/* ============================================================
   NoCloud AquaHub — User Manual Styles (manual.css)
   ============================================================ */

/* --- Hero --------------------------------------------------- */
.manual-hero {
    padding: 100px 0 40px;
    position: relative;
    overflow: hidden;
}

.manual-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 50% at 30% 80%, rgba(14,165,233,0.06) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 70% 20%, rgba(34,211,238,0.04) 0%, transparent 50%);
    pointer-events: none;
}

.manual-hero .section-header {
    position: relative;
    z-index: 1;
    margin-bottom: 0;
}

.manual-hero .section-title {
    font-size: 2.75rem;
}

.manual-pdf-btn {
    margin-top: 20px;
}


/* --- Table of Contents -------------------------------------- */
.manual-toc {
    padding-top: 20px;
    padding-bottom: 40px;
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.toc-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.toc-item:hover {
    border-color: var(--teal-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}

.toc-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(14,165,233,0.1);
    color: var(--teal-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    flex-shrink: 0;
}

.toc-item:hover .toc-number {
    background: var(--teal-primary);
    color: var(--pearl);
}

.toc-text {
    font-size: 0.875rem;
    font-weight: 600;
}


/* --- Manual Content ----------------------------------------- */
.manual-content {
    padding-bottom: 80px;
}

.manual-section {
    margin-bottom: 64px;
    scroll-margin-top: 80px;
}

.manual-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.manual-section-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teal-primary), var(--aqua-accent));
    color: #fff;
    font-size: 1.125rem;
    font-weight: 700;
    flex-shrink: 0;
}

.manual-section-header h2 {
    font-size: 1.75rem;
}

.manual-section-body h3 {
    font-size: 1.125rem;
    margin: 28px 0 12px;
    color: var(--teal-primary);
}

.manual-section-body p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.manual-section-body > p:last-child {
    margin-bottom: 0;
}


/* --- Screenshots -------------------------------------------- */
.manual-screenshot {
    margin: 20px 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #0a1628;
    max-width: 640px;
}

.manual-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

.manual-screenshot.small {
    max-width: 380px;
}

.manual-screenshot-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 16px 0;
}

.manual-screenshot-row .manual-screenshot {
    flex: 1 1 280px;
    margin: 0;
}

.screenshot-caption {
    display: block;
    text-align: center;
    padding: 8px 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.03);
    border-top: 1px solid var(--border-color);
}


/* --- Steps -------------------------------------------------- */
.manual-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 16px 0;
}

.manual-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.manual-step > div {
    flex: 1;
}

.manual-step .step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(14,165,233,0.1);
    color: var(--teal-primary);
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.manual-step h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.manual-step p {
    font-size: 0.875rem;
    margin-bottom: 0 !important;
}


/* --- Feature List ------------------------------------------- */
.manual-feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 16px 0;
}

.manual-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(14,165,233,0.1);
    color: var(--teal-primary);
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-icon.pink {
    background: rgba(244,63,94,0.1);
    color: #f43f5e;
}

.feature-icon.gold {
    background: rgba(234,179,8,0.1);
    color: #eab308;
}

.feature-icon.cyan {
    background: rgba(14,165,233,0.1);
    color: var(--teal-primary);
}

.manual-feature h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.manual-feature p {
    font-size: 0.875rem;
    margin-bottom: 0 !important;
}

.manual-feature ul {
    margin-top: 8px;
    padding-left: 0;
}

.manual-feature ul li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    padding-left: 16px;
    position: relative;
}

.manual-feature ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--teal-primary);
}


/* --- Lists -------------------------------------------------- */
.manual-list {
    padding-left: 0;
    margin: 12px 0;
}

.manual-list li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
    margin-bottom: 6px;
}

.manual-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--teal-primary);
}


/* --- Note Box ----------------------------------------------- */
.manual-note {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 16px 20px;
    background: rgba(14,165,233,0.06);
    border: 1px solid rgba(14,165,233,0.15);
    border-left: 3px solid var(--teal-primary);
    border-radius: var(--radius-sm);
    margin: 20px 0;
}

.manual-note i {
    color: var(--teal-primary);
    font-size: 1rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.manual-note p {
    font-size: 0.875rem;
    margin-bottom: 0 !important;
    line-height: 1.7;
}

.manual-note.warning {
    background: rgba(234,179,8,0.06);
    border-color: rgba(234,179,8,0.2);
    border-left-color: #eab308;
}

.manual-note.warning i {
    color: #eab308;
}


/* --- Params Grid (Water Quality) ---------------------------- */
.manual-params-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 16px 0;
}

.param-card {
    padding: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
}

.param-card strong {
    display: block;
    font-size: 0.875rem;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.param-card span {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}


/* --- Settings Table ----------------------------------------- */
.manual-settings-table {
    margin: 16px 0;
}

.setting-row {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-name {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-heading);
}

.setting-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}


/* --- Status Icon Table -------------------------------------- */
.manual-icon-table {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 12px 0 20px;
}

.icon-row {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.icon-indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
}

.icon-indicator.red { background: #ef4444; }
.icon-indicator.yellow { background: #eab308; }
.icon-indicator.green { background: #22c55e; }
.icon-indicator.blue { background: #3b82f6; }

.icon-indicator.blink {
    animation: blink-indicator 1.2s ease-in-out infinite;
}

@keyframes blink-indicator {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}


/* --- Troubleshooting FAQ ------------------------------------ */
.manual-faq {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.manual-faq-item {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.manual-faq-item:first-child {
    border-top: 1px solid var(--border-color);
}

.manual-faq-item h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.manual-faq-item p {
    font-size: 0.875rem;
    margin-bottom: 0 !important;
}


/* --- Print / PDF -------------------------------------------- */
@media print {
    .site-header,
    .site-footer,
    .mobile-menu,
    .manual-hero .section-label,
    .manual-pdf-btn,
    .manual-toc {
        display: none !important;
    }

    .manual-hero {
        padding: 20px 0;
    }

    .manual-hero .section-title {
        font-size: 2rem;
        color: #000;
    }

    .manual-hero .section-subtitle {
        color: #333;
    }

    body {
        background: #fff;
        color: #000;
        font-size: 11pt;
    }

    .manual-section {
        page-break-inside: avoid;
        margin-bottom: 32px;
    }

    .manual-screenshot {
        max-width: 500px;
        border: 1px solid #ccc;
    }

    .manual-section-header {
        border-bottom-color: #ccc;
    }

    .manual-section-number {
        background: #0ea5e9;
    }

    .manual-section-header h2,
    .manual-section-body h3,
    .manual-section-body h4 {
        color: #000;
    }

    .manual-section-body p,
    .manual-section-body li,
    .setting-desc,
    .icon-row,
    .manual-faq-item p,
    .manual-note p,
    .param-card span {
        color: #333;
    }

    .manual-note {
        background: #f0f9ff;
        border-color: #bae6fd;
    }

    .manual-note.warning {
        background: #fefce8;
        border-color: #fde68a;
    }

    a { color: #000; text-decoration: none; }
}


/* --- Responsive --------------------------------------------- */
@media (max-width: 1024px) {
    .toc-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .manual-params-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .manual-hero {
        padding: 80px 0 24px;
    }

    .manual-hero .section-title {
        font-size: 2rem;
    }

    .toc-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .toc-item {
        padding: 10px 14px;
    }

    .manual-section-header h2 {
        font-size: 1.375rem;
    }

    .manual-params-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .setting-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}

@media (max-width: 480px) {
    .toc-grid {
        grid-template-columns: 1fr;
    }

    .manual-params-grid {
        grid-template-columns: 1fr 1fr;
    }
}