid var(--glass-border); gap: 10px; }
#message-input { flex: 1; padding: 12px 20px; border: none; border-radius: 50px; background: rgba(255, 255, 255, 0.1); color: white; font-size: 1rem; outline: none; border: 1px solid var(--glass-border); transition: all 0.3s ease; }
#message-input:focus { background: rgba(255, 255, 255, 0.15); border-color: var(--accent-primary); }
#message-input::placeholder { color: var(--text-secondary); }
#btn-send { width: 50px; height: 50px; border-radius: 50%; justify-content: center; padding: 0; }

/* Modal */
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.8); backdrop-filter: blur(5px); justify-content: center; align-items: center; z-index: 1000; }
.modal.show { display: flex; }
.modal-content { background: var(--glass-bg); backdrop-filter: blur(20px); border: 1px solid var(--glass-border); border-radius: 20px; padding: 40px; text-align: center; max-width: 500px; width: 90%; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 20px; }
.modal-content h2 { color: var(--accent-primary); font-size: 2rem; }
.modal-content p { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.6; }
.modal-content .btn { width: 100%; justify-content: center; padding: 15px; font-size: 1.1rem; }

/* Admin Page Styles */
.admin-container { width: 100%; max-width: 600px; background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 20px; padding: 30px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 20px; }
.admin-container h2 { text-align: center; color: var(--accent-primary); }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-weight: 600; color: var(--text-secondary); }
.form-group input, .form-group textarea { padding: 12px; border-radius: 10px; background: rgba(255, 255, 255, 0.05); border: 1px solid var(--glass-border); color: white; font-size: 1rem; outline: none; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent-primary); }

@media (max-width: 600px) {
    header h1 { font-size: 2rem; }
    .message { max-width: 85%; }
    .status-bar { flex-direction: column; gap: 10px; }
}