/* Premium Technical Case Study Styling - Skill Hub */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-code: 'JetBrains Mono', monospace;
    
    /* Dark Premium Slate Palette */
    --color-bg-dark: #030712;      /* Deepest Slate 950 */
    --color-surface-dark: #0B0F19; /* Rich Dark Slate 900 */
    --color-text-primary: #F9FAFB; /* Gray 50 */
    --color-text-body: #D1D5DB;    /* Gray 300 */
    --color-text-muted: #9CA3AF;   /* Gray 400 */
    --color-border-dark: #1F2937;  /* Slate 800 */
    
    --color-accent-indigo: #6366F1; /* Indigo 500 */
    --color-accent-indigo-light: rgba(99, 102, 241, 0.1);
    
    /* Neon Status Highlights */
    --color-neon-blue: #38BDF8;   /* Sky 400 */
    --color-neon-blue-light: rgba(56, 189, 248, 0.1);
    --color-neon-cyan: #34D399;   /* Emerald 400 */
    --color-neon-cyan-light: rgba(52, 211, 153, 0.1);
    --color-neon-purple: #A78BFA; /* Violet 400 */
    --color-neon-purple-light: rgba(167, 139, 250, 0.1);
    --color-neon-pink: #F43F5E;   /* Rose 500 */
    --color-neon-pink-light: rgba(244, 63, 94, 0.1);
    --color-neon-amber: #F59E0B;  /* Amber 500 */
    --color-neon-amber-light: rgba(245, 158, 11, 0.1);
    --color-neon-green: #10B981;  /* Emerald 500 */
    --color-neon-green-light: rgba(16, 185, 129, 0.1);
    
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --browser-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

body {
    background-color: var(--color-bg-dark);
    color: var(--color-text-body);
    font-family: var(--font-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

.text-muted {
    color: var(--color-text-muted) !important;
}

code:not([class*="language-"]) {
    background-color: rgba(99, 102, 241, 0.1);
    color: #A78BFA;
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    font-family: var(--font-code);
    font-size: 0.85em;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Elegant dark ribbon */
.info-ribbon-dark {
    background-color: #0B0F19;
    border-bottom: 1px solid var(--color-border-dark);
    padding: 0.5rem 0;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.info-ribbon-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.info-ribbon-badge-dark {
    background-color: var(--color-accent-indigo-light);
    color: var(--color-accent-indigo);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Dark Segmented Control View Switcher */
.navbar-dark {
    border-bottom: 1px solid var(--color-border-dark) !important;
    background-color: var(--color-bg-dark) !important;
}

.nav-view-switcher-dark {
    display: inline-flex;
    background-color: #111827;
    padding: 0.25rem;
    border-radius: 8px;
    border: 1px solid var(--color-border-dark);
    margin-left: 1.5rem;
}

.nav-view-switcher-dark .view-btn {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    color: var(--color-text-body);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-view-switcher-dark .view-btn:hover {
    color: var(--color-text-primary);
}

.nav-view-switcher-dark .view-btn.active {
    background-color: var(--color-border-dark);
    color: var(--color-accent-indigo);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.series-nav-panel-dark {
    margin: 3rem auto 0;
    padding: 1.25rem;
    border: 1px solid var(--color-border-dark);
    border-radius: 12px;
    background: rgba(11, 15, 25, 0.88);
    box-shadow: var(--card-shadow);
    text-align: left;
}

.series-nav-kicker-dark {
    margin-bottom: 0.85rem;
    color: var(--color-neon-blue);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
}

.series-nav-grid-dark {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.85rem;
}

.series-nav-card-dark {
    display: block;
    min-height: 124px;
    padding: 1rem;
    border: 1px solid var(--color-border-dark);
    border-radius: 10px;
    color: var(--color-text-body);
    background: #0f172a;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.series-nav-card-dark:hover,
.series-nav-card-dark:focus {
    color: var(--color-text-body);
    border-color: rgba(56, 189, 248, 0.48);
    background: #111827;
    transform: translateY(-2px);
}

.series-nav-card-dark.active {
    border-color: rgba(56, 189, 248, 0.68);
    background: rgba(56, 189, 248, 0.1);
}

.series-nav-card-dark strong {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--color-text-primary);
    font-family: var(--font-heading);
    font-size: 1rem;
}

.series-nav-card-dark span {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.88rem;
    line-height: 1.5;
}

@media (max-width: 991px) {
    .nav-view-switcher-dark {
        margin-left: 0;
        margin-top: 1rem;
        width: 100%;
        justify-content: center;
    }
    .nav-view-switcher-dark .view-btn {
        flex: 1;
        text-align: center;
        padding-right: 0.5rem;
        padding-left: 0.5rem;
    }
    .series-nav-grid-dark {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575px) {
    .nav-view-switcher-dark .view-btn {
        font-size: 0.76rem;
    }
}

/* Hero Section */
.hero-section {
    background: radial-gradient(circle at 20% 20%, #1e1e38 0%, #030712 60%);
    padding: 7rem 0 6rem;
    position: relative;
    border-bottom: 1px solid var(--color-border-dark);
}

.hero-subtitle-pill-dark {
    display: inline-flex;
    padding: 0.35rem 0.85rem;
    background-color: var(--color-accent-indigo-light);
    color: var(--color-accent-indigo);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

.hero-section h1 {
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-section .lead {
    font-size: 1.15rem;
    color: var(--color-text-body);
    max-width: 780px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.8;
}

.hero-badges-wrapper {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-badges-wrapper .badge {
    background-color: #1F2937 !important;
    color: var(--color-text-body) !important;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--color-border-dark);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: var(--font-code);
}

/* Side Rail Navigation (Dark Theme Refinement) */
.side-rail {
    position: fixed;
    top: 15%;
    right: 2rem;
    width: 210px;
    z-index: 1000;
    background-color: rgba(11, 15, 25, 0.95);
    border: 1px solid var(--color-border-dark);
    border-radius: 12px;
    padding: 1.5rem;
    font-size: 0.82rem;
    box-shadow: var(--browser-shadow);
    backdrop-filter: blur(8px);
}

.side-rail-title {
    font-family: var(--font-code);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--color-border-dark);
    padding-bottom: 0.5rem;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
}

.side-rail ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}

.side-rail li {
    margin-bottom: 0.65rem;
}

.side-rail li:last-child {
    margin-bottom: 0;
}

.side-rail a {
    color: var(--color-text-body);
    text-decoration: none;
    transition: all 0.2s ease;
    display: block;
    font-family: var(--font-code);
}

.side-rail a:hover {
    color: var(--color-neon-blue);
    transform: translateX(4px);
}

.side-rail-btn {
    background-color: var(--color-accent-indigo-light) !important;
    color: var(--color-accent-indigo) !important;
    border: 1px solid var(--color-accent-indigo) !important;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    text-align: center;
    font-weight: 600;
    margin-top: 1.25rem;
    display: block;
    text-decoration: none;
    font-family: var(--font-body);
    transition: all 0.25s ease;
    font-size: 0.85rem;
}

.side-rail-btn:hover {
    background-color: var(--color-accent-indigo) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

@media (max-width: 1200px) {
    .side-rail {
        top: 7.25rem;
        right: 0.75rem;
        width: 178px;
        padding: 1rem;
        font-size: 0.74rem;
        z-index: 900;
    }

    .side-rail-title {
        font-size: 0.68rem;
    }

    .side-rail li {
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 992px) {
    .side-rail {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100%;
        border-radius: 0;
        border: none;
        border-top: 1px solid var(--color-border-dark);
        padding: 0.75rem 1rem;
        display: flex;
        justify-content: space-around;
        align-items: center;
        margin-bottom: 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    }
    .side-rail-title, .side-rail ul {
        display: none;
    }
    .side-rail-btn {
        margin-top: 0;
        width: auto;
        flex-grow: 1;
        margin: 0 0.5rem;
    }
    body {
        padding-bottom: 70px;
    }
}

/* Custom dark mockups */
.browser-mockup-dark {
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--browser-shadow);
    margin-bottom: 2rem;
}

.browser-header-dark {
    background-color: #0F172A;
    border-bottom: 1px solid var(--color-border-dark);
    height: 40px;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    position: relative;
}

.browser-window-dots {
    display: flex;
    gap: 6px;
    align-items: center;
}

.browser-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.browser-dot.red { background-color: #FF5F56; }
.browser-dot.yellow { background-color: #FFBD2E; }
.browser-dot.green { background-color: #27C93F; }

.browser-address-bar-dark {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 4px;
    font-size: 0.72rem;
    color: var(--color-text-muted);
    padding: 0.15rem 2rem;
    width: clamp(200px, 30vw, 320px);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--font-code);
}

.browser-body-dark {
    background-color: #080C14;
}

.browser-body-dark img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
}

.browser-body-dark .demo-shot {
    display: block;
    width: 100%;
    min-height: 320px;
    aspect-ratio: 16 / 10;
    background-color: #080C14;
    object-fit: contain;
}

.demo-placeholder {
    min-height: inherit;
    width: 100%;
    padding: clamp(2rem, 5vw, 4rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    text-align: center;
    color: var(--color-text-body);
    background:
        linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(3, 7, 18, 0.98)),
        repeating-linear-gradient(135deg, rgba(56, 189, 248, 0.08) 0 1px, transparent 1px 16px);
    border: 1px dashed rgba(56, 189, 248, 0.34);
}

.demo-placeholder-kicker {
    display: inline-flex;
    width: fit-content;
    padding: 0.22rem 0.65rem;
    border-radius: 999px;
    color: var(--color-neon-blue);
    background-color: var(--color-neon-blue-light);
    border: 1px solid rgba(56, 189, 248, 0.18);
    font-family: var(--font-code);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.demo-placeholder strong {
    color: var(--color-text-primary);
    font-family: var(--font-code);
    font-size: clamp(1rem, 2vw, 1.25rem);
    overflow-wrap: anywhere;
}

.demo-placeholder p {
    max-width: 520px;
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* Code mockup wrapping code blocks */
.code-editor-mockup {
    background-color: #0B0F19;
    border: 1px solid var(--color-border-dark);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
}

.code-editor-header {
    background-color: #0F172A;
    border-bottom: 1px solid var(--color-border-dark);
    height: 38px;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    justify-content: space-between;
}

.code-editor-filename {
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Quick Read Box */
.quick-read-box {
    background-color: var(--color-surface-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 12px;
    padding: 2.5rem;
    margin-bottom: 3.5rem;
    box-shadow: var(--card-shadow);
}

.quick-read-box h4 {
    font-size: 1.25rem;
    font-weight: 700;
}

.quick-read-box ul li {
    font-size: 0.92rem;
    margin-bottom: 0.75rem;
}

.quick-read-box ul li:last-child {
    margin-bottom: 0;
}

/* Feature cards & code boxes */
.feature-card {
    background-color: var(--color-surface-dark) !important;
    border: 1px solid var(--color-border-dark) !important;
    border-radius: 12px !important;
    padding: 2.25rem !important;
    margin-bottom: 2rem;
    box-shadow: var(--card-shadow) !important;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--color-accent-indigo) !important;
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover) !important;
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
}

.code-box {
    background-color: #030712 !important;
    border: 1px solid var(--color-border-dark) !important;
    border-radius: 8px !important;
    padding: 1.25rem !important;
    margin-bottom: 1.5rem !important;
}

/* Alert Boxes & Lessons Learned */
.lesson-box-wrapper {
    margin-bottom: 2rem;
}

.lesson-box-wrapper h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.lesson-box-wrapper p {
    font-size: 0.9rem;
    line-height: 1.7;
}

.governance-handoff-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.governance-handoff-item {
    min-height: 150px;
    padding: 1.1rem;
    border: 1px solid var(--color-border-dark);
    border-radius: 12px;
    background-color: #0f172a;
}

.governance-handoff-item span {
    display: inline-block;
    margin-bottom: 0.65rem;
    color: var(--color-neon-cyan);
    font-family: var(--font-code);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.governance-handoff-item strong {
    display: block;
    color: var(--color-text-body);
    font-size: 0.9rem;
    line-height: 1.65;
}

.governance-bridge-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1.5rem;
    align-items: center;
    padding: 2rem;
    border: 1px solid var(--color-border-dark);
    border-left: 4px solid var(--color-neon-blue);
    border-radius: 0 14px 14px 0;
    background:
        linear-gradient(135deg, rgba(56, 189, 248, 0.12), transparent 38%),
        var(--color-surface-dark);
    box-shadow: var(--card-shadow);
}

.governance-bridge-panel h3 {
    margin-bottom: 0.65rem;
    font-size: 1.35rem;
}

.governance-bridge-panel p {
    margin-bottom: 0;
    color: var(--color-text-body);
    font-size: 0.94rem;
}

.governance-bridge-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Section styling refinements */
section.container {
    margin-top: 0 !important;
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.border-neon-left { border-left: 3px solid var(--color-neon-blue) !important; }
.border-neon-danger-left { border-left: 3px solid var(--color-neon-pink) !important; }
.border-neon-warning-left { border-left: 3px solid var(--color-neon-amber) !important; }
.border-neon-success-left { border-left: 3px solid var(--color-neon-green) !important; }

.text-neon-blue  { color: var(--color-neon-blue) !important; }
.text-neon-cyan  { color: var(--color-neon-cyan) !important; }
.text-neon-purple { color: var(--color-neon-purple) !important; }
.text-neon-amber { color: var(--color-neon-amber) !important; }
.text-neon-green { color: var(--color-neon-green) !important; }
.text-neon-pink  { color: var(--color-neon-pink) !important; }

/* Custom Badge Indicator */
.custom-pill-dark {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-accent-indigo-light);
    border: 1px solid var(--color-border-dark);
    border-radius: 999px;
    font-size: 0.75rem;
    color: var(--color-accent-indigo);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-badge {
    background-color: var(--color-accent-indigo-light) !important;
    color: var(--color-accent-indigo) !important;
    border: 1px solid var(--color-border-dark) !important;
    font-family: var(--font-code);
    font-size: 0.7rem;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

/* Insight Box (Tech Callouts) */
.insight-box {
    background-color: var(--color-accent-indigo-light) !important;
    border-left: 4px solid var(--color-accent-indigo) !important;
    border-radius: 0 8px 8px 0 !important;
    padding: 1.5rem !important;
    margin-top: 1.5rem !important;
}

.insight-box .fw-bold {
    color: var(--color-text-primary) !important;
}

/* Buttons */
.btn-outline-info {
    border-color: var(--color-neon-blue) !important;
    color: var(--color-neon-blue) !important;
}

.btn-outline-info:hover {
    background-color: var(--color-neon-blue) !important;
    color: #030712 !important;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.btn-outline-light {
    border-color: var(--color-border-dark) !important;
    color: var(--color-text-body) !important;
}

.btn-outline-light:hover {
    background-color: var(--color-surface-dark) !important;
    color: var(--color-text-primary) !important;
}

hr {
    border-color: var(--color-border-dark) !important;
    opacity: 1 !important;
}

/* Prism override details */
pre[class*="language-"] {
    background: #030712 !important;
    margin: 0 !important;
    border-radius: 0 !important;
    border: none !important;
    font-size: 0.85rem !important;
}
code[class*="language-"] {
    font-family: var(--font-code) !important;
}
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string {
    background: none !important;
}

/* Table custom overrides for dark mode */
.table {
    --bs-table-bg: transparent !important;
    --bs-table-color: var(--color-text-body) !important;
    color: var(--color-text-body) !important;
    border-color: var(--color-border-dark) !important;
}
.table th, .table td {
    background-color: transparent !important;
    color: inherit !important;
    border-color: var(--color-border-dark) !important;
}
.table thead th {
    color: var(--color-text-primary) !important;
    font-family: var(--font-code);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-bottom: 2px solid var(--color-border-dark) !important;
}

@media (max-width: 991px) {
    .governance-handoff-grid,
    .governance-bridge-panel {
        grid-template-columns: 1fr;
    }

    .governance-bridge-actions {
        justify-content: flex-start;
    }
}

@media (max-width: 575px) {
    .browser-body-dark .demo-shot {
        min-height: 280px;
        aspect-ratio: 4 / 3;
    }
}