/* ====== Dark Manuscript Aesthetic ====== */
:root {
    --bg: #1a1a1a;
    --surface: #242424;
    --surface-light: #2e2e2e;
    --border: #3d3d3d;
    --fg: #e8e3d9;
    --muted: #9e9482;
    --accent: #d4a853;       /* warm gold */
    --accent-soft: rgba(212,168,83,0.12);
    --danger: #c0392b;
    --code-bg: #2a241c;
    --code-fg: #e6d5b8;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 6px;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --transition: 0.2s ease;
}

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-serif);
    line-height: 1.7;
    font-size: 1.05rem;
    -webkit-font-smoothing: antialiased;
    margin: 0;
    padding: 0;
}

/* Header - FIXED responsive */
.site-header {
    background: #1e1e1e;
    border-bottom: 1px solid var(--border);
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.logo {
    color: var(--fg);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.logo-accent { color: var(--accent); font-weight: 700; }
.main-nav {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    flex-wrap: wrap;
}
.main-nav a {
    color: var(--muted);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: color var(--transition);
    padding: 0.3rem 0;
    border-bottom: 2px solid transparent;
}
.main-nav a:hover { color: var(--fg); border-bottom-color: var(--accent); }

/* Layout - FIXED container responsiveness */
.container {
    max-width: 850px;
    margin: 2rem auto 0;
    padding: 0 1.2rem 2rem;
    width: 100%;
}
.enterprise-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    width: 100%;
}
.enterprise-content::before {
    content: attr(data-label);
    position: absolute;
    top: -14px;
    left: 20px;
    background: var(--bg);
    color: var(--accent);
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    padding: 0 10px;
    font-weight: 600;
    text-transform: none;
    white-space: nowrap;
}

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-serif); color: #f0ebdd; }
h1 {
    font-size: 1.9rem;
    margin-bottom: 1rem;
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    word-break: break-word;
}
h2 { font-size: 1.35rem; margin: 2rem 0 0.8rem; color: var(--accent); }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.6rem; color: #e0d3b8; }
p { margin-bottom: 1.2rem; color: #d5cfc3; }
a { color: var(--accent); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }
strong { color: #f5eedf; font-weight: 600; }
em { color: var(--accent); font-style: italic; }
code {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 0.2em 0.5em;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* Lists */
ul, ol {
    padding-left: 1.6rem;
    margin-bottom: 1.2rem;
}
li {
    margin-bottom: 0.5rem;
}

/* Toolbar - FIXED responsive stacking */
.action-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 0.8rem;
}
.tts-engine-widget {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.tts-btn {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.tts-btn:hover { background: var(--accent); color: #1a1a1a; }
.tts-btn.active-speaking {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
    animation: softPulse 2s infinite;
}
@keyframes softPulse { 0%,100%{ box-shadow: 0 0 0 0 rgba(192,57,43,0.4); } 50%{ box-shadow: 0 0 0 8px rgba(192,57,43,0); } }
.voice-indicator { font-size: 0.8rem; color: var(--muted); min-width: 200px; font-family: var(--font-mono); }
.voice-selector {
    background: var(--surface-light);
    color: var(--fg);
    border: 1px solid var(--border);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    max-width: 220px;
    cursor: pointer;
    width: auto;
}
.section-nav-links {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}
.nav-btn {
    color: var(--muted);
    text-decoration: none;
    padding: 0.4rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface-light);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.8rem;
    transition: all var(--transition);
    white-space: nowrap;
}
.nav-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--surface); }

/* Callouts */
.callout-block {
    border: 1px solid;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: var(--radius);
    font-family: var(--font-serif);
}
.warning-callout { border-color: var(--danger); background: rgba(192,57,43,0.05); }
.summary-callout { border-color: var(--accent); background: rgba(212,168,83,0.05); }
.callout-label {
    font-weight: 700;
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Table - FIXED horizontal scroll on small screens */
.spec-matrix-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    min-width: 600px;
}
.table-responsive-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -1rem;
    padding: 0 1rem;
    width: calc(100% + 2rem);
    max-width: calc(100% + 2rem);
}
@media (max-width: 768px) {
    .table-responsive-wrapper {
        margin: 0 -0.5rem;
        padding: 0 0.5rem;
    }
}
.spec-matrix-table th, .spec-matrix-table td {
    border: 1px solid var(--border);
    padding: 0.6rem 0.8rem;
    text-align: left;
    font-size: 0.9rem;
}
.spec-matrix-table th { background: var(--surface-light); color: var(--accent); font-weight: 600; }
.glyph-cell { font-size: 1.5rem; color: var(--accent); }

/* Code box - FIXED overflow */
.code-output-box {
    background: #2a241c;
    border: 1px solid var(--border);
    color: var(--code-fg);
    padding: 1rem;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    margin: 1rem 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: pre-wrap;
    word-break: break-word;
}
.code-output-box pre,
.code-output-box code {
    background: transparent;
    padding: 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: inherit;
}

/* SVG Diagram */
.svg-wrapper { margin: 2rem 0; }
.responsive-svg-render { width: 100%; max-width: 800px; display: block; margin: 0 auto; height: auto; }
.diagram-caption { text-align: center; font-size: 0.8rem; color: var(--muted); margin-top: 0.8rem; }

/* Floating TTS Controller - FIXED responsive */
.floating-tts-controller {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--surface);
    border: 1px solid var(--accent);
    border-radius: 16px;
    padding: 0.8rem 1.4rem;
    display: flex;
    align-items: center;
    gap: 18px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.6);
    z-index: 9999;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
}
.floating-tts-controller.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.float-btn {
    background: transparent;
    border: none;
    color: var(--accent);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    transition: background var(--transition);
    line-height: 1;
}
.float-btn:hover { background: var(--accent-soft); }
.float-btn.close-btn {
    color: var(--muted);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    padding: 0;
    font-size: 1rem;
    position: absolute;
    top: -12px;
    right: -12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.float-btn.close-btn:hover { background: var(--danger); border-color: var(--danger); color: #fff; }

/* Pagination & Footer - FIXED responsive */
.pagination-container-block {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.web-footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem 0;
    color: var(--muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

/* Utility */
.meta-tag {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.horizontal-divider { height: 1px; background: var(--border); margin: 1rem 0; }
.book-only { display: none; }


/* ===== Universal Mobile Adaptations ===== */
@media (max-width: 768px) {
    :root {
        --radius: 4px;
    }
    body {
        font-size: 0.95rem;
        padding: 0;
    }
    .container {
        padding: 0 0.6rem 1.5rem;
        margin-top: 1.2rem;
    }
    .enterprise-content {
        padding: 1.2rem 0.8rem !important;
        border-radius: 4px;
    }
    .enterprise-content::before {
        font-size: 0.55rem;
        left: 12px;
        top: -12px;
        padding: 0 6px;
        white-space: nowrap;
    }
    h1 {
        font-size: 1.5rem;
        padding-left: 0.8rem;
    }
    h2 { font-size: 1.15rem; }
    h3 { font-size: 1rem; }
    .logo {
        font-size: 0.75rem;
        gap: 0.2rem;
    }
    .main-nav {
        gap: 0.4rem;
    }
    .main-nav a {
        font-size: 0.6rem;
    }
    .action-toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 0.8rem;
        gap: 0.6rem;
    }
    .tts-engine-widget {
        flex-wrap: wrap;
        justify-content: center;
    }
    .tts-btn {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
        white-space: nowrap;
    }
    .voice-indicator {
        min-width: auto;
        font-size: 0.7rem;
    }
    .voice-selector {
        max-width: 140px;
        font-size: 0.7rem;
        padding: 0.3rem 0.5rem;
    }
    .section-nav-links {
        justify-content: center;
        width: 100%;
    }
    .nav-btn {
        font-size: 0.7rem;
        padding: 0.3rem 0.7rem;
        white-space: nowrap;
    }
    .pagination-container-block {
        flex-direction: column;
        align-items: stretch;
        gap: 0.8rem;
        padding-top: 1.2rem;
        margin-top: 1.2rem;
    }
    .spec-matrix-table th,
    .spec-matrix-table td {
        padding: 0.4rem 0.5rem;
        font-size: 0.8rem;
    }
    .spec-matrix-table {
        min-width: 480px;
    }
    .callout-block {
        padding: 1rem;
        margin: 1.2rem 0;
    }
    .code-output-box {
        padding: 0.8rem;
        font-size: 0.85rem;
    }
    .svg-wrapper {
        margin: 1.2rem 0;
    }
    .diagram-caption {
        font-size: 0.7rem;
    }
    .floating-tts-controller {
        bottom: 10px !important;
        right: 10px !important;
        padding: 0.4rem 0.8rem !important;
        border-radius: 12px !important;
        gap: 10px !important;
    }
    .float-btn {
        font-size: 1rem !important;
        padding: 0.2rem 0.4rem !important;
    }
    .float-btn.close-btn {
        width: 24px;
        height: 24px;
        top: -10px;
        right: -10px;
        font-size: 0.8rem;
    }
    .web-footer {
        font-size: 0.7rem;
        padding: 1rem 0;
        margin-top: 2rem;
    }
    ul, ol {
        padding-left: 1.2rem;
    }
    li {
        margin-bottom: 0.3rem;
    }
    .header-inner {
        height: auto;
        padding: 0.5rem 0;
    }
    .site-header {
        padding: 0 0.6rem;
    }
}

/* ===== Extra small devices ===== */
@media (max-width: 480px) {
    body {
        font-size: 0.9rem;
    }
    .container {
        padding: 0 0.4rem 1rem;
    }
    .enterprise-content {
        padding: 0.8rem 0.6rem !important;
    }
    h1 {
        font-size: 1.2rem;
        padding-left: 0.6rem;
    }
    h2 { font-size: 1rem; }
    .logo {
        font-size: 0.65rem;
    }
    .main-nav a {
        font-size: 0.55rem;
    }
    .tts-btn {
        font-size: 0.65rem;
        padding: 0.3rem 0.6rem;
    }
    .nav-btn {
        font-size: 0.6rem;
        padding: 0.2rem 0.5rem;
    }
    .spec-matrix-table {
        min-width: 360px;
    }
    .spec-matrix-table th,
    .spec-matrix-table td {
        padding: 0.3rem 0.4rem;
        font-size: 0.7rem;
    }
    .code-output-box {
        padding: 0.6rem;
        font-size: 0.75rem;
    }
    .callout-block {
        padding: 0.8rem;
    }
    .floating-tts-controller {
        padding: 0.3rem 0.6rem !important;
        gap: 6px !important;
        border-radius: 10px !important;
        bottom: 6px !important;
        right: 6px !important;
    }
    .float-btn {
        font-size: 0.85rem !important;
        padding: 0.15rem 0.3rem !important;
    }
}