/* ==========================================================================
   Sage UI – Styles
   ========================================================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-navy:        #1a1a2e;
    --color-navy-light:  #25253e;
    --color-navy-dark:   #12121f;
    --color-accent:      #4a6cf7;
    --color-accent-hover:#3b5de7;
    --color-white:       #ffffff;
    --color-bg:          #f4f5f7;
    --color-card-bg:     #ffffff;
    --color-text:        #333333;
    --color-text-muted:  #6b7280;
    --color-border:      #e2e5e9;
    --color-error:       #e74c3c;
    --color-success:     #27ae60;
    --color-disabled-bg: #ebedef;
    --color-disabled-text:#9ca3af;
    --color-badge-bg:    #f59e0b;
    --color-badge-text:  #ffffff;

    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg: 12px;

    --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:  0 4px 12px rgba(0,0,0,0.10);
    --shadow-lg:  0 8px 24px rgba(0,0,0,0.12);

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    --header-height: 56px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

#app {
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

/* --- Utility: Screen visibility --- */
.screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-navy);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
}

.brand {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-username {
    font-size: 14px;
    opacity: 0.85;
}

/* When header is visible, push content down */
.screen.with-header {
    padding-top: var(--header-height);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: 10px 20px;
    transition: background var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-sm);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-block {
    width: 100%;
}

.btn-sign-out {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 6px 14px;
    font-size: 13px;
}

.btn-sign-out:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

/* ==========================================================================
   Login Screen
   ========================================================================== */
.login-screen {
    background: var(--color-bg);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 40px 32px;
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.login-brand {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-navy);
    letter-spacing: 1px;
}

.login-tagline {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* --- Form --- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

.login-error {
    background: rgba(231, 76, 60, 0.08);
    color: var(--color-error);
    font-size: 13px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    text-align: center;
}

.login-form .btn-primary {
    margin-top: 4px;
    padding: 12px;
    font-size: 15px;
}

/* ==========================================================================
   Agent Selector Screen
   ========================================================================== */
.selector-screen {
    background: var(--color-bg);
    align-items: flex-start;
    justify-content: center;
    padding-top: calc(var(--header-height) + 48px);
}

.selector-container {
    width: 100%;
    max-width: 840px;
    padding: 0 24px;
}

.selector-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
}

.selector-subtitle {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.agent-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

/* --- Agent Card --- */
.agent-card {
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    position: relative;
    cursor: pointer;
}

.agent-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.agent-card:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.agent-card.disabled {
    background: var(--color-disabled-bg);
    border-color: var(--color-border);
    cursor: not-allowed;
    opacity: 0.7;
}

.agent-card.disabled:hover {
    border-color: var(--color-border);
    box-shadow: none;
    transform: none;
}

.agent-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
}

.agent-card-icon.active {
    background: rgba(74, 108, 247, 0.12);
    color: var(--color-accent);
}

.agent-card-icon.disabled {
    background: rgba(0,0,0,0.05);
    color: var(--color-disabled-text);
}

.agent-card-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
}

.agent-card.disabled .agent-card-name {
    color: var(--color-disabled-text);
}

.agent-card-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.45;
    margin-bottom: 16px;
}

.agent-card-status {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
}

.agent-card-status.active {
    background: rgba(39, 174, 96, 0.1);
    color: var(--color-success);
}

.agent-card-status.coming-soon {
    background: rgba(245, 158, 11, 0.12);
    color: var(--color-badge-bg);
}

/* ==========================================================================
   Chat Screen
   ========================================================================== */
.chat-screen {
    padding-top: var(--header-height);
    flex-direction: column;
    align-items: stretch;
    justify-content: stretch;
}

/* --- Chat Header Bar --- */
.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.btn-back {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-md);
}

.btn-back:hover {
    background: rgba(74, 108, 247, 0.06);
}

.chat-agent-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-navy);
}

/* --- Messages Area --- */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 24px 12px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

/* --- Message Bubbles --- */
.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: messageFadeIn 200ms ease;
}

@keyframes messageFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

.message-assistant {
    align-self: flex-start;
}

.message-content {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message-user .message-content {
    background: var(--color-accent);
    color: var(--color-white);
    border-bottom-right-radius: var(--radius-sm);
}

.message-assistant .message-content {
    background: var(--color-white);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: var(--radius-sm);
}

/* --- Typing Indicator --- */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 0;
}

.typing-indicator .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-text-muted);
    animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-indicator .dot:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator .dot:nth-child(3) {
    animation-delay: 0.3s;
}

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

/* --- Context Condensed Notice --- */
.context-condensed-notice {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
    padding: 4px 12px;
    background: rgba(74, 108, 247, 0.06);
    border-radius: 999px;
    align-self: center;
}

/* --- Inference Label --- */
.inference-label {
    display: inline;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-badge-bg);
    background: rgba(245, 158, 11, 0.12);
    padding: 1px 6px;
    border-radius: var(--radius-sm);
    vertical-align: middle;
}

/* --- Citations Panel --- */
.citations-panel {
    margin-top: 8px;
}

.citations-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.citations-toggle:hover {
    color: var(--color-accent-hover);
}

.citations-list {
    display: none;
    margin-top: 6px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.citation-item {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    gap: 12px;
    align-items: center;
    padding: 8px 12px;
    font-size: 12px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.citation-item:last-child {
    border-bottom: none;
}

.citation-source {
    font-weight: 600;
    color: var(--color-navy);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.citation-timestamp {
    color: var(--color-text-muted);
    font-family: monospace;
    font-size: 11px;
}

.citation-topic {
    color: var(--color-text-muted);
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.confidence-bar {
    display: flex;
    align-items: center;
    gap: 4px;
}

.confidence-bar-track {
    width: 40px;
    height: 6px;
    border-radius: 3px;
    background: var(--color-border);
    overflow: hidden;
}

.confidence-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width var(--transition-base);
}

.confidence-bar-fill.high    { background: var(--color-success); }
.confidence-bar-fill.medium  { background: var(--color-badge-bg); }
.confidence-bar-fill.low     { background: var(--color-error); }

.confidence-bar-label {
    font-size: 11px;
    color: var(--color-text-muted);
    min-width: 28px;
    text-align: right;
}

/* --- Feedback Controls --- */
.feedback-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
}

.feedback-btn {
    background: none;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), border-color var(--transition-fast);
    opacity: 0.5;
    line-height: 1;
}

.feedback-btn:hover {
    opacity: 1;
    background: var(--color-bg);
    border-color: var(--color-border);
}

.feedback-btn.active {
    opacity: 1;
    border-color: var(--color-accent);
    background: rgba(74, 108, 247, 0.08);
}

.feedback-btn:disabled {
    cursor: default;
    opacity: 0.4;
}

.feedback-submitted {
    font-size: 12px;
    color: var(--color-success);
    font-weight: 600;
    margin-left: 4px;
}

/* --- Feedback Detail Panel --- */
.feedback-detail {
    display: none;
    margin-top: 8px;
    padding: 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: messageFadeIn 150ms ease;
}

.feedback-detail.open {
    display: block;
}

.feedback-detail label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.feedback-detail select {
    width: 100%;
    padding: 8px 10px;
    font-size: 13px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    color: var(--color-text);
    margin-bottom: 10px;
}

.feedback-detail textarea {
    width: 100%;
    padding: 8px 10px;
    font-size: 13px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    color: var(--color-text);
    resize: vertical;
    min-height: 60px;
    margin-bottom: 10px;
    font-family: inherit;
}

.feedback-detail textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.feedback-detail .btn {
    font-size: 13px;
    padding: 8px 16px;
}

/* --- Error Message --- */
.message-error .message-content {
    background: rgba(231, 76, 60, 0.08);
    color: var(--color-error);
    border-color: rgba(231, 76, 60, 0.2);
}

/* --- Chat Input Area --- */
.chat-input-area {
    flex-shrink: 0;
    padding: 12px 24px 16px;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.chat-form {
    display: flex;
    gap: 10px;
    max-width: 900px;
    margin: 0 auto;
}

.chat-input {
    flex: 1;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
    background: var(--color-white);
}

.chat-send-btn {
    padding: 12px 24px;
    font-size: 15px;
    white-space: nowrap;
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
/* ==========================================================================
   Structured Output
   ========================================================================== */

/* --- Generate Output Button --- */
.generate-output-btn {
    background: none;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
    margin-top: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.generate-output-btn:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

/* --- Format Selector --- */
.format-selector {
    display: none;
    margin-top: 8px;
    padding: 10px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: messageFadeIn 150ms ease;
}

.format-selector.open {
    display: block;
}

.format-selector-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    display: block;
}

.format-selector-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.format-btn {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.format-btn:hover {
    background: rgba(74, 108, 247, 0.06);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.format-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Structured Output Message --- */
.structured-output-wrapper {
    position: relative;
}

.structured-output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.structured-output-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-accent);
}

.copy-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.copy-btn:hover {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-accent);
}

.copy-btn.copied {
    color: var(--color-success);
    border-color: var(--color-success);
}

/* ==========================================================================
   Corrections Review Screen
   ========================================================================== */
.corrections-screen {
    background: var(--color-bg);
    align-items: flex-start;
    justify-content: center;
    padding-top: calc(var(--header-height) + 32px);
}

.corrections-container {
    width: 100%;
    max-width: 960px;
    padding: 0 24px;
}

.corrections-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.corrections-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-navy);
}

.corrections-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.corrections-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-muted);
    font-size: 15px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.correction-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.correction-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.correction-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--color-text-muted);
}

.correction-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.correction-actions {
    display: flex;
    gap: 8px;
}

.correction-approve-btn {
    background: var(--color-success);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    transition: opacity var(--transition-fast);
}

.correction-approve-btn:hover {
    opacity: 0.85;
}

.correction-approve-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.correction-dismiss-btn {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.correction-dismiss-btn:hover {
    background: var(--color-bg);
    color: var(--color-error);
}

.correction-dismiss-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.correction-body {
    font-size: 14px;
    line-height: 1.6;
}

.correction-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.correction-text {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 12px;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 13px;
    line-height: 1.5;
}

.correction-text:last-child {
    margin-bottom: 0;
}

/* --- Header nav link --- */
.header-nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.header-nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 600px) {
    .login-container {
        margin: 16px;
        padding: 28px 20px;
    }

    .agent-cards {
        grid-template-columns: 1fr;
    }

    .selector-screen {
        padding-top: calc(var(--header-height) + 24px);
    }

    .message {
        max-width: 92%;
    }

    .chat-messages {
        padding: 16px 12px 8px;
    }

    .chat-input-area {
        padding: 10px 12px 12px;
    }

    .chat-header {
        padding: 8px 12px;
    }

    .citation-item {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }
}