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

:root {
    /* Typography */
    --font-primary: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-display: Georgia, 'Times New Roman', serif;

    /* Spacing Scale */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 48px;
    --space-xl: 80px;
    --space-2xl: 120px;

    /* Layout */
    --sidebar-width: 300px;
    --sidebar-collapsed-width: 64px;

    /* Default Colors (overridden by theme) */
    --sidebar-bg: #0a0a0a;
    --sidebar-text: #ffffff;
    --sidebar-text-muted: rgba(255, 255, 255, 0.6);
    --sidebar-hover: rgba(255, 255, 255, 0.05);
    --sidebar-active: rgba(255, 255, 255, 0.08);
    --sidebar-border: rgba(255, 255, 255, 0.1);

    --content-bg: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #6b6b6b;
    --accent-color: #B87333;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    height: 100%;
}

body {
    display: flex;
    font-family: var(--font-primary);
    background-color: var(--content-bg);
    color: var(--text-color);
    line-height: 1.6;
    letter-spacing: 0.01em;
}

/* ========================================
   SIDEBAR
   ======================================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: width var(--transition-base);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: var(--space-md) var(--space-sm) var(--space-md) var(--space-md);
    border-bottom: 1px solid var(--sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 8px;
}

.sidebar-header .logo {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--sidebar-text);
    line-height: 1.4;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.logo-text {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.logo-icon {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(184, 115, 51, 0.15);
    border-radius: 4px;
}

.sidebar.collapsed .logo-text {
    opacity: 0;
    transform: translateX(-10px);
    position: absolute;
    pointer-events: none;
}

/* Collapse button */
.sidebar-collapse-btn {
    background: none;
    border: none;
    color: var(--sidebar-text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast), transform var(--transition-base);
    flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
    color: var(--sidebar-text);
}

.sidebar.collapsed .sidebar-collapse-btn {
    transform: rotate(180deg);
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-md) var(--space-sm);
}

.sidebar.collapsed .sidebar-collapse-btn {
    display: none;
}

/* Mobile toggle (hamburger) */
.sidebar-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 14px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
}

.sidebar-toggle span {
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--sidebar-text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav-menu {
    list-style: none;
    padding: var(--space-md) 0;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    color: var(--sidebar-text-muted);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transition: color var(--transition-fast), background-color var(--transition-fast);
    border-left: 2px solid transparent;
    gap: 12px;
    overflow: hidden;
}

/* Nav icons */
.nav-icon {
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.nav-link:hover .nav-icon,
.nav-link.active .nav-icon {
    opacity: 1;
}

.nav-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity var(--transition-fast);
}

.nav-check {
    display: none;
    width: 14px;
    height: 14px;
    margin-left: 6px;
    flex-shrink: 0;
}

.nav-check.visible {
    display: block;
}

.nav-check::before {
    content: '';
    display: block;
    width: 14px;
    height: 14px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2322c55e' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

.nav-link:hover {
    color: var(--sidebar-text);
    background-color: var(--sidebar-hover);
}

.nav-link.active {
    color: var(--sidebar-text);
    background-color: var(--sidebar-active);
    border-left-color: var(--accent-color);
}

/* Parent nav items (groups) */
.nav-parent {
    position: relative;
}

.nav-parent::after {
    content: '';
    width: 6px;
    height: 6px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg);
    transition: transform var(--transition-fast);
    margin-left: var(--space-sm);
}

.nav-group.open > .nav-parent::after {
    transform: rotate(-135deg);
}

/* Submenu */
.nav-submenu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    background-color: rgba(0, 0, 0, 0.15);
}

.nav-group.open > .nav-submenu {
    max-height: 500px;
}

.nav-submenu .nav-link {
    padding-left: calc(var(--space-md) + 12px);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    border-left: none;
}

.nav-submenu .nav-icon {
    width: 16px;
    height: 16px;
}

.nav-submenu .nav-link.active {
    background-color: var(--sidebar-active);
}

/* ========================================
   COLLAPSED SIDEBAR STATE
   ======================================== */
.sidebar.collapsed .nav-menu {
    padding: var(--space-sm) 0;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: var(--space-sm);
}

.sidebar.collapsed .nav-text,
.sidebar.collapsed .nav-badge,
.sidebar.collapsed .nav-check,
.sidebar.collapsed .nav-parent::after {
    display: none;
}

.sidebar.collapsed .nav-submenu {
    position: absolute;
    left: var(--sidebar-collapsed-width);
    top: 0;
    width: 220px;
    max-height: none;
    background-color: var(--sidebar-bg);
    border-left: 1px solid var(--sidebar-border);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.sidebar.collapsed .nav-group:hover > .nav-submenu {
    opacity: 1;
    visibility: visible;
}

.sidebar.collapsed .nav-submenu .nav-link {
    justify-content: flex-start;
    padding: var(--space-sm) var(--space-md);
}

.sidebar.collapsed .nav-submenu .nav-text,
.sidebar.collapsed .nav-submenu .nav-badge,
.sidebar.collapsed .nav-submenu .nav-check.visible {
    display: block;
}

.sidebar.collapsed .nav-group {
    position: relative;
}

/* Tooltip for collapsed state */
.sidebar.collapsed .nav-parent {
    position: relative;
}

.sidebar.collapsed .nav-parent::before {
    content: attr(data-title);
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 6px 12px;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    white-space: nowrap;
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    pointer-events: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 100;
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--sidebar-border);
    margin-top: auto;
}

.btn-clear-data {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    background: rgba(180, 60, 60, 0.1);
    border: 1px solid rgba(180, 60, 60, 0.25);
    border-radius: 4px;
    color: #E57373;
    font-family: var(--font-primary);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-clear-data:hover {
    background: rgba(180, 60, 60, 0.2);
    border-color: rgba(180, 60, 60, 0.4);
    color: #EF5350;
}

.btn-clear-data .nav-icon {
    flex-shrink: 0;
}

.btn-clear-data .btn-label {
    white-space: nowrap;
}

/* Collapsed sidebar footer */
.sidebar.collapsed .sidebar-footer {
    padding: var(--space-sm);
}

.sidebar.collapsed .btn-clear-data {
    justify-content: center;
    padding: 10px;
}

.sidebar.collapsed .btn-clear-data .btn-label {
    display: none;
}

/* Expand button (shown when collapsed) */
.sidebar-expand-btn {
    display: none;
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    background: none;
    border: 1px solid var(--sidebar-border);
    color: var(--sidebar-text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: 4px;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-expand-btn:hover {
    color: var(--sidebar-text);
    border-color: var(--sidebar-text-muted);
}

.sidebar.collapsed .sidebar-expand-btn {
    display: flex;
}

.sidebar.collapsed .sidebar-expand-btn svg {
    transform: rotate(180deg);
}

/* Badges */
.nav-badge {
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    border-radius: 2px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--sidebar-text-muted);
    margin-left: var(--space-xs);
    flex-shrink: 0;
}

.nav-badge.badge-success {
    background-color: rgba(76, 175, 80, 0.2);
    color: #81C784;
}

.nav-badge.badge-working {
    background-color: rgba(184, 115, 51, 0.25);
    color: var(--accent-color);
    animation: pulse 1.5s ease-in-out infinite;
}

.nav-badge.badge-warning {
    background-color: rgba(255, 193, 7, 0.2);
    color: #FFD54F;
}

.nav-badge.badge-error {
    background-color: rgba(244, 67, 54, 0.2);
    color: #E57373;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
}

body.sidebar-collapsed .content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Analysis ID Banner */
.analysis-id-banner {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, rgba(184, 115, 51, 0.1) 0%, rgba(184, 115, 51, 0.05) 100%);
    border-bottom: 1px solid rgba(184, 115, 51, 0.2);
    font-size: 0.8125rem;
}

.analysis-id-label {
    color: var(--text-muted);
    font-weight: 500;
}

.analysis-id-value {
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    color: var(--copper, #B87333);
    background: rgba(184, 115, 51, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
}

.section {
    display: none;
    padding: var(--space-xl) var(--space-xl);
    min-height: 100vh;
    animation: fadeIn var(--transition-slow) ease;
}

.section.active {
    display: block;
}

/* Typography */
.section h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-color);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--accent-color);
}

.section h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--text-color);
    margin-bottom: var(--space-md);
}

.section p {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 680px;
    margin-bottom: var(--space-md);
}

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

/* Lead text */
.lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-color);
}

/* ========================================
   BUTTONS (Genesis-inspired)
   ======================================== */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-primary);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--text-color);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--text-color);
}

.btn-outline:hover {
    background-color: var(--text-color);
    color: var(--content-bg);
}

.btn-text {
    background: none;
    color: var(--text-color);
    padding-left: 0;
    padding-right: 0;
    border-bottom: 1px solid var(--accent-color);
}

.btn-text:hover {
    color: var(--accent-color);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ========================================
   MOBILE RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--space-md);
    }

    .sidebar-toggle {
        display: flex;
    }

    .content {
        margin-left: 0;
    }

    .section {
        padding: var(--space-lg) var(--space-md);
    }

    .section h1 {
        font-size: 1.75rem;
    }

    .mobile-menu-btn {
        display: flex;
        position: fixed;
        top: var(--space-md);
        left: var(--space-md);
        z-index: 999;
        flex-direction: column;
        justify-content: space-between;
        width: 28px;
        height: 14px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0;
    }

    .mobile-menu-btn span {
        display: block;
        width: 100%;
        height: 1px;
        background-color: var(--text-color);
        transition: background-color var(--transition-fast);
    }

    .mobile-menu-btn.hidden {
        display: none;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.text-center { text-align: center; }
.text-uppercase { text-transform: uppercase; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-color); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }