/* ========================================
   Apex Accuracy - Construction Tools
   Modern CSS with CSS Variables
   ======================================== */

/* CSS Variables - Design System */
:root {
    /* Colors */
    --color-primary: #1e3a5f;
    --color-primary-dark: #152a45;
    --color-primary-light: #2a4a73;
    --color-secondary: #4a5568;
    --color-accent: #3182ce;
    --color-white: #ffffff;
    --color-gray-50: #f7fafc;
    --color-gray-100: #edf2f7;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e0;
    --color-gray-400: #a0aec0;
    --color-gray-500: #718096;
    --color-gray-600: #4a5568;
    --color-gray-700: #2d3748;
    --color-gray-800: #1a202c;
    --color-gray-900: #171923;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-4) 0;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--color-white);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.logo-img {
    width: 100px;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.logo-icon {
    font-size: var(--font-size-2xl);
    line-height: 1;
}

.logo-text {
    font-weight: 700;
    letter-spacing: -0.025em;
    display: inline !important;
}

/* Pill Navigation */
.pill-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
}

.nav-link {
    display: block;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    color: var(--color-gray-600);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-primary);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--space-24) + 80px) 0 var(--space-24);
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 50%, var(--color-gray-50) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(30, 58, 95, 0.03) 100%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-primary);
    margin-bottom: var(--space-6);
}

.hero-title .line {
    display: block;
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-gray-600);
    margin-bottom: var(--space-8);
    min-height: 1.6em;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Calculator Preview */
.calculator-preview {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-6);
    max-width: 400px;
    margin-left: auto;
}

.calc-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--color-gray-100);
    margin-bottom: var(--space-4);
}

.calc-icon {
    font-size: var(--font-size-2xl);
    display: flex;
    align-items: center;
}

.calc-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
}

.calc-title {
    font-weight: 600;
    color: var(--color-primary);
}

.calc-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) 0;
    color: var(--color-gray-600);
    border-bottom: 1px solid var(--color-gray-100);
}

.calc-value {
    font-weight: 600;
    color: var(--color-gray-800);
}

.calc-total {
    display: flex;
    justify-content: space-between;
    padding-top: var(--space-4);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.calc-total .accent {
    color: var(--color-accent);
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--color-gray-400);
    border-bottom: 2px solid var(--color-gray-400);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(8px); }
}

/* ========================================
   Section Styles
   ======================================== */

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-4);
    color: var(--color-primary);
}

.section-title .line {
    display: block;
}

.section-title .accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto var(--space-12);
}

/* ========================================
   Tools Section
   ======================================== */

.tools-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.tool-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-gray-300);
}

.tool-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
}

.tool-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--color-accent);
}

.tool-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.tool-desc {
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.tool-link {
    font-weight: 600;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.tool-link:hover {
    gap: var(--space-3);
}

/* Glare Hover Effect */
.glare-hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transition: left 0.5s ease;
    pointer-events: none;
}

.glare-hover:hover::before {
    left: 100%;
}

/* ========================================
   Why Choose Us Section
   ======================================== */

.why-section {
    padding: var(--space-24) 0;
    background: var(--color-gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-4);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-white);
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.feature-desc {
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* ========================================
   CTA Banner
   ======================================== */

.cta-banner {
    padding: var(--space-24) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    color: var(--color-white);
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-6);
}

.cta-title .accent {
    -webkit-text-fill-color: rgba(255, 255, 255, 0.9);
    background: none;
}

.cta-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-8);
}

/* ========================================
   Contact Section
   ======================================== */

.contact-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-weight: 600;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group textarea {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.info-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.info-icon {
    font-size: var(--font-size-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.info-icon img {
    width: 32px;
    height: auto;
    object-fit: contain;
}

.info-content h4 {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.info-content a {
    color: var(--color-gray-600);
}

.info-content a:hover {
    color: var(--color-accent);
}

/* ========================================
   Logo Loop Section
   ======================================== */

.logo-section {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
    overflow: hidden;
}

.logo-section-title {
    text-align: center;
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-6);
}

.logo-loop {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.logo-loop::before,
.logo-loop::after {
    content: '';
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.logo-loop::before {
    left: 0;
    background: linear-gradient(to right, var(--color-gray-50), transparent);
}

.logo-loop::after {
    right: 0;
    background: linear-gradient(to left, var(--color-gray-50), transparent);
}

.logo-track {
    display: flex;
    gap: var(--space-12);
    animation: scroll-loop 20s linear infinite;
    width: max-content;
}

.logo-item {
    white-space: nowrap;
    font-weight: 600;
    color: var(--color-gray-400);
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-item svg {
    stroke: var(--color-gray-400);
}

@keyframes scroll-loop {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-primary);
    color: var(--color-white);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.footer-brand .logo-img {
    width: 100px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-links h4 {
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-white);
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

.footer-tagline {
    font-family: monospace;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-visual {
        display: none;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .nav {
        flex-wrap: wrap;
    }
    
    .pill-nav {
        display: none;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}