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

:root {
    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --surface2: #242424;
    --border: #333;
    --text: #e0e0e0;
    --text2: #999;
    --accent: #7c6fe0;
    --accent2: #9b8ff0;
    --user-bg: #2a2548;
    --ai-bg: #1e1e1e;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.container { max-width: 800px; margin: 0 auto; padding: 20px; }
.container-wide { max-width: 960px; margin: 0 auto; padding: 20px; }

/* Header */
.header {
    text-align: center;
    padding: 60px 20px 40px;
}
.header h1 { font-size: 2.4em; margin-bottom: 12px; }
.header .logo { font-size: 3em; margin-bottom: 8px; }
.header p { color: var(--text2); font-size: 1.1em; max-width: 500px; margin: 0 auto; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent2); }
.btn-secondary {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); }
.btn-small { padding: 8px 16px; font-size: 0.9em; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}
.card h3 { margin-bottom: 8px; }
.card .meta { color: var(--text2); font-size: 0.85em; }

/* Home page */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 40px 0;
}
.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
}
.feature-card .icon { font-size: 2em; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 8px; font-size: 1.1em; }
.feature-card p { color: var(--text2); font-size: 0.9em; }

.actions { text-align: center; margin: 40px 0; }
.actions .btn { margin: 0 8px; }

/* Chat */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 60px);
}
.chat-header {
    padding: 16px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.chat-header h2 { font-size: 1.1em; }
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}
.message {
    max-width: 80%;
    margin-bottom: 16px;
    padding: 12px 16px;
    border-radius: 12px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.message-user {
    background: var(--user-bg);
    margin-left: auto;
    border-bottom-right-radius: 4px;
}
.message-ai {
    background: var(--ai-bg);
    border: 1px solid var(--border);
    margin-right: auto;
    border-bottom-left-radius: 4px;
}
.chat-input-area {
    padding: 16px 20px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    gap: 12px;
}
.chat-input-area textarea {
    flex: 1;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    color: var(--text);
    font-size: 1em;
    resize: none;
    font-family: inherit;
    line-height: 1.5;
    min-height: 48px;
    max-height: 120px;
}
.chat-input-area textarea:focus { outline: none; border-color: var(--accent); }
.chat-input-area .btn { align-self: flex-end; }

/* Report / Markdown content */
.report-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    margin: 20px 0;
    line-height: 1.8;
}
.report-content h1 { font-size: 1.8em; margin: 24px 0 16px; }
.report-content h2 { font-size: 1.4em; margin: 24px 0 12px; color: var(--accent2); }
.report-content h3 { font-size: 1.15em; margin: 16px 0 8px; }
.report-content h4 { font-size: 1.05em; margin: 12px 0 8px; }
.report-content p { margin-bottom: 12px; }
.report-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 8px 16px;
    margin: 12px 0;
    color: var(--text2);
    background: var(--surface2);
    border-radius: 0 8px 8px 0;
}
.report-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.9em;
}
.report-content th, .report-content td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
}
.report-content th { background: var(--surface2); }
.report-content strong { color: #fff; }
.report-content hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.report-content ul, .report-content ol { padding-left: 24px; margin-bottom: 12px; }
.report-content li { margin-bottom: 4px; }

.report-actions {
    display: flex;
    gap: 12px;
    margin: 20px 0;
    flex-wrap: wrap;
}

/* Match page */
.select-group { margin-bottom: 20px; }
.select-group label { display: block; margin-bottom: 8px; color: var(--text2); }
.select-group select {
    width: 100%;
    padding: 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1em;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text2);
}
.loading::after {
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
}
.toast.show { opacity: 1; }

/* Nav */
.nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav .brand { font-weight: 600; font-size: 1.1em; }
.nav a { color: var(--text2); font-size: 0.9em; }
.nav a:hover { color: var(--text); text-decoration: none; }

/* Responsive */
@media (max-width: 600px) {
    .container { padding: 12px; }
    .header { padding: 40px 16px 24px; }
    .header h1 { font-size: 1.8em; }
    .features { grid-template-columns: 1fr; }
    .message { max-width: 90%; }
    .report-content { padding: 16px; }
    .chat-input-area { padding: 12px; }
    .report-actions { flex-direction: column; }
    .report-actions .btn { width: 100%; text-align: center; }
}