/* ========================================
   NexJin.ai Custom Styles
   ======================================== */

:root {
    /* Color System */
    --primary-purple: #6366f1;
    --primary-blue: #3b82f6;
    --neutral-white: #ffffff;
    --neutral-lightgray: #f8fafc;
    --neutral-darktext: #1e293b;
    
    /* Gradient */
    --gradient-primary: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-elevated: 0 20px 50px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-size-hero: clamp(3rem, 8vw, 6rem);
    --font-size-h2: clamp(2rem, 5vw, 3rem);
    --font-size-body: 1.125rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ========================================
   Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    color: var(--neutral-darktext);
    background-color: var(--neutral-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-hero);
}

h2 {
    font-size: var(--font-size-h2);
}

p {
    font-size: var(--font-size-body);
    line-height: 1.8;
}

/* ========================================
   Gradient Text Effect
   ======================================== */

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

/* ========================================
   Glassmorphism Effects
   ======================================== */

.glass-card {
    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);
    box-shadow: var(--shadow-elevated);
}

.glass-dark {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========================================
   Button Styles
   ======================================== */

.btn-primary {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    border: 2px solid var(--primary-purple);
    color: var(--primary-purple);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    background: transparent;
}

.btn-secondary:hover {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    transform: translateY(-2px);
}

/* ========================================
   Card Styles
   ======================================== */

.feature-card {
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
    transform-origin: left;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

/* ========================================
   Animations
   ======================================== */

@keyframes blob {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(20px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(50px, 50px) scale(1.05);
    }
}

.animate-blob {
    animation: blob 7s infinite;
}

.animation-delay-2000 {
    animation-delay: 2s;
}

.animation-delay-4000 {
    animation-delay: 4s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* ========================================
   Hover Effects
   ======================================== */

.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
}

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

.hover-scale:hover {
    transform: scale(1.05);
}

/* ========================================
   Section Spacing
   ======================================== */

section {
    position: relative;
}

.section-padding {
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
}

/* ========================================
   Navigation Styles
   ======================================== */

nav {
    transition: all var(--transition-base);
}

nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Scrollbar Styles
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-lightgray);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-purple);
}

/* ========================================
   Selection Styles
   ======================================== */

::selection {
    background: var(--primary-purple);
    color: var(--neutral-white);
}

::-moz-selection {
    background: var(--primary-purple);
    color: var(--neutral-white);
}

/* ========================================
   Focus Styles
   ======================================== */

a:focus,
button:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* ========================================
   Utility Classes
   ======================================== */

.container-custom {
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

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

.bg-gradient {
    background: var(--gradient-primary);
}

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

.shadow-glow-hover:hover {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
}

/* ========================================
   Performance Optimizations
   ======================================== */

.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    nav,
    footer,
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
}