/* ==========================================================================
   Base Design System & Variables for Toiab Zahoor Portfolio
   ========================================================================== */

:root {
    --bg-primary: #080a10;
    --bg-secondary: #0d111c;
    --bg-card: #121827;
    --bg-card-hover: #172033;
    --bg-glass: rgba(18, 24, 39, 0.7);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-cyan: #38bdf8;
    --accent-cyan-glow: rgba(56, 189, 248, 0.25);
    --accent-indigo: #818cf8;
    --accent-purple: #c084fc;
    --accent-emerald: #34d399;
    --accent-amber: #fbbf24;
    --accent-rose: #f43f5e;
    
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-accent: rgba(56, 189, 248, 0.3);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --font-heading: 'Plus Jakarta Sans', var(--font-sans);
}

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

html {
    color-scheme: dark;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: #080a10;
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* Positioning & Layout Utilities */
.fixed { position: fixed; }
.absolute { position: absolute; }
.relative { position: relative; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.-top-20 { top: -5rem; }
.-right-20 { right: -5rem; }
.-bottom-20 { bottom: -5rem; }
.-left-20 { left: -5rem; }

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

.w-full { width: 100%; }
.h-full { height: 100%; }
.w-2 { width: 0.5rem; }
.h-2 { height: 0.5rem; }
.w-3 { width: 0.75rem; }
.h-3 { height: 0.75rem; }
.w-4 { width: 1rem; }
.h-4 { height: 1rem; }
.w-5 { width: 1.25rem; }
.h-5 { height: 1.25rem; }
.w-6 { width: 1.5rem; }
.h-6 { height: 1.5rem; }
.w-8 { width: 2rem; }
.h-8 { height: 2rem; }
.w-10 { width: 2.5rem; }
.h-10 { height: 2.5rem; }
.h-20 { height: 5rem; }
.w-80 { width: 20rem; }
.h-80 { height: 20rem; }

.min-h-\[92vh\] { min-height: 92vh; }
.min-h-\[300px\] { min-height: 300px; }
.max-h-\[90vh\] { max-height: 90vh; }
.max-h-\[420px\] { max-height: 420px; }

.overflow-hidden { overflow: hidden; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }

.opacity-0 { opacity: 0; }
.opacity-100 { opacity: 1; }
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

.transform { transform: translateZ(0); }
.scale-95 { transform: scale(0.95); }
.scale-100 { transform: scale(1); }

.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.duration-300 { transition-duration: 300ms; }

.blur-3xl { filter: blur(64px); }
.select-none { user-select: none; }


/* Utility Layouts */
.max-w-7xl { max-width: 80rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-2xl { max-width: 42rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }

.pt-20 { padding-top: 5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-16 { margin-bottom: 4rem; }

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-10 { gap: 2.5rem; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

@media (min-width: 640px) {
    .sm\:text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
    .sm\:text-5xl { font-size: 3rem; line-height: 1; }
    .sm\:text-6xl { font-size: 3.75rem; line-height: 1; }
    .sm\:p-6 { padding: 1.5rem; }
    .sm\:p-8 { padding: 2rem; }
    .sm\:p-12 { padding: 3rem; }
    .sm\:inline { display: inline; }
}

@media (min-width: 768px) {
    .md\:flex { display: flex; }
    .md\:flex-row { flex-direction: row; }
    .md\:items-end { align-items: flex-end; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:col-span-2 { grid-column: span 2 / span 2; }
    .md\:border-t-0 { border-top-width: 0; }
    .md\:border-l { border-left-width: 1px; }
    .md\:pt-0 { padding-top: 0; }
    .md\:pl-8 { padding-left: 2rem; }
    .md\:text-7xl { font-size: 4.5rem; line-height: 1; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Typography styles */
.font-mono { font-family: var(--font-mono); }
.font-sans { font-family: var(--font-sans); }
.font-light { font-weight: 300; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }

.text-white { color: #ffffff; }
.text-slate-200 { color: #e2e8f0; }
.text-slate-300 { color: #cbd5e1; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-cyan-300 { color: #7dd3fc; }
.text-cyan-400 { color: var(--accent-cyan); }
.text-indigo-300 { color: #a5b4fc; }
.text-indigo-400 { color: var(--accent-indigo); }
.text-purple-300 { color: #d8b4fe; }
.text-purple-400 { color: var(--accent-purple); }
.text-emerald-300 { color: #6ee7b7; }
.text-emerald-400 { color: var(--accent-emerald); }
.text-amber-400 { color: var(--accent-amber); }

.tracking-tight { letter-spacing: -0.025em; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.uppercase { text-transform: uppercase; }
.text-center { text-align: center; }

/* Gradient text */
.bg-gradient-to-r {
    background-image: linear-gradient(to right, var(--tw-gradient-stops, #38bdf8, #818cf8, #c084fc));
}
.bg-clip-text {
    -webkit-background-clip: text;
    background-clip: text;
}
.text-transparent {
    color: transparent;
}

/* Background canvas */
#bg-canvas {
    opacity: 0.6;
    background: radial-gradient(circle at 50% 20%, rgba(30, 58, 138, 0.15) 0%, rgba(8, 10, 16, 1) 75%);
}

/* Links and buttons transitions */
a {
    color: inherit;
    text-decoration: none;
}