/**
 * MindFlow AI - Refined Design System
 * Sophisticated, minimal, and coherent
 */

/* ==========================================================================
   FONTS & TYPOGRAPHY
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

/* ==========================================================================
   COLOR SYSTEM - Sophisticated Dark Theme
   ========================================================================== */

:root {
    /* Base Colors */
    --color-bg-primary: rgb(4, 6, 12);
    --color-bg-secondary: rgb(10, 12, 20);
    --color-bg-tertiary: rgb(15, 18, 28);

    /* Text Colors */
    --color-text-primary: rgba(255, 255, 255, 0.92);
    --color-text-secondary: rgba(255, 255, 255, 0.64);
    --color-text-tertiary: rgba(255, 255, 255, 0.40);

    /* Accent Colors - Derived from logo */
    --color-accent-cyan: rgba(134, 239, 172, 0.8);
    --color-accent-purple: rgba(196, 181, 253, 0.8);
    --color-accent-pink: rgba(251, 207, 232, 0.8);
    --color-accent-orange: rgba(253, 186, 116, 0.8);

    /* Border Colors */
    --color-border-primary: rgba(255, 255, 255, 0.08);
    --color-border-secondary: rgba(255, 255, 255, 0.04);
    --color-border-accent: rgba(196, 181, 253, 0.2);

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-backdrop: blur(20px);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;

    /* Transitions */
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   BASE STYLES
   ========================================================================== */

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

body {
    font-family: var(--font-body);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ==========================================================================
   SOPHISTICATED BORDER SYSTEM - Broken Lines
   ========================================================================== */

.border-refined {
    position: relative;
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
}

.border-refined::before,
.border-refined::after {
    content: '';
    position: absolute;
    background: var(--color-bg-primary);
}

/* Top-right discontinuity */
.border-refined::before {
    top: -1px;
    right: 20%;
    width: 30px;
    height: 2px;
}

/* Bottom-left discontinuity */
.border-refined::after {
    bottom: -1px;
    left: 25%;
    width: 40px;
    height: 2px;
}

.border-refined-accent {
    border-color: var(--color-border-accent);
}

/* ==========================================================================
   GLASSMORPHISM - Subtle & Refined
   ========================================================================== */

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

.glass-panel-strong {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}

/* ==========================================================================
   3D TRANSFORM SYSTEM
   ========================================================================== */

.transform-3d {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.transform-3d-child {
    transform: translateZ(20px);
    transition: var(--transition-slow);
}

.hover-3d:hover {
    transform: translateY(-8px) rotateX(2deg);
    transition: var(--transition-slow);
}

/* ==========================================================================
   REFINED ANIMATIONS
   ========================================================================== */

@keyframes float-slow {
    0%, 100% {
        transform: translateY(0) translateZ(0);
    }
    50% {
        transform: translateY(-20px) translateZ(10px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(196, 181, 253, 0.2);
    }
    50% {
        box-shadow: 0 0 40px rgba(196, 181, 253, 0.4);
    }
}

@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.animate-float-slow {
    animation: float-slow 8s ease-in-out infinite;
}

.animate-pulse-glow {
    animation: pulse-glow 4s ease-in-out infinite;
}

/* ==========================================================================
   BUTTONS - Refined
   ========================================================================== */

.btn-refined {
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-refined::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(196, 181, 253, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-refined:hover::before {
    width: 300px;
    height: 300px;
}

.btn-refined:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-2px);
}

.btn-refined-primary {
    background: linear-gradient(135deg, rgba(196, 181, 253, 0.1), rgba(134, 239, 172, 0.1));
    border-color: var(--color-border-accent);
}

/* ==========================================================================
   CARDS - Minimal & Consistent
   ========================================================================== */

.card-refined {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition-slow);
    position: relative;
}

.card-refined:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-4px) translateZ(10px);
}

/* Discontinuity effect on hover */
.card-refined::before {
    content: '';
    position: absolute;
    top: -1px;
    right: 15%;
    width: 40px;
    height: 2px;
    background: var(--color-bg-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* ==========================================================================
   TYPOGRAPHY SYSTEM
   ========================================================================== */

.text-display {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.text-heading {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.text-subheading {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.4;
}

.text-body {
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.text-small {
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text-tertiary);
}

/* ==========================================================================
   GRADIENT TEXT
   ========================================================================== */

.text-gradient {
    background: linear-gradient(135deg,
        var(--color-accent-purple) 0%,
        var(--color-accent-cyan) 50%,
        var(--color-accent-pink) 100%
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 8s ease infinite;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section-spacing {
    padding: var(--spacing-3xl) 0;
}

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

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

@media (max-width: 1024px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   REFINED SCROLL ANIMATIONS
   ========================================================================== */

.reveal-fade {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* ==========================================================================
   BACKGROUND EFFECTS
   ========================================================================== */

.bg-grid-pattern {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.bg-gradient-subtle {
    position: fixed;
    inset: 0;
    background: radial-gradient(
        circle at 20% 50%,
        rgba(196, 181, 253, 0.03) 0%,
        transparent 50%
    ),
    radial-gradient(
        circle at 80% 80%,
        rgba(134, 239, 172, 0.03) 0%,
        transparent 50%
    );
    pointer-events: none;
    z-index: 0;
}