:root {
    /* Color Palette - Neutral Dark with Muted Blue */
    --bg-primary: #0f1115;
    --bg-secondary: #1a1d24;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-blue: #3b82f6; /* Muted blue */
    --accent-blue-hover: #60a5fa;
    --accent-blue-transparent: rgba(59, 130, 246, 0.15);
    
    --border-color: #2e3441;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Spacing & Layout */
    --max-width: 800px;
    --radius-sm: 6px;
    --radius-md: 8px;
    
    /* Animation */
    --transition-fast: 0.2s ease-in-out;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-y: scroll;
}

h1, h2, h3, h4 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1rem;
}

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

a:hover {
    color: var(--accent-blue-hover);
}

ul {
    list-style: none;
}

/* Layout Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation Bar */
.nav-bar {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.nav-link.active {
    color: var(--accent-blue-hover);
    background-color: var(--accent-blue-transparent);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Hero Section */
.hero {
    padding: 6rem 0 4rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.name {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--text-secondary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
}

.tagline {
    font-size: 1.125rem;
    max-width: 600px;
    margin-bottom: 2rem;
}

/* Buttons / Links */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn.primary {
    background-color: var(--accent-blue-transparent);
    color: var(--accent-blue-hover);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.btn.primary:hover {
    background-color: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.btn.secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn.secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background-color: var(--bg-secondary);
    transform: translateY(-2px);
}

/* Sections */
.section {
    margin-bottom: 5rem;
}

.section h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.section h3::after {
    content: "";
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
    margin-left: 1.5rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.skill-category:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
}

.skill-category h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.skill-category ul li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.25rem;
}

.skill-category ul li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

/* Timeline / Experience */
.timeline-item {
    margin-bottom: 2.5rem;
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--border-color);
}

.timeline-item::before {
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--bg-primary);
    border: 2px solid var(--accent-blue);
    border-radius: 50%;
    left: -7px;
    top: 6px;
    transition: background-color var(--transition-fast);
}

.timeline-item:hover::before {
    background-color: var(--accent-blue);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.timeline-header h4 {
    margin-bottom: 0;
    font-size: 1.2rem;
}

.timeline-date {
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
}

.timeline-company {
    color: var(--accent-blue);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

/* App Cards & Grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.app-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.app-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.app-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.app-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background-color: var(--accent-blue-transparent);
    border: 1px solid rgba(59, 130, 246, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
}

.app-icon-wrapper svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.app-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-blue-hover);
    background-color: var(--accent-blue-transparent);
    border: 1px solid rgba(59, 130, 246, 0.25);
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    letter-spacing: 0.03em;
}

.app-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}

.app-domain {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.app-domain svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.app-card-body {
    margin-bottom: 1.25rem;
}

.app-card-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.app-url-btn {
    width: 100%;
    text-align: center;
    justify-content: center;
}

.app-store-section {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.app-store-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.app-store-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.store-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.store-chip:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
    background-color: var(--accent-blue-transparent);
    transform: translateY(-1px);
}

.store-chip svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.no-apps-badge {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0;
}

/* Footer */
.footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 5rem;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Animations */
.fade-in-container {
    animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(10px);
}

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

/* Responsive */
@media (max-width: 640px) {
    .name {
        font-size: 2.25rem;
    }
    
    .hero {
        padding: 4rem 0 3rem;
    }

    .timeline-header {
        flex-direction: column;
    }
}