/* ===================== Design Tokens (from site) ===================== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-accent: #38bdf8;

    --color-bg: #ffffff;
    --color-bg-soft: #f8f9fa;
    --color-bg-muted: #f1f5f9;
    --color-border: #e2e8f0;

    --color-text: #0f172a;
    --color-text-soft: #475569;
    --color-text-mute: #94a3b8;

    --bubble-user: #dbeafe;
    --bubble-ai: #f1f5f9;

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;

    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.16);

    --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
}

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

html, body {
    height: 100vh;
    width: 100vw;
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
}

/* ===================== Main Container ===================== */
.xkami-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    background: var(--color-bg);
    overflow: hidden;
}

/* ===================== Header ===================== */
.xkami-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    box-shadow: var(--shadow-sm);
}

.xkami-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

.xkami-subtitle {
    font-size: 13px;
    opacity: 0.9;
    font-weight: 400;
}

/* ===================== Chat Frame ===================== */
.xkami-chat-frame {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    background: var(--color-bg);
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* Message */
.message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
    word-wrap: break-word;
}

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

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

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

.message-user .message-content {
    background: var(--bubble-user);
    color: var(--color-text);
    border: 1px solid var(--color-primary);
}

.message-assistant .message-content {
    background: var(--bubble-ai);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.message-error .message-content {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.message-sources,
.message-disclaimer {
    font-size: 12px;
    color: var(--color-text-mute);
    margin-top: var(--space-sm);
    padding: 0 var(--space-md);
    font-style: italic;
}

.message-disclaimer {
    color: var(--color-primary);
    margin-top: var(--space-xs);
}

/* ===================== Parcel Info ===================== */
.parcel-info {
    padding: var(--space-md) var(--space-lg);
    background: #fef3c7;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.parcel-label {
    font-weight: 600;
    color: var(--color-text);
}

.parcel-details {
    color: var(--color-text-soft);
}

/* ===================== Samples Section ===================== */
.samples-section {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-soft);
}

.samples-label {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    margin-bottom: var(--space-md);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-sm);
}

.sample-btn {
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms ease;
}

.sample-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-muted);
}

.sample-btn.active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: white;
}

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

/* ===================== Input Section ===================== */
.input-section {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.mode-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    font-size: 12px;
    color: var(--color-text-soft);
}

.mode-label {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.remaining {
    font-weight: 500;
}

.input-group {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.message-input {
    flex: 1;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    transition: all 150ms ease;
}

.message-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.message-input::placeholder {
    color: var(--color-text-mute);
}

.send-btn {
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 150ms ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
}

.send-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.send-btn:active {
    transform: translateY(0);
}

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

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.send-icon {
    font-size: 16px;
    font-weight: 800;
}

.disclaimer-notice {
    font-size: 12px;
    color: var(--color-text-mute);
    font-style: italic;
}

/* ===================== Status Badge ===================== */
.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-active {
    background: #d1fae5;
    color: #065f46;
}

.status-demo {
    background: #e0e7ff;
    color: #3730a3;
}

.status-local {
    background: #fef3c7;
    color: #92400e;
}

.status-plan {
    background: #f3e8ff;
    color: #6b21a8;
}

/* ===================== Responsive ===================== */
/* Tablet (768px) */
@media (max-width: 768px) {
    .xkami-header {
        padding: var(--space-md);
    }

    .xkami-title {
        font-size: 22px;
    }

    .xkami-chat-frame {
        padding: var(--space-md);
    }

    .message {
        max-width: 95%;
    }

    .samples-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .input-section {
        padding: var(--space-md);
    }
}

/* Mobile (480px) */
@media (max-width: 480px) {
    .xkami-container {
        height: 100dvh; /* Dynamic viewport height */
    }

    .xkami-header {
        padding: var(--space-sm) var(--space-md);
    }

    .xkami-title {
        font-size: 18px;
        margin-bottom: var(--space-xs);
    }

    .xkami-subtitle {
        font-size: 11px;
    }

    .xkami-chat-frame {
        padding: var(--space-sm);
    }

    .message {
        max-width: 100%;
    }

    .message-content {
        padding: var(--space-sm);
        font-size: 13px;
    }

    .message-sources,
    .message-disclaimer {
        font-size: 11px;
        padding: 0 var(--space-sm);
    }

    .parcel-info {
        padding: var(--space-sm);
        font-size: 12px;
        flex-wrap: wrap;
    }

    .samples-section {
        padding: var(--space-md);
    }

    .samples-label {
        font-size: 12px;
    }

    .samples-grid {
        grid-template-columns: repeat(auto-fit, minmax(85px, 1fr));
        gap: var(--space-xs);
    }

    .sample-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 12px;
    }

    .input-section {
        padding: var(--space-sm);
    }

    .mode-info {
        margin-bottom: var(--space-sm);
        font-size: 11px;
    }

    .input-group {
        gap: var(--space-xs);
        margin-bottom: var(--space-sm);
    }

    .message-input {
        padding: var(--space-sm) var(--space-md);
        font-size: 13px;
    }

    .send-btn {
        padding: var(--space-sm) var(--space-md);
        min-width: 44px;
    }

    .disclaimer-notice {
        font-size: 11px;
        line-height: 1.4;
    }
}

/* ===================== Accessibility ===================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Ensure sufficient color contrast */
.message-content {
    color: var(--color-text);
}

.send-btn:focus-visible,
.sample-btn:focus-visible,
.message-input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Touch targets */
.send-btn,
.sample-btn {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}