/* ═══════════════════════════════════════════════════════════════
   OceanWar Command Manual — Styles (In-App Screen)
   Matches the game's retro-terminal / WW2 nautical aesthetic
   All rules scoped to #manual-screen to avoid global conflicts
   ═══════════════════════════════════════════════════════════════ */

/* ── Screen Container ────────────────────────────────────────── */
#manual-screen {
    overflow-y: auto;
    height: 100%;
    background: linear-gradient(170deg, #0a0f18 0%, #0f1a2a 40%, #0a1220 100%);
    scroll-behavior: smooth;
    /* Override .screen.active centering — manual uses its own flex layout */
    align-items: stretch;
    justify-content: flex-start;
}

/* ── Scrollbar styling ───────────────────────────────────────── */
#manual-screen::-webkit-scrollbar { width: 6px; }
#manual-screen::-webkit-scrollbar-track { background: #0a0f18; }
#manual-screen::-webkit-scrollbar-thumb { background: #2a3a4a; border-radius: 3px; }
#manual-screen::-webkit-scrollbar-thumb:hover { background: #3a5a6a; }

/* ── Manual Container (flex layout for sidebar + content) ──── */
#manual-screen .manual-container {
    display: flex;
    min-height: 100%;
    width: 100%;
    color: #c0d8e8;
    font-family: 'Courier New', monospace;
}

/* ── Sidebar Navigation ──────────────────────────────────────── */
#manual-screen .manual-sidebar {
    position: sticky;
    top: 0;
    width: 260px;
    min-width: 260px;
    height: 100vh;
    background: linear-gradient(180deg, #0c1420 0%, #0a1018 100%);
    border-right: 1px solid rgba(0,255,136,0.15);
    overflow-y: auto;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

#manual-screen .manual-sidebar-header {
    padding: 20px 16px 12px;
    border-bottom: 1px solid rgba(0,255,136,0.15);
    text-align: center;
    flex-shrink: 0;
}

#manual-screen .manual-sidebar-title {
    font-size: 0.8rem;
    color: #00FF88;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin: 0 0 4px;
}

#manual-screen .manual-sidebar-sub {
    font-size: 0.65rem;
    color: #4a6a8a;
    letter-spacing: 1px;
}

#manual-screen .manual-nav {
    list-style: none;
    margin: 0; padding: 8px 0;
    flex: 1;
}

#manual-screen .manual-nav li {
    margin: 0;
}

#manual-screen .manual-nav a {
    display: block;
    padding: 10px 16px 10px 20px;
    color: #6a8faa;
    text-decoration: none;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

#manual-screen .manual-nav a:hover {
    color: #9bb8d3;
    background: rgba(0,255,136,0.04);
    border-left-color: rgba(0,255,136,0.3);
}

#manual-screen .manual-nav a.active {
    color: #00FF88;
    background: rgba(0,255,136,0.08);
    border-left-color: #00FF88;
}

#manual-screen .manual-nav a .nav-icon {
    display: inline-block;
    width: 22px;
    text-align: center;
    margin-right: 6px;
}

#manual-screen .manual-nav-divider {
    height: 1px;
    background: rgba(0,255,136,0.08);
    margin: 6px 16px;
}

#manual-screen .manual-sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(0,255,136,0.1);
    flex-shrink: 0;
}

#manual-screen .manual-back-btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid #4a6a8a;
    color: #6a8faa;
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
    letter-spacing: 1px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
}

#manual-screen .manual-back-btn:hover {
    border-color: #00FF88;
    color: #00FF88;
}

/* ── Main Content ────────────────────────────────────────────── */
#manual-screen .manual-content {
    flex: 1;
    padding: 0 40px 60px;
    max-width: 900px;
}

/* ── Hero Header ─────────────────────────────────────────────── */
#manual-screen .manual-hero {
    text-align: center;
    padding: 48px 0 32px;
    border-bottom: 1px solid rgba(0,255,136,0.12);
    margin-bottom: 32px;
}

#manual-screen .manual-hero-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

#manual-screen .manual-hero h1 {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 2rem;
    color: #e8c170;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin: 0 0 8px;
}

#manual-screen .manual-hero-sub {
    font-size: 0.85rem;
    color: #6a8faa;
    font-style: italic;
    margin: 0 0 16px;
}

#manual-screen .manual-hero-version {
    font-size: 0.7rem;
    color: #3a5a7a;
    letter-spacing: 1px;
}

/* ── Flow Overview ───────────────────────────────────────────── */
#manual-screen .manual-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    margin: 20px 0 0;
    flex-wrap: wrap;
}

#manual-screen .manual-flow-step {
    background: rgba(0,255,136,0.06);
    border: 1px solid rgba(0,255,136,0.15);
    padding: 6px 14px;
    font-size: 0.72rem;
    color: #9bb8d3;
    letter-spacing: 0.5px;
}

#manual-screen .manual-flow-arrow {
    color: #4a6a8a;
    font-size: 0.9rem;
}

/* ── Chapters ────────────────────────────────────────────────── */
#manual-screen .manual-chapter {
    margin-bottom: 48px;
    scroll-margin-top: 24px;
}

#manual-screen .manual-chapter-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0,255,136,0.12);
    cursor: pointer;
    user-select: none;
}

#manual-screen .manual-chapter-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
}

#manual-screen .manual-chapter-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.4rem;
    color: #e8c170;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin: 0;
    flex: 1;
}

#manual-screen .manual-chapter-toggle {
    color: #4a6a8a;
    font-size: 1rem;
    transition: transform 0.3s;
}

#manual-screen .manual-chapter.collapsed .manual-chapter-toggle {
    transform: rotate(-90deg);
}

#manual-screen .manual-chapter-body {
    overflow: hidden;
    transition: max-height 0.4s ease;
}

#manual-screen .manual-chapter.collapsed .manual-chapter-body {
    max-height: 0 !important;
    overflow: hidden;
}

/* ── Section Blocks ──────────────────────────────────────────── */
#manual-screen .manual-section {
    margin-bottom: 20px;
}

#manual-screen .manual-section h3 {
    font-size: 0.9rem;
    color: #00FF88;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin: 0 0 10px;
    padding-left: 8px;
    border-left: 2px solid rgba(0,255,136,0.3);
}

#manual-screen .manual-section p, #manual-screen .manual-section li {
    font-size: 0.82rem;
    line-height: 1.7;
    color: #a0b8cc;
}

#manual-screen .manual-section ul, #manual-screen .manual-section ol {
    padding-left: 20px;
    margin: 8px 0;
}

#manual-screen .manual-section li {
    margin-bottom: 4px;
}

/* ── Tables ──────────────────────────────────────────────────── */
#manual-screen .manual-table-wrap {
    overflow-x: auto;
    margin: 12px 0;
}

#manual-screen .manual-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

#manual-screen .manual-table th {
    background: rgba(0,255,136,0.08);
    color: #9bb8d3;
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid rgba(0,255,136,0.2);
    font-weight: normal;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.72rem;
}

#manual-screen .manual-table td {
    padding: 6px 10px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: #8aaccc;
}

#manual-screen .manual-table tr:hover td {
    background: rgba(0,255,136,0.03);
}

/* ── Tip Boxes ───────────────────────────────────────────────── */
#manual-screen .manual-tip {
    background: rgba(232,193,112,0.06);
    border-left: 3px solid #e8c170;
    padding: 10px 14px;
    margin: 12px 0;
    font-size: 0.8rem;
    color: #c4a060;
    line-height: 1.6;
}

#manual-screen .manual-tip::before {
    content: '💡 TIP — ';
    font-weight: bold;
    color: #e8c170;
}

/* ── Cross-Reference Links ───────────────────────────────────── */
#manual-screen .manual-xref {
    color: #00FF88;
    text-decoration: none;
    border-bottom: 1px dotted rgba(0,255,136,0.3);
    transition: all 0.2s;
}

#manual-screen .manual-xref:hover {
    color: #33ffaa;
    border-bottom-color: #33ffaa;
}

/* ── Go-To-Page Button ───────────────────────────────────────── */
#manual-screen .manual-goto-btn {
    display: inline-block;
    margin-top: 12px;
    padding: 6px 16px;
    background: transparent;
    border: 1px solid rgba(0,255,136,0.25);
    color: #00FF88;
    font-family: 'Courier New', monospace;
    font-size: 0.72rem;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

#manual-screen .manual-goto-btn:hover {
    background: rgba(0,255,136,0.08);
    border-color: #00FF88;
}

/* ── Resource Icons ──────────────────────────────────────────── */
#manual-screen .manual-resource {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    background: rgba(255,215,0,0.06);
    padding: 1px 6px;
    border-radius: 2px;
    font-size: 0.78rem;
    color: #e8c170;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
    #manual-screen .manual-sidebar {
        width: 220px;
        min-width: 220px;
    }
    #manual-screen .manual-content {
        padding: 0 24px 40px;
    }
}

@media (max-width: 700px) {
    #manual-screen .manual-container {
        flex-direction: column;
    }
    #manual-screen .manual-sidebar {
        position: relative;
        width: 100%;
        min-width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid rgba(0,255,136,0.15);
    }
    #manual-screen .manual-content {
        padding: 0 16px 40px;
    }
}