/* Utilities CSS - Helper Classes */
/* Spacing, Colors, Typography, Animations, Responsive Utilities */

/* ==================== CSS CUSTOM PROPERTIES ==================== */

:root {
    /* Colors */
    --primary: #003366;
    --secondary: #F2F2F2;
    --accent: #FFD700;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    --spacing-4xl: 6rem;      /* 96px */
    
    /* Font Sizes */
    --text-xs: 0.75rem;       /* 12px */
    --text-sm: 0.875rem;      /* 14px */
    --text-base: 1rem;        /* 16px */
    --text-lg: 1.125rem;      /* 18px */
    --text-xl: 1.25rem;       /* 20px */
    --text-2xl: 1.5rem;       /* 24px */
    --text-3xl: 1.875rem;     /* 30px */
    --text-4xl: 2.25rem;      /* 36px */
    --text-5xl: 3rem;         /* 48px */
    --text-6xl: 3.75rem;      /* 60px */
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Border Radius */
    --radius-sm: 0.25rem;     /* 4px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 1rem;        /* 16px */
    --radius-xl: 1.5rem;      /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ==================== SPACING UTILITIES ==================== */

/* Padding */
.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }
.p-3xl { padding: var(--spacing-3xl); }
.p-4xl { padding: var(--spacing-4xl); }

/* Padding X-axis */
.px-0 { padding-left: 0; padding-right: 0; }
.px-xs { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.px-xl { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }
.px-2xl { padding-left: var(--spacing-2xl); padding-right: var(--spacing-2xl); }

/* Padding Y-axis */
.py-0 { padding-top: 0; padding-bottom: 0; }
.py-xs { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-2xl { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }

/* Margin */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }
.m-2xl { margin: var(--spacing-2xl); }
.m-auto { margin: auto; }

/* Margin X-axis */
.mx-0 { margin-left: 0; margin-right: 0; }
.mx-sm { margin-left: var(--spacing-sm); margin-right: var(--spacing-sm); }
.mx-md { margin-left: var(--spacing-md); margin-right: var(--spacing-md); }
.mx-lg { margin-left: var(--spacing-lg); margin-right: var(--spacing-lg); }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Margin Y-axis */
.my-0 { margin-top: 0; margin-bottom: 0; }
.my-sm { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-md { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-lg { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-xl { margin-top: var(--spacing-xl); margin-bottom: var(--spacing-xl); }

/* Margin Top */
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

/* Margin Bottom */
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

/* Gap (for flex/grid) */
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }
.gap-2xl { gap: var(--spacing-2xl); }

/* ==================== COLOR UTILITIES ==================== */

/* Background colors */
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-accent { background-color: var(--accent); }
.bg-white { background-color: white; }
.bg-transparent { background-color: transparent; }

/* Text colors */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent); }
.text-white { color: white; }
.text-gray { color: var(--text-secondary); }
.text-light { color: var(--text-light); }

/* Gradient backgrounds */
.bg-gradient-primary {
    background: linear-gradient(to bottom right, var(--primary), #004080);
}

.bg-gradient-accent {
    background: linear-gradient(to bottom right, var(--accent), #e6c200);
}

.bg-gradient-blue {
    background: linear-gradient(to right, #1e3a8a, #3b82f6);
}

/* ==================== TYPOGRAPHY UTILITIES ==================== */

/* Font families */
.font-serif { font-family: 'Playfair Display', serif; }
.font-sans { font-family: 'Inter', sans-serif; }

/* Font sizes */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }
.text-6xl { font-size: var(--text-6xl); }

/* Font weights */
.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* Line heights */
.leading-none { line-height: var(--leading-none); }
.leading-tight { line-height: var(--leading-tight); }
.leading-snug { line-height: var(--leading-snug); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }
.leading-loose { line-height: var(--leading-loose); }

/* Text alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text transform */
.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

/* Text decoration */
.underline { text-decoration: underline; }
.no-underline { text-decoration: none; }

/* Responsive typography */
.responsive-text {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: var(--leading-relaxed);
}

.responsive-heading {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    line-height: var(--leading-tight);
}

.responsive-subheading {
    font-size: clamp(1.25rem, 3vw, 1.875rem);
    line-height: var(--leading-snug);
}

/* ==================== ANIMATION UTILITIES ==================== */

/* Fade in animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
    animation: fadeIn 0.3s ease-out;
}

/* Slide in animations */
@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

.animate-slideInLeft {
    animation: slideInLeft 0.4s ease-out;
}

.animate-slideInRight {
    animation: slideInRight 0.4s ease-out;
}

/* Pulse animation */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Bounce animation */
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-bounce {
    animation: bounce 1s infinite;
}

/* Spin animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* Scale on hover */
.hover-scale:hover {
    transform: scale(1.05);
    transition: transform var(--transition-base);
}

/* Lift on hover */
.hover-lift:hover {
    transform: translateY(-4px);
    transition: transform var(--transition-base);
}

/* ==================== BORDER UTILITIES ==================== */

/* Border radius */
.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Border width */
.border-0 { border-width: 0; }
.border { border-width: 1px; }
.border-2 { border-width: 2px; }
.border-4 { border-width: 4px; }

/* Border colors */
.border-primary { border-color: var(--primary); }
.border-accent { border-color: var(--accent); }
.border-gray { border-color: #e5e7eb; }

/* ==================== SHADOW UTILITIES ==================== */

.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ==================== DISPLAY UTILITIES ==================== */

.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }

/* ==================== FLEXBOX UTILITIES ==================== */

.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }

/* ==================== POSITION UTILITIES ==================== */

.static { position: static; }
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* ==================== WIDTH & HEIGHT UTILITIES ==================== */

.w-full { width: 100%; }
.w-auto { width: auto; }
.w-screen { width: 100vw; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.h-screen { height: 100vh; }

.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-7xl { max-width: 80rem; }

/* ==================== OPACITY UTILITIES ==================== */

.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* ==================== Z-INDEX UTILITIES ==================== */

.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* ==================== CURSOR UTILITIES ==================== */

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }

/* ==================== OVERFLOW UTILITIES ==================== */

.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }

/* ==================== RESPONSIVE UTILITIES ==================== */

/* Mobile utilities */
@media screen and (max-width: 640px) {
    .mobile-hidden { display: none !important; }
    .mobile-block { display: block !important; }
    .mobile-flex { display: flex !important; }
    .mobile-full { width: 100% !important; }
    .mobile-stack { flex-direction: column !important; }
    .mobile-center { text-align: center !important; }
    .mobile-p-sm { padding: var(--spacing-sm) !important; }
    .mobile-p-md { padding: var(--spacing-md) !important; }
}

/* Tablet utilities */
@media screen and (min-width: 641px) and (max-width: 1024px) {
    .tablet-hidden { display: none !important; }
    .tablet-block { display: block !important; }
    .tablet-flex { display: flex !important; }
}

/* Desktop utilities */
@media screen and (min-width: 1025px) {
    .desktop-only { display: block !important; }
    .desktop-hidden { display: none !important; }
}

/* ==================== ACCESSIBILITY UTILITIES ==================== */

/* Screen reader only */
.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;
}

/* Focus visible */
.focus-visible:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Skip link */
.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 999;
}

.skip-link:focus {
    position: absolute;
    left: 6px;
    top: 7px;
    z-index: 999999;
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 3px;
}

/* ==================== PRINT UTILITIES ==================== */

@media print {
    .print-hidden {
        display: none !important;
    }
    
    .print-only {
        display: block !important;
    }
}

/* ==================== HIGH CONTRAST SUPPORT ==================== */

@media (prefers-contrast: high) {
    .btn,
    .card {
        border: 2px solid currentColor;
    }
}

/* ==================== REDUCED MOTION SUPPORT ==================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== DARK MODE SUPPORT ==================== */

@media (prefers-color-scheme: dark) {
    .dark-mode-text {
        color: #f9fafb;
    }
    
    .dark-mode-bg {
        background-color: #1f2937;
    }
}