/* ============================================
   VAYUPAKSHA AEROSPACE - UTILITY LAYER
   Tailwind-Style Utility Classes
   ============================================ */

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

/* Flexbox */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-start {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.flex-end {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.flex-col-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1;
}

.flex-auto {
    flex: auto;
}

.flex-none {
    flex: none;
}

/* Grid */
.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* Responsive Grid */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; top: 0; }

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

/* Padding */
.p-section {
    padding: var(--space-section);
}

.p-card {
    padding: var(--space-card);
}

.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.px-8 { padding-left: var(--space-8); padding-right: var(--space-8); }

.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }

.pt-4 { padding-top: var(--space-4); }
.pt-8 { padding-top: var(--space-8); }
.pb-4 { padding-bottom: var(--space-4); }
.pb-8 { padding-bottom: var(--space-8); }
.pl-4 { padding-left: var(--space-4); }
.pr-4 { padding-right: var(--space-4); }

/* Margin */
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.m-0 { margin: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Gap */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.gap-grid {
    gap: var(--space-grid-gap);
}

/* ============================================
   TEXT UTILITIES
   ============================================ */

/* Font Family */
.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }

/* Font Size */
.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-hero { font-size: var(--text-hero); }

/* Font Weight */
.font-light { font-weight: var(--font-light); }
.font-regular { font-weight: var(--font-regular); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

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

/* Text Colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-subtle { color: var(--text-subtle); }

/* Line Height */
.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); }

/* Letter Spacing */
.tracking-tight { letter-spacing: -0.02em; }
.tracking-normal { letter-spacing: 0; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }

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

/* ============================================
   WIDTH & HEIGHT
   ============================================ */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-fit { width: fit-content; }
.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; }

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

/* ============================================
   EFFECT UTILITIES
   ============================================ */

/* Hover Lift */
.hover-lift {
    transition: transform var(--transition-smooth), 
                box-shadow var(--transition-smooth);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

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

/* Hover Glow */
.hover-glow {
    transition: box-shadow var(--transition-base);
}

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

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }

/* ============================================
   BACKGROUND UTILITIES
   ============================================ */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-elevated { background-color: var(--bg-elevated); }
.bg-subtle { background-color: var(--bg-subtle); }

/* ============================================
   BORDER UTILITIES
   ============================================ */
.border { border: 1px solid var(--border-default); }
.border-subtle { border: 1px solid var(--border-subtle); }
.border-strong { border: 1px solid var(--border-strong); }
.border-none { border: none; }

.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ============================================
   RESPONSIVE VISIBILITY
   ============================================ */
@media (max-width: 768px) {
    .md\:hidden { display: none; }
    .md\:flex-col { flex-direction: column; }
    .md\:text-3xl { font-size: var(--text-3xl); }
    .md\:p-section { padding: var(--space-12); }
}

@media (max-width: 480px) {
    .sm\:hidden { display: none; }
    .sm\:flex-col { flex-direction: column; }
    .sm\:text-2xl { font-size: var(--text-2xl); }
    .sm\:p-section { padding: var(--space-8); }
}

/* Desktop-first utilities */
@media (min-width: 1024px) {
    .lg\:grid-4 { grid-template-columns: repeat(4, 1fr); }
    .lg\:flex-row { flex-direction: row; }
}

/* ============================================
   INTERACTIVE STATES
   ============================================ */

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

.focus-ring:focus {
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Active */
.active\:scale:active {
    transform: scale(0.98);
}

/* Disabled */
.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================
   Z-INDEX UTILITIES
   ============================================ */
.z-base { z-index: var(--z-base); }
.z-dropdown { z-index: var(--z-dropdown); }
.z-sticky { z-index: var(--z-sticky); }
.z-fixed { z-index: var(--z-fixed); }
.z-modal { z-index: var(--z-modal); }
.z-tooltip { z-index: var(--z-tooltip); }

/* ============================================
   TRANSITION UTILITIES
   ============================================ */
.transition-fast { transition: all var(--transition-fast); }
.transition-base { transition: all var(--transition-base); }
.transition-slow { transition: all var(--transition-slow); }
.transition-smooth { transition: all var(--transition-smooth); }

/* ============================================
   MISC UTILITIES
   ============================================ */

/* Object Fit */
.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }

/* List Reset */
.list-reset {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* 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: 0;
}

/* No Select */
.select-none {
    user-select: none;
    -webkit-user-select: none;
}