/* ==========================================================================
   Agentic AI Security Roadmap - Styles
   Matching the sample.html design specification
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Page backgrounds */
    --color-bg-page-start: #1a1a2e;
    --color-bg-page-end: #16213e;
    --color-bg-grid: #0d1117;
    --color-bg-cell: #161b22;
    
    /* Header gradients */
    --color-header-start: #2d3748;
    --color-header-end: #1a202c;
    
    /* Column header top border colors */
    --color-col-foundations: #3182ce;
    --color-col-aiml: #805ad5;
    --color-col-agentic: #d53f8c;
    
    /* Framework card colors - THREATS (red) */
    --color-threat-bg-start: #742a2a;
    --color-threat-bg-end: #5a1e1e;
    --color-threat-border: #fc8181;
    
    /* Framework card colors - RISK (green) */
    --color-risk-bg-start: #2a4a2a;
    --color-risk-bg-end: #1e3a1e;
    --color-risk-border: #68d391;
    
    /* Framework card colors - IMPLEMENTATION (blue) */
    --color-impl-bg-start: #2a3a5a;
    --color-impl-bg-end: #1e2a4a;
    --color-impl-border: #63b3ed;
    
    /* Framework card colors - STANDARDS (brown/orange) */
    --color-standard-bg-start: #4a3a2a;
    --color-standard-bg-end: #3a2a1a;
    --color-standard-border: #f6ad55;
    
    /* Text colors */
    --color-text-primary: #e0e0e0;
    --color-text-muted: #888;
    --color-text-subtle: #718096;
    --color-text-placeholder: #4a5568;
    --color-text-white: #fff;
    
    /* Tooltip */
    --color-tooltip-bg: #1a1a2e;
    --color-tooltip-border: #4a5568;
    
    /* Placeholder */
    --color-placeholder-bg: #1a202c;
    --color-placeholder-border: #2d3748;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 40px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-xs: 0.7rem;
    --font-size-sm: 0.75rem;
    --font-size-base: 0.8rem;
    --font-size-md: 0.85rem;
    --font-size-lg: 0.95rem;
    --font-size-xl: 1rem;
    --font-size-title: 2.2rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Grid */
    --cell-min-height: 180px;
    --row-header-width: 200px;
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--color-bg-page-start) 0%, var(--color-bg-page-end) 100%);
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.header__title {
    font-size: var(--font-size-title);
    font-weight: 700;
    color: var(--color-text-white);
    margin-bottom: 10px;
}

.header__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
}

.header__nav {
    margin-top: var(--spacing-lg);
}

.nav-link {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-header-start) 0%, var(--color-header-end) 100%);
    border: 1px solid var(--color-col-aiml);
    border-radius: 20px;
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-md);
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link:hover {
    background: linear-gradient(135deg, var(--color-col-aiml) 0%, #6b46c1 100%);
    border-color: var(--color-col-aiml);
    color: var(--color-text-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(128, 90, 213, 0.3);
}

.nav-link:focus {
    outline: 2px solid var(--color-col-aiml);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main {
    max-width: 1400px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Roadmap Grid
   -------------------------------------------------------------------------- */
.roadmap-grid {
    display: grid;
    grid-template-columns: var(--row-header-width) repeat(3, 1fr);
    gap: var(--spacing-xs);
    background: var(--color-bg-grid);
    padding: var(--spacing-xs);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Loading State */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

/* Error State */
.error {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-threat-border);
    font-size: var(--font-size-lg);
    background: rgba(252, 129, 129, 0.1);
    border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   Column Headers
   -------------------------------------------------------------------------- */
.column-header {
    background: linear-gradient(180deg, var(--color-header-start) 0%, var(--color-header-end) 100%);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-xl);
    border-radius: var(--radius-md);
    border-top: 4px solid transparent;
}

.column-header--foundations {
    border-top-color: var(--color-col-foundations);
}

.column-header--ai-ml {
    border-top-color: var(--color-col-aiml);
}

.column-header--agentic {
    border-top-color: var(--color-col-agentic);
}

.column-header__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 5px;
}

.column-header__description {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-text-subtle);
    margin-top: 5px;
}

/* Empty corner cell */
.column-header--empty {
    background: var(--color-bg-grid);
    border-top: none;
}

/* --------------------------------------------------------------------------
   Row Headers
   -------------------------------------------------------------------------- */
.row-header {
    background: linear-gradient(90deg, var(--color-header-start) 0%, var(--color-header-end) 100%);
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-lg);
    border-radius: var(--radius-md);
}

.row-header__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.row-header__description {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--color-text-subtle);
    margin-top: 5px;
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   Grid Cells
   -------------------------------------------------------------------------- */
.grid-cell {
    background: var(--color-bg-cell);
    padding: var(--spacing-md);
    min-height: var(--cell-min-height);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.grid-cell--empty {
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid-cell__placeholder {
    background: var(--color-placeholder-bg);
    border: 2px dashed var(--color-placeholder-border);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-placeholder);
    text-align: center;
    font-style: italic;
}

/* --------------------------------------------------------------------------
   Framework Cards
   -------------------------------------------------------------------------- */
.framework-card {
    position: relative;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    text-decoration: none;
    display: block;
}

.framework-card:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.framework-card:focus {
    outline: 2px solid var(--color-impl-border);
    outline-offset: 2px;
}

/* Card color variants by row type - THREATS */
.framework-card--threats {
    background: linear-gradient(135deg, var(--color-threat-bg-start) 0%, var(--color-threat-bg-end) 100%);
    border-left-color: var(--color-threat-border);
}

/* Card color variants by row type - RISK */
.framework-card--risk {
    background: linear-gradient(135deg, var(--color-risk-bg-start) 0%, var(--color-risk-bg-end) 100%);
    border-left-color: var(--color-risk-border);
}

/* Card color variants by row type - IMPLEMENTATION */
.framework-card--implementation {
    background: linear-gradient(135deg, var(--color-impl-bg-start) 0%, var(--color-impl-bg-end) 100%);
    border-left-color: var(--color-impl-border);
}

/* Card color variants by row type - STANDARDS */
.framework-card--standards {
    background: linear-gradient(135deg, var(--color-standard-bg-start) 0%, var(--color-standard-bg-end) 100%);
    border-left-color: var(--color-standard-border);
}

.framework-card__name {
    font-weight: 600;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.framework-card__org {
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    opacity: 0.7;
}

/* --------------------------------------------------------------------------
   Tooltip
   -------------------------------------------------------------------------- */
.framework-card__tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 0;
    background: var(--color-tooltip-bg);
    border: 1px solid var(--color-tooltip-border);
    padding: 12px;
    border-radius: var(--radius-md);
    width: 280px;
    z-index: 100;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    margin-bottom: 8px;
}

.framework-card:hover .framework-card__tooltip,
.framework-card:focus .framework-card__tooltip {
    display: block;
}

.framework-card__tooltip-title {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--color-text-white);
}

.framework-card__tooltip-org {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.framework-card__tooltip-description {
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: #a0aec0;
    margin-bottom: var(--spacing-sm);
}

.framework-card__tooltip-url {
    font-size: var(--font-size-xs);
    color: var(--color-impl-border);
}

/* --------------------------------------------------------------------------
   Footer & Legend
   -------------------------------------------------------------------------- */
.footer {
    margin-top: 30px;
    text-align: center;
}

.legend {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.legend__title {
    display: none;
}

.legend__item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-md);
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    padding: 0;
}

.legend__item::before {
    content: '';
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend__item--threats::before {
    background: var(--color-threat-border);
}

.legend__item--risk::before {
    background: var(--color-risk-border);
}

.legend__item--implementation::before {
    background: var(--color-impl-border);
}

.legend__item--standards::before {
    background: var(--color-standard-border);
}

.footer__attribution {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
}

.footer__attribution a {
    color: var(--color-impl-border);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer__attribution a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
    .roadmap-grid {
        grid-template-columns: 180px repeat(3, 1fr);
    }
    
    .row-header__description {
        display: none;
    }
}

@media (max-width: 900px) {
    :root {
        --cell-min-height: 150px;
        --row-header-width: 140px;
    }
    
    .roadmap-grid {
        grid-template-columns: var(--row-header-width) repeat(3, 1fr);
    }
    
    .column-header__description {
        display: none;
    }
    
    .framework-card__org {
        display: none;
    }
    
    .legend {
        gap: 15px;
    }
}

@media (max-width: 600px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .header__title {
        font-size: 1.5rem;
    }
    
    .header__subtitle {
        font-size: var(--font-size-md);
    }
    
    .roadmap-grid {
        grid-template-columns: 100px repeat(3, 1fr);
    }
    
    .row-header__title {
        font-size: var(--font-size-sm);
    }
    
    .column-header {
        padding: var(--spacing-sm);
    }
    
    .column-header__title {
        font-size: var(--font-size-sm);
    }
    
    .framework-card {
        padding: var(--spacing-sm);
    }
    
    .framework-card__name {
        font-size: var(--font-size-sm);
    }
    
    .framework-card__tooltip {
        display: none !important;
    }
    
    .legend {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .framework-card__tooltip {
        display: none !important;
    }
}