:root {
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle at top left, #1e1b4b, #0f172a);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
}

.app-container {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

header {
    text-align: center;
}

header h1 {
    font-weight: 600;
    font-size: 2rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 0.5rem;
}

.upload-area {
    border: 2px dashed var(--panel-border);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
}

.status-text {
    font-size: 0.9rem;
    text-align: center;
}

.chat-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-history {
    max-height: 300px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    padding-right: 0.5rem;
}

.message {
    padding: 0.8rem 1rem;
    border-radius: 12px;
    max-width: 80%;
    font-size: 0.95rem;
    line-height: 1.4;
}

.message.system {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.message.user {
    align-self: flex-end;
    background: var(--accent);
    color: white;
}

.message.ai {
    align-self: flex-start;
    background: rgba(167, 139, 250, 0.2);
    border: 1px solid rgba(167, 139, 250, 0.3);
}

.chat-input-area {
    display: flex;
    gap: 0.5rem;
}

input[type="text"] {
    flex: 1;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    border-color: var(--accent);
}

.btn {
    border: none;
    border-radius: 8px;
    padding: 0.8rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

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

.btn.success {
    background: var(--success);
    color: white;
}

.btn.danger {
    background: var(--danger);
    color: white;
}

.table-container {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.5rem;
}

th, td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--panel-border);
}

th {
    color: var(--text-muted);
    font-weight: 600;
}

.actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.hidden {
    display: none !important;
}