:root {
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --error-color: #ef4444;
    --success-color: #10b981;
    --user-msg-bg: #3b82f6;
    --agent-msg-bg: rgba(51, 65, 85, 0.8);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Dynamic Background Animation */
.background-animation {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 40%);
    z-index: -1;
    animation: pulseBg 15s ease-in-out infinite alternate;
}

@keyframes pulseBg {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.1) translate(-2%, 2%); }
}

.app-container {
    width: 100%;
    max-width: 900px;
    height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .app-container {
        height: 90vh;
        max-height: 800px;
    }
}

/* Views */
.view {
    display: none;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.view.active {
    display: flex;
    opacity: 1;
}

/* Glassmorphism Panel for Auth */
#auth-view {
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    color: var(--accent-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.glass-panel h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

/* Forms */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    outline: none;
}

input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.primary-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

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

.primary-btn:active {
    transform: scale(0.98);
}

.error-msg {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 12px;
    text-align: center;
    min-height: 20px;
}

/* Chat Interface */
#chat-view {
    flex-direction: column;
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin: 20px;
}

@media (max-width: 767px) {
    #chat-view {
        margin: 0;
        border-radius: 0;
        border: none;
    }
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--panel-border);
    background: rgba(15, 23, 42, 0.4);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
}

.chat-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
}

.icon-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.message {
    display: flex;
    max-width: 85%;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.user {
    align-self: flex-end;
}

.message.system, .message.agent {
    align-self: flex-start;
}

.message-content {
    padding: 12px 16px;
    border-radius: 16px;
    line-height: 1.5;
    font-size: 0.95rem;
    word-wrap: break-word;
}

.message.user .message-content {
    background: var(--user-msg-bg);
    border-bottom-right-radius: 4px;
}

.message.system .message-content, .message.agent .message-content {
    background: var(--agent-msg-bg);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--panel-border);
}

.chat-input-area {
    padding: 16px 24px;
    background: rgba(15, 23, 42, 0.6);
    border-top: 1px solid var(--panel-border);
    display: flex;
    gap: 12px;
}

.chat-input-area input {
    flex: 1;
    background: rgba(30, 41, 59, 0.8);
    border-radius: 20px;
    padding: 14px 20px;
}

.chat-input-area .primary-btn {
    width: auto;
    border-radius: 50%;
    padding: 14px;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 8px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}