/* ================================================================
   NODE VEIL — Design System
   Version: 1.0.0
   ================================================================ */

/* ----------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ---------------------------------------------------------------- */
:root {
    --nv-bg-primary: #ffffff;
    --nv-bg-secondary: #f4f7fa;
    --nv-bg-tertiary: #eaeff5;
    --nv-surface: rgba(8, 145, 178, 0.03);
    --nv-surface-hover: rgba(8, 145, 178, 0.06);
    --nv-border: rgba(15, 23, 42, 0.08);
    --nv-border-hover: rgba(8, 145, 178, 0.25);
    --nv-accent: #0891b2;
    --nv-accent-rgb: 8, 145, 178;
    --nv-accent-glow: 0 4px 14px rgba(8, 145, 178, 0.25);
    --nv-accent-hover: #0e7490;
    --nv-secondary: #6d28d9;
    --nv-secondary-rgb: 109, 40, 217;
    --nv-text-primary: #0f172a;
    --nv-text-secondary: #334155;
    --nv-text-muted: #64748b;
    --nv-font-heading: 'Outfit', sans-serif;
    --nv-font-body: 'Inter', sans-serif;
    --nv-text-xs: 0.75rem;
    --nv-text-sm: 0.875rem;
    --nv-text-base: 1rem;
    --nv-text-lg: 1.125rem;
    --nv-text-xl: 1.25rem;
    --nv-text-2xl: 1.5rem;
    --nv-text-3xl: clamp(1.75rem, 2.5vw, 2rem);
    --nv-text-4xl: clamp(2rem, 3vw, 2.5rem);
    --nv-text-5xl: clamp(2.5rem, 4vw, 3.5rem);
    --nv-text-hero: clamp(2.75rem, 5vw, 4.5rem);
    --nv-space-xs: 0.25rem;
    --nv-space-sm: 0.5rem;
    --nv-space-md: 1rem;
    --nv-space-lg: 1.5rem;
    --nv-space-xl: 2rem;
    --nv-space-2xl: 3rem;
    --nv-space-3xl: 4rem;
    --nv-space-4xl: 6rem;
    --nv-space-section: clamp(4rem, 8vw, 7rem);
    --nv-container-max: 1200px;
    --nv-container-narrow: 800px;
    --nv-container-pad: clamp(1rem, 3vw, 2rem);
    --nv-glass-bg: rgba(255, 255, 255, 0.7);
    --nv-glass-blur: blur(20px);
    --nv-glass-border: 1px solid rgba(15, 23, 42, 0.06);
    --nv-radius-sm: 6px;
    --nv-radius-md: 10px;
    --nv-radius-lg: 16px;
    --nv-radius-xl: 24px;
    --nv-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --nv-transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --nv-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.1);
    --nv-shadow-md: 0 4px 6px rgba(15, 23, 42, 0.05), 0 10px 15px rgba(15, 23, 42, 0.1);
    --nv-shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.08), 0 20px 48px rgba(15, 23, 42, 0.12);
    --nv-shadow-accent: 0 4px 14px rgba(8, 145, 178, 0.2);
    --nv-success: #22c55e;
    --nv-warning: #f59e0b;
    --nv-error: #ef4444;
}

/* 2. Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--nv-font-body);
    font-size: var(--nv-text-base);
    line-height: 1.7;
    color: var(--nv-text-primary);
    background-color: var(--nv-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding-top: 72px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--nv-font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--nv-text-primary);
    margin: 0 0 var(--nv-space-md);
}

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

h2 {
    font-size: var(--nv-text-5xl);
}

h3 {
    font-size: var(--nv-text-3xl);
}

h4 {
    font-size: var(--nv-text-2xl);
}

p {
    margin: 0 0 var(--nv-space-md);
    color: var(--nv-text-secondary);
}

/* 3. Layout */
.nv-container {
    width: 100%;
    max-width: var(--nv-container-max);
    margin-inline: auto;
    padding-inline: var(--nv-container-pad);
}

.nv-container--narrow {
    max-width: var(--nv-container-narrow);
}

.nv-section {
    padding-block: var(--nv-space-section);
    position: relative;
}

.nv-grid {
    display: grid;
    gap: var(--nv-space-xl);
}

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

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

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

@media (max-width: 991px) {

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

@media (max-width: 767px) {

    .nv-grid--2,
    .nv-grid--3,
    .nv-grid--4 {
        grid-template-columns: 1fr;
    }
}

/* 4. Glassmorphism */
.glass-panel {
    background: var(--nv-glass-bg);
    backdrop-filter: var(--nv-glass-blur);
    -webkit-backdrop-filter: var(--nv-glass-blur);
    border: var(--nv-glass-border);
    border-radius: var(--nv-radius-lg);
    box-shadow: var(--nv-shadow-sm);
}

.glass-panel--subtle {
    background: var(--nv-surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-md);
}

.glass-panel--hover {
    transition: box-shadow var(--nv-transition), border-color var(--nv-transition), transform var(--nv-transition);
}

.glass-panel--hover:hover {
    border-color: var(--nv-border-hover);
    box-shadow: var(--nv-shadow-md);
    transform: translateY(-3px);
}

/* 5. Buttons */
.nv-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--nv-space-sm);
    font-family: var(--nv-font-heading);
    font-weight: 600;
    font-size: var(--nv-text-sm);
    letter-spacing: 0.02em;
    border: none;
    border-radius: var(--nv-radius-sm);
    padding: 0.75rem 1.75rem;
    cursor: pointer;
    transition: all var(--nv-transition);
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
}

.nv-btn-primary {
    background: var(--nv-accent);
    color: #ffffff;
    box-shadow: var(--nv-accent-glow);
}

.nv-btn-primary:hover {
    background: var(--nv-accent-hover);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(var(--nv-accent-rgb), 0.35);
    transform: translateY(-2px);
}

.nv-btn-secondary {
    background: transparent;
    color: var(--nv-text-primary);
    border: 1px solid var(--nv-border);
}

.nv-btn-secondary:hover {
    border-color: var(--nv-accent);
    color: var(--nv-accent);
    background: rgba(var(--nv-accent-rgb), 0.05);
}

.nv-btn--lg {
    font-size: var(--nv-text-base);
    padding: 1rem 2.25rem;
    border-radius: var(--nv-radius-md);
}

/* 6. Section Headings */
.nv-section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--nv-space-sm);
    font-family: var(--nv-font-heading);
    font-size: var(--nv-text-xs);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--nv-accent);
    margin-bottom: var(--nv-space-md);
    padding: var(--nv-space-xs) var(--nv-space-md);
    background: rgba(var(--nv-accent-rgb), 0.06);
    border: 1px solid rgba(var(--nv-accent-rgb), 0.12);
    border-radius: 100px;
}

.nv-section-title {
    font-size: var(--nv-text-5xl);
    margin-bottom: var(--nv-space-md);
}

.nv-section-subtitle {
    font-size: var(--nv-text-lg);
    color: var(--nv-text-secondary);
    max-width: 600px;
}

.nv-section-header {
    text-align: center;
    margin-bottom: var(--nv-space-3xl);
}

.nv-section-header .nv-section-subtitle {
    margin-inline: auto;
}

/* 7. Background Patterns */
.nv-bg-grid {
    position: relative;
}

.nv-bg-grid::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.nv-bg-grid>* {
    position: relative;
    z-index: 1;
}

.nv-glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--nv-accent-rgb), 0.08) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}

/* 8. Utility: Gradient Accent Text */
.accent {
    background: linear-gradient(135deg, var(--nv-accent) 0%, var(--nv-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}