/* ================================
   QUBITUMAI - Main Stylesheet
   Quantum-Inspired Design System
   ================================ */

/* === Variables & Custom Properties === */
:root {
    /* Primary Colors - Quantum Purple Spectrum */
    --quantum-purple: #9D00FF;
    --neon-purple: #BD00FF;
    --metallic-purple: #8B00CC;
    --dark-purple: #6B00AA;
    --light-purple: #E6D5FF;
    
    /* Secondary Colors - Quantum Blue Spectrum */
    --quantum-blue: #00D4FF;
    --neon-blue: #00E5FF;
    --deep-blue: #0066FF;
    --dark-blue: #0044CC;
    --light-blue: #B3ECFF;
    
    /* Background Colors */
    --dark-bg: #0A0A0F;
    --darker-bg: #050508;
    --light-bg: #1A1A25;
    --card-bg: rgba(157, 0, 255, 0.1);
    
    /* Text Colors */
    --light-text: #E0E0FF;
    --white: #FFFFFF;
    --gray-text: #B0B0C0;
    --accent-text: #FFDD00;
    
    /* Gradients */
    --quantum-gradient: linear-gradient(135deg, var(--quantum-purple), var(--quantum-blue));
    --neon-gradient: linear-gradient(45deg, var(--neon-purple), var(--neon-blue));
    --metallic-gradient: linear-gradient(180deg, var(--metallic-purple), var(--deep-blue));
    
    /* Shadows & Effects */
    --glow-purple: 0 0 30px rgba(157, 0, 255, 0.5);
    --glow-blue: 0 0 30px rgba(0, 212, 255, 0.5);
    --card-shadow: 0 10px 40px rgba(157, 0, 255, 0.3);
    --hover-shadow: 0 15px 50px rgba(157, 0, 255, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 10px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --radius-full: 50px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index Layers */
    --z-background: -1;
    --z-normal: 1;
    --z-overlay: 100;
    --z-modal: 1000;
    --z-navigation: 2000;
}

/* === Global Reset & Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--dark-bg);
    color: var(--light-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: var(--quantum-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: var(--glow-purple);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--light-text);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

a {
    color: var(--quantum-blue);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--neon-blue);
}

/* === Container & Layout === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-dark {
    background-color: var(--darker-bg);
}

.section-gradient {
    background: linear-gradient(135deg, rgba(157, 0, 255, 0.05) 0%, rgba(0, 212, 255, 0.05) 100%);
}

/* === Navigation Styles === */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: var(--z-navigation);
    transition: all var(--transition-normal);
    box-shadow: 0 2px 20px rgba(157, 0, 255, 0.2);
}

.nav.scrolled {
    padding: var(--spacing-xs) 0;
    box-shadow: 0 5px 30px rgba(157, 0, 255, 0.4);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 2rem;
    font-weight: 900;
    background: var(--neon-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

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

/* === Buttons & Interactive Elements === */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--quantum-gradient);
    color: var(--white);
    box-shadow: var(--card-shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--hover-shadow);
}

.btn-secondary {
    background: transparent;
    color: var(--quantum-purple);
    border: 2px solid var(--quantum-purple);
}

.btn-secondary:hover {
    background: var(--quantum-purple);
    color: var(--white);
}

/* === Cards & Components === */
.card {
    background: var(--card-bg);
    border: 1px solid rgba(157, 0, 255, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    transform: rotate(45deg);
    transition: opacity var(--transition-slow);
    opacity: 0;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--hover-shadow);
    border-color: var(--quantum-blue);
}

.card:hover::before {
    opacity: 1;
}

/* === Forms & Inputs === */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--light-text);
    font-weight: 500;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(157, 0, 255, 0.3);
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--quantum-purple);
    box-shadow: 0 0 20px rgba(157, 0, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

/* === Animations === */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes quantum-glow {
    0% { box-shadow: 0 0 20px rgba(157, 0, 255, 0.5); }
    50% { box-shadow: 0 0 40px rgba(0, 212, 255, 0.8); }
    100% { box-shadow: 0 0 20px rgba(157, 0, 255, 0.5); }
}

/* === Utility Classes === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.py-1 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-3 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

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

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

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

@media (max-width: 768px) {
    html { font-size: 14px; }
    
    .nav-links { display: none; }
    
    .grid-4,
    .grid-3,
    .grid-2 { grid-template-columns: 1fr; }
    
    .container { padding: 0 var(--spacing-sm); }
    
    .section { padding: var(--spacing-lg) 0; }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* === Loading Animation === */
.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--dark-purple);
    border-top-color: var(--quantum-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === Accessibility === */
.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;
}

/* Focus styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--quantum-purple);
    outline-offset: 4px;
}

/* === Print Styles === */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .nav,
    .no-print {
        display: none;
    }
}