/* ===== Design Tokens ===== */
:root {
    /* Primary palette */
    --color-primary: #2a5298;
    --color-primary-dark: #1e3a5f;
    --color-primary-light: #3b82f6;

    /* Backgrounds */
    --color-bg: #f5f7fa;
    --color-bg-white: #ffffff;
    --color-bg-user-bubble: #2a5298;
    --color-bg-assistant-bubble: #ffffff;
    --color-bg-error: #fef2f2;
    --color-bg-service-card: #f0f7ff;
    --color-bg-service-card-hover: #dbeafe;

    /* Text */
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #4b5563;
    --color-text-inverse: #ffffff;
    --color-text-error: #b91c1c;
    --color-text-link: #2563eb;

    /* Borders */
    --color-border: #dde1e6;
    --color-border-light: #e5e7eb;
    --color-border-error: #fca5a5;
    --color-border-focus: #3b82f6;

    /* Provider badges */
    --color-badge-borger-bg: #e0f2fe;
    --color-badge-borger-text: #0369a1;
    --color-badge-sundhed-bg: #dcfce7;
    --color-badge-sundhed-text: #15803d;
    --color-badge-default-bg: #f3f4f6;
    --color-badge-default-text: #4b5563;

    /* Typography */
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.5;

    /* Spacing & sizing */
    --max-width-conversation: 800px;
    --border-radius: 0.75rem;
    --transition-speed: 150ms;
    --animation-speed: 250ms;
}

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

html, body {
    height: 100%;
    font-family: var(--font-stack);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background: var(--color-bg);
}

body {
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.header {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: var(--color-text-inverse);
    padding: 0.75rem 1rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: var(--max-width-conversation);
    margin: 0 auto;
}

.header-nav {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.nav-link {
    color: var(--color-text-inverse);
    text-decoration: none;
    font-size: 0.8rem;
    padding: 0.35rem 0.65rem;
    border-radius: 0.4rem;
    opacity: 0.85;
    transition: opacity var(--transition-speed), background var(--transition-speed);
}

.nav-link:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.15);
}

.header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.9;
}

.header-text {
    display: flex;
    flex-direction: column;
}

.header-title {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.3;
}

.header-subtitle {
    font-size: 0.8rem;
    opacity: 0.85;
    line-height: 1.3;
}

/* ===== Main / Conversation ===== */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
}

#conversation {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* ===== Messages ===== */
.message {
    display: flex;
    max-width: 80%;
}

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

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

.message-error {
    align-self: center;
    max-width: 90%;
}

.bubble {
    padding: 0.6rem 0.9rem;
    border-radius: 0.75rem;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message-user .bubble {
    background: var(--color-bg-user-bubble);
    color: var(--color-text-inverse);
    border-bottom-right-radius: 0.2rem;
}

.message-assistant .bubble {
    background: var(--color-bg-assistant-bubble);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 0.2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.message-error .bubble {
    background: var(--color-bg-error);
    color: var(--color-text-error);
    border: 1px solid var(--color-border-error);
    font-size: 0.9rem;
}

/* ===== Assistant Label ===== */
.assistant-label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.3rem;
}

.assistant-icon {
    display: inline-flex;
    align-items: center;
}

.bubble-content {
    white-space: pre-wrap;
}

/* ===== Error Icon ===== */
.error-icon {
    margin-right: 0.3rem;
}

/* ===== Message Entrance Animation ===== */
@keyframes bubble-enter {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bubble-enter {
    animation: bubble-enter var(--animation-speed) ease-out;
}

/* ===== Citations ===== */
.citations {
    margin-top: 0.5rem;
    padding-top: 0.4rem;
    border-top: 1px solid #e5e7eb;
    font-size: 0.85rem;
}

.section-heading {
    font-weight: 600;
    color: #4b5563;
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.citations ul {
    list-style: none;
    padding: 0;
}

.citations li {
    margin-bottom: 0.2rem;
}

.citations a {
    color: #2563eb;
    text-decoration: none;
}

.citations a:hover {
    text-decoration: underline;
}

.citation-title {
    margin-right: 0.4rem;
}

.provider-badge {
    display: inline-block;
    padding: 0.1rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.72rem;
    font-weight: 600;
    vertical-align: middle;
}

.provider-borger {
    background: var(--color-badge-borger-bg);
    color: var(--color-badge-borger-text);
}

.provider-sundhed {
    background: var(--color-badge-sundhed-bg);
    color: var(--color-badge-sundhed-text);
}

.provider-default {
    background: var(--color-badge-default-bg);
    color: var(--color-badge-default-text);
}

/* ===== Self-Service Links ===== */
.self-service-links {
    margin-top: 0.5rem;
    padding-top: 0.4rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.service-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.7rem;
    background: var(--color-bg-service-card);
    border: 1px solid #bfdbfe;
    border-radius: 0.5rem;
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-card:hover {
    background: var(--color-bg-service-card-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.service-card:focus {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.service-card-content {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.service-card-title {
    color: #1d4ed8;
    font-size: 0.88rem;
}

.service-desc {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 0.1rem;
}

.service-card-arrow {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-left: 0.5rem;
    flex-shrink: 0;
}

/* ===== Typing Indicator ===== */
.typing-dots {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0;
}

.typing-dots span {
    display: block;
    width: 8px;
    height: 8px;
    background: var(--color-text-secondary);
    border-radius: 50%;
    animation: dot-pulse 1.4s infinite ease-in-out both;
}

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

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

@keyframes dot-pulse {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== Footer / Input Bar ===== */
.input-bar {
    flex-shrink: 0;
    background: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
    padding: 0.6rem 1rem;
    position: sticky;
    bottom: 0;
}

#chat-form {
    display: flex;
    gap: 0.5rem;
    max-width: var(--max-width-conversation);
    margin: 0 auto;
}

#message-input {
    flex: 1;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--color-border-light);
    border-radius: 1.5rem;
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

#message-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

#message-input:disabled {
    background: #f1f5f9;
}

#send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background: var(--color-primary-light);
    color: var(--color-text-inverse);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-speed), opacity var(--transition-speed);
}

#send-btn:hover {
    background: var(--color-primary);
}

#send-btn:focus {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

#send-btn:disabled {
    background: #93c5fd;
    cursor: not-allowed;
}

/* ===== Welcome State ===== */
.welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1rem;
    gap: 1rem;
}

.welcome-icon {
    color: var(--color-primary);
    opacity: 0.8;
}

.welcome-heading {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.welcome-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    max-width: 400px;
}

.suggested-prompts {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.prompt-chip {
    padding: 0.5rem 1rem;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: 2rem;
    font-size: 0.88rem;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.prompt-chip:hover {
    background: var(--color-bg-service-card);
    border-color: var(--color-primary-light);
}

.prompt-chip:focus {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

/* ===== Utility ===== */
.hidden {
    display: none;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    .message {
        max-width: 95%;
    }

    .service-card {
        width: 100%;
    }

    .header-title {
        font-size: 1rem;
    }

    #message-input {
        font-size: 0.9rem;
    }
}

@media (min-width: 769px) {
    #conversation {
        max-width: var(--max-width-conversation);
        margin: 0 auto;
        width: 100%;
    }
}