/* ========================================
   Harjun Raskaskone v4.0 - Base Styles
   Reset, Typography, Layout Foundations
   ======================================== */

/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

/* Add subtle noise texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: var(--noise-opacity);
    z-index: -1;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
    letter-spacing: var(--letter-spacing-tight);
}

h1 {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tighter);
}

h2 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-semibold);
}

h3 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
}

h4 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
}

h5 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
}

h6 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    max-width: 65ch;
}

/* Links */
a {
    color: var(--color-accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

a:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Lists */
ul, ol {
    list-style: none;
}

/* Images */
img, picture, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Buttons */
button {
    font-family: inherit;
    cursor: pointer;
}

button:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Form Elements */
input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* Container System */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

@media (max-width: 768px) {
    .container {
        padding-left: var(--spacing-4);
        padding-right: var(--spacing-4);
    }
}

/* Section Layout */
.section {
    padding: var(--section-spacing) 0;
    position: relative;
}

.section-gray {
    background-color: var(--color-bg-tertiary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-eyebrow {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wider);
    text-transform: uppercase;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-3);
}

.section-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    margin-bottom: var(--spacing-4);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Dividers - Premium gradient dividers */
.divider {
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-border-primary) 20%, 
        var(--color-border-primary) 80%, 
        transparent 100%
    );
    margin: var(--spacing-16) 0;
}

.divider-accent {
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-accent-primary) 50%, 
        transparent 100%
    );
    margin: var(--spacing-16) 0;
    opacity: 0.2;
}

/* Gradient Mesh Background */
.gradient-mesh {
    position: relative;
}

.gradient-mesh::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    z-index: -1;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border-secondary);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--gradient-accent);
    color: white;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-tight);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.logo-text {
    font-size: var(--font-size-lg);
    letter-spacing: var(--letter-spacing-tight);
}

@media (max-width: 640px) {
    .logo-text {
        display: none;
    }
}

/* Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--spacing-2);
    z-index: 10;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

nav ul {
    display: flex;
    gap: var(--spacing-8);
    align-items: center;
}

.nav-link {
    position: relative;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    padding: var(--spacing-2) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent-primary);
}

.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link-cta {
    background: var(--gradient-accent);
    color: white;
    padding: var(--spacing-2) var(--spacing-5);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    nav ul {
        position: fixed;
        top: var(--header-height);
        right: 0;
        width: 280px;
        height: calc(100vh - var(--header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-6);
        box-shadow: var(--shadow-xl);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        border-left: 1px solid var(--color-border-secondary);
    }
    
    nav ul.active {
        transform: translateX(0);
    }
    
    nav ul li {
        width: 100%;
        border-bottom: 1px solid var(--color-border-secondary);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-4) 0;
    }
    
    .nav-link-cta {
        margin-top: var(--spacing-4);
        display: block;
        text-align: center;
    }
}

/* Footer */
.footer {
    background-color: var(--color-steel-900);
    color: var(--color-steel-300);
    padding: var(--spacing-12) 0 var(--spacing-8);
}

.footer-content {
    text-align: center;
}

.footer p {
    color: var(--color-steel-400);
    margin: 0;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-8);
    right: var(--spacing-8);
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: var(--spacing-4);
        right: var(--spacing-4);
        width: 44px;
        height: 44px;
    }
}

/* ============= Hero Section ============= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

/* Gradient Mesh adds light beam/vignette effect */
.hero.gradient-mesh::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.hero > .container {
    position: relative;
    z-index: 1;
}

/* Responsive refinements for mobile */
@media (max-width: 968px) {
    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--spacing-12)) 0 var(--spacing-12);
    }
}