/* Base Styles */
:root {
    /* Apple-inspired color palette */
    --color-background: #000000;
    --color-surface: #1a1a1a;
    --color-surface-variant: #2c2c2c;
    --color-primary: #0071e3;
    --color-primary-variant: #0077ed;
    --color-secondary: #86868b;
    --color-accent: #ff375f;
    --color-accent-variant: #ff2d55;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;
    --color-border: #424245;
    --color-success: #65c466;
    --color-error: #ff453a;
    
    /* Typography */
    --font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-md: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;  /* 18px */
    --font-size-xl: 1.25rem;   /* 20px */
    --font-size-2xl: 1.5rem;   /* 24px */
    --font-size-3xl: 2rem;     /* 32px */
    --font-size-4xl: 2.5rem;   /* 40px */
    --font-size-5xl: 3rem;     /* 48px */
    --font-size-6xl: 4rem;     /* 64px */
    --font-size-7xl: 5rem;     /* 80px */
    
    /* Spacing */
    --spacing-xs: 0.25rem;     /* 4px */
    --spacing-sm: 0.5rem;      /* 8px */
    --spacing-md: 1rem;        /* 16px */
    --spacing-lg: 1.5rem;      /* 24px */
    --spacing-xl: 2rem;        /* 32px */
    --spacing-2xl: 3rem;       /* 48px */
    --spacing-3xl: 4rem;       /* 64px */
    --spacing-4xl: 6rem;       /* 96px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;      /* 4px */
    --radius-md: 0.5rem;       /* 8px */
    --radius-lg: 0.75rem;      /* 12px */
    --radius-xl: 1rem;         /* 16px */
    --radius-2xl: 1.5rem;      /* 24px */
    --radius-full: 9999px;     /* Fully rounded */
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-very-slow: 0.8s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 20px rgba(0, 113, 227, 0.5);
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
    cursor: pointer;
    font-family: inherit;
    background: none;
    border: none;
    outline: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

section {
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-6xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-2xl);
}

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

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: var(--spacing-md);
}

.preloader-text {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all var(--transition-fast);
    text-align: center;
}

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

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

.btn-secondary {
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background-color: var(--color-surface);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    padding: calc(var(--spacing-sm) - 2px) calc(var(--spacing-lg) - 2px);
    margin-left: var(--spacing-md);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: var(--color-primary);
    transition: all var(--transition-normal);
    z-index: -1;
}

.btn-outline:hover {
    color: white;
}

.btn-outline:hover::before {
    width: 100%;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background-color: rgba(0, 0, 0, 0.8);
    transition: all var(--transition-normal);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-fast);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    display: inline-block;
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px; /* Account for fixed navbar */
    position: relative;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-text-container {
    position: relative;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(90deg, var(--color-text-primary), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    min-height: 3rem; /* Reserve space for typed text */
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-cta {
    margin-top: var(--spacing-lg);
    display: flex;
    align-items: center;
}

.hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    z-index: 0;
}

.hero-visual-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-visual-element {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(0, 113, 227, 0.3) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    animation: pulse 5s ease-in-out infinite;
}

.hero-3d-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#hero-canvas {
    width: 100%;
    height: 100%;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.scroll-indicator:hover {
    opacity: 1;
}

.scroll-indicator-text {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.scroll-indicator-icon {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    position: relative;
}

.scroll-indicator-icon::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--color-text-primary);
    border-radius: 50%;
    animation: scrollDown 2s ease infinite;
}

@keyframes scrollDown {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(20px);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(30px);
    }
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-name {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.about-location {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
}

.about-location::before {
    content: '📍';
    margin-right: var(--spacing-sm);
}

.about-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.about-visual-element {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--color-surface), var(--color-surface-variant));
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.about-visual-element::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Skills Section */
.skills-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.skills-category {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.category-title {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    position: relative;
    display: inline-block;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--color-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-lg);
}

.skill-card {
    background-color: var(--color-surface-variant);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-md);
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-name {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.skill-level {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.certifications-carousel {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    padding: var(--spacing-md) 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.certifications-carousel::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.certification-card {
    flex: 0 0 auto;
    width: 250px;
    background-color: var(--color-surface-variant);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.certification-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: var(--shadow-lg);
}

.certification-name {
    font-weight: 500;
    text-align: center;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.carousel-control {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.carousel-control:hover {
    background-color: var(--color-primary);
}

/* Experience Section */
.experience-timeline {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.timeline-track {
    display: flex;
    gap: var(--spacing-xl);
    overflow-x: auto;
    padding: var(--spacing-md) 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.timeline-track::-webkit-scrollbar {
    display: none;
}

.timeline-item {
    flex: 0 0 auto;
    width: 300px;
    position: relative;
}

.timeline-content {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-role {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.timeline-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.timeline-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.timeline-control {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.timeline-control:hover {
    background-color: var(--color-primary);
}

/* Achievements Section */
.achievements {
    padding: var(--spacing-3xl) 0;
}

.achievements-content {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.achievement-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.achievement-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-fill-color: transparent;
}

.achievement-details {
    flex: 1;
}

.achievement-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.achievement-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-surface-variant);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-weight: 500;
}

.contact-form {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

input, textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-surface-variant);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.2);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
.footer {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-3xl);
}

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

.footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* Highlight */
.highlight {
    color: var(--color-primary);
    font-weight: 500;
    position: relative;
    transition: all var(--transition-fast);
}

.highlight:hover {
    color: var(--color-primary-variant);
}