/* ==========================================================================
   Microsoft.AspNetCore.Components.AI — Design Tokens & Default Styles
   ========================================================================== */

/* ---------- Root scope ---------- */
.sc-ai-root {
    /* ---- Typography ---- */
    --sc-ai-font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --sc-ai-font-size: 0.9375rem;
    --sc-ai-font-size-sm: 0.8125rem;
    --sc-ai-font-size-lg: 1.125rem;
    --sc-ai-line-height: 1.5;
    --sc-ai-font-weight-normal: 400;
    --sc-ai-font-weight-medium: 500;
    --sc-ai-font-weight-bold: 600;

    /* ---- Colors — Surface & Background ---- */
    --sc-ai-color-bg: #ffffff;
    --sc-ai-color-surface: #ffffff;
    --sc-ai-color-surface-hover: #f8f9fa;
    --sc-ai-color-text: #212529;
    --sc-ai-color-text-secondary: #6c757d;
    --sc-ai-color-text-on-accent: #ffffff;
    --sc-ai-color-accent: #0d6efd;
    --sc-ai-color-accent-hover: #0b5ed7;
    --sc-ai-color-border: #dee2e6;
    --sc-ai-color-success: #198754;
    --sc-ai-color-error: #dc3545;
    --sc-ai-color-error-bg: #f8d7da;

    /* ---- Colors — Message Bubbles ---- */
    --sc-ai-color-bubble-user: #e9ecef;
    --sc-ai-color-bubble-user-text: #212529;
    --sc-ai-color-bubble-assistant: transparent;
    --sc-ai-color-bubble-assistant-text: #212529;

    /* ---- Layout & Spacing ---- */
    --sc-ai-spacing-xs: 0.25rem;
    --sc-ai-spacing-sm: 0.5rem;
    --sc-ai-spacing-md: 1rem;
    --sc-ai-spacing-lg: 1.5rem;
    --sc-ai-max-width: 48rem;
    --sc-ai-border-radius-sm: 0.375rem;
    --sc-ai-border-radius-lg: 1.5rem;
    --sc-ai-input-height: 3rem;

    /* ---- Transitions ---- */
    --sc-ai-transition-fast: 120ms ease;

    /* ---- Focus & States ---- */
    --sc-ai-focus-ring: 0 0 0 2px var(--sc-ai-color-accent);
    --sc-ai-disabled-opacity: 0.5;

    /* Apply base typography */
    font-family: var(--sc-ai-font-family);
    font-size: var(--sc-ai-font-size);
    line-height: var(--sc-ai-line-height);
    color: var(--sc-ai-color-text);
    box-sizing: border-box;
}

.sc-ai-root *,
.sc-ai-root *::before,
.sc-ai-root *::after {
    box-sizing: inherit;
}

/* ---------- Buttons ---------- */
.sc-ai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sc-ai-spacing-xs);
    padding: var(--sc-ai-spacing-sm) var(--sc-ai-spacing-md);
    border: 1px solid transparent;
    border-radius: var(--sc-ai-border-radius-sm);
    font-family: inherit;
    font-size: var(--sc-ai-font-size-sm);
    font-weight: var(--sc-ai-font-weight-medium);
    cursor: pointer;
    transition: background var(--sc-ai-transition-fast),
                color var(--sc-ai-transition-fast),
                border-color var(--sc-ai-transition-fast),
                opacity var(--sc-ai-transition-fast);
    line-height: 1;
}

.sc-ai-btn:focus-visible {
    outline: none;
    box-shadow: var(--sc-ai-focus-ring);
}

.sc-ai-btn:disabled {
    opacity: var(--sc-ai-disabled-opacity);
    cursor: not-allowed;
}

.sc-ai-btn--primary {
    background: var(--sc-ai-color-accent);
    color: var(--sc-ai-color-text-on-accent);
}

.sc-ai-btn--primary:hover:not(:disabled) {
    background: var(--sc-ai-color-accent-hover);
}

.sc-ai-btn--secondary {
    background: var(--sc-ai-color-surface);
    color: var(--sc-ai-color-text);
    border-color: var(--sc-ai-color-border);
}

.sc-ai-btn--secondary:hover:not(:disabled) {
    background: var(--sc-ai-color-surface-hover);
}

/* ---------- Message List ---------- */
.sc-ai-message-list {
    display: flex;
    flex-direction: column;
    gap: var(--sc-ai-spacing-md);
    max-width: var(--sc-ai-max-width);
    margin: 0 auto;
    padding: var(--sc-ai-spacing-lg);
    width: 100%;
}

.sc-ai-message-list__footer {
    min-height: var(--sc-ai-spacing-lg);
}

/* ---------- Turn ---------- */
.sc-ai-turn {
    display: flex;
    flex-direction: column;
    gap: var(--sc-ai-spacing-sm);
}

/* ---------- Message Bubbles ---------- */
.sc-ai-message {
    display: flex;
}

.sc-ai-message--user {
    justify-content: flex-end;
}

.sc-ai-message--assistant {
    justify-content: flex-start;
}

.sc-ai-message__bubble {
    max-width: 85%;
    padding: var(--sc-ai-spacing-sm) var(--sc-ai-spacing-md);
    border-radius: var(--sc-ai-border-radius-lg);
    word-break: break-word;
}

.sc-ai-message--user .sc-ai-message__bubble {
    background: var(--sc-ai-color-bubble-user);
    color: var(--sc-ai-color-bubble-user-text);
    border-bottom-right-radius: var(--sc-ai-border-radius-sm);
}

.sc-ai-message--assistant .sc-ai-message__bubble {
    background: var(--sc-ai-color-bubble-assistant);
    color: var(--sc-ai-color-bubble-assistant-text);
    border-bottom-left-radius: var(--sc-ai-border-radius-sm);
}

.sc-ai-message__content {
    white-space: pre-wrap;
}

.sc-ai-rich-text__paragraph,
.sc-ai-rich-text__heading,
.sc-ai-rich-text__quote,
.sc-ai-rich-text__list,
.sc-ai-rich-text__code-block,
.sc-ai-rich-text__table-container {
    margin-block: 0 0.75em;
}

.sc-ai-message__content > :last-child {
    margin-bottom: 0;
}

.sc-ai-rich-text__heading {
    line-height: 1.25;
}

.sc-ai-rich-text__inline-code,
.sc-ai-rich-text__code-block {
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    background: var(--sc-ai-color-surface-hover);
    border-radius: var(--sc-ai-border-radius-sm);
}

.sc-ai-rich-text__inline-code {
    padding: 0.1em 0.3em;
}

.sc-ai-rich-text__code-block {
    overflow-x: auto;
    padding: var(--sc-ai-spacing-sm);
}

.sc-ai-rich-text__quote {
    border-left: 0.25rem solid var(--sc-ai-color-border);
    padding-left: var(--sc-ai-spacing-md);
}

.sc-ai-rich-text__list-item > .sc-ai-rich-text__paragraph {
    display: inline;
}

.sc-ai-rich-text__table-container {
    overflow-x: auto;
}

.sc-ai-rich-text__table {
    border-collapse: collapse;
    width: 100%;
}

.sc-ai-rich-text__table td {
    border: 1px solid var(--sc-ai-color-border);
    padding: var(--sc-ai-spacing-xs) var(--sc-ai-spacing-sm);
}

.sc-ai-rich-text__table-cell--center {
    text-align: center;
}

.sc-ai-rich-text__table-cell--right {
    text-align: right;
}

/* Streaming cursor */
.sc-ai-message__content--streaming::after {
    content: "";
    display: inline-block;
    width: 2px;
    height: 1em;
    background: currentColor;
    margin-left: 1px;
    vertical-align: text-bottom;
    animation: sc-ai-blink 1s step-end infinite;
}

@keyframes sc-ai-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ---------- Approval ---------- */
.sc-ai-approval {
    border: 1px solid var(--sc-ai-color-border);
    border-radius: var(--sc-ai-border-radius-sm);
    padding: var(--sc-ai-spacing-md);
}

.sc-ai-approval__header {
    margin-bottom: var(--sc-ai-spacing-sm);
    font-weight: var(--sc-ai-font-weight-medium);
}

.sc-ai-approval__tool-name,
.sc-ai-approval__status {
    font-size: var(--sc-ai-font-size-sm);
}

.sc-ai-approval__tool-name {
    color: var(--sc-ai-color-text-secondary);
    margin-bottom: var(--sc-ai-spacing-sm);
}

.sc-ai-approval__arguments {
    overflow-x: auto;
    padding: var(--sc-ai-spacing-sm);
    background: var(--sc-ai-color-surface-hover);
    border-radius: var(--sc-ai-border-radius-sm);
}

.sc-ai-approval__actions {
    display: flex;
    gap: var(--sc-ai-spacing-sm);
}

.sc-ai-approval__status {
    font-weight: var(--sc-ai-font-weight-medium);
}

.sc-ai-approval__status--approved {
    color: var(--sc-ai-color-success);
}

.sc-ai-approval__status--rejected {
    color: var(--sc-ai-color-error);
}

/* ---------- Typing Indicator ---------- */
.sc-ai-typing {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: var(--sc-ai-spacing-sm) var(--sc-ai-spacing-md);
}

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

.sc-ai-typing__dot:nth-child(2) {
    animation-delay: 0.2s;
}

.sc-ai-typing__dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes sc-ai-bounce {
    0%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-6px); }
}

/* ---------- Error Banner ---------- */
.sc-ai-error {
    display: flex;
    align-items: center;
    gap: var(--sc-ai-spacing-sm);
    padding: var(--sc-ai-spacing-sm) var(--sc-ai-spacing-md);
    background: var(--sc-ai-color-error-bg);
    color: var(--sc-ai-color-error);
    border-radius: var(--sc-ai-border-radius-sm);
    font-size: var(--sc-ai-font-size-sm);
}

.sc-ai-error__message {
    flex: 1;
}

/* ---------- Message Input ---------- */
.sc-ai-input {
    display: flex;
    align-items: flex-end;
    gap: var(--sc-ai-spacing-sm);
    padding: var(--sc-ai-spacing-sm);
    background: var(--sc-ai-color-surface);
    border: 1px solid var(--sc-ai-color-border);
    border-radius: var(--sc-ai-border-radius-lg);
    transition: border-color var(--sc-ai-transition-fast);
}

.sc-ai-input:focus-within {
    border-color: var(--sc-ai-color-accent);
}

.sc-ai-input__body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sc-ai-input__textarea {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: inherit;
    line-height: var(--sc-ai-line-height);
    color: var(--sc-ai-color-text);
    background: transparent;
    min-height: var(--sc-ai-input-height);
    max-height: 10rem;
    padding: var(--sc-ai-spacing-sm);
}

.sc-ai-input__textarea::placeholder {
    color: var(--sc-ai-color-text-secondary);
}

.sc-ai-input__textarea:disabled {
    opacity: var(--sc-ai-disabled-opacity);
}

.sc-ai-input__send {
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--sc-ai-color-accent);
    color: var(--sc-ai-color-text-on-accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--sc-ai-transition-fast),
                opacity var(--sc-ai-transition-fast);
}

.sc-ai-input__send:hover:not(:disabled) {
    background: var(--sc-ai-color-accent-hover);
}

.sc-ai-input__send:focus-visible {
    outline: none;
    box-shadow: var(--sc-ai-focus-ring);
}

.sc-ai-input__send:disabled {
    opacity: var(--sc-ai-disabled-opacity);
    cursor: not-allowed;
}

.sc-ai-input__send svg {
    width: 1.125rem;
    height: 1.125rem;
}

/* ---------- Chat Page Shell ---------- */
.sc-ai-chat-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    background: var(--sc-ai-color-bg);
}

.sc-ai-chat-page__header {
    flex-shrink: 0;
}

.sc-ai-chat-page__body {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.sc-ai-chat-page__footer {
    flex-shrink: 0;
    border-top: 1px solid var(--sc-ai-color-border);
    background: var(--sc-ai-color-surface);
    padding: var(--sc-ai-spacing-md);
}

.sc-ai-chat-page__input-container {
    max-width: var(--sc-ai-max-width);
    margin: 0 auto;
}