/* ============================================
   CSS Variables - Easy theming customization
   ============================================ */
:root {
    /* Colors */
    --color-primary-dark: #0a0e27;
    --color-secondary-dark: #1a1d2e;
    --color-accent-start: #667eea;
    --color-accent-end: #764ba2;
    --color-text-primary: #ffffff;
    --color-text-secondary: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-border: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;

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

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-primary-dark);
    color: var(--color-text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3 {
    color: var(--color-text-primary);
    font-weight: 700;
    line-height: 1.2;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
    transition: width var(--transition-medium);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) 1.5rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    max-width: 900px;
    z-index: 1;
}

.hero-headshot {
    position: relative;
}

.headshot-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(var(--color-secondary-dark), var(--color-secondary-dark)) padding-box,
                linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end)) border-box;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.headshot-image:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.4);
}

.hero-text {
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.cta-arrow {
    transition: transform var(--transition-fast);
}

.hero-cta:hover .cta-arrow {
    transform: translateY(3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 1.5rem;
    height: 1.5rem;
    border-left: 2px solid var(--color-text-muted);
    border-bottom: 2px solid var(--color-text-muted);
    transform: rotate(-45deg);
    animation: scroll-down 2s infinite;
}

@keyframes scroll-down {
    0%, 100% {
        transform: rotate(-45deg) translate(0, 0);
        opacity: 0;
    }
    50% {
        transform: rotate(-45deg) translate(5px, 5px);
        opacity: 1;
    }
}

/* ============================================
   Section Styles
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
    margin: 0 auto;
    border-radius: 2px;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-secondary-dark);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about-text {
    flex: 1;
}

.about-intro {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

/* Links within bio text */
.about-text a {
    color: var(--color-accent-start);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.about-text a:hover {
    color: var(--color-accent-end);
    border-bottom-color: var(--color-accent-end);
}

.skills {
    margin-top: var(--spacing-md);
}

.skills-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 20px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
}

.about-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-card {
    width: 100%;
    max-width: 400px;
    border-radius: 20px;
    border: 2px solid var(--color-border);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.visual-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.2);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-primary-dark);
}

.contact-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: 15px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-medium);
    min-width: 120px;
}

.social-link:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: var(--color-accent-start);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.social-link svg {
    width: 32px;
    height: 32px;
    transition: transform var(--transition-fast);
}

.social-link:hover svg {
    transform: scale(1.1);
}

.social-link span {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Lightspeed logo styling */
.lightspeed-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.social-link:hover .lightspeed-logo {
    transform: scale(1.1);
    filter: brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(200deg);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    background-color: var(--color-secondary-dark);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--color-border);
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ============================================
   Responsive Design - Tablet
   ============================================ */
@media (min-width: 768px) {
    .hero-content {
        flex-direction: row;
        gap: var(--spacing-lg);
    }

    .headshot-image {
        width: 180px;
        height: 180px;
    }

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

    .hero-title {
        font-size: 3.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 3rem;
    }

    .about-content {
        flex-direction: row;
        align-items: center;
    }

    .nav-menu {
        gap: 2.5rem;
    }
}

/* ============================================
   Responsive Design - Desktop
   ============================================ */
@media (min-width: 1024px) {
    .headshot-image {
        width: 200px;
        height: 200px;
    }

    .hero-title {
        font-size: 4.5rem;
    }

    .hero-subtitle {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 3.5rem;
    }

    .container {
        padding: 0 2rem;
    }

    .nav-container {
        padding: 1.25rem 2rem;
    }

    .social-links {
        gap: 3rem;
    }

    /* Hover parallax effect enabled on desktop only */
    .hero-background {
        transition: transform 0.3s ease-out;
    }
}

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

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent-start);
    outline-offset: 2px;
}

/* ============================================
   Cursor Trail Effect
   ============================================ */
.cursor-trail {
    position: fixed;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent-start);
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    mix-blend-mode: screen;
}

/* Trail dot colors and sizing */
#cursor-trail-1 {
    background: var(--color-accent-start);
}

#cursor-trail-2 {
    background: var(--color-accent-end);
    width: 10px;
    height: 10px;
}

#cursor-trail-3 {
    background: var(--color-accent-start);
    width: 8px;
    height: 8px;
}

/* Hide cursor trail on touch devices */
@media (pointer: coarse) {
    .cursor-trail {
        display: none;
    }
}