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

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* ===== CSS CUSTOM PROPERTIES (DARK THEME) ===== */
:root {
    /* Colors - Dark Alpine/Mountainous Theme */
    --color-primary: #ffffff;
    /* Was #1a1a1a */
    --color-secondary: #1a1a1a;
    /* Was #ffffff */
    --color-accent: #87CEEB;
    /* Brighter accent for dark mode (Sky Blue) */
    --color-text: #f0f0f0;
    /* Was #1a1a1a (Off-white for readability) */
    --color-text-light: #a9a9a9;
    /* Was #666666 (Light gray) */
    --color-background: #121212;
    /* Was #ffffff (Dark background) */
    --color-background-alt: #1e1e1e;
    /* Was #f8f9fa (Slightly lighter dark) */
    --color-border: #333333;
    /* Was #e0e0e0 (Darker border) */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Typography */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;

    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 12px;
    --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    --box-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== SECTION ANIMATIONS ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.case-studies-grid,
.niche-focus,
.services-table-container {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== LOADING STATE ===== */
.case-studies-grid:empty::before {
    content: 'Loading case studies...';
    display: block;
    text-align: center;
    color: var(--color-text-light);
    font-style: italic;
    padding: var(--spacing-xl);
}

/* ===== ENHANCED INTERACTIONS ===== */
.service-item {
    cursor: pointer;
}

.case-study-card {
    cursor: pointer;
}

/* ===== FOCUS STATES FOR ACCESSIBILITY ===== */
.nav-link:focus,
.cta-button:focus,
.case-study-card:focus,
.service-item:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ===== 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: 0;
}

.section-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== NAVIGATION COMPONENT ===== */
.navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(18, 18, 18, 0.9);
    /* Dark translucent background */
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: var(--spacing-sm);
}

.brand-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

/* ===== HERO COMPONENT ===== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    /* Account for fixed nav */
    background: linear-gradient(135deg, var(--color-background-alt) 0%, var(--color-background) 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-headline {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: var(--font-size-base);
}

.cta-button.primary {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

.cta-button.primary:hover {
    background: var(--color-accent);
    color: var(--color-secondary);
    border-color: var(--color-accent);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--box-shadow-hover);
}

.cta-button.secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.cta-button.secondary:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    transform: translateY(-2px);
}

/* Mountain Visual - Alpine Theme */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.mountain-silhouette {
    width: 100%;
    height: 300px;
    background: linear-gradient(45deg, var(--color-accent) 0%, var(--color-primary) 100%);
    clip-path: polygon(0 100%, 25% 40%, 50% 60%, 75% 20%, 100% 100%);
    opacity: 0.2;
    /* Increased opacity for dark background */
}

/* ===== SERVICES COMPONENT ===== */
.services-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background);
    /* Changed from alt to main */
}

.niche-focus-text {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.niche-intro {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    color: var(--color-text);
    padding: var(--spacing-lg);
    background: var(--color-background-alt);
    /* Changed from main */
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--color-accent);
}

.niche-intro strong {
    color: var(--color-accent);
    font-weight: 600;
}

.services-table-container {
    background: var(--color-background-alt);
    /* Changed from main */
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.services-table {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.service-row {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
    gap: var(--spacing-lg);
}

.service-row:last-child {
    border-bottom: none;
}

.service-row:hover {
    background-color: var(--color-background);
    /* Changed from alt */
}

.service-category {
    width: 150px;
    flex-shrink: 0;
    font-weight: 600;
    color: var(--color-accent);
    font-size: var(--font-size-lg);
    position: relative;
}

.service-category::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: var(--color-border);
}

.service-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.service-item {
    background: var(--color-background);
    /* Changed from alt */
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: calc(var(--border-radius) / 2);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.service-item:hover {
    background: var(--color-accent);
    color: var(--color-secondary);
    /* Changed from background */
    transform: translateY(-1px);
}

/* ===== CASE STUDIES COMPONENT ===== */
.case-studies-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background-alt);
    /* Added background color */
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-lg);
}

.case-study-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    justify-content: space-between;
    aspect-ratio: 3 / 1;
    position: relative;
    overflow: hidden;
}

.case-study-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.case-study-card:hover::before {
    transform: scaleX(1);
}

.case-study-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--color-accent);
}

.case-study-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-study-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    line-height: 1.3;
}

.case-study-description {
    color: var(--color-text-light);
    line-height: 1.5;
    font-size: var(--font-size-sm);
    margin: 0;
}

.case-study-chevron {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-alt);
    border-radius: 50%;
    color: var(--color-accent);
    transition: var(--transition);
    margin-left: var(--spacing-md);
}

.case-study-card:hover .case-study-chevron {
    background: var(--color-accent);
    color: var(--color-secondary);
    /* Changed from background */
    transform: translateX(4px);
}

/* ===== FOOTER COMPONENT ===== */
.footer {
    background: var(--color-background-alt);
    /* Changed from primary */
    color: var(--color-text);
    /* Changed from secondary */
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-brand h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    /* Keep brand title bright */
}

.footer-brand p {
    color: var(--color-text-light);
    /* Changed from accent */
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text);
    /* Changed from secondary */
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    /* Changed from accent */
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--color-text-light);
    /* Changed from accent */
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .niche-intro {
        font-size: var(--font-size-base);
        padding: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        height: 200px;
    }

    .mountain-silhouette {
        height: 150px;
    }

    .case-studies-grid {
        grid-template-columns: 1fr;
    }

    .case-study-card {
        aspect-ratio: 2.5 / 1;
        padding: var(--spacing-md);
    }

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

    .service-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .service-category {
        width: 100%;
    }

    .service-category::after {
        display: none;
    }

    .service-items {
        width: 100%;
    }
}

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

    .hero-cta {
        flex-direction: column;
        align-items: center;
        /* Center buttons in column */
    }

    .cta-button {
        text-align: center;
        width: 100%;
        max-width: 200px;
    }

    .case-study-card {
        aspect-ratio: 2 / 1;
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }

    .case-study-chevron {
        margin-left: 0;
        margin-top: var(--spacing-xs);
    }

    .service-items {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

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