/* ============================================================================
   STARTUPSIVION DESIGN SYSTEM 2025
   Modern, consistent design foundation
   ============================================================================ */

:root {
    /* Primary - Indigo/Purple (Intelligence, Innovation) */
    --sv-primary-50: #eef2ff;
    --sv-primary-100: #e0e7ff;
    --sv-primary-200: #c7d2fe;
    --sv-primary-300: #a5b4fc;
    --sv-primary-400: #818cf8;
    --sv-primary-500: #6366f1;
    --sv-primary-600: #4f46e5;
    --sv-primary-700: #4338ca;
    --sv-primary-800: #3730a3;
    --sv-primary-900: #312e81;

    /* Accent - Electric Blue (Energy, Technology) */
    --sv-accent-400: #60a5fa;
    --sv-accent-500: #3b82f6;
    --sv-accent-600: #2563eb;

    /* Neutrals - Modern Slate */
    --sv-slate-50: #f8fafc;
    --sv-slate-100: #f1f5f9;
    --sv-slate-200: #e2e8f0;
    --sv-slate-600: #475569;
    --sv-slate-700: #334155;
    --sv-slate-800: #1e293b;
    --sv-slate-900: #0f172a;
    --sv-slate-950: #020617;

    /* Semantic Colors */
    --sv-success: #10b981;
    --sv-warning: #f59e0b;
    --sv-error: #ef4444;

    /* Gradients */
    --sv-gradient-primary: linear-gradient(135deg, #6366f1 0%, #3b82f6 100%);
    --sv-gradient-hero: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    --sv-gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

    /* Typography */
    --sv-font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --sv-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --sv-font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Spacing Scale */
    --sv-space-1: 0.25rem;
    --sv-space-2: 0.5rem;
    --sv-space-3: 0.75rem;
    --sv-space-4: 1rem;
    --sv-space-6: 1.5rem;
    --sv-space-8: 2rem;
    --sv-space-12: 3rem;
    --sv-space-16: 4rem;
    --sv-space-24: 6rem;

    /* Border Radius */
    --sv-radius-sm: 0.375rem;
    --sv-radius-md: 0.5rem;
    --sv-radius-lg: 0.75rem;
    --sv-radius-xl: 1rem;
    --sv-radius-2xl: 1.5rem;
    --sv-radius-full: 9999px;

    /* Shadows */
    --sv-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --sv-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --sv-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --sv-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --sv-shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Transitions */
    --sv-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --sv-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --sv-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   LUCIDE ICONS - SVG Color Inheritance
   ============================================================================ */

/* Ensure Lucide SVG icons properly inherit colors from text-* classes */
[data-lucide] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Style the SVG elements created by Lucide */
[data-lucide] svg,
svg[data-lucide] {
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

/* Fallback size only when no explicit size classes are set */
svg[data-lucide]:not([class*="w-"]):not([class*="h-"]):not([class*="size-"]) {
    width: 1em;
    height: 1em;
}

/* Ensure i elements with data-lucide that haven't been processed yet show as empty */
i[data-lucide]:empty {
    display: inline-block;
    width: 1em;
    height: 1em;
}

/* Override any conflicting styles on SVG elements */
.lucide,
[class*="lucide-"] {
    stroke: currentColor;
    fill: none;
}

/* ============================================================================
   TEXT WRAP UTILITIES - Prevent orphaned words
   ============================================================================ */

/* Balance line lengths in headings to avoid single-word lines */
h1, h2, h3, h4, h5, h6,
.text-balance {
    text-wrap: balance;
}

/* Pretty wrap for paragraphs - prevents orphans at end of text blocks */
p {
    text-wrap: pretty;
}

/* Utility class for balanced text */
.text-pretty {
    text-wrap: pretty;
}

/* ============================================================================
   GLASSMORPHISM UTILITIES
   ============================================================================ */

.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-dark {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--sv-radius-xl);
}

/* ============================================================================
   INTERACTIVE UTILITIES
   ============================================================================ */

.interactive {
    transition: all var(--sv-transition-base);
    cursor: pointer;
}

.interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--sv-shadow-xl);
}

.interactive:active {
    transform: translateY(0);
}

.hover-scale {
    transition: transform var(--sv-transition-base);
}

.hover-scale:hover {
    transform: scale(1.02);
}

.hover-glow {
    transition: box-shadow var(--sv-transition-base);
}

.hover-glow:hover {
    box-shadow: var(--sv-shadow-glow);
}

/* ============================================================================
   BUTTON SYSTEM
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sv-space-2);
    padding: var(--sv-space-3) var(--sv-space-6);
    font-family: var(--sv-font-body);
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: var(--sv-radius-lg);
    transition: all var(--sv-transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--sv-gradient-primary);
    color: white;
    box-shadow: var(--sv-shadow-md);
}

.btn-primary:hover {
    box-shadow: var(--sv-shadow-xl);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--sv-slate-100);
    color: var(--sv-slate-900);
}

.btn-secondary:hover {
    background: var(--sv-slate-200);
}

.btn-ghost {
    background: transparent;
    color: var(--sv-slate-700);
    border: 1px solid var(--sv-slate-200);
}

.btn-ghost:hover {
    background: var(--sv-slate-50);
    border-color: var(--sv-slate-300);
}

.btn-lg {
    padding: var(--sv-space-4) var(--sv-space-8);
    font-size: 1rem;
}

/* ============================================================================
   BENTO GRID SYSTEM
   ============================================================================ */

.bento-grid {
    display: grid;
    gap: var(--sv-space-4);
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.bento-item {
    background: white;
    border-radius: var(--sv-radius-xl);
    padding: var(--sv-space-6);
    border: 1px solid var(--sv-slate-200);
    transition: all var(--sv-transition-base);
}

.bento-item:hover {
    border-color: var(--sv-primary-200);
    box-shadow: var(--sv-shadow-lg);
    transform: translateY(-4px);
}

.bento-item-large {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .bento-item-large {
        grid-column: span 1;
    }
}

/* ============================================================================
   TYPOGRAPHY SYSTEM
   ============================================================================ */

.heading-1 {
    font-family: var(--sv-font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--sv-slate-900);
}

.heading-2 {
    font-family: var(--sv-font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--sv-slate-900);
}

.heading-3 {
    font-family: var(--sv-font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    line-height: 1.3;
    color: var(--sv-slate-900);
}

.body-large {
    font-family: var(--sv-font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--sv-slate-600);
}

.body {
    font-family: var(--sv-font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--sv-slate-600);
}

.body-small {
    font-family: var(--sv-font-body);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--sv-slate-500);
}

.gradient-text {
    background: var(--sv-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.container {
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--sv-space-6);
    padding-right: var(--sv-space-6);
}

.container-narrow {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--sv-space-6);
    padding-right: var(--sv-space-6);
}

.section {
    padding-top: var(--sv-space-16);
    padding-bottom: var(--sv-space-16);
}

@media (max-width: 768px) {
    .section {
        padding-top: var(--sv-space-12);
        padding-bottom: var(--sv-space-12);
    }
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    }

    50% {
        box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    }
}

.animate-fade-in-up {
    animation: fade-in-up 0.6s ease-out;
}

.animate-pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* ============================================================================
   ACCESSIBILITY - Focus States & Motion
   ============================================================================ */

/* Focus-visible styles for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--sv-primary-500);
    outline-offset: 2px;
    border-radius: var(--sv-radius-md);
}

/* High contrast focus for dark backgrounds */
.bg-slate-900 button:focus-visible,
.bg-slate-900 a:focus-visible,
.glass-dark button:focus-visible,
.glass-dark a:focus-visible {
    outline-color: var(--sv-accent-400);
}

/* Remove default outline when using focus-visible */
button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
input:focus:not(:focus-visible) {
    outline: none;
}

/* Reduced motion support for vestibular disorders */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Skip to content link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--sv-primary-600);
    color: white;
    padding: var(--sv-space-2) var(--sv-space-4);
    z-index: 100;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* ============================================================================
   MEGA MENU NAVIGATION SYSTEM
   ============================================================================ */

/* Desktop Mega Menu Container */
.mega-menu-container {
    position: relative;
}

.mega-menu-trigger {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
    padding: 0.5rem 0;
    transition: color var(--sv-transition-base);
}

.mega-menu-trigger:hover {
    color: var(--sv-primary-600);
}

.mega-menu-trigger .chevron-icon {
    transition: transform var(--sv-transition-base);
}

.mega-menu-container:hover .mega-menu-trigger .chevron-icon {
    transform: rotate(180deg);
}

/* Mega Menu Panel */
.mega-menu-panel {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 320px;
    width: max-content;
    max-width: 720px;
    background: white;
    border-radius: var(--sv-radius-xl);
    box-shadow: var(--sv-shadow-xl);
    border: 1px solid var(--sv-slate-200);
    display: none;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--sv-transition-base);
    z-index: 100;
    padding: 1.5rem;
    margin-top: 0.5rem;
    max-height: 70vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.mega-menu-container:hover .mega-menu-panel {
    display: block;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mega-menu-panel[data-open="true"] {
    display: block;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Wide panel for Platform mega menu */
.mega-menu-panel.mega-menu-wide {
    min-width: 500px;
}

/* Extra wide panel for Resources mega menu */
.mega-menu-panel.mega-menu-extra-wide {
    min-width: 600px;
}

/* Mega Menu Grid Layout */
.mega-menu-grid {
    display: grid;
    gap: 1.5rem;
}

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

/* Mega Menu Section */
.mega-menu-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mega-menu-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sv-slate-500);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--sv-slate-100);
}

/* Mega Menu Items */
.mega-menu-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--sv-radius-md);
    transition: all var(--sv-transition-base);
    text-decoration: none;
}

.mega-menu-item:hover {
    background: var(--sv-slate-50);
}

.mega-menu-item-icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: var(--sv-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mega-menu-item-content {
    flex: 1;
    min-width: 0;
}

.mega-menu-item-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--sv-slate-900);
    margin-bottom: 0.125rem;
}

.mega-menu-item-description {
    font-size: 0.75rem;
    color: var(--sv-slate-500);
    line-height: 1.4;
}

/* Mega Menu Footer Link */
.mega-menu-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--sv-slate-100);
}

.mega-menu-footer-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--sv-primary-600);
    text-decoration: none;
    transition: color var(--sv-transition-base);
}

.mega-menu-footer-link:hover {
    color: var(--sv-primary-700);
}

/* Simple Menu Items (for Resources) */
.mega-menu-simple-item {
    display: block;
    padding: 0.375rem 0.5rem;
    font-size: 0.875rem;
    color: var(--sv-slate-700);
    text-decoration: none;
    border-radius: var(--sv-radius-sm);
    transition: all var(--sv-transition-base);
}

.mega-menu-simple-item:hover {
    background: var(--sv-slate-50);
    color: var(--sv-primary-600);
}

/* Mobile Menu - Accordion Styles */
.mobile-nav-accordion {
    display: flex;
    flex-direction: column;
}

.mobile-nav-section {
    border-bottom: 1px solid var(--sv-slate-100);
}

.mobile-nav-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 1rem;
    background: none;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--sv-slate-700);
    cursor: pointer;
    transition: all var(--sv-transition-base);
}

.mobile-nav-trigger:hover {
    background: var(--sv-slate-50);
}

.mobile-nav-trigger .chevron-icon {
    transition: transform var(--sv-transition-base);
}

.mobile-nav-trigger[aria-expanded="true"] .chevron-icon {
    transform: rotate(180deg);
}

.mobile-nav-panel {
    display: none; /* Hidden by default, shown with .active class */
    padding: 0 1rem 1rem;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease-in-out, opacity 0.2s ease-in-out, padding 0.3s ease-in-out;
}

.mobile-nav-panel.active {
    display: block;
    max-height: 1000px; /* Large enough for content */
    opacity: 1;
    padding: 0 1rem 1rem;
}

/* Respect user's motion preferences (WCAG 2.2 / 2025 best practice) */
@media (prefers-reduced-motion: reduce) {
    .mobile-nav-panel {
        transition: opacity 0.1s linear;
        max-height: none;
    }

    .mobile-nav-panel.active {
        opacity: 1;
    }
}

.mobile-nav-section-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sv-slate-400);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.mobile-nav-section-title:first-child {
    margin-top: 0;
}

.mobile-nav-item {
    display: block;
    padding: 0.5rem 0;
    font-size: 0.875rem;
    color: var(--sv-slate-600);
    text-decoration: none;
    transition: color var(--sv-transition-base);
}

.mobile-nav-item:hover {
    color: var(--sv-primary-600);
}

.mobile-nav-link {
    display: block;
    padding: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--sv-slate-700);
    text-decoration: none;
    border-bottom: 1px solid var(--sv-slate-100);
    transition: all var(--sv-transition-base);
}

.mobile-nav-link:hover {
    background: var(--sv-slate-50);
    color: var(--sv-primary-600);
}

/* ============================================================================
   DARK MODE (Future-proofing)
   ============================================================================ */

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark mode overrides will go here */
    }
}

/* ============================================================================
   WCAG 2.2 AA ACCESSIBILITY ENHANCEMENTS
   ============================================================================ */

/* Ensure minimum touch target size (44x44px) for mobile */
@media (pointer: coarse) {
    button,
    a,
    [role="button"],
    input[type="checkbox"],
    input[type="radio"] {
        min-height: 44px;
        min-width: 44px;
    }
}

/* High contrast mode support */
@media (forced-colors: active) {
    .btn-primary,
    .btn-secondary,
    .btn-ghost {
        border: 2px solid currentColor;
    }

    :focus-visible {
        outline: 3px solid currentColor !important;
    }
}

/* Screen reader only utility (for skip links and labels) */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* When sr-only element receives focus, make it visible */
.sr-only:focus,
.sr-only:focus-within {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Ensure interactive elements have visible focus for all input types */
:focus {
    outline: 2px solid var(--sv-primary-500);
    outline-offset: 2px;
}

/* Better focus styles for form elements */
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--sv-primary-500);
    outline-offset: 0;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Ensure disabled elements are visually distinct but not too faded for readability */
button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Ensure links are distinguishable from text (not just by color) */
a:not(.btn):not([class*="hover:"]) {
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:not(.btn):hover {
    text-decoration-thickness: 2px;
}

/* Ensure error states are not indicated by color alone */
.error,
[aria-invalid="true"] {
    border-color: var(--sv-error) !important;
    box-shadow: 0 0 0 1px var(--sv-error);
}

.error::before,
[aria-invalid="true"]::before {
    content: "!";
    color: var(--sv-error);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Ensure sufficient spacing for readability */
p, li {
    line-height: 1.6;
}

/* Scrollbar styling with sufficient contrast */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--sv-slate-100);
}

::-webkit-scrollbar-thumb {
    background: var(--sv-slate-600);
    border-radius: var(--sv-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--sv-slate-700);
}

/* Live region for screen readers */
[aria-live] {
    position: relative;
}

/* Ensure motion is reduced for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .animate-bounce,
    .animate-bounce-slow,
    .animate-pulse,
    .animate-spin,
    .animate-fade-in-up,
    .animate-pulse-glow {
        animation: none !important;
    }

    .hover-scale:hover,
    .interactive:hover {
        transform: none !important;
    }

    .transition-all,
    .transition-colors,
    .transition-transform {
        transition: none !important;
    }
}