/* ══════════════════════════════════════════════════════════
   thalabus shared design tokens
   Loaded by all pages via <link rel="stylesheet" href="/css/styles.css">
   ══════════════════════════════════════════════════════════ */

/* ── Museo Modern font faces ─────────────────────────────── */
@font-face {
    font-family: 'Museo Modern';
    src: url('/resources/fonts/MuseoModerno/static/MuseoModerno-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
}
@font-face {
    font-family: 'Museo Modern';
    src: url('/resources/fonts/MuseoModerno/static/MuseoModerno-SemiBold.ttf') format('truetype');
    font-weight: 600;
    font-style: normal;
}
@font-face {
    font-family: 'Museo Modern';
    src: url('/resources/fonts/MuseoModerno/static/MuseoModerno-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
}

/* ── Design tokens ───────────────────────────────────────── */
:root {
    /* Neutral scale */
    --color-primary-0:          #FAFAF8;
    --color-primary-1:          #ECECEC;
    --color-primary-2:          #A0A0A0;
    --color-primary-3:          #4A4A4A;
    --color-primary-4:          #1C1C1C;

    /* Brand blue */
    --color-accent-0:           #3C82A4;
    --color-accent-1:           #4591b9;
    --color-accent-2:           #29576f;

    /* Logo / brand */
    --color-logo-text:          #213b56;
    --color-logo-bg:            #3C82A4;   /* alias used in template */
    --color-logo-background:    #3C82A4;   /* alias used in hub.css  */

    /* Misc surfaces */
    --color-border:             #ddd;
    --color-code-bg:            #f4f4f4;
    --color-table-alt:          #f9f9f9;
    --color-details-1:          #D8D8D8;

    /* Page-label accent colors */
    --color-label-hub:          #1B5E3F;
    --color-label-essentials:   #8B4FA0;
    --color-label-llm:          #29576f;
    --color-label-doc:          #29576f;
    --color-label-support:      #666666;
    --color-label-dashboard:    #C75B7A;
    --color-label-api:          #D97640;
    --color-label-sdk:          #3C82A4;
    --color-label-screenshots:  #0078D4;  /* Azure blue */
    --color-label-whitepapers:  #1B5E3F;  /* dark green */
    --color-label-hackathon:    #F00024;

    /* Keyword highlight colors */
    --color-keyword-brand:      #213b56;   /* "thalabus" brand keyword */
    --color-keyword-api:        #FF8C34;   /* "api" keyword            */
    --color-keyword-sdk:        #3C82A4;   /* "sdk" keyword            */

    /* Badge colors */
    --color-badge-wip:          #D74A1F;
    --color-badge-coming-soon:  #FF4500;
}

/* ══════════════════════════════════════════════════════════
   Chatbot Essentials page styles
   ══════════════════════════════════════════════════════════ */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-primary-4);
    background-color: var(--color-primary-0);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    background-image: linear-gradient(var(--color-primary-0), var(--color-primary-2)),
                      url('/resources/Background2.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: grayscale(60%) contrast(25%) brightness(125%) opacity(25%);
    background-blend-mode: multiply;
}

/* ── Navigation ─────────────────────────────────────────────────── */
.top-row {
    display: flex;
    height: 3.8rem;
    background-color: var(--color-primary-0);
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--color-primary-2);
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-box {
    width: 36px;
    height: 36px;
    background-color: var(--color-logo-background);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-image {
    width: 28px;
    height: 28px;
}

.logo-text a {
    text-decoration: none;
    color: var(--color-logo-text);
    font-family: 'Museo Modern', sans-serif;
    font-weight: 700;
    font-size: 1.9rem;
    display: flex;
    align-items: center;
    letter-spacing: -0.03em;
}

.page-label {
    margin-left: 0.5rem;
    font-size: 1.5rem;
    font-weight: 400;
    font-family: 'Museo Modern', sans-serif;
    display: inline-block;
    transform: translateY(0.1rem);
}

.page-label-hub        { color: var(--color-label-hub); }
.page-label-essentials { color: var(--color-label-essentials); }
.page-label-llm        { color: var(--color-label-llm); }
.page-label-api        { color: var(--color-label-api); }
.page-label-sdk        { color: var(--color-label-sdk); }
.page-label-support    { color: var(--color-label-support); }
.page-label-hackathon  { color: var(--color-label-hackathon); }

.home-link-icon {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    margin-left: 0.45rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.8;
    vertical-align: 0.05em;
    border-bottom: 1px solid currentColor;
}

.logo-text a:hover .home-link-icon,
.logo-text a:focus-visible .home-link-icon {
    opacity: 1;
}

.logo-text a:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 4px;
    border-radius: 2px;
}

.t2b-logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    text-decoration: none;
}

.t2b-logo-image {
    height: 40px;
    width: 80px;
    object-fit: contain;
}

/* ── Main layout ─────────────────────────────────────────────────── */
.container {
    flex: 1;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    padding: 2rem 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    color: var(--color-primary-4);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.page-header p {
    color: var(--color-primary-3);
    font-size: 1.1rem;
}

/* ── White content card ──────────────────────────────────────────── */
.content {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.content h1 {
    color: var(--color-logo-text);
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.content h2 {
    color: var(--color-logo-text);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.4rem;
}

.content h3 {
    color: var(--color-primary-4);
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.content h4 {
    color: var(--color-primary-4);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.content p {
    color: var(--color-primary-3);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.content ul,
.content ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary-3);
    line-height: 1.8;
}

.content li {
    margin-bottom: 0.25rem;
}

.content a {
    color: var(--color-accent-0);
    text-decoration: none;
    font-weight: 500;
}

.content a:hover {
    text-decoration: underline;
}

.content code {
    background-color: var(--color-code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9em;
    color: var(--color-primary-4);
}

.content pre {
    background-color: var(--color-code-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.content pre code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
}

.content blockquote {
    border-left: 4px solid var(--color-accent-0);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--color-primary-3);
    font-style: italic;
}

.content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.content th {
    background-color: var(--color-primary-1);
    color: var(--color-primary-4);
    padding: 0.6rem 0.8rem;
    text-align: left;
    border: 1px solid var(--color-border);
    font-weight: 600;
}

.content td {
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--color-border);
    color: var(--color-primary-3);
    line-height: 1.6;
    vertical-align: top;
}

.content tr:nth-child(even) td {
    background-color: var(--color-table-alt);
}

.content hr {
    border: none;
    border-top: 2px solid var(--color-primary-2);
    margin: 2rem 0;
}

.content strong {
    color: var(--color-primary-4);
}

/* ── Footer ──────────────────────────────────────────────────────── */
.footer {
    background-color: var(--color-primary-1);
    border-top: 1px solid var(--color-primary-2);
    padding: 1.5rem;
    text-align: center;
    color: var(--color-primary-3);
    font-size: 0.85rem;
    margin-top: auto;
}

.footer a {
    color: var(--color-accent-0);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .top-row    { padding: 0 1rem; height: 3.5rem; }
    .container  { padding: 1.5rem 1rem; }
    .page-header h1 { font-size: 1.5rem; }
    .content    { padding: 1.5rem; }
}