/* ================================
   COMPONENTS — Search, Quick Links, Chat, Tables, Modals, Loader
   ================================ */

/* ================================
   SEARCH BOX
   ================================ */
.search-box-container {
    width: 100%;
    max-width: 680px;
    margin-top: 32px;
    margin-bottom: 28px;
    animation: floatIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
}

.search-box {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    min-height: 110px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: var(--shadow-medium), var(--shadow-glow);
    transform: translateY(-2px);
}

.search-box textarea {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: 'DM Sans', sans-serif;
    font-size: 15px;
    font-weight: 400;
    color: var(--text-primary);
    padding: 18px 22px 8px;
    resize: none;
    min-height: 56px;
    line-height: 1.6;
    letter-spacing: -0.005em;
}

.search-box textarea::placeholder {
    color: var(--text-tertiary);
    font-weight: 400;
}

.search-actions {
    display: flex;
    align-items: center;
    padding: 10px 16px 14px;
    gap: 8px;
}

.spacer {
    flex: 1;
}

.send-btn {
    width: 38px;
    height: 38px;
    background: var(--primary);
    color: var(--text-on-primary);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 2px 8px rgba(176, 78, 132, 0.25);
    font-size: 15px;
}

.send-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px) scale(1.06);
    box-shadow: 0 6px 20px rgba(176, 78, 132, 0.35);
}

.send-btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.send-btn.loading {
    animation: spin 1s linear infinite;
}
.send-btn.stop-mode {
    background: #C44A4A;
    box-shadow: 0 2px 8px rgba(196, 74, 74, 0.25);
}
.send-btn.stop-mode:hover {
    background: #a83c3c;
    box-shadow: 0 6px 20px rgba(196, 74, 74, 0.35);
}

/* ================================
   QUICK LINKS
   ================================ */
.quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 720px;
    width: 100%;
    animation: revealSubtle 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
}

.quick-link {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 9px 20px;
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    box-shadow: 0 1px 2px rgba(44, 51, 70, 0.03);
    letter-spacing: -0.005em;
}

.quick-link:hover,
.quick-link:focus-visible {
    background: var(--primary);
    color: var(--text-on-primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(176, 78, 132, 0.3);
}

.quick-link:focus-visible {
    outline: 3px solid var(--primary-hover);
    outline-offset: 2px;
}

.quick-link i {
    font-size: 11px;
    color: var(--text-tertiary);
    transition: all 0.2s ease;
}

.quick-link:hover i,
.quick-link:focus-visible i {
    color: var(--text-on-primary);
    transform: translateX(2px);
}

/* ================================
   CHAT INTERFACE
   ================================ */
.chat-interface {
    display: none;
    flex-direction: column;
    height: calc(100vh - 12px);
    margin-top: 12px;
    overflow-x: hidden;
}

.chat-messages {
    flex: 1;
    padding: 20px 0 120px 0;
    overflow-y: auto;
    overflow-x: hidden;
    height: 85vh;
    max-height: 85vh;
    scroll-behavior: smooth;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.chat-messages::-webkit-scrollbar {
    width: 3px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--scrollbar-color);
    border-radius: var(--radius-full);
}

@supports (scrollbar-width: thin) {
    .chat-messages {
        scrollbar-width: thin;
        scrollbar-color: var(--scrollbar-color) transparent;
    }
}

/* Message Input */
.message-input-area {
    padding: 12px 24px 28px;
    background: transparent;
    position: sticky;
    bottom: 0;
    z-index: 100;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-soft);
    max-width: 800px;
    margin: 0 auto;
}

.input-container:focus-within {
    border-color: var(--primary);
    box-shadow: var(--shadow-medium), var(--shadow-glow);
    transform: translateY(-1px);
}

#messageInput {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: 'DM Sans', sans-serif;
    font-size: 14.5px;
    font-weight: 400;
    color: var(--text-primary);
    resize: none;
    max-height: 120px;
    min-height: 22px;
    line-height: 1.55;
    letter-spacing: -0.005em;
}

#messageInput::placeholder {
    color: var(--text-tertiary);
}

.chat-send-btn {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--text-on-primary);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(176, 78, 132, 0.2);
    font-size: 14px;
}

.chat-send-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 4px 12px rgba(176, 78, 132, 0.3);
}

.chat-send-btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

.chat-send-btn:active { transform: translateY(0) scale(0.97); }
.chat-send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.chat-send-btn.stop-mode {
    background: #C44A4A;
    box-shadow: 0 2px 6px rgba(196, 74, 74, 0.25);
}
.chat-send-btn.stop-mode:hover {
    background: #a83c3c;
    box-shadow: 0 4px 12px rgba(196, 74, 74, 0.35);
}

/* ================================
   MESSAGES
   ================================ */
.message {
    margin-bottom: 20px;
    display: flex;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
    overflow-x: hidden;
    opacity: 0;
    transform: translateY(16px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.message.user { justify-content: flex-end; }
.message.assistant { justify-content: flex-start; }

.message-content {
    max-width: 70%;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.message.user .message-content {
    align-items: flex-end;
    max-width: 70%;
}

.message.assistant .message-content {
    align-items: flex-start;
    max-width: 100%;
}

.message-bubble {
    background: var(--content-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    font-family: 'DM Sans', sans-serif;
    font-size: 14.5px;
    font-weight: 400;
    line-height: 1.65;
    color: var(--text-primary);
    letter-spacing: -0.005em;
    word-wrap: break-word;
    transition: all 0.2s ease;
    max-width: 100%;
    overflow-x: hidden;
}

.message.user .message-bubble {
    background: var(--chat-user-bg);
    color: var(--text-on-primary);
    border-color: var(--chat-user-border);
    border-bottom-right-radius: 6px;
    font-weight: 450;
}

.message.user .message-bubble,
.message.user .message-bubble * {
    color: var(--text-on-primary);
}

.message.assistant .message-bubble {
    background: var(--chat-assistant-bg);
    color: var(--text-primary);
    border: 1px solid var(--chat-assistant-border);
    border-bottom-left-radius: 6px;
    box-shadow: 0 1px 4px rgba(44, 51, 70, 0.04);
}

.message.fade-in { opacity: 1; transform: translateY(0); }
.message.user.fade-in { animation: slideInFromRight 0.45s cubic-bezier(0.16, 1, 0.3, 1); }
.message.assistant.fade-in { animation: slideInFromLeft 0.45s cubic-bezier(0.16, 1, 0.3, 1); }

.message-sources {
    margin-top: 8px;
    padding-top: 6px;
    border-top: 1px solid var(--border-light);
    color: var(--primary);
    font-weight: 600;
    font-size: 12px;
}

.message-meta {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 6px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.message.user .message-meta,
.message.user .message-meta i {
    color: #111111;
}

.message-meta-assistant {
    margin-top: 8px;
    align-self: stretch;
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.message-meta-assistant .feedback-section {
    margin-top: 0;
    order: 1;
    flex: 0 0 auto;
}

.assistant-source-label {
    order: 2;
    margin: -1px 0 0 12px;
    display: inline-flex;
    align-items: center;
    padding: 0;
    border: none;
    background: transparent;
    font-size: 0.8rem;
    font-weight: 600;
    color: #3f2d39;
    letter-spacing: 0.01em;
    white-space: normal;
    overflow: visible;
}

.assistant-source-clickable {
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.web-references-trigger {
    display: inline-flex;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 600;
    color: #3f2d39;
}

.assistant-time-outside {
    order: 3;
    margin-top: 0;
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: #111111;
    white-space: nowrap;
    align-self: flex-start;
}

.message-meta-assistant .feedback-title {
    color: #111111;
}

/* Hover source preview (ChatGPT-like citation card) */
.source-hover-preview {
    position: fixed;
    z-index: 4000;
    width: min(320px, calc(100vw - 24px));
    padding: 0;
    border-radius: 12px;
    border: 1px solid rgba(176, 78, 132, 0.24);
    background:
        radial-gradient(120% 140% at 0% 0%, rgba(176, 78, 132, 0.10) 0%, rgba(176, 78, 132, 0.03) 35%, rgba(255, 255, 255, 0.98) 72%),
        rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 28px rgba(44, 51, 70, 0.18), 0 2px 8px rgba(44, 51, 70, 0.10);
    pointer-events: auto;
    cursor: pointer;
    overflow: hidden;
}

.source-hover-preview.hidden {
    display: none;
}

.source-hover-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px 8px;
    background: rgba(176, 78, 132, 0.03);
}

.source-hover-arrows {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.source-hover-divider {
    height: 1px;
    background: rgba(176, 78, 132, 0.18);
}

.source-hover-body {
    padding: 10px 12px 12px;
}

.source-hover-domain {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: var(--primary);
    margin-bottom: 6px;
    text-transform: lowercase;
}

.source-hover-domain::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 3px rgba(176, 78, 132, 0.14);
    margin-right: 0;
}

.source-hover-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.source-hover-nav-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-light);
    border-radius: 7px;
    background: #fff;
    color: var(--text-primary);
    font-size: 19px;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.source-hover-nav-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(176, 78, 132, 0.06);
}

.source-hover-nav-btn:disabled {
    opacity: 0.45;
    cursor: default;
}

.source-hover-count {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
}

.inline-source-ref {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 6px;
    padding: 1px 6px;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: var(--surface-hover);
    color: #111111;
    font-size: 10px;
    line-height: 1.2;
    text-decoration: none;
    vertical-align: middle;
    transition: all 0.15s ease;
}

.inline-source-ref:hover {
    border-color: var(--primary);
    color: #111111;
    background: rgba(176, 78, 132, 0.08);
}

.inline-source-ref:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 1px;
}

.inline-source-ref::after {
    content: none;
}

.sources-summary-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-right: 6px;
    padding: 2px 8px;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: var(--surface-hover);
    color: var(--primary);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.3;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sources-summary-btn:hover {
    border-color: var(--primary);
    background: rgba(176, 78, 132, 0.08);
}

.sources-summary-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 1px;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 14px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: 6px;
    box-shadow: 0 1px 3px rgba(44, 51, 70, 0.04);
    min-height: 48px;
}

.typing-bubble { transition: all 0.3s ease; overflow: hidden; }

.typing-dot {
    width: 7px;
    height: 7px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typingPulse 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* New Message Indicator */
.new-message-indicator {
    position: fixed;
    bottom: 100px;
    right: 24px;
    background: var(--accent);
    color: var(--text-on-primary);
    border: none;
    border-radius: var(--radius-full);
    padding: 10px 18px;
    font-family: 'DM Sans', sans-serif;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 1000;
    animation: slideInUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    transition: all 0.25s ease;
}

.new-message-indicator:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.new-message-indicator:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

.new-message-indicator i { font-size: 11px; }

/* ================================
   JOIN US / CTA BUTTON
   ================================ */
.rainbow-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 28px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-on-primary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), #9d2266, #692362, var(--primary));
    background-size: 300% 300%;
    animation: gradientShift 4s ease infinite;
    box-shadow: 0 3px 12px rgba(176, 78, 132, 0.25);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.rainbow-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(176, 78, 132, 0.35);
}

.rainbow-button:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

.rainbow-button:active { transform: translateY(0); }

.rainbow-button i {
    margin-right: 7px;
    font-size: 11px;
}

/* ================================
   TABLES
   ================================ */
.table-container {
    overflow-x: auto;
    overflow-y: visible;
    margin: 16px 0;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    max-width: 100%;
    width: 100%;
    display: block;
}

.table-container::-webkit-scrollbar { height: 6px; }
.table-container::-webkit-scrollbar-track { background: var(--content-bg); border-radius: 3px; }
.table-container::-webkit-scrollbar-thumb { background: var(--scrollbar-color); border-radius: 3px; }
.table-container::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-hover); }

.data-table {
    width: auto;
    min-width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    font-size: 13.5px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    table-layout: auto;
    display: table;
}

.data-table th {
    background: var(--accent);
    color: var(--text-on-primary);
    font-weight: 600;
    padding: 13px 18px;
    text-align: left;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 10;
    font-family: 'DM Sans', sans-serif;
}

.data-table th:first-child { border-top-left-radius: var(--radius-md); }
.data-table th:last-child { border-top-right-radius: var(--radius-md); }

.data-table td {
    padding: 13px 18px;
    border-bottom: 1px solid var(--border-light);
    vertical-align: top;
    transition: background 0.15s ease;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 300px;
    color: var(--text-primary);
    background: var(--surface);
}

.data-table td:first-child { white-space: nowrap; }
.data-table tr:hover td { background: var(--table-row-hover); }
.data-table tr:last-child td { border-bottom: none; }

.data-table a {
    color: var(--source-link-color);
    text-decoration: none;
    font-weight: 500;
    padding: 3px 6px;
    border-radius: 5px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    white-space: nowrap;
}

.data-table a:hover {
    background: var(--content-link-bg);
    color: var(--primary);
    transform: translateY(-1px);
}

.data-table a:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }
.data-table a::after { content: "\2197"; font-size: 9px; opacity: 0.6; }

.markdown-table {
    width: auto;
    min-width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    font-size: 13.5px;
    margin: 16px 0;
    display: table;
}

.markdown-table th, .markdown-table td {
    padding: 8px 12px;
    border: 1px solid var(--border);
    text-align: left;
    white-space: normal;
    word-wrap: break-word;
    color: var(--text-primary);
}

.markdown-table th {
    background: var(--content-bg);
    font-weight: 600;
    white-space: nowrap;
}

.markdown-table tr:nth-child(even) { background: var(--table-row-even); }

/* Chunked Messages */
.chunked-message { margin-bottom: 6px; }
.chunked-message.first-chunk { margin-top: 14px; }
.chunked-message.last-chunk { margin-bottom: 20px; }
.chunked-message:not(.last-chunk) .message-meta { display: none; }
.chunked-message .message-bubble { border-radius: var(--radius-lg); }
.chunked-message:not(.first-chunk) .message-bubble { border-top-left-radius: 6px; }
.chunked-message:not(.last-chunk) .message-bubble { border-bottom-left-radius: 6px; }

/* Suggested Actions */
.suggested-actions { display: none; }

.actions-label {
    font-size: 10.5px;
    font-weight: 700;
    color: var(--text-tertiary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.actions-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.action-btn:hover {
    background: var(--content-hover-bg);
    border-color: var(--primary);
    transform: translateY(-1px);
}

.action-btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.action-btn i { color: var(--primary); font-size: 13px; width: 16px; text-align: center; }

/* "You might also want to know" */
.you-might-know-section {
    margin-top: 14px;
    padding: 14px;
    background: var(--content-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.you-might-know-header {
    font-size: 10.5px;
    font-weight: 800;
    color: #111111;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.you-might-know-header i { color: #E8A838; font-size: 13px; }

.you-might-know-list { display: flex; flex-direction: column; gap: 6px; }

.you-might-know-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
    cursor: default;
}

.you-might-know-item::before { display: none; }
.you-might-know-item.clickable { cursor: pointer; }

.you-might-know-item.clickable:hover {
    background: var(--content-hover-bg);
    border-color: var(--primary);
    transform: translateY(-1px);
}

.you-might-know-item.clickable:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.you-might-know-item i { color: var(--primary); font-size: 13px; width: 16px; text-align: center; flex-shrink: 0; }
.you-might-know-item.non-clickable i { color: var(--text-tertiary); }
.you-might-know-item.non-clickable { color: var(--text-secondary); font-style: italic; }

/* ================================
   STUDYNET CTA LINKS
   ================================ */
.studynet-cta-card {
    margin-top: 14px;
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(176, 78, 132, 0.28);
    background:
        radial-gradient(140% 120% at 0% 0%, rgba(176, 78, 132, 0.12) 0%, rgba(176, 78, 132, 0.04) 36%, transparent 72%),
        linear-gradient(180deg, var(--surface) 0%, var(--content-bg) 100%);
    box-shadow: var(--shadow-soft);
}

.studynet-cta-title {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.studynet-cta-subtitle {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.45;
}

.studynet-cta-grid {
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.studynet-cta-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 11px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(176, 78, 132, 0.3);
    background: var(--surface);
    color: var(--text-primary);
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(44, 51, 70, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.studynet-cta-btn:hover {
    transform: translateY(-2px);
    border-color: rgba(176, 78, 132, 0.55);
    box-shadow: 0 6px 16px rgba(176, 78, 132, 0.2);
    background: linear-gradient(180deg, var(--surface) 0%, rgba(176, 78, 132, 0.08) 100%);
}

.studynet-cta-btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.studynet-cta-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: rgba(176, 78, 132, 0.12);
}

.studynet-cta-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.studynet-cta-arrow {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ================================
   CONTENT TYPOGRAPHY
   ================================ */
.content-p {
    margin: 0 0 14px 0;
    line-height: 1.65;
    color: var(--text-primary);
    font-size: 14.5px;
}

.content-h1 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 22px;
    font-weight: 400;
    color: var(--text-primary);
    margin: 24px 0 14px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
    letter-spacing: -0.01em;
}

.content-h2 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 19px;
    font-weight: 400;
    color: var(--text-primary);
    margin: 20px 0 12px 0;
    padding: 0;
    border-left: none;
    background: transparent;
    border-radius: 0;
    letter-spacing: -0.01em;
}

.content-h3 {
    font-family: 'DM Sans', sans-serif;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 16px 0 8px 0;
    letter-spacing: -0.01em;
}

.content-strong {
    font-weight: 600;
    color: var(--primary);
}

[data-theme="dark"] .content-strong {
    color: var(--primary);
    -webkit-text-fill-color: var(--primary);
}

.content-em {
    font-style: italic;
    color: var(--text-secondary);
}

.content-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    padding: 1px 5px;
    border-radius: 4px;
    background: var(--content-link-bg);
    transition: all 0.2s ease;
    display: inline-block;
    margin: 0 1px;
    border: 1px solid var(--content-link-border);
    font-size: 0.95em;
}

.content-link:hover {
    background: rgba(176, 78, 132, 0.15);
    border-color: rgba(176, 78, 132, 0.3);
    transform: translateY(-1px);
}

.content-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }
.content-link::after { content: " \2197"; font-size: 0.85em; opacity: 0.55; }

.scholarship-url {
    display: block;
    margin: 6px 0;
    padding: 0;
    background: transparent;
    border-left: none;
    border-radius: 0;
    word-break: break-all;
    font-size: 0.88em;
}

.scholarship-url:hover { background: transparent; }

.content-list {
    margin: 10px 0;
    padding-left: 20px;
    list-style: disc;
}

.content-li {
    margin: 4px 0;
    padding: 0;
    background: transparent;
    border-left: none;
    border-radius: 0;
    position: static;
    transition: none;
    color: var(--text-primary);
    font-size: 14.5px;
    line-height: 1.6;
}

.content-li .content-p {
    margin: 0;
}

.content-li:hover {
    background: transparent;
    transform: none;
}

.content-li::before {
    content: none;
}

.content-hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 22px 0;
}

/* Code */
.code-block {
    background: var(--surface-code);
    border-radius: var(--radius-md);
    margin: 14px 0;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border);
}

.code-block pre { margin: 0; padding: 18px; overflow-x: auto; }

.code-block code {
    color: #d4d5da;
    font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.55;
}

.inline-code {
    background: var(--inline-code-bg);
    color: var(--inline-code-color);
    padding: 1.5px 5px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    font-size: 12.5px;
    font-weight: 500;
    border: 1px solid var(--inline-code-border);
}

/* ================================
   LOADING & MODALS
   ================================ */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--overlay-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.loading-spinner { text-align: center; color: var(--primary); }
.loading-spinner i { font-size: 28px; margin-bottom: 14px; animation: spin 1s linear infinite; }
.loading-spinner p { font-size: 14px; font-weight: 500; color: var(--text-secondary); }

.modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--modal-overlay-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-heavy);
    animation: modalSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.modal-icon { font-size: 40px; color: var(--primary); margin-bottom: 14px; }
.modal-custom-icon { color: #E8A838; }

.modal-content h2 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 22px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.modal-content p {
    font-size: 14.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.55;
}

.modal-custom-list {
    text-align: left;
    margin: 16px 0;
    padding-left: 18px;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.8;
}

.modal-custom-hint { color: var(--text-secondary); font-size: 13px; margin-top: 8px; }

.modal-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.modal-custom-actions { display: flex; gap: 8px; margin-top: 18px; }

.modal-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 22px;
    border: none;
    border-radius: var(--radius-full);
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    letter-spacing: 0.01em;
}

.modal-btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.modal-btn.primary, .modal-btn-primary {
    background: var(--primary);
    color: var(--text-on-primary);
}

.modal-btn.primary:hover, .modal-btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(176, 78, 132, 0.25);
}

.modal-btn.secondary, .modal-btn-secondary {
    background: var(--modal-btn-secondary-bg);
    color: var(--text-primary);
}

.modal-btn.secondary:hover, .modal-btn-secondary:hover {
    background: var(--modal-btn-secondary-hover);
}

/* Source Badges */
.source-badge {
    display: inline-block;
    background-color: var(--source-bg);
    color: var(--source-color);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    margin-right: 5px;
    margin-bottom: 3px;
    border: 1px solid var(--source-border);
    letter-spacing: 0.01em;
}

/* ================================
   DEEP THINKING LOADER
   ================================ */
.deep-thinking-loader {
    width: fit-content;
    max-width: 800px;
    overflow: hidden;
    padding: 10px 18px;
    background: var(--loader-bg);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    margin-top: 8px;
    transition: all 0.3s ease;
    cursor: default;
}

.deep-thinking-loader:hover {
    background: var(--loader-hover-bg);
    border-radius: var(--radius-md);
    padding: 14px;
    width: 100%;
    box-shadow: var(--shadow-soft);
    border-color: var(--border);
}

.thinking-header {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    animation: pulse-text 2s infinite ease-in-out;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-light);
    width: 100%;
}

.thinking-header i { color: var(--primary); font-size: 16px; animation: spin 2s linear infinite; }

.thinking-steps {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 10px;
    padding-top: 4px;
    max-height: 90px;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
    transition: all 0.5s ease;
}

.thinking-step {
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.5;
    transition: all 0.3s ease;
    padding: 2px 0;
}

.thinking-step.step-waiting { opacity: 0.35; }
.thinking-step.step-active { opacity: 1; transform: translateX(3px); }
.thinking-step.step-completed { opacity: 0.55; }

.step-icon {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    border-radius: 50%;
    background: var(--step-icon-bg);
    transition: all 0.3s ease;
}

.step-waiting .step-icon { color: var(--step-waiting-color); }
.step-active .step-icon { color: var(--primary); background: var(--primary-glow); box-shadow: 0 0 0 2px var(--primary-glow); }
.step-completed .step-icon { color: var(--text-on-primary); background: var(--step-completed-icon-bg); }

.step-text { font-size: 12px; font-weight: 500; color: var(--text-primary); }
.step-active .step-text { font-weight: 600; color: var(--primary); }
.step-completed .step-text { color: var(--step-completed-text); text-decoration: line-through; font-weight: 400; }

/* ================================
   MOBILE MENU OVERLAY
   ================================ */
.mobile-menu-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--modal-overlay-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.mobile-menu-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 380px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-heavy);
    animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    border: 1px solid var(--border-light);
}

.mobile-menu-header { margin-bottom: 28px; }

.mobile-menu-header h2 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 22px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.mobile-menu-close {
    position: absolute;
    top: 14px; right: 14px;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.mobile-menu-close:hover { background: var(--surface-hover); color: var(--text-primary); }
.mobile-menu-close:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.mobile-menu-actions { display: flex; flex-direction: column; gap: 12px; }

.mobile-login-btn,
.mobile-signup-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 22px;
    border-radius: var(--radius-full);
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 14.5px;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 2px solid transparent;
    letter-spacing: 0.01em;
}

.mobile-login-btn:focus-visible,
.mobile-signup-btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.mobile-login-btn {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}

.mobile-login-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.mobile-signup-btn {
    background: var(--primary);
    color: var(--text-on-primary);
}

.mobile-signup-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(176, 78, 132, 0.3);
}

.mobile-menu-toggle { display: none; }