:root {
    --bg-color: #121212;
    --sidebar-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #9e9e9e;
    --accent-color: #c8622a;
    --hover-bg: #2c2c2c;
    --border-color: #333333;
    --font-sans: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
}

.sidebar h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    padding-left: 1rem;
    color: var(--text-color);
    letter-spacing: 1px;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    color: var(--text-muted);
    border: none;
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background-color: var(--hover-bg);
    color: #ffffff;
}

.nav-btn.active {
    background-color: var(--hover-bg);
    color: #ffffff;
    font-weight: 600;
}

.cargo-clarity-btn {
    font-family: 'Barlow', 'Arial Narrow', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.mario-party-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 0.6rem;
    line-height: 1.8;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.mario-party-btn svg {
    width: 1rem;
    height: 1rem;
    color: #f7c948;
    flex-shrink: 0;
}

/* Audit Ready — Cormorant Garamond serif italic, indigo */
.auditready-btn {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.2rem;
    font-weight: 600;
    font-style: italic;
    letter-spacing: var(--tracking-wide, 0.025em);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.auditready-btn svg {
    width: 1rem;
    height: 1rem;
    color: oklch(58.5% .233 277.117);
    flex-shrink: 0;
}

#auditready h1 {
    font-family: 'Cormorant Garamond', serif;
    font-size: var(--text-4xl, 2.25rem);
    font-weight: 700;
    font-style: italic;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: oklch(58.5% .233 277.117);
    border-bottom: 1px solid oklch(86.9% .022 252.894);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

#auditready h1 svg {
    width: 2.2rem;
    height: 2.2rem;
    color: oklch(58.5% .233 277.117);
    flex-shrink: 0;
    font-style: normal;
}

#auditready p {
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.625;
    color: oklch(70.4% .04 256.788);
    max-width: 700px;
    border-left: 2px solid oklch(93% .034 272.788);
    padding-left: 1rem;
    margin-bottom: 1.25rem;
}

.auditready-start-btn {
    display: inline-block;
    margin-top: 2rem;
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.1rem;
    font-weight: 600;
    font-style: italic;
    letter-spacing: 0.05em;
    text-decoration: none;
    color: oklch(51.1% .262 276.966);
    background-color: transparent;
    border: 2px solid oklch(58.5% .233 277.117);
    padding: 0.6rem 2rem;
    border-radius: 0.25rem;
    transition: all 0.15s cubic-bezier(.4, 0, .2, 1);
}

.auditready-start-btn:hover {
    background-color: oklch(96.2% .018 272.314);
    color: oklch(51.1% .262 276.966);
    border-color: oklch(51.1% .262 276.966);
}

/* Main Content Area Styling */
.content-area {
    flex: 1;
    padding: 3rem 4rem;
    overflow-y: auto;
}

.content-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.content-section.active {
    display: block;
}

/* Cargo Clarity — clean, professional, industrial */
#cargoclarity h1 {
    font-family: 'Barlow', 'Arial Narrow', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: #ffffff;
    border-bottom: 2px solid #4a9edd;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

#cargoclarity h1 svg {
    width: 2.4rem;
    height: 2.4rem;
    color: #4a9edd;
    flex-shrink: 0;
}

.cargo-clarity-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.cargo-clarity-btn svg {
    width: 1rem;
    height: 1rem;
    color: #4a9edd;
    flex-shrink: 0;
}

#cargoclarity p {
    font-family: 'Barlow', sans-serif;
    font-size: 1.05rem;
    font-weight: 300;
    letter-spacing: 0.5px;
    line-height: 1.9;
    color: #b0b0b0;
    max-width: 700px;
    border-left: 3px solid #4a9edd;
    padding-left: 1rem;
}

/* SABS 2026 — green, clean, authoritative */
.sabs-btn {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.sabs-btn svg {
    width: 1rem;
    height: 1rem;
    color: #4caf7d;
    flex-shrink: 0;
}

#sabs h1 {
    font-family: var(--font-sans);
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: #4caf7d;
    border-bottom: 2px solid #4caf7d;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

#sabs h1 svg {
    width: 2.4rem;
    height: 2.4rem;
    color: #4caf7d;
    flex-shrink: 0;
}

#sabs p {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 400;
    line-height: 1.9;
    color: #b0b0b0;
    max-width: 700px;
    border-left: 3px solid #4caf7d;
    padding-left: 1rem;
    margin-bottom: 1.25rem;
}

.sabs-start-btn {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-decoration: none;
    background-color: transparent;
    color: #4caf7d;
    border: 2px solid #4caf7d;
    padding: 0.65rem 2rem;
    border-radius: 2px;
    transition: all 0.2s ease;
    outline: none;
}

.sabs-start-btn:hover {
    background-color: transparent;
    color: #3a9e6d;
    border-color: #3a9e6d;
    box-shadow: 0 0 0 3px rgba(76, 175, 125, 0.2);
}

/* Mario Party — retro game, fun, colorful */
#mario-party h1 {
    font-family: 'Press Start 2P', cursive;
    font-size: 1.4rem;
    line-height: 1.6;
    color: #f7c948;
    text-shadow: 3px 3px 0px #c0392b, 6px 6px 0px #000;
    margin-bottom: 1.8rem;
}

#mario-party p {
    font-family: 'Nunito', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #e0e0e0;
    max-width: 700px;
    background-color: #1a1a2e;
    border-left: 4px solid #f7c948;
    padding: 1rem 1.25rem;
    border-radius: 4px;
}

/* Shared button base */
.start-btn {
    display: inline-block;
    margin-top: 2rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

/* Cargo Clarity — sharp, professional */
.cargo-start-btn {
    font-family: 'Barlow', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    background-color: transparent;
    color: #4a9edd;
    border: 2px solid #4a9edd;
    padding: 0.65rem 2rem;
    border-radius: 2px;
}

.cargo-start-btn:hover {
    background-color: #4a9edd;
    color: #121212;
}

/* Mario Party — retro game button */
.mario-start-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 0.65rem;
    background-color: #f7c948;
    color: #121212;
    padding: 0.85rem 1.75rem;
    border-radius: 4px;
    box-shadow: 4px 4px 0px #c0392b, 8px 8px 0px #000;
}

.mario-start-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px #c0392b, 4px 4px 0px #000;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 1rem;
    }

    .sidebar nav {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .content-area {
        padding: 2rem;
    }
}