/* Tennis-Doctor — Chat Widget Styles */

:root {
    --td-primary: #2e7d32;
    --td-primary-dark: #1b5e20;
    --td-accent: #d4e157;
    --td-court: #1a472a;
    --td-clay: #c84b31;
    --td-bg: #fafdf7;
    --td-bg-card: #ffffff;
    --td-text: #1a1a1a;
    --td-text-muted: #666;
    --td-border: #e0e0e0;
    --td-user-bubble: #2e7d32;
    --td-bot-bubble: #f1f8e9;
    --td-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --td-radius: 12px;
}

[data-theme="dark"] {
    --td-bg: #0d1f0d;
    --td-bg-card: #1a2e1a;
    --td-text: #e8f5e9;
    --td-text-muted: #aaa;
    --td-border: #2d4a2d;
    --td-bot-bubble: #1a3a1a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--td-bg);
    color: var(--td-text);
    line-height: 1.6;
}

/* ---------- Layout ---------- */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px;
}

.td-nav {
    background: linear-gradient(135deg, var(--td-primary) 0%, var(--td-primary-dark) 100%);
    color: white;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--td-shadow);
}

.td-nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1em;
}

.td-nav-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

.td-nav-links a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    font-size: 0.95em;
    transition: color 0.2s;
}

.td-nav-links a:hover {
    color: var(--td-accent);
}

.lang-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background 0.2s;
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ---------- Hero / Landing ---------- */
.hero {
    text-align: center;
    padding: 60px 20px 40px;
}

.hero h1 {
    font-size: 3em;
    margin: 0 0 12px;
    background: linear-gradient(135deg, var(--td-primary) 0%, var(--td-clay) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .tagline {
    font-size: 1.3em;
    color: var(--td-text-muted);
    margin: 0 0 32px;
}

.hero .cta {
    display: inline-block;
    background: var(--td-primary);
    color: white;
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--td-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.hero .cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(46, 125, 50, 0.3);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin: 48px 0;
}

.feature-card {
    background: var(--td-bg-card);
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    padding: 24px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(46, 125, 50, 0.15);
}

.feature-card .icon {
    font-size: 2.4em;
    margin-bottom: 12px;
}

.feature-card h3 {
    margin: 0 0 8px;
    color: var(--td-primary);
}

.feature-card p {
    margin: 0;
    color: var(--td-text-muted);
    font-size: 0.95em;
}

/* ---------- Chat ---------- */
.chat-container {
    background: var(--td-bg-card);
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    box-shadow: var(--td-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 500px;
}

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

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--td-border);
    border-radius: 4px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 85%;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--td-primary);
    color: white;
}

.message.bot .message-avatar {
    background: var(--td-accent);
    color: var(--td-court);
}

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--td-radius);
    word-wrap: break-word;
}

.message.user .message-bubble {
    background: var(--td-user-bubble);
    color: white;
}

.message.bot .message-bubble {
    background: var(--td-bot-bubble);
    color: var(--td-text);
}

.message-bubble p {
    margin: 0 0 8px;
}

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

.message-bubble ul, .message-bubble ol {
    margin: 8px 0;
    padding-left: 20px;
}

.message-bubble code {
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;
    font-size: 0.9em;
}

.message.bot .message-bubble code {
    background: rgba(46, 125, 50, 0.1);
}

.message-bubble pre {
    background: var(--td-court);
    color: #e8f5e9;
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9em;
}

.message-bubble pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.sources {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--td-border);
    font-size: 0.85em;
    color: var(--td-text-muted);
}

.sources-toggle {
    background: none;
    border: none;
    color: var(--td-primary);
    cursor: pointer;
    padding: 4px 0;
    font-size: 0.9em;
    font-weight: 500;
}

.sources-toggle:hover {
    text-decoration: underline;
}

.sources-list {
    margin-top: 8px;
    list-style: none;
    padding: 0;
    display: none;
}

.sources-list.open {
    display: block;
}

.sources-list li {
    padding: 4px 0;
    border-bottom: 1px dotted var(--td-border);
}

.sources-list li:last-child {
    border-bottom: none;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    align-items: center;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--td-text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-4px); }
}

/* ---------- Input ---------- */
.chat-input-area {
    border-top: 1px solid var(--td-border);
    padding: 16px;
    background: var(--td-bg-card);
}

.chat-input-row {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    padding: 12px 16px;
    font-size: 1em;
    font-family: inherit;
    background: var(--td-bg);
    color: var(--td-text);
    resize: none;
    min-height: 50px;
    max-height: 150px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input:focus {
    border-color: var(--td-primary);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
}

.chat-send {
    background: var(--td-primary);
    color: white;
    border: none;
    border-radius: var(--td-radius);
    padding: 12px 20px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    height: 50px;
}

.chat-send:hover {
    background: var(--td-primary-dark);
}

.chat-send:disabled {
    background: var(--td-border);
    color: var(--td-text-muted);
    cursor: not-allowed;
}

.chat-suggestions {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.chat-suggestion {
    background: var(--td-bot-bubble);
    border: 1px solid var(--td-border);
    color: var(--td-text);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.9em;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.chat-suggestion:hover {
    background: var(--td-accent);
    border-color: var(--td-primary);
}

.welcome-message {
    text-align: center;
    color: var(--td-text-muted);
    padding: 24px;
    max-width: 500px;
    margin: auto;
}

.welcome-message h2 {
    color: var(--td-primary);
    margin: 0 0 12px;
}

/* ---------- Footer ---------- */
footer {
    text-align: center;
    padding: 32px 20px;
    color: var(--td-text-muted);
    font-size: 0.9em;
}

footer a {
    color: var(--td-primary);
}

/* ---------- Sample Q&A ---------- */
.sample-qa {
    margin: 48px 0;
}

.sample-qa h2 {
    text-align: center;
    margin-bottom: 24px;
}

.qa-item {
    background: var(--td-bg-card);
    border-left: 4px solid var(--td-primary);
    border-radius: 8px;
    padding: 16px 20px;
    margin-bottom: 16px;
    box-shadow: var(--td-shadow);
}

.qa-q {
    font-weight: 600;
    color: var(--td-primary-dark);
    margin-bottom: 8px;
}

.qa-a {
    color: var(--td-text);
    white-space: pre-wrap;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .hero h1 { font-size: 2.2em; }
    .hero .tagline { font-size: 1.1em; }
    .chat-container { height: calc(100vh - 140px); }
    .container { padding: 16px; }
}

/* ---------- Print ---------- */
@media print {
    .chat-input-area, .td-nav, footer { display: none; }
}