#skillup-chatbot-root {
    --chatbot-primary: oklch(0.55 0.18 250);
    --chatbot-bg: oklch(0.14 0.02 250);
    --chatbot-panel: oklch(0.18 0.02 250);
    --chatbot-border: oklch(0.28 0.02 250);
    --chatbot-text: oklch(0.95 0.01 250);
    --chatbot-muted: oklch(0.72 0.02 250);
    --chatbot-user: oklch(0.42 0.14 250);
    --chatbot-bot: oklch(0.22 0.02 250);
    position: fixed;
    inset: auto 1.25rem 1.25rem auto;
    z-index: 9999;
    font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

#skillup-chatbot-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 0;
    border-radius: 9999px;
    padding: 0.85rem 1.1rem;
    background: var(--chatbot-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#skillup-chatbot-toggle:hover {
    transform: translateY(-2px);
}

#skillup-chatbot-panel {
    position: absolute;
    right: 0;
    bottom: calc(100% + 0.75rem);
    width: min(24rem, calc(100vw - 2rem));
    height: min(32rem, calc(100vh - 6rem));
    display: none;
    flex-direction: column;
    border-radius: 1rem;
    border: 1px solid var(--chatbot-border);
    background: var(--chatbot-panel);
    color: var(--chatbot-text);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    overflow: hidden;
    animation: chatbot-slide-up 0.25s ease;
}

#skillup-chatbot-panel.is-open {
    display: flex;
}

@keyframes chatbot-slide-up {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chatbot-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--chatbot-border);
    background: linear-gradient(135deg, var(--chatbot-primary), oklch(0.45 0.16 250));
}

.chatbot-header-top {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.chatbot-header h2 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
}

.chatbot-role-badge {
    display: inline-flex;
    align-items: center;
    border-radius: 9999px;
    padding: 0.15rem 0.55rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.chatbot-role-badge--student {
    background: rgba(34, 197, 94, 0.35);
}

.chatbot-role-badge--instructor {
    background: rgba(59, 130, 246, 0.35);
}

.chatbot-role-badge--admin {
    background: rgba(251, 191, 36, 0.4);
}

.chatbot-header p {
    margin: 0.15rem 0 0;
    font-size: 0.75rem;
    opacity: 0.9;
}

.chatbot-close {
    border: 0;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    cursor: pointer;
}

.chatbot-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    scroll-behavior: smooth;
}

.chatbot-message {
    max-width: 92%;
    padding: 0.65rem 0.8rem;
    border-radius: 0.85rem;
    font-size: 0.85rem;
    line-height: 1.45;
    white-space: pre-wrap;
    word-break: break-word;
}

.chatbot-message.user {
    align-self: flex-end;
    background: var(--chatbot-user);
    color: #fff;
    border-bottom-right-radius: 0.2rem;
}

.chatbot-message.bot {
    align-self: flex-start;
    background: var(--chatbot-bot);
    border: 1px solid var(--chatbot-border);
    border-bottom-left-radius: 0.2rem;
}

.chatbot-typing {
    display: none;
    align-self: flex-start;
    font-size: 0.8rem;
    color: var(--chatbot-muted);
    padding: 0 0.25rem;
}

.chatbot-typing.is-visible {
    display: block;
}

.chatbot-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0 1rem 0.75rem;
}

.chatbot-suggestion {
    border: 1px solid var(--chatbot-border);
    background: transparent;
    color: var(--chatbot-text);
    border-radius: 9999px;
    padding: 0.35rem 0.65rem;
    font-size: 0.72rem;
    cursor: pointer;
}

.chatbot-suggestion:hover {
    border-color: var(--chatbot-primary);
    color: var(--chatbot-primary);
}

.chatbot-input-row {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem;
    border-top: 1px solid var(--chatbot-border);
    background: var(--chatbot-bg);
}

#skillup-chatbot-input {
    flex: 1;
    border: 1px solid var(--chatbot-border);
    background: var(--chatbot-panel);
    color: var(--chatbot-text);
    border-radius: 0.65rem;
    padding: 0.6rem 0.75rem;
    font-size: 0.85rem;
    outline: none;
}

#skillup-chatbot-input:focus {
    border-color: var(--chatbot-primary);
}

#skillup-chatbot-send {
    border: 0;
    border-radius: 0.65rem;
    padding: 0 0.9rem;
    background: var(--chatbot-primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

#skillup-chatbot-send:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 640px) {
    #skillup-chatbot-root {
        right: 0.75rem;
        bottom: 0.75rem;
    }

    #skillup-chatbot-panel {
        width: calc(100vw - 1.5rem);
        height: min(70vh, 28rem);
    }
}