@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&family=Dancing+Script:wght@600;700&display=swap");

:root {
    --bg: #030508;
    --panel-bg: rgba(10, 14, 23, 0.6);
    --border: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #00f0ff;
    --accent-2: #8a2be2;
    --success: #10b981;
    --danger: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: "Outfit", system-ui, sans-serif;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

button {
    all: unset;
    cursor: pointer;
    display: inline-flex;
    box-sizing: border-box;
}
input,
textarea,
select {
    all: unset;
    box-sizing: border-box;
}
a {
    text-decoration: none;
    color: inherit;
}

/* ── The Ambient Grid ── */
.luminous-grid {
    position: fixed;
    inset: 0;
    background:
        linear-gradient(rgba(0, 240, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black 10%, transparent 80%);
    -webkit-mask-image: radial-gradient(
        circle at center,
        black 10%,
        transparent 80%
    );
    z-index: -1;
    pointer-events: none;
    animation: bg-pan 40s linear infinite;
}

@keyframes bg-pan {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 50px 50px;
    }
}

/* ── Glow Orbs ── */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -2;
    pointer-events: none;
    opacity: 0.3;
}
.orb-cyan {
    width: 50vw;
    height: 50vw;
    background: var(--accent);
    top: -20%;
    right: -10%;
    animation: pulse-orb 12s alternate infinite;
}
.orb-purple {
    width: 40vw;
    height: 40vw;
    background: var(--accent-2);
    bottom: -10%;
    left: -20%;
    animation: pulse-orb 15s alternate-reverse infinite;
}
@keyframes pulse-orb {
    0% {
        transform: scale(0.9);
        opacity: 0.2;
    }
    100% {
        transform: scale(1.1);
        opacity: 0.5;
    }
}

/* ── Glass Panels ── */
.cyber-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.8);
    transition: all 0.3s ease;
}

/* ── Typography ── */
.hero-title {
    font-size: min(4.5rem, 10vw);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    text-align: center;
}
.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
    line-height: 1.6;
}
.text-gradient-2 {
    background: linear-gradient(
        135deg,
        var(--accent) 20%,
        var(--accent-2) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: hue-shift 5s linear infinite;
}
@keyframes hue-shift {
    0% {
        filter: hue-rotate(0deg);
    }
    100% {
        filter: hue-rotate(360deg);
    }
}

/* ── Layout ── */
.app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 0 24px;
    max-width: 1000px;
    margin: 0 auto;
}

/* ── Nav ── */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 32px 0;
    z-index: 50;
}
.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}
.brand-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.2);
}
.nav-status {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 10px 20px;
    border-radius: 99px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.03);
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.status-online {
    background: var(--success);
    box-shadow: 0 0 12px var(--success);
}
.status-offline {
    background: var(--danger);
    box-shadow: 0 0 12px var(--danger);
}

/* ── New ChatGPT/WhatsApp Style Search Box ── */
.search-wrapper {
    width: 100%;
    position: relative;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.chat-input-wrapper {
    background: rgba(30, 35, 45, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 6px 6px 6px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    transition: 0.3s;
}
.chat-input-wrapper:focus-within {
    border-color: rgba(0, 240, 255, 0.4);
    box-shadow:
        0 0 30px rgba(0, 240, 255, 0.15),
        0 8px 30px rgba(0, 0, 0, 0.5);
}
.chat-input {
    flex: 1;
    font-size: 1.05rem;
    color: #fff;
    line-height: 1.5;
    resize: none;
    outline: none;
    padding: 6px 0;
    font-family: inherit;
}
.chat-input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}
.chat-input::-webkit-scrollbar,
.info-modal::-webkit-scrollbar {
    width: 6px;
}
.chat-input::-webkit-scrollbar-track,
.info-modal::-webkit-scrollbar-track {
    background: transparent;
}
.info-modal::-webkit-scrollbar-track {
    margin-block: 24px;
}
.chat-input::-webkit-scrollbar-thumb,
.info-modal::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}
.chat-input::-webkit-scrollbar-thumb:hover,
.info-modal::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

.send-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--text-main);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    flex-shrink: 0;
}
.send-btn:hover:not(:disabled) {
    transform: scale(1.08);
    background: var(--accent);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}
.send-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
    background: var(--text-main);
}
.spinner-micro {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ── Search Controls (Settings) ── */
.search-controls {
    display: flex;
    align-items: center;
    padding: 4px 8px;
    gap: 16px;
    margin-top: 4px;
}
.controls-group {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}
.cyber-select {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px 14px;
    font-size: 0.85rem;
    color: var(--text-main);
    transition: 0.2s;
    cursor: pointer;
}
.cyber-select:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Custom React Dropdown Override */
.custom-dropdown-menu {
    position: absolute;
    left: 0;
    width: 100%;
    background: rgba(12, 14, 20, 0.95);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,0,0,0.8), 0 0 20px rgba(0, 240, 255, 0.15);
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.custom-dropdown-item {
    padding: 12px 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: left;
    transition: 0.2s;
    background: transparent;
    width: 100%;
    display: block;
}

.custom-dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.custom-dropdown-item.active {
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent);
    font-weight: 500;
    border-left: 2px solid var(--accent);
    padding-left: 14px;
}

.cyber-btn-outline {
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: 0.2s;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
}
.cyber-btn-outline.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.4);
    color: var(--accent);
}
.cyber-btn-outline:hover {
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.cyber-input {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px 14px;
    color: var(--accent);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.9rem;
    outline: none;
    transition: 0.2s;
}
.cyber-input:focus {
    border-color: var(--accent);
}

/* ── Suggestions ── */
.example-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}
.chip {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 10px 18px;
    border-radius: 99px;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: 0.3s;
}
.chip:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.3);
    color: #fff;
    transform: translateY(-2px);
}

/* ── Results Container ── */
.results-area {
    width: 100%;
    padding-bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 32px;
}

/* ── Answer Box (AI Output) ── */
.answer-box {
    padding: 32px;
    background: linear-gradient(
        145deg,
        rgba(20, 25, 35, 0.8),
        rgba(5, 7, 10, 0.9)
    );
}
.answer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 16px;
}
.answer-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.badge-grounded {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid rgba(16, 185, 129, 0.2);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── AI Output Font Update (Inter, refined for math/reading) ── */
.answer-text {
    font-family: "Inter", system-ui, sans-serif;
    font-size: 1.05rem;
    line-height: 1.85;
    color: #e2e8f0;
    font-weight: 400;
    letter-spacing: 0.01em;
}
.answer-text strong {
    color: #fff;
    font-weight: 600;
}

/* ── Stats ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.stat-card {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: rgba(255, 255, 255, 0.02);
}
.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.1em;
}
.stat-value {
    font-size: 1.5rem;
    font-family: "JetBrains Mono", monospace;
    font-weight: 700;
    color: #fff;
}

/* ── Citations (Smaller Cards) ── */
.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin: 16px 0;
}
.citations-grid {
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(240px, 1fr)
    ); /* Reduced to fit more */
    gap: 16px; /* Reduced gap */
}
.citation-card {
    padding: 16px; /* Reduced padding */
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px; /* Reduced radius */
    transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    gap: 12px; /* Reduced gap */
    position: relative;
}
.citation-card:hover {
    background: rgba(20, 20, 20, 0.8);
    border-color: var(--accent-2);
    transform: translateY(-4px); /* Smoother smaller lift */
    box-shadow: 0 10px 20px rgba(138, 43, 226, 0.15);
}
.citation-open {
    position: absolute;
    top: 16px;
    right: 16px;
    color: var(--accent-2);
    opacity: 0;
    transition: 0.3s;
    transform: translateX(-5px);
}
.citation-card:hover .citation-open {
    opacity: 1;
    transform: translateX(0);
}

.citation-meta {
    display: flex;
    gap: 10px;
    align-items: center;
}
.citation-id {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem; /* Smaller */
    background: rgba(138, 43, 226, 0.15);
    color: #d8b4fe;
    padding: 4px 8px; /* Smaller */
    border-radius: 6px;
    border: 1px solid rgba(138, 43, 226, 0.3);
}
.citation-date {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem; /* Smaller */
    color: var(--text-muted);
}
.citation-title {
    font-size: 0.95rem; /* Smaller reading title */
    font-weight: 600;
    color: #f8fafc;
    line-height: 1.4;
    padding-right: 20px;
}
.citation-authors {
    font-size: 0.8rem; /* Smaller */
    color: var(--text-muted);
    font-style: italic;
    font-weight: 300;
}

/* ── Loader ── */
.loader-view {
    padding: 80px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}
.ring-spinner {
    width: 70px;
    height: 70px;
    position: relative;
}
.ring {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 50%;
}
.ring-1 {
    border-top-color: var(--accent);
    animation: spin1 1.5s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}
.ring-2 {
    border-right-color: var(--accent-2);
    animation: spin2 2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}
@keyframes spin1 {
    to {
        transform: rotate(360deg);
    }
}
@keyframes spin2 {
    to {
        transform: rotate(-360deg);
    }
}

/* ── Year Stepper ── */
.year-stepper {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: 0.2s;
}
.year-stepper:hover {
    border-color: rgba(255, 255, 255, 0.3);
}
.year-stepper:focus-within {
    border-color: var(--accent);
}
.stepper-btn {
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--accent);
    font-weight: 700;
    transition: 0.2s;
    user-select: none;
}
.stepper-btn:hover {
    background: rgba(0, 240, 255, 0.15);
    color: #fff;
}
.stepper-input {
    width: 50px;
    text-align: center;
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.95rem;
    pointer-events: none;
}
.stepper-input::-webkit-outer-spin-button,
.stepper-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.stepper-input[type=number] {
    -moz-appearance: textfield;
}

/* ── Professional Header Layout ── */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    padding: 24px 2%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 5000;
    background: transparent;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #fff;
}
.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 10px;
    color: var(--accent);
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.github-link {
    color: var(--text-muted);
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.github-link:hover {
    color: #fff;
    transform: scale(1.1);
}
.nav-status {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: 0.3s;
}
.nav-status:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #666;
}
.status-online {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}
.status-offline {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger);
}

/* Custom overrides */
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: none;
}

/* ── Info Modal ── */
.info-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 24px;
}
.info-modal {
    position: relative;
    width: 100%;
    max-width: 650px;
    padding: 40px;
    background: linear-gradient(145deg, rgba(12, 16, 24, 0.9), rgba(5, 7, 10, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.1), inset 0 0 80px rgba(0, 240, 255, 0.03);
    border-radius: 24px;
    overflow-y: auto;
    max-height: 85vh;
}
.info-modal h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 6px;
    background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}
.info-modal h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-top: 32px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.info-modal h3 svg {
    color: var(--accent);
}
.info-modal p, .info-modal ul {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}
.info-modal ul {
    list-style-type: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.info-modal li {
    margin: 0;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    transition: 0.3s;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.info-modal li:hover {
    background: rgba(0, 240, 255, 0.05);
    border-color: rgba(0, 240, 255, 0.2);
    color: #fff;
    transform: translateX(4px);
}
.info-modal li strong {
    color: var(--accent);
    display: block;
    font-size: 0.95rem;
    margin-bottom: 4px;
}
.info-modal hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.4), transparent);
    margin: 30px 0;
}
.modal-close {
    position: absolute;
    top: 24px;
    right: 24px;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.modal-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
    transform: rotate(90deg);
}
.nav-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    transition: 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.nav-icon-btn:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.4);
    color: var(--accent);
    transform: translateY(-2px);
}

/* -- UI Redesign -- */
.layout-wrapper { display: flex; height: 100vh; width: 100vw; overflow: hidden; }
.sidebar { width: 260px; background: rgba(5, 7, 10, 0.95); border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow-y: auto; padding: 10px; z-index: 100; flex-shrink: 0; transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s ease, padding 0.3s ease, margin 0.3s ease; white-space: nowrap; overflow-x: hidden; }
.sidebar.collapsed { width: 0 !important; padding: 0 !important; border: none; opacity: 0; margin-left: -1px; }
@media (max-width: 768px) { .sidebar { position: fixed; height: 100vh; transform: translateX(-100%); width: 260px !important; opacity: 1 !important; padding: 10px !important; } .sidebar.open { transform: translateX(0); } }
.sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 90; }
.new-chat-btn { display: flex; align-items: center; gap: 10px; width: 100%; padding: 12px; border-radius: 8px; background: rgba(255,255,255,0.05); color: #fff; font-weight: 500; font-size: 0.9rem; margin-bottom: 20px; transition: 0.2s; border: 1px solid rgba(255,255,255,0.1); }
.new-chat-btn:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }
.history-item { padding: 10px; border-radius: 6px; font-size: 0.85rem; color: var(--text-muted); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: 0.2s; }
.history-item:hover, .history-item.active { background: rgba(255,255,255,0.05); color: #fff; }

.main-chat-area { flex: 1; display: flex; flex-direction: column; position: relative; height: 100vh; overflow-y: auto; overflow-x: hidden; scroll-behavior: smooth; }
.chat-container { flex: 1; padding: 80px 20px 140px 20px; display: flex; flex-direction: column; gap: 24px; max-width: 900px; margin: 0 auto; width: 100%; }

.message-user { align-self: flex-end; background: rgba(255,255,255,0.1); color: #fff; padding: 12px 18px; border-radius: 20px; border-bottom-right-radius: 4px; max-width: 80%; }
.message-ai { align-self: flex-start; background: transparent; color: #e2e8f0; border-radius: 12px; width: 100%; }

.bottom-input-bar { position: fixed; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(3,5,8,0.9) 20%); padding: 20px; display: flex; justify-content: center; z-index: 50; pointer-events: none; }
@media (min-width: 769px) { .bottom-input-bar { left: 260px; } }
.bottom-input-bar-inner { width: 100%; max-width: 800px; display: flex; flex-direction: column; gap: 8px; pointer-events: auto; }

.hamburger { display: none; }
@media (max-width: 768px) { .hamburger { display: flex; z-index: 200; position: fixed; top: 16px; left: 16px; width: 40px; height: 40px; border-radius: 8px; background: rgba(255,255,255,0.1); align-items: center; justify-content: center; backdrop-filter: blur(10px); } }

/* Code Block */
.code-header { display: flex; justify-content: space-between; align-items: center; background: #282c34; padding: 4px 12px; border-top-left-radius: 8px; border-top-right-radius: 8px; font-family: monospace; font-size: 0.8rem; color: #abb2bf; }
.code-wrapper { border-radius: 8px; overflow: hidden; margin: 12px 0; border: 1px solid rgba(255,255,255,0.1); }
.code-wrapper pre { margin: 0 !important; border-radius: 0 !important; }

/* Citations Pill */
.citation-badge { display: inline-flex; align-items: center; justify-content: center; background: #3b82f6; color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 12px; font-weight: 600; cursor: pointer; text-decoration: none; vertical-align: super; line-height: 1; margin: 0 2px; }
.citation-badge:hover { background: #2563eb; }

/* Feedback row */
.feedback-row { display: flex; align-items: center; gap: 12px; margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1); }
.star-btn { color: #4b5563; transition: 0.2s; cursor: pointer; }
.star-btn:hover, .star-btn.active { color: #f59e0b; }
.feedback-input { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); padding: 6px 12px; border-radius: 6px; font-size: 0.85rem; color: #fff; flex: 1; }
.feedback-submit { background: var(--accent); color: #000; padding: 6px 16px; border-radius: 6px; font-weight: 600; font-size: 0.85rem; }

.blinking-cursor { display: inline-block; width: 8px; height: 16px; background: #fff; animation: blink 1s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }


/* -- Additional UI Enhancements -- */
.top-api-status { position: fixed; right: 24px; top: 16px; z-index: 50; }
.hero-icon-container { width: 90px; height: 90px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; background: rgba(0,240,255,0.05); border: 1px solid rgba(0,240,255,0.2); border-radius: 20px; box-shadow: 0 0 40px rgba(0,240,255,0.1); }
.ai-avatar { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: rgba(0,240,255,0.1); border-radius: 6px; box-shadow: 0 0 15px rgba(0,240,255,0.2); }
.model-badge { font-family: "JetBrains Mono", monospace; font-size: 0.65rem; color: #fff; background: rgba(138,43,226,0.5); padding: 3px 8px; border-radius: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; border: 1px solid rgba(138,43,226,0.8); }

/* Improved Chat Bubbles */
.message-user {
    background: linear-gradient(135deg, rgba(30,58,138,0.6), rgba(88,28,135,0.6)) !important;
    border: 1px solid rgba(255,255,255,0.1) !important;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.chat-input-wrapper { background: rgba(20,25,35,0.8) !important; backdrop-filter: blur(20px); border: 1px solid rgba(0,240,255,0.2) !important; }
.chat-input-wrapper:focus-within { background: rgba(25,30,45,0.95); border-color: var(--accent); box-shadow: 0 0 30px rgba(0, 240, 255, 0.2), 0 8px 30px rgba(0, 0, 0, 0.6); }

.send-btn { background: #fff !important; border: none; outline: none; }
.send-btn:hover:not(:disabled) { background: var(--accent) !important; color: #000; box-shadow: 0 0 20px rgba(0,240,255,0.5); }


/* Scrollbar Styling at the Edge */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* History Actions */
.history-item { position: relative; display: flex; align-items: center; padding: 10px; border-radius: 6px; font-size: 0.85rem; color: var(--text-muted); cursor: pointer; white-space: nowrap; transition: 0.2s; overflow: hidden; }
.history-item:hover, .history-item.active { background: rgba(255,255,255,0.05); color: #fff; }
.history-actions { display: none; gap: 8px; align-items: center; background: rgba(10, 14, 23, 0.9); padding-left: 8px; border-radius: 4px; box-shadow: -10px 0 10px rgba(10, 14, 23, 0.9); }
.history-item:hover .history-actions { display: flex; }
.history-actions svg { color: var(--text-muted); cursor: pointer; transition: 0.2s; }
.history-actions svg:hover { color: #fff; transform: scale(1.1); }
.history-actions .active-pin { color: var(--accent); }
.history-actions .action-delete:hover { color: var(--danger); }

/* Thinking Animation */
.thinking-indicator { display: flex; align-items: center; gap: 4px; padding: 12px 18px; }
.typing-dot { width: 6px; height: 6px; background-color: var(--accent); border-radius: 50%; opacity: 0.4; animation: type-bounce 1.4s infinite cubic-bezier(0.2, 0.8, 0.2, 1); }
.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; }
@keyframes type-bounce { 0%, 100% { transform: translateY(0); opacity: 0.4; } 50% { transform: translateY(-4px); opacity: 1; } }

/* Markdown Body Reset */
.markdown-body { font-family: "Inter", system-ui, sans-serif; font-size: 1.05rem; line-height: 1.7; color: #e2e8f0; }
.markdown-body p { margin-bottom: 1em; }
.markdown-body p:last-child { margin-bottom: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { color: #fff; font-weight: 700; margin-top: 1.5em; margin-bottom: 0.5em; }
.markdown-body ul { list-style-type: disc; padding-left: 20px; margin-bottom: 1em; }
.markdown-body ol { list-style-type: decimal; padding-left: 20px; margin-bottom: 1em; }
.markdown-body li { margin-bottom: 0.25em; }
.markdown-body strong { color: #fff; font-weight: 600; }
.markdown-body .inline-code { background: rgba(0,0,0,0.5); padding: 2px 6px; border-radius: 4px; font-family: "JetBrains Mono", monospace; font-size: 0.9em; color: var(--accent); }


/* KaTeX Overrides for strict centering and sizing */
.markdown-body .katex-display {
    display: block !important;
    text-align: center !important;
    margin: 1.5rem 0 !important;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px 0;
}
.markdown-body .katex {
    font-size: 1.1em;
}


/* Desktop Sidebar Toggle */
.sidebar.collapsed { width: 0px !important; padding: 0 !important; border: none !important; opacity: 0; }
.desktop-toggle-sidebar { position: fixed; left: 16px; top: 16px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 8px; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-muted); z-index: 40; transition: 0.2s; backdrop-filter: blur(10px); }
.desktop-toggle-sidebar:hover { background: rgba(255,255,255,0.1); color: #fff; }
@media (max-width: 768px) { .desktop-toggle-sidebar { display: none; } }

/* Scroll Down Button */
.scroll-down-btn { position: fixed; right: 40px; bottom: 160px; background: rgba(0,0,0,0.7); border: 1px solid rgba(255,255,255,0.2); border-radius: 50%; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; color: #fff; cursor: pointer; z-index: 50; backdrop-filter: blur(5px); transition: 0.2s; box-shadow: 0 4px 15px rgba(0,0,0,0.5); }
.scroll-down-btn:hover { background: rgba(30,30,40,0.9); transform: translateY(-2px); border-color: rgba(255,255,255,0.4); }

/* Sidebar Footer */
.sidebar-footer { padding: 12px; margin-top: auto; border-top: 1px solid rgba(255,255,255,0.05); }
.github-link { display: flex; align-items: center; gap: 10px; color: var(--text-muted); text-decoration: none; font-size: 0.85rem; padding: 8px; border-radius: 6px; transition: 0.2s; }
.github-link:hover { background: rgba(255,255,255,0.05); color: #fff; }