/* ==========================================================================
   AASTU Social Science Department - Free FAQ Chatbot Widget
   File: chatbot.css
   Style rules for the floating launcher, chat window, messages, and quick replies.
   Completely self-contained with no external library dependencies.
   ========================================================================== */

/* Root Chatbot Container & Resets */
#aastu-chatbot-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99999;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans Ethiopic', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #0f172a;
    -webkit-font-smoothing: antialiased;
    box-sizing: border-box;
}

#aastu-chatbot-container * {
    box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   1. Floating Launcher Button
   -------------------------------------------------------------------------- */
#aastu-chat-toggle-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1d4ed8 0%, #0f172a 100%);
    border: none;
    box-shadow: 0 8px 24px rgba(29, 78, 216, 0.35), 0 2px 8px rgba(15, 23, 42, 0.15);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
    outline: none;
    position: relative;
    user-select: none;
}

#aastu-chat-toggle-btn:hover {
    transform: scale(1.06);
    box-shadow: 0 12px 28px rgba(29, 78, 216, 0.45), 0 4px 12px rgba(15, 23, 42, 0.2);
}

#aastu-chat-toggle-btn:active {
    transform: scale(0.96);
}

/* Pulsing Notification Badge */
.aastu-chat-pulse-badge {
    position: absolute;
    top: 0;
    right: 0;
    width: 15px;
    height: 15px;
    background-color: #10b981;
    border: 2.5px solid #ffffff;
    border-radius: 50%;
    animation: aastuPulse 2s infinite;
}

@keyframes aastuPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Launcher Icon Switching */
.aastu-icon-open,
.aastu-icon-close {
    transition: opacity 0.2s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.aastu-icon-close {
    display: none;
}

#aastu-chatbot-container.active .aastu-icon-open {
    display: none;
}

#aastu-chatbot-container.active .aastu-icon-close {
    display: flex;
}

/* Floating Greeting Pill */
#aastu-chat-greeting-pill {
    position: absolute;
    bottom: 72px;
    right: 0;
    background: #ffffff;
    color: #0f172a;
    padding: 9px 14px;
    border-radius: 20px 20px 4px 20px;
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.12);
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid #e2e8f0;
    cursor: pointer;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: auto;
    z-index: 10;
}

#aastu-chat-greeting-pill:hover {
    background: #f8fafc;
}

#aastu-chat-greeting-pill.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
}

/* --------------------------------------------------------------------------
   2. Chat Window Box
   -------------------------------------------------------------------------- */
#aastu-chat-window {
    position: absolute;
    bottom: 76px;
    right: 0;
    width: 380px;
    max-width: calc(100vw - 32px);
    height: 560px;
    max-height: calc(100vh - 110px);
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 16px 40px -6px rgba(15, 23, 42, 0.22), 0 2px 10px rgba(15, 23, 42, 0.08);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95) translateY(12px);
    transform-origin: bottom right;
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.25s;
}

#aastu-chatbot-container.active #aastu-chat-window {
    opacity: 1;
    visibility: visible;
    transform: scale(1) translateY(0);
}

/* --------------------------------------------------------------------------
   3. Chat Header
   -------------------------------------------------------------------------- */
.aastu-chat-header {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #ffffff;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 256, 0.08);
    flex-shrink: 0;
}

.aastu-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.aastu-header-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #1d4ed8;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    flex-shrink: 0;
}

.aastu-header-text h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.01em;
}

.aastu-header-text p {
    margin: 2px 0 0;
    font-size: 11px;
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 5px;
}

.aastu-online-indicator {
    width: 7px;
    height: 7px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
}

.aastu-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Language Switcher Button */
.aastu-lang-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.aastu-lang-btn:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.35);
}

.aastu-close-btn {
    background: transparent;
    border: none;
    color: #cbd5e1;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: color 0.2s ease, background 0.2s ease;
}

.aastu-close-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   4. Chat Body & Messages Area
   -------------------------------------------------------------------------- */
.aastu-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: #f8fafc;
    scroll-behavior: smooth;
}

.aastu-chat-messages::-webkit-scrollbar {
    width: 5px;
}

.aastu-chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

/* Message Rows */
.aastu-msg-row {
    display: flex;
    flex-direction: column;
    max-width: 86%;
    animation: aastuMsgFadeIn 0.25s ease-out;
}

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

.aastu-msg-bot {
    align-self: flex-start;
}

.aastu-msg-user {
    align-self: flex-end;
}

/* Message Bubbles */
.aastu-bubble {
    padding: 11px 15px;
    font-size: 13.5px;
    line-height: 1.5;
    word-break: break-word;
}

.aastu-msg-bot .aastu-bubble {
    background: #ffffff;
    color: #1e293b;
    border: 1px solid #e2e8f0;
    border-radius: 16px 16px 16px 4px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.aastu-msg-user .aastu-bubble {
    background: #1d4ed8;
    color: #ffffff;
    border-radius: 16px 16px 4px 16px;
    box-shadow: 0 2px 6px rgba(29, 78, 216, 0.2);
}

/* Bubble Content Elements */
.aastu-bubble p {
    margin: 0 0 6px;
}

.aastu-bubble p:last-child {
    margin-bottom: 0;
}

.aastu-bubble strong {
    font-weight: 700;
    color: #0f172a;
}

.aastu-msg-user .aastu-bubble strong {
    color: #ffffff;
}

.aastu-bubble ul {
    margin: 6px 0;
    padding-left: 18px;
}

.aastu-bubble li {
    margin-bottom: 4px;
}

.aastu-bubble a {
    color: #1d4ed8;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.15s ease;
}

.aastu-bubble a:hover {
    color: #0f172a;
}

.aastu-msg-user .aastu-bubble a {
    color: #e0f2fe;
}

.aastu-msg-time {
    font-size: 10px;
    color: #94a3b8;
    margin-top: 4px;
    padding: 0 4px;
}

.aastu-msg-user .aastu-msg-time {
    text-align: right;
}

/* Action Link Buttons inside Bot Replies */
.aastu-bot-action-links {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.aastu-action-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background: #eff6ff;
    color: #1d4ed8 !important;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    font-size: 11.5px;
    font-weight: 600;
    text-decoration: none !important;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.aastu-action-link-btn:hover {
    background: #dbeafe;
    border-color: #93c5fd;
    transform: translateY(-1px);
}

/* Typing Indicator Animation */
.aastu-typing-row {
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 14px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    width: fit-content;
}

.aastu-dot {
    width: 6px;
    height: 6px;
    background: #94a3b8;
    border-radius: 50%;
    animation: aastuBlink 1.4s infinite both;
}

.aastu-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.aastu-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes aastuBlink {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1.1);
    }
}

/* --------------------------------------------------------------------------
   5. Quick Reply Suggestions Section
   -------------------------------------------------------------------------- */
.aastu-quick-replies-area {
    background: #ffffff;
    border-top: 1px solid #f1f5f9;
    padding: 10px 14px;
    flex-shrink: 0;
}

.aastu-quick-title {
    font-size: 11px;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.aastu-quick-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    max-height: 80px;
    overflow-y: auto;
}

.aastu-quick-chip {
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    color: #1e293b;
    padding: 5px 10px;
    border-radius: 14px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.aastu-quick-chip:hover {
    background: #e2e8f0;
    border-color: #cbd5e1;
    color: #0f172a;
    transform: translateY(-1px);
}

.aastu-quick-chip:active {
    transform: translateY(0);
}

/* --------------------------------------------------------------------------
   6. Input Form Footer
   -------------------------------------------------------------------------- */
.aastu-chat-footer {
    padding: 12px 14px;
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    flex-shrink: 0;
}

.aastu-chat-form {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.aastu-chat-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 24px;
    font-size: 13.5px;
    font-family: inherit;
    color: #0f172a;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background: #f8fafc;
}

.aastu-chat-input:focus {
    border-color: #2563eb;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.aastu-chat-send-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #1d4ed8;
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, transform 0.1s ease;
    flex-shrink: 0;
}

.aastu-chat-send-btn:hover {
    background: #1e40af;
    transform: scale(1.04);
}

.aastu-chat-send-btn:active {
    transform: scale(0.96);
}

.aastu-chat-send-btn:disabled {
    background: #cbd5e1;
    cursor: not-allowed;
    transform: none;
}

/* --------------------------------------------------------------------------
   7. Mobile Responsiveness (Small Screens <= 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    #aastu-chatbot-container {
        bottom: 16px;
        right: 16px;
    }

    #aastu-chat-window {
        position: fixed;
        bottom: 0;
        right: 0;
        left: 0;
        top: 0;
        width: 100vw;
        max-width: 100vw;
        height: 100dvh;
        max-height: 100dvh;
        border-radius: 0;
        border: none;
        z-index: 100000;
        transform: translateY(100%);
    }

    #aastu-chatbot-container.active #aastu-chat-window {
        transform: translateY(0);
    }

    .aastu-chat-header {
        padding: 16px;
        border-radius: 0;
    }

    #aastu-chat-greeting-pill {
        display: none; /* Hide floating preview pill on mobile to prevent clutter */
    }
}