/* ========================================
   Starting Line Digital - Custom Styles
   Design System: Industrial-Refined + Kinetic Energy
   ======================================== */

/* ========================================
   CSS Variables & Theme
   ======================================== */

:root {
    /* Colors - Monochrome with Electric Accent */
    --color-primary: #0066FF;
    --color-accent: #00F0FF;
    --color-text-primary: #0A0A0A;
    --color-text-secondary: #505050;
    --color-text-muted: #808080;
    --color-bg-primary: #FAFAFA;
    --color-bg-secondary: #F0F0F0;
    --color-bg-tertiary: #E5E5E5;
    --color-border: #D0D0D0;
    --color-grid: rgba(10, 10, 10, 0.04);

    /* Typography */
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Monaco', 'Courier New', monospace;

    /* Spacing */
    --space-unit: 1rem;
    --space-xs: calc(var(--space-unit) * 0.5);
    --space-sm: calc(var(--space-unit) * 1);
    --space-md: calc(var(--space-unit) * 2);
    --space-lg: calc(var(--space-unit) * 4);
    --space-xl: calc(var(--space-unit) * 6);

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #3388FF;
        --color-accent: #00F0FF;
        --color-text-primary: #F5F5F5;
        --color-text-secondary: #B0B0B0;
        --color-text-muted: #808080;
        --color-bg-primary: #0A0A0A;
        --color-bg-secondary: #151515;
        --color-bg-tertiary: #202020;
        --color-border: #303030;
        --color-grid: rgba(255, 255, 255, 0.04);
    }
}

/* ========================================
   Base Overrides
   ======================================== */

body {
    font-family: var(--font-display);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.mono-accent {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--color-primary);
    font-size: 0.875em;
    letter-spacing: 0.05em;
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-bg-primary);
    padding: var(--space-xl) 0 var(--space-lg);
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(var(--color-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-label .divider {
    color: var(--color-text-muted);
}

.hero h1 {
    font-size: clamp(3rem, 10vw, 6.5rem);
    margin: 0 0 var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: 0;
}

.title-main {
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    font-weight: 400;
    font-size: 0.5em;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin: var(--space-md) 0;
    font-style: italic;
}

.hero-description {
    max-width: 700px;
    margin: var(--space-lg) auto 0;
}

.hero-description p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Diagonal Cut */
.diagonal-cut {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 120px;
    background: var(--color-bg-secondary);
    clip-path: polygon(0 60%, 100% 0, 100% 100%, 0 100%);
    z-index: 1;
}

.diagonal-cut-top {
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 120px;
    background: var(--color-bg-primary);
    clip-path: polygon(0 0, 100% 40%, 100% 0);
    z-index: 1;
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
    margin-bottom: var(--space-lg);
}

.section-number {
    display: block;
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

.section-header h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin: 0;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    max-width: 700px;
}

/* ========================================
   What We Do Section
   ======================================== */

.section-what {
    padding: var(--space-xl) 0;
    background: var(--color-bg-secondary);
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
    align-items: start;
}

.content-primary {
    font-size: 1.125rem;
}

.lead-text {
    font-size: 1.375rem;
    font-weight: 600;
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.content-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-primary);
    border-left: 3px solid var(--color-primary);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-xs);
}

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

.section-why {
    position: relative;
    padding: calc(var(--space-xl) + 80px) 0 var(--space-xl);
    background: var(--color-bg-primary);
}

.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.value-card {
    padding: var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    position: relative;
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.card-number {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 3rem;
    opacity: 0.1;
    font-weight: 700;
    line-height: 1;
}

.value-card h3 {
    font-size: 1.5rem;
    margin: 0 0 var(--space-sm);
    font-weight: 700;
}

.value-card p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.card-highlight {
    margin-top: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    color: white;
    display: inline-block;
    font-size: 0.875rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================
   Who We Serve Section
   ======================================== */

.section-serve {
    padding: var(--space-xl) 0;
    background: var(--color-bg-secondary);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.audience-card {
    padding: var(--space-lg);
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    position: relative;
    transition: var(--transition);
}

.audience-card:hover {
    border-color: var(--color-primary);
}

.audience-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.audience-card h3 {
    font-size: 1.75rem;
    margin: 0 0 var(--space-sm);
}

.audience-benefits {
    margin-top: var(--space-md);
    padding-left: 0;
    list-style: none;
}

.audience-benefits li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
    color: var(--color-text-secondary);
}

.audience-benefits li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

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

.section-contact {
    position: relative;
    padding: calc(var(--space-xl) + 80px) 0 var(--space-xl);
    background: var(--color-bg-primary);
    text-align: center;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-message {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin: var(--space-md) 0 var(--space-lg);
}

.contact-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    border: 2px solid var(--color-primary);
    transition: var(--transition);
}

.contact-button:hover {
    background: transparent;
    color: var(--color-primary);
    transform: translateX(4px);
}

.contact-button svg {
    width: 20px;
    height: 20px;
}

.coming-soon {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

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

footer {
    padding: var(--space-lg) 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.footer-tagline {
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

@media (max-width: 768px) {
    .hero {
        min-height: 80vh;
        padding: var(--space-lg) 0;
    }

    .hero h1 {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .content-stats {
        flex-direction: row;
        justify-content: space-around;
    }

    .value-props {
        grid-template-columns: 1fr;
    }

    .audience-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .diagonal-cut,
    .diagonal-cut-top {
        height: 60px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero-description p,
    .content-primary,
    .lead-text {
        font-size: 1rem;
    }
}

/* ========================================
   Accessibility Enhancements
   ======================================== */

/* Focus Visible States */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-border: currentColor;
    }

    .value-card,
    .audience-card {
        border-width: 2px;
    }
}