/* ==========================================================================
   YROS CHAT WIDGET - THEME SYSTEM (LIGHT DEFAULT & DYNAMIC DARK MODE)
   ========================================================================== */

:root {
    /* --- Light Mode (Default Theme - White / Clean Glass) --- */
    --yros-primary: #0084ff;
    --yros-secondary: #0051ff;
    --yros-font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Window & Glass */
    --yros-window-bg: #ffffff;
    --yros-window-border: rgba(0, 0, 0, 0.08);
    --yros-window-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
    
    /* Header */
    --yros-header-bg: #ffffff;
    --yros-header-border: #f1f5f9;
    --yros-title-color: #0f172a;
    --yros-close-color: #94a3b8;
    --yros-close-hover: #0f172a;
    
    /* Body & Messages */
    --yros-body-bg: #f8fafc;
    --yros-scrollbar: rgba(0, 0, 0, 0.12);
    
    --yros-msg-bot-bg: #ffffff;
    --yros-msg-bot-color: #1e293b;
    --yros-msg-bot-border: rgba(0, 81, 255, 0.12);
    --yros-msg-bot-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    
    --yros-msg-user-bg: #0f172a;
    --yros-msg-user-color: #ffffff;
    --yros-msg-user-shadow: 0 2px 6px rgba(15, 23, 42, 0.2);
    
    /* Footer & Input */
    --yros-footer-bg: #ffffff;
    --yros-footer-border: #f1f5f9;
    --yros-input-bg: #f1f5f9;
    --yros-input-border: #e2e8f0;
    --yros-input-border-focus: rgba(0, 132, 255, 0.4);
    --yros-input-text: #0f172a;
    --yros-input-placeholder: #94a3b8;
    
    /* Floating Button */
    --yros-btn-bg: rgba(255, 255, 255, 0.95);
    --yros-btn-border: rgba(0, 0, 0, 0.08);
    --yros-btn-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
    --yros-btn-icon: #f59e0b;
    
    /* Welcome Popup */
    --yros-popup-bg: #ffffff;
    --yros-popup-text: #0f172a;
    --yros-popup-border: rgba(0, 0, 0, 0.08);
    --yros-popup-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    
    /* Markdown Styles (Light Mode) */
    --yros-md-h2: #0f172a;
    --yros-md-h3: #1d4ed8;
    --yros-md-h4: #334155;
    --yros-md-table-bg: #ffffff;
    --yros-md-table-border: #e2e8f0;
    --yros-md-table-th-bg: #f1f5f9;
    --yros-md-table-th-color: #0f172a;
    --yros-md-table-td-color: #334155;
    --yros-md-table-hover: #f8fafc;
    --yros-md-code-bg: #0f172a;
    --yros-md-code-header-bg: #1e293b;
    --yros-md-code-header-color: #94a3b8;
    --yros-md-code-text: #38bdf8;
    --yros-md-inline-code-bg: #eff6ff;
    --yros-md-inline-code-color: #1d4ed8;
    --yros-md-inline-code-border: #bfdbfe;
    --yros-md-quote-bg: #f0f9ff;
    --yros-md-quote-border: #0284c7;
    --yros-md-quote-color: #334155;
    --yros-md-hr: #e2e8f0;
    --yros-md-link: #0284c7;
    --yros-md-link-hover: #0369a1;
}

/* --- Dark Mode (Active when parent has .dark-mode or #page-container.dark-mode) --- */
.dark-mode,
#page-container.dark-mode,
body.dark-mode,
html.dark-mode,
.dark-mode #yros-chat-window,
.dark-mode #yros-floating-btn,
.dark-mode #yros-welcome-popup,
#yros-chat-window.yros-dark-mode,
#yros-floating-btn.yros-dark-mode,
#yros-welcome-popup.yros-dark-mode {
    --yros-primary: #00f2ff;
    --yros-secondary: #0051ff;
    
    /* Window & Glass */
    --yros-window-bg: rgba(22, 24, 30, 0.96);
    --yros-window-border: rgba(255, 255, 255, 0.1);
    --yros-window-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    
    /* Header */
    --yros-header-bg: rgba(255, 255, 255, 0.03);
    --yros-header-border: rgba(255, 255, 255, 0.08);
    --yros-title-color: #ffffff;
    --yros-close-color: rgba(255, 255, 255, 0.4);
    --yros-close-hover: #ffffff;
    
    /* Body & Messages */
    --yros-body-bg: #121418;
    --yros-scrollbar: rgba(255, 255, 255, 0.15);
    
    --yros-msg-bot-bg: rgba(0, 81, 255, 0.15);
    --yros-msg-bot-color: #edf2f7;
    --yros-msg-bot-border: rgba(0, 242, 255, 0.1);
    --yros-msg-bot-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    
    --yros-msg-user-bg: #334155;
    --yros-msg-user-color: #ffffff;
    --yros-msg-user-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    
    /* Footer & Input */
    --yros-footer-bg: rgba(0, 0, 0, 0.2);
    --yros-footer-border: rgba(255, 255, 255, 0.08);
    --yros-input-bg: rgba(255, 255, 255, 0.07);
    --yros-input-border: rgba(255, 255, 255, 0.08);
    --yros-input-border-focus: rgba(0, 242, 255, 0.35);
    --yros-input-text: #ffffff;
    --yros-input-placeholder: rgba(255, 255, 255, 0.35);
    
    /* Floating Button */
    --yros-btn-bg: rgba(20, 20, 25, 0.85);
    --yros-btn-border: rgba(255, 255, 255, 0.12);
    --yros-btn-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    --yros-btn-icon: #ffd700;
    
    /* Welcome Popup */
    --yros-popup-bg: rgba(20, 20, 25, 0.95);
    --yros-popup-text: #ffffff;
    --yros-popup-border: rgba(255, 255, 255, 0.12);
    --yros-popup-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    
    /* Markdown Styles (Dark Mode) */
    --yros-md-h2: #00f2ff;
    --yros-md-h3: #60a5fa;
    --yros-md-h4: #e2e8f0;
    --yros-md-table-bg: rgba(0, 0, 0, 0.25);
    --yros-md-table-border: rgba(255, 255, 255, 0.1);
    --yros-md-table-th-bg: rgba(0, 81, 255, 0.25);
    --yros-md-table-th-color: #00f2ff;
    --yros-md-table-td-color: #e2e8f0;
    --yros-md-table-hover: rgba(255, 255, 255, 0.03);
    --yros-md-code-bg: #0f172a;
    --yros-md-code-header-bg: rgba(255, 255, 255, 0.06);
    --yros-md-code-header-color: #94a3b8;
    --yros-md-code-text: #38bdf8;
    --yros-md-inline-code-bg: rgba(0, 242, 255, 0.12);
    --yros-md-inline-code-color: #00f2ff;
    --yros-md-inline-code-border: rgba(0, 242, 255, 0.2);
    --yros-md-quote-bg: rgba(0, 242, 255, 0.05);
    --yros-md-quote-border: #00f2ff;
    --yros-md-quote-color: #cbd5e1;
    --yros-md-hr: rgba(255, 255, 255, 0.1);
    --yros-md-link: #38bdf8;
    --yros-md-link-hover: #00f2ff;
}

/* ==========================================================================
   FLOATING BUTTON
   ========================================================================== */
#yros-floating-btn {
    position: fixed !important;
    bottom: 90px !important;
    right: 20px !important;
    width: 48px !important;
    height: 48px !important;
    background: var(--yros-btn-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--yros-btn-shadow);
    cursor: pointer;
    z-index: 10000 !important;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--yros-btn-border);
    overflow: visible;
}

#yros-floating-btn:hover {
    transform: scale(1.06);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2), 0 0 20px rgba(245, 158, 11, 0.2);
}

#yros-floating-btn i,
#yros-floating-btn svg {
    font-size: 24px !important;
    width: 24px !important;
    height: 24px !important;
    color: var(--yros-btn-icon) !important;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 2px 6px rgba(245, 158, 11, 0.25));
    transition: all 0.3s ease;
}

#yros-floating-btn.has-notification::after {
    content: '';
    position: absolute;
    top: 0px;
    right: 0px;
    width: 13px;
    height: 13px;
    background: #ef4444;
    border-radius: 50%;
    border: 2px solid #ffffff;
}

/* ==========================================================================
   CHAT WINDOW
   ========================================================================== */
#yros-chat-window {
    position: fixed;
    bottom: 172px;
    right: 20px;
    width: 390px;
    height: 600px;
    max-height: 80vh;
    background: var(--yros-window-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--yros-window-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--yros-window-shadow);
    z-index: 10000;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

#yros-chat-window.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

/* --- Header --- */
.yros-chat-header {
    padding: 14px 18px;
    background: var(--yros-header-bg);
    border-bottom: 1px solid var(--yros-header-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.yros-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.yros-avatar-small {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--yros-secondary), var(--yros-primary));
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 17px;
    box-shadow: 0 3px 8px rgba(0, 132, 255, 0.25);
}

.yros-info h4 {
    margin: 0;
    color: var(--yros-title-color);
    font-family: var(--yros-font-family);
    font-size: 15px;
    font-weight: 600;
}

.yros-status {
    font-size: 11.5px;
    color: #10b981;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 2px;
    font-weight: 500;
}

.yros-status::before {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
}

.yros-close-btn {
    background: none;
    border: none;
    color: var(--yros-close-color);
    cursor: pointer;
    font-size: 18px;
    transition: color 0.2s, transform 0.2s;
    padding: 4px;
    border-radius: 6px;
}

.yros-close-btn:hover {
    color: var(--yros-close-hover);
    transform: scale(1.1);
}

/* --- Body --- */
.yros-chat-body {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--yros-body-bg);
    scrollbar-width: thin;
    scrollbar-color: var(--yros-scrollbar) transparent;
}

.yros-chat-body::-webkit-scrollbar {
    width: 5px;
}

.yros-chat-body::-webkit-scrollbar-thumb {
    background: var(--yros-scrollbar);
    border-radius: 3px;
}

/* --- Messages --- */
.yros-message {
    max-width: 88%;
    padding: 11px 15px;
    border-radius: 14px;
    font-family: var(--yros-font-family);
    font-size: 13.5px;
    line-height: 1.55;
    position: relative;
    animation: messageIn 0.25s ease-out forwards;
    word-wrap: break-word;
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.msg-bot {
    align-self: flex-start;
    background: var(--yros-msg-bot-bg);
    color: var(--yros-msg-bot-color);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--yros-msg-bot-border);
    box-shadow: var(--yros-msg-bot-shadow);
}

.msg-user {
    align-self: flex-end;
    background: var(--yros-msg-user-bg);
    color: var(--yros-msg-user-color);
    border-bottom-right-radius: 4px;
    box-shadow: var(--yros-msg-user-shadow);
}

/* --- Footer (Input) --- */
.yros-chat-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--yros-footer-border);
    background: var(--yros-footer-bg);
}

.yros-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--yros-input-bg);
    padding: 8px 12px;
    border-radius: 12px;
    border: 1px solid var(--yros-input-border);
    transition: all 0.2s ease;
}

.yros-input-group:focus-within {
    border-color: var(--yros-input-border-focus);
    box-shadow: 0 0 0 2px var(--yros-input-border-focus);
}

.yros-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--yros-input-text);
    font-family: var(--yros-font-family);
    font-size: 13.5px;
    outline: none;
}

.yros-input::placeholder {
    color: var(--yros-input-placeholder);
}

.yros-send-btn {
    background: transparent;
    border: none;
    color: var(--yros-primary);
    cursor: pointer;
    font-size: 16px;
    padding: 4px 6px;
    transition: transform 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.yros-send-btn:hover {
    transform: scale(1.15);
    color: var(--yros-secondary);
}

/* --- Typing Indicator --- */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 2px;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--yros-primary);
    border-radius: 50%;
    animation: yrosTyping 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes yrosTyping {
    0%, 80%, 100% {
        transform: scale(0.3);
        opacity: 0.4;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ==========================================================================
   WELCOME POPUP
   ========================================================================== */
#yros-welcome-popup {
    position: fixed;
    bottom: 173px;
    right: 20px;
    background: var(--yros-popup-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 16px;
    padding-right: 32px;
    border-radius: 12px;
    color: var(--yros-popup-text);
    font-family: var(--yros-font-family);
    font-size: 13px;
    max-width: 240px;
    box-shadow: var(--yros-popup-shadow);
    z-index: 9999;
    opacity: 0;
    transform: translateY(10px) scale(0.95);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1);
    border: 1px solid var(--yros-popup-border);
}

#yros-welcome-popup.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
    animation: yrosPopupSlideIn 0.35s ease-out;
}

@keyframes yrosPopupSlideIn {
    0% {
        opacity: 0;
        transform: translateY(12px) scale(0.92);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

#yros-welcome-popup .popup-close {
    position: absolute;
    top: 6px;
    right: 8px;
    background: none;
    border: none;
    color: var(--yros-close-color);
    font-size: 16px;
    cursor: pointer;
    line-height: 1;
    padding: 2px 4px;
}

#yros-welcome-popup .popup-close:hover {
    color: var(--yros-close-hover);
}

#yros-welcome-popup .popup-icon {
    display: inline-block;
    margin-right: 6px;
    font-size: 15px;
    animation: yrosWaveHand 1s ease-in-out 2;
}

@keyframes yrosWaveHand {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(14deg); }
    75% { transform: rotate(-14deg); }
}

/* ==========================================================================
   MARKDOWN STYLING (THEMED)
   ========================================================================== */

.msg-bot .yros-h2 {
    font-size: 15px;
    font-weight: 700;
    color: var(--yros-md-h2);
    margin: 8px 0 6px 0;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--yros-header-border);
}

.msg-bot .yros-h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--yros-md-h3);
    margin: 8px 0 4px 0;
}

.msg-bot .yros-h4,
.msg-bot .yros-h5 {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--yros-md-h4);
    margin: 6px 0 3px 0;
}

.msg-bot .yros-list {
    margin: 6px 0 8px 0;
    padding-left: 20px;
}

.msg-bot .yros-list li {
    margin-bottom: 4px;
    line-height: 1.45;
}

.msg-bot .yros-olist {
    list-style-type: decimal;
}

.msg-bot .yros-table-wrapper {
    width: 100%;
    overflow-x: auto;
    margin: 10px 0;
    border-radius: 8px;
    border: 1px solid var(--yros-md-table-border);
    background: var(--yros-md-table-bg);
    scrollbar-width: thin;
}

.msg-bot .yros-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    text-align: left;
}

.msg-bot .yros-table th {
    background: var(--yros-md-table-th-bg);
    color: var(--yros-md-table-th-color);
    font-weight: 600;
    padding: 7px 10px;
    border-bottom: 1px solid var(--yros-md-table-border);
    white-space: nowrap;
}

.msg-bot .yros-table td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--yros-md-table-border);
    color: var(--yros-md-table-td-color);
}

.msg-bot .yros-table tr:last-child td {
    border-bottom: none;
}

.msg-bot .yros-table tr:hover td {
    background: var(--yros-md-table-hover);
}

.msg-bot .yros-code-block {
    margin: 10px 0;
    background: var(--yros-md-code-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

.msg-bot .yros-code-header {
    background: var(--yros-md-code-header-bg);
    padding: 4px 10px;
    font-size: 11px;
    color: var(--yros-md-code-header-color);
    text-transform: uppercase;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.msg-bot .yros-code-block pre {
    margin: 0;
    padding: 10px;
    overflow-x: auto;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.4;
    color: var(--yros-md-code-text);
}

.msg-bot .yros-inline-code {
    background: var(--yros-md-inline-code-bg);
    color: var(--yros-md-inline-code-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
    border: 1px solid var(--yros-md-inline-code-border);
}

.msg-bot .yros-blockquote {
    margin: 8px 0;
    padding: 6px 12px;
    border-left: 3px solid var(--yros-md-quote-border);
    background: var(--yros-md-quote-bg);
    color: var(--yros-md-quote-color);
    font-style: italic;
    border-radius: 0 6px 6px 0;
}

.msg-bot .yros-hr {
    border: none;
    border-top: 1px solid var(--yros-md-hr);
    margin: 10px 0;
}

.msg-bot .yros-link {
    color: var(--yros-md-link);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.2s;
}

.msg-bot .yros-link:hover {
    color: var(--yros-md-link-hover);
}

.msg-bot .yros-spacer {
    height: 8px;
}

/* ==========================================================================
   RESPONSIVE & MOBILE
   ========================================================================== */
@media (max-width: 480px) {
    #yros-chat-window {
        bottom: 0;
        right: 0;
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
    }
}

@media (max-width: 768px) {
    #yros-floating-btn,
    #yros-chat-window,
    #yros-welcome-popup {
        display: none !important;
    }
}