:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent-glow: rgba(99, 102, 241, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.15) 0, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 900px;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

p.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.chat-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.chat-history {
    height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-right: 0.5rem;
}

.chat-history::-webkit-scrollbar {
    width: 6px;
}

.chat-history::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 10px;
}

.message {
    padding: 1rem;
    border-radius: 1rem;
    max-width: 85%;
    line-height: 1.5;
}

.user-message {
    background: var(--primary-color);
    align-self: flex-end;
    border-bottom-right-radius: 0.2rem;
}

.bot-message {
    background: rgba(51, 65, 85, 0.5);
    align-self: flex-start;
    border-bottom-left-radius: 0.2rem;
    border: 1px solid var(--glass-border);
}

.bot-message p {
    margin-bottom: 0.5rem;
}

.bot-message p:last-child {
    margin-bottom: 0;
}

.bot-message ul,
.bot-message ol {
    margin-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.bot-message li {
    margin-bottom: 0.25rem;
}

.input-group {
    display: flex;
    gap: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.5rem;
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
}

input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-main);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    outline: none;
}

button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px var(--accent-glow);
}

.sources {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--glass-border);
    padding-top: 0.5rem;
}

.source-tag {
    display: inline-block;
    background: rgba(99, 102, 241, 0.15);
    padding: 0.2rem 0.6rem;
    border-radius: 0.4rem;
    margin-right: 0.5rem;
    margin-top: 0.5rem;
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
}

.suggestions {
    margin: 0.5rem 0;
}

.suggestions p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    width: auto;
}

.chip:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading-dots:after {
    content: '...';
    display: inline-block;
    width: 0;
    animation: dots 1.5s steps(4, end) infinite;
    overflow: hidden;
    vertical-align: bottom;
}

@keyframes dots {
    to {
        width: 1.25em;
    }
}