/* ===================================
   BORAX LABS - TIMELESS DESIGN
   Inspired by Apple's minimalism
   Using Human Psychology Principles
   =================================== */

/* === CSS RESET === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* === ROOT VARIABLES - COLOR PSYCHOLOGY === */
:root {
    /* Color Psychology */
    --trust-blue: #007AFF;        /* Apple blue - Trust & reliability */
    --success-green: #34C759;     /* Success & positive actions */
    --alert-red: #FF3B30;         /* Urgency & important notices */
    --neutral-gray: #8E8E93;      /* Secondary text */
    
    /* Grays - Timeless & Clean */
    --black: #1d1d1f;             /* Apple's near-black */
    --dark-gray: #424245;
    --medium-gray: #86868b;
    --light-gray: #f5f5f7;
    --white: #ffffff;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing - Consistent & Harmonious */
    --space-xs: 0.5rem;     /* 8px */
    --space-sm: 1rem;       /* 16px */
    --space-md: 1.5rem;     /* 24px */
    --space-lg: 2rem;       /* 32px */
    --space-xl: 3rem;       /* 48px */
    --space-2xl: 4rem;      /* 64px */
    --space-3xl: 6rem;      /* 96px */
    
    /* Transitions - Smooth & Natural */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Borders */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 18px;
}

/* === BASE STYLES === */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 80px; /* Account for sticky navbar */
}

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

/* Smooth page transitions */
body > * {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* === TYPOGRAPHY - VISUAL HIERARCHY === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--black);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);      /* 40-64px - Responsive */
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);        /* 32-48px */
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);      /* 24-32px */
}

p {
    font-size: 1.125rem;                       /* 18px */
    line-height: 1.7;
    color: var(--dark-gray);
    margin-bottom: var(--space-md);
}

.text-large {
    font-size: 1.25rem;                        /* 20px */
    line-height: 1.6;
}

.text-small {
    font-size: 0.9375rem;                      /* 15px */
    color: var(--medium-gray);
}

/* === CONTAINER & LAYOUT === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

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

.section-compact {
    padding: var(--space-2xl) 0;
}

/* === NAVIGATION - CLEAR & MINIMAL === */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: var(--space-sm) 0;
    transition: all var(--transition-medium);
}

.navbar:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    margin: 0;
    font-weight: var(--font-weight-semibold);
}

.nav-brand a {
    text-decoration: none;
    color: var(--black);
    transition: opacity var(--transition-fast);
}

.nav-brand a:hover {
    opacity: 0.7;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-regular);
    transition: color var(--transition-fast);
    cursor: pointer;
}

.nav-link:hover {
    color: var(--trust-blue);
}

/* === HERO SECTION - FIRST IMPRESSION (0.05s rule) === */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
    position: relative;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--black) 0%, var(--dark-gray) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--medium-gray);
    margin-bottom: var(--space-xl);
    font-weight: var(--font-weight-regular);
}

.hero-note {
    font-size: 1.125rem;
    color: var(--neutral-gray);
    margin-bottom: var(--space-xl);
}

/* === BUTTONS - FITTS'S LAW (Large & Accessible) === */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
    cursor: pointer;
    border: none;
    font-family: inherit;
    min-height: 48px;           /* Minimum touch target */
    min-width: 44px;
}

.btn-primary {
    background: var(--trust-blue);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: #0056d6;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 122, 255, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 5px 15px rgba(0, 122, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--trust-blue);
    border: 2px solid var(--trust-blue);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--trust-blue);
    transition: width 0.4s, height 0.4s, top 0.4s, left 0.4s;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.btn-secondary:hover::before {
    width: 300%;
    height: 300%;
}

.btn-secondary:hover {
    color: var(--white);
    transform: translateY(-2px);
    border-color: var(--trust-blue);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* === CARDS - CLEAN & MINIMAL === */
.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-medium);
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--border-radius-lg);
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.02) 100%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    pointer-events: none;
}

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

/* === GRID LAYOUTS - RESPONSIVE === */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* === SECTION BACKGROUNDS === */
.bg-light {
    background: var(--light-gray);
}

.bg-white {
    background: var(--white);
}

.bg-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.bg-gradient h2,
.bg-gradient h3,
.bg-gradient p {
    color: var(--white);
}

/* === TRUST SIGNALS - BADGES === */
.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 122, 255, 0.1);
    color: var(--trust-blue);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border: 1px solid rgba(0, 122, 255, 0.2);
}

.trust-badge:hover {
    background: rgba(0, 122, 255, 0.15);
    border-color: rgba(0, 122, 255, 0.3);
    transform: translateY(-2px);
}

.badge-success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success-green);
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.badge-success:hover {
    background: rgba(52, 199, 89, 0.15);
    border-color: rgba(52, 199, 89, 0.3);
}

/* === SOCIAL LINKS === */
.social-links {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    justify-content: center;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--light-gray);
    color: var(--dark-gray);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: 1.25rem;
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--trust-blue);
    transition: width 0.3s, height 0.3s, top 0.3s, left 0.3s;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.social-link:hover::before {
    width: 100%;
    height: 100%;
}

.social-link:hover {
    color: var(--white);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}

/* === FOOTER === */
.footer {
    background: var(--black);
    color: var(--light-gray);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer a {
    color: var(--light-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--white);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-section h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
    font-size: 0.875rem;
    color: var(--medium-gray);
}

/* === UTILITIES === */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

/* Fade in on scroll utility */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for grid children */
.stagger-animation > * {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.stagger-animation > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-animation > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-animation > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-animation > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-animation > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-animation > *:nth-child(6) { animation-delay: 0.6s; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* === MOBILE FIRST - RESPONSIVE DESIGN === */
@media (max-width: 768px) {
    :root {
        --space-3xl: 3rem;  /* Reduce large spacing on mobile */
    }
    
    .nav-menu {
        gap: var(--space-md);
        font-size: 0.875rem;
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--space-xl) 0;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9375rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .nav-menu {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

/* === LOADING PERFORMANCE - <3 SECONDS === */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lazy loading hint */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* === ACCESSIBILITY === */
:focus-visible {
    outline: 2px solid var(--trust-blue);
    outline-offset: 2px;
}

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

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 15px 50px rgba(102, 126, 234, 0.4);
    }
}

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

@keyframes wave {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(20deg);
    }
    75% {
        transform: rotate(-20deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

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

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

/* === CODE BLOCKS === */
code {
    background: var(--light-gray);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--trust-blue);
}

pre {
    background: var(--black);
    color: var(--light-gray);
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--space-md) 0;
}

pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}