/* ============================================
   PORTFOLIO DESIGN SYSTEM
   Modern CSS with Custom Properties
   ============================================ */

/* Fonts load via <link> in HTML (Syne, Cormorant, Inter) — no @import */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* DEFAULT THEME (Dark Mode) */
    --color-bg-primary: hsl(230, 20%, 4%);
    --color-bg-secondary: hsl(230, 18%, 7%);
    --color-bg-tertiary: hsl(230, 15%, 10%);

    --color-text-primary: hsl(0, 0%, 100%);
    --color-text-secondary: hsl(230, 10%, 80%);
    --color-text-muted: hsl(230, 10%, 60%);

    --color-btn-text: hsl(230, 20%, 4%); /* Dark text for vibrant buttons in dark mode */

    --glass-bg: rgba(10, 10, 20, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
    --gradient-surface: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
    --gradient-border: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.02));

    /* Neon Accents for Dark Mode */
    --color-primary: hsl(270, 100%, 70%);
    --color-secondary: hsl(200, 100%, 65%);
    --color-accent: hsl(160, 100%, 60%);
    
    /* Missing Accents */
    --color-accent-primary: var(--color-primary);
    --color-accent-secondary: var(--color-secondary);

    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    
    --gradient-mesh: radial-gradient(at 0% 0%, hsla(270, 100%, 70%, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, hsla(200, 100%, 65%, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, hsla(160, 100%, 60%, 0.15) 0px, transparent 50%),
        radial-gradient(at 0% 100%, hsla(270, 100%, 70%, 0.15) 0px, transparent 50%);
}

/* ============================================
   GLOBAL BACKGROUND ANIMATION
   ============================================ */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -10;
    overflow: hidden;
    pointer-events: none;
    background: var(--color-bg-primary);
}

.bg-animation::before,
.bg-shape {
    display: none;
}

[data-theme="light"] {
    --color-bg-primary: hsl(230, 20%, 98%);
    --color-bg-secondary: hsl(230, 18%, 94%);
    --color-bg-tertiary: hsl(230, 15%, 90%);

    --color-text-primary: hsl(230, 20%, 10%);
    --color-text-secondary: hsl(230, 15%, 25%); /* Darker grey */
    --color-text-muted: hsl(230, 10%, 40%); /* Darker muted text */

    --color-btn-text: hsl(0, 0%, 100%); /* White text for vibrant buttons in light mode */

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --gradient-surface: linear-gradient(135deg, rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0.01));
    --gradient-border: linear-gradient(135deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.02));

    /* Darker Accents for better contrast on Light Background */
    --color-primary: hsl(270, 80%, 45%); 
    --color-secondary: hsl(200, 80%, 40%); 
    --color-accent: hsl(160, 80%, 35%);

    --color-accent-primary: var(--color-primary);
    --color-accent-secondary: var(--color-secondary);

    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

:root {
    /* SHARED TOKENS */

    /* Shadows */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 30px hsla(270, 100%, 70%, 0.4);

    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Outfit', 'Space Grotesk', sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 5rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.1;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;

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

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.23, 1, 0.32, 1);
    --transition-base: 350ms cubic-bezier(0.23, 1, 0.32, 1);
    --transition-slow: 600ms cubic-bezier(0.23, 1, 0.32, 1);

    /* Layout */
    --container-max-width: 1300px;
    --section-padding: var(--space-3xl);
}

/* Responsive Typography Adjustments */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-4xl: 2rem;
        --font-size-5xl: 2.5rem;
        --font-size-6xl: 3rem;
        --section-padding: var(--space-xl);
    }
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: clip;
    max-width: 100vw;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--space-md);
}

h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
}

h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
}

h4 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-accent-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-accent-secondary);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

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

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@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);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
    }

    50% {
        box-shadow: 0 0 30px rgba(139, 92, 246, 0.6);
    }
}

/* Animation Classes */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out forwards;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out forwards;
}

.animate-scale-in {
    animation: scaleIn 0.6s ease-out forwards;
}

/* Scroll Animation - Initially Hidden */
.scroll-animate {
    opacity: 0;
}

.scroll-animate.visible {
    opacity: 1;
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-secondary);
}

/* ============================================
   SELECTION STYLING
   ============================================ */
::selection {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
}

::-moz-selection {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
}