:root {
    --primary-color: #5E35B1; /* psycho.msk.ru signature deep purple */
    --primary-hover: #4527A0;
    --primary-light: #F3E5F5;
    --bg-gradient: linear-gradient(135deg, #F9F7FA 0%, #FFFFFF 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-main: #2C2C2C;
    --text-muted: #717171;
    --border-color: rgba(94, 53, 177, 0.15);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    min-height: 100vh;
    background-attachment: fixed;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
    animation: fadeDown 0.6s ease-out;
}

.logo {
    font-size: 42px;
    margin-bottom: 16px;
    text-shadow: 0 4px 12px rgba(94, 53, 177, 0.15);
}

h1 {
    font-size: 42px;
    font-weight: 800;
    margin: 0 0 16px 0;
    background: linear-gradient(135deg, #311B92, #5E35B1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

header p {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto;
    font-weight: 400;
}

.search-container {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 16px 40px rgba(94, 53, 177, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.5);
    margin-bottom: 30px;
    position: relative;
    z-index: 10;
}

#query-form {
    display: flex;
    gap: 16px;
}

#query-input {
    flex: 1;
    padding: 20px 28px;
    font-size: 17px;
    border: 2px solid transparent;
    border-radius: 14px;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(243, 229, 245, 0.3);
    color: var(--text-main);
}

#query-input::placeholder { color: #A0A0A0; }

#query-input:focus {
    background: #FFFFFF;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 5px rgba(94, 53, 177, 0.1);
}

button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: none;
    padding: 0 36px;
    font-size: 17px;
    font-weight: 600;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(94, 53, 177, 0.25);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(94, 53, 177, 0.35);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background: #D1D1D1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.hidden {
    display: none !important;
}

/* Suggestions */
.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
    justify-content: center;
}

.suggestion-chip {
    background: var(--primary-light);
    color: var(--primary-hover);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid rgba(94, 53, 177, 0.1);
}

.suggestion-chip:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(94, 53, 177, 0.2);
}

/* Results */
.results-area {
    margin-top: 40px;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.response-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(94, 53, 177, 0.08);
    border: 1px solid rgba(255,255,255,0.6);
    border-top: 6px solid var(--primary-color);
}

.response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.response-title {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.copy-btn {
    background: var(--primary-light);
    color: var(--primary-color);
    min-width: auto;
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: none;
}

.copy-btn:hover {
    background: #E1BEE7;
    color: var(--primary-hover);
    transform: none;
    box-shadow: none;
}

/* Health banner (показывается, когда база знаний недоступна) */
.health-banner {
    background: #FFF4E5;
    color: #8A4B00;
    border-bottom: 1px solid #FFD8A8;
    padding: 12px 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
}
.health-banner strong { color: #6B3A00; }

/* Feedback row (👍 / 👎 на ответе) */
.feedback-row {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px dashed var(--border-color);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.feedback-prompt {
    color: var(--text-muted);
    font-size: 14px;
    margin-right: 4px;
}
.fb-btn {
    background: var(--primary-light);
    color: var(--primary-hover);
    border: 1px solid rgba(94, 53, 177, 0.15);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 10px;
    min-width: auto;
    cursor: pointer;
    box-shadow: none;
    transition: all 0.2s ease;
}
.fb-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(94, 53, 177, 0.2);
}
.feedback-thanks {
    color: #2E7D32;
    font-size: 14px;
    font-weight: 600;
}

.error-area {
    margin-top: 40px;
    background: #FFF1F0;
    border: 1px solid #FFA39E;
    color: #CF1322;
    padding: 24px;
    border-radius: 16px;
    text-align: center;
    font-weight: 500;
}

/* Markdown Styles inside response card */
#markdown-content h1, #markdown-content h2, #markdown-content h3 {
    margin-top: 32px;
    margin-bottom: 16px;
    color: #141414;
    font-weight: 700;
}

#markdown-content h1 { font-size: 26px; }
#markdown-content h2 { 
    font-size: 22px; 
    display: flex;
    align-items: center;
    gap: 10px;
}
#markdown-content h2::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

#markdown-content p {
    margin-bottom: 18px;
    font-size: 16px;
    color: #333333;
}

#markdown-content ul, #markdown-content ol {
    margin-bottom: 20px;
    padding-left: 28px;
}

#markdown-content li {
    margin-bottom: 10px;
    font-size: 16px;
}

#markdown-content li::marker {
    color: var(--primary-color);
    font-weight: bold;
}

#markdown-content strong {
    color: #141414;
    font-weight: 700;
}

#markdown-content code {
    background: var(--primary-light);
    color: var(--primary-hover);
    padding: 4px 8px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
}

/* Navigator Styles */
.navigator-container { 
    margin-top: 60px; 
    border-top: 1px solid var(--border-color); 
    padding-top: 40px; 
}
.nav-title { 
    font-size: 28px; 
    font-weight: 800; 
    color: #141414; 
    margin-bottom: 30px; 
    text-align: center; 
}
.nav-section { 
    margin-bottom: 30px; 
    background: var(--card-bg); 
    border-radius: 16px; 
    box-shadow: 0 8px 24px rgba(94, 53, 177, 0.05); 
    border: 1px solid rgba(255,255,255,0.8);
    overflow: hidden; 
}
.nav-section-title { 
    background: linear-gradient(135deg, rgba(94,53,177,0.05), rgba(94,53,177,0.02));
    backdrop-filter: blur(10px);
    padding: 20px 24px; 
    font-size: 20px; 
    font-weight: 700; 
    margin: 0; 
    border-bottom: 1px solid var(--border-color); 
    color: var(--primary-color); 
}
.nav-item { 
    border-bottom: 1px solid rgba(0,0,0,0.04); 
}
.nav-item:last-child { border-bottom: none; }
.nav-item summary { 
    padding: 18px 24px; 
    font-weight: 600; 
    font-size: 16px;
    cursor: pointer; 
    list-style: none; 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    transition: all 0.2s; 
}
.nav-item summary::-webkit-details-marker { display: none; }
.nav-item summary::after { 
    content: "↓"; 
    color: var(--text-muted); 
    font-size: 18px; 
    font-weight: 700; 
    transition: transform 0.3s cubic; 
}
.nav-item[open] summary::after { 
    transform: rotate(180deg); 
    color: var(--primary-color); 
}
.nav-item summary:hover { 
    background: rgba(94,53,177,0.02); 
    color: var(--primary-color);
}
.nav-item[open] summary { 
    background: var(--primary-light); 
    color: var(--primary-hover); 
    border-bottom: 1px dashed rgba(94, 53, 177, 0.2); 
}
.nav-content { 
    padding: 24px; 
    background: #FFFFFF; 
    font-size: 15px; 
    line-height: 1.7;
    animation: slideDown 0.3s ease-out;
}
.nav-content p { margin-bottom: 12px; }
.nav-content blockquote { 
    padding: 16px 20px; 
    background: #FFF8E1; 
    border-left: 5px solid #FFC107; 
    margin: 20px 0; 
    border-radius: 6px; 
    font-size: 15px;
    color: #5D4037;
}

/* Animations */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Spinner Animation */
.spinner {
    animation: rotate 2s linear infinite;
    z-index: 2;
    width: 24px;
    height: 24px;
}

.spinner .path {
    stroke: #FFFFFF;
    stroke-linecap: round;
    animation: dash 1.5s ease-in-out infinite;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

@keyframes dash {
    0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
    50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
    100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
}

/* Mobile: ≤ 720px */
@media (max-width: 720px) {
    .container { padding: 30px 14px; }
    .logo { font-size: 32px; margin-bottom: 12px; }
    h1 { font-size: 28px; letter-spacing: -0.5px; }
    header { margin-bottom: 32px; }
    header p { font-size: 15px; }

    .search-container { padding: 14px; border-radius: 16px; }
    #query-form { flex-direction: column; gap: 12px; }
    #query-input { padding: 16px 20px; font-size: 16px; }
    button { width: 100%; padding: 14px 24px; min-width: 0; }

    .suggestions { gap: 8px; margin-bottom: 28px; }
    .suggestion-chip { padding: 8px 14px; font-size: 13px; }

    .response-card { padding: 24px 18px; border-radius: 18px; }
    .response-header { margin-bottom: 18px; padding-bottom: 14px; }
    .response-title { font-size: 13px; letter-spacing: 0.5px; }
    .copy-btn { font-size: 12px; padding: 6px 12px; }

    #markdown-content h1 { font-size: 20px; }
    #markdown-content h2 { font-size: 18px; }
    #markdown-content p,
    #markdown-content li { font-size: 15px; }

    .feedback-row { gap: 10px; padding-top: 16px; margin-top: 18px; }
    .feedback-prompt { flex-basis: 100%; }
    .fb-btn { flex: 1; }

    .navigator-container { margin-top: 40px; padding-top: 30px; }
    .nav-title { font-size: 22px; margin-bottom: 22px; }
    .nav-section-title { padding: 16px 18px; font-size: 17px; }
    .nav-item summary { padding: 14px 18px; font-size: 15px; }
    .nav-content { padding: 18px; font-size: 14px; }

    .error-area { padding: 18px; font-size: 14px; margin-top: 28px; }
}

/* Very narrow: ≤ 380px */
@media (max-width: 380px) {
    .container { padding: 24px 10px; }
    h1 { font-size: 24px; }
    .response-card { padding: 18px 14px; }
}