/* ========================================
   JP Earnest Portfolio - Soft + Bold Contrast Theme
   Modern, Approachable, Orange Accent
   ======================================== */

/* ========================================
   CSS Variables & Theme
   ======================================== */
:root {
    /* Colors - Dark Mode Default */
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-bg-elevated: #1a1a1a;
    --color-surface: rgba(26, 26, 26, 0.9);
    --color-surface-elevated: rgba(34, 34, 34, 0.95);
    --color-surface-glass: rgba(17, 17, 17, 0.85);
    --color-text: #ffffff;
    --color-text-secondary: #999999;
    --color-text-muted: #666666;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 107, 53, 0.4);

    /* Accent Colors - Bold Orange */
    --color-primary: #ff6b35;
    --color-primary-bright: #ff8555;
    --color-primary-hover: #ff5722;
    --color-primary-light: rgba(255, 107, 53, 0.12);
    --color-primary-glow: rgba(255, 107, 53, 0.25);
    --color-accent: #ff6b35;
    --color-accent-bright: #ff8555;
    --color-success: #22c55e;
    --color-success-light: rgba(34, 197, 94, 0.12);
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #ff8555 100%);
    --gradient-text: linear-gradient(135deg, #ff6b35 0%, #ff8555 100%);
    --gradient-glow: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
    --gradient-mesh:
        radial-gradient(at 40% 20%, rgba(255, 107, 53, 0.08) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(255, 107, 53, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 80%, rgba(255, 107, 53, 0.06) 0px, transparent 50%);

    /* Shadows - Soft */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 4px 20px rgba(255, 107, 53, 0.2);
    --shadow-glow-strong: 0 8px 30px rgba(255, 107, 53, 0.3);

    /* Typography */
    --font-sans: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius - Soft & Rounded */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;
}

/* Light Mode */
[data-theme="light"] {
    --color-bg: #fafafa;
    --color-bg-alt: #f5f5f5;
    --color-bg-elevated: #ffffff;
    --color-surface: rgba(255, 255, 255, 0.95);
    --color-surface-elevated: rgba(255, 255, 255, 0.98);
    --color-surface-glass: rgba(250, 250, 250, 0.9);
    --color-text: #111111;
    --color-text-secondary: #555555;
    --color-text-muted: #888888;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(255, 107, 53, 0.5);

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 4px 20px rgba(255, 107, 53, 0.15);

    --gradient-mesh:
        radial-gradient(at 40% 20%, rgba(255, 107, 53, 0.06) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(255, 107, 53, 0.04) 0px, transparent 50%);
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

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

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

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    color: var(--color-text-secondary);
}

strong {
    color: var(--color-text);
    font-weight: 600;
}

/* Gradient Text Utility */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-4xl) 0;
    position: relative;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-label::before {
    display: none;
}

.section-title {
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-surface-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition-base);
}

.nav.scrolled {
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 2px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-text);
}

.logo-text {
    color: var(--color-text);
}

.logo-cursor {
    width: 3px;
    height: 1.5rem;
    background: var(--color-primary);
    animation: cursor-blink 1s infinite;
    transition: opacity 0s;
}

.logo-cursor.hidden {
    animation: none;
    opacity: 0;
}

@keyframes cursor-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

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

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

.nav-cta {
    color: var(--color-text) !important;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-cta:hover {
    color: var(--color-primary) !important;
}

.nav-cta::after {
    display: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.theme-toggle:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-border-hover);
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: block;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-actions {
        z-index: 1002;
        position: relative;
    }

    .nav-toggle {
        display: flex;
    }

    /* Ensure hamburger/X is visible in both themes when menu is open */
    .nav-toggle.active span {
        background: #ffffff;
    }

    .nav-menu {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        background-color: #0a0a0a !important;
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-md);
        z-index: 1000;
        padding: var(--spacing-xl) 0;
        margin: 0;
        overflow-y: auto;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        text-align: center;
        list-style: none;
    }

    .nav-link {
        font-size: 1.25rem;
        display: block;
        padding: var(--spacing-sm) var(--spacing-lg);
        color: #ffffff;
    }

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

    .nav-cta {
        margin-top: var(--spacing-sm);
    }

    /* Theme toggle in mobile menu should also be visible */
    .nav-menu.active ~ .nav-actions .theme-toggle {
        color: #ffffff;
    }
}

/* Extra small screens - even more compact */
@media (max-width: 768px) and (max-height: 600px) {
    .nav-menu {
        gap: var(--spacing-sm);
        padding: var(--spacing-lg) 0;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: calc(var(--nav-height) + var(--spacing-2xl)) var(--spacing-lg) var(--spacing-2xl);
    overflow: hidden;
}

/* Hero Background Layers */
.hero-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Animated Grid Pattern - Subtle */
.grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 107, 53, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 107, 53, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* Neural Network Canvas */
.neural-network {
    position: absolute;
    inset: 0;
    opacity: 0.5;
}

/* Light mode: increase opacity since orange needs more contrast against light bg */
[data-theme="light"] .neural-network {
    opacity: 0.65;
}

/* Floating Gradient Orbs */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
}

.gradient-orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    opacity: 0.08;
    animation-delay: 0s;
}

.gradient-orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    bottom: -150px;
    left: -100px;
    opacity: 0.06;
    animation-delay: -10s;
}

.gradient-orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: 40%;
    right: 10%;
    opacity: 0.05;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

/* Particles */
.particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particle-rise 10s linear infinite;
}

@keyframes particle-rise {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-100vh) scale(1);
    }
}

/* Hero Content */
.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
    animation: fade-in 0.8s ease forwards;
}

.pulse {
    width: 10px;
    height: 10px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px transparent;
    }
}

.hero-title {
    margin-bottom: var(--spacing-xl);
    line-height: 1.1;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: title-reveal 0.8s ease forwards;
}

.title-line:nth-child(1) { animation-delay: 0.2s; }
.title-line:nth-child(2) { animation-delay: 0.4s; }
.title-line:nth-child(3) { animation-delay: 0.6s; }

@keyframes title-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.typing-container {
    display: inline-flex;
    align-items: center;
    /* Prevent layout shift by maintaining consistent height */
    min-height: 1.1em;
    line-height: 1.1;
}

/* Use ::after to maintain height when typing-text is empty */
.typing-container::before {
    content: '\200b'; /* Zero-width space to maintain line height */
}

.typing-text {
    color: var(--color-primary);
}

.typing-cursor {
    display: inline-block;
    width: 4px;
    height: 1em;
    background: var(--color-primary);
    margin-left: 4px;
    animation: cursor-blink 0.8s infinite;
    border-radius: 2px;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 650px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    opacity: 0;
    animation: fade-in 0.8s ease forwards 0.8s;
}

@keyframes fade-in {
    to {
        opacity: 1;
    }
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fade-in 0.8s ease forwards 1s;
}

/* Buttons - Soft & Rounded */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
    position: relative;
}

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

.btn-primary:hover {
    background: var(--color-primary-bright);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-strong);
}

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

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-tertiary {
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn-tertiary:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

.btn-tertiary svg {
    margin-right: 6px;
}

/* Tech Stack */
.hero-stack {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    opacity: 0;
    animation: fade-in 0.8s ease forwards 1.2s;
}

.stack-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.stack-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.stack-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.stack-item svg {
    width: 24px;
    height: 24px;
}

.stack-item:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    background: var(--color-primary-light);
}

.stack-item[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    white-space: nowrap;
    box-shadow: var(--shadow-lg);
    color: var(--color-text);
    z-index: 10;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    animation: bounce-scroll 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    transform: rotate(45deg);
}

@keyframes bounce-scroll {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(12px); }
}

/* ========================================
   About Section
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-2xl);
    align-items: start;
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

.about-content p {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-intro {
    font-size: 1.2rem !important;
    color: var(--color-text);
}

.about-interests {
    margin-top: var(--spacing-xl);
}

.about-interests h3 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    transform: translateY(-2px);
}

.tag[data-tooltip] {
    position: relative;
    cursor: help;
}

.tag[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 400;
    white-space: nowrap;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

/* Stats Cards */
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition-fast);
    text-decoration: none;
    color: inherit;
    min-height: 120px;
}

a.stat-card {
    cursor: pointer;
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.stat-card[data-tooltip] {
    position: relative;
    cursor: help;
}

.stat-card[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 400;
    white-space: nowrap;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-icon {
    display: block;
    width: 2rem;
    height: 2rem;
    margin: 0 auto var(--spacing-xs) auto;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text);
    font-weight: 500;
}

/* ========================================
   What I'm Building Section
   ======================================== */
.building-intro {
    max-width: 800px;
    margin-bottom: var(--spacing-2xl);
}

.building-intro p {
    font-size: 1.15rem;
    line-height: 1.8;
}

.building-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-xl);
}

.building-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    transition: var(--transition-base);
}

.building-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-border-hover);
}

.building-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.building-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.building-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.building-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.building-tags span {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-alt);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-mono);
}

/* ========================================
   Blog Cards
   ======================================== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.blog-card {
    display: block;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    text-decoration: none;
    transition: var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-border-hover);
}

.blog-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.blog-card-date {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
    font-family: var(--font-mono);
}

.blog-card-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.3;
    margin: var(--spacing-xs) 0;
}

.blog-card-excerpt {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.blog-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.blog-card:hover .blog-card-link {
    gap: 10px;
}

.blog-card-link svg {
    transition: var(--transition-fast);
}

.blog-card:hover .blog-card-link svg {
    transform: translateX(4px);
}

/* ========================================
   Experience Timeline
   ======================================== */
.timeline {
    position: relative;
    padding-left: var(--spacing-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-2xl) - 8px);
    top: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 3px solid var(--color-primary);
    z-index: 1;
    transition: var(--transition-fast);
}

.timeline-item:first-child .timeline-marker {
    background: var(--color-primary);
    box-shadow: 0 0 0 6px var(--color-primary-light);
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.2);
    box-shadow: var(--shadow-glow);
}

.timeline-content {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: var(--transition-fast);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.timeline-header h3 {
    font-size: 1.25rem;
}

.timeline-company {
    color: var(--color-primary);
    font-weight: 500;
}

.timeline-date {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
}

.timeline-location {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.timeline-details {
    padding-left: var(--spacing-lg);
}

.timeline-details li {
    position: relative;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    line-height: 1.7;
}

.timeline-details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* ========================================
   Certifications
   ======================================== */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-md);
}

.cert-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    transition: var(--transition-fast);
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cert-active:hover {
    border-color: var(--color-success);
}

.cert-inactive {
    opacity: 0.7;
}

.cert-inactive:hover {
    border-color: var(--color-text-muted);
    opacity: 1;
}

.cert-badge {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
}

.cert-badge svg {
    width: 28px;
    height: 28px;
}

.cert-active .cert-badge {
    background: var(--color-success-light);
    color: var(--color-success);
}

.cert-inactive .cert-badge {
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
}

.cert-info h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.cert-status {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

.status-active {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-inactive {
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
}

.cert-date {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* Certifications Accordion */
.certs-accordion {
    margin-top: var(--spacing-xl);
}

.certs-accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    cursor: pointer;
}

.certs-accordion-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.accordion-icon {
    transition: var(--transition-base);
}

.certs-accordion-toggle[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

.certs-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.certs-accordion-content.expanded {
    max-height: 2000px;
    margin-top: var(--spacing-md);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.contact-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: var(--transition-fast);
}

.contact-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.contact-link svg {
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.contact-link:hover svg {
    color: var(--color-primary);
}

/* Mobile contact layout - email on first row, social links on second */
@media (max-width: 600px) {
    .contact-content .contact-links {
        display: grid !important;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
        width: 100%;
    }

    .contact-content .contact-links .contact-link:first-child {
        grid-column: 1 / -1 !important;
        width: 100% !important;
        justify-content: center;
    }

    .contact-content .contact-links .contact-link:not(:first-child) {
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-alt);
}

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

.footer-content p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

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

/* ========================================
   Blog & Projects Pages
   ======================================== */
.page-header {
    padding: calc(var(--nav-height) + var(--spacing-4xl)) var(--spacing-lg) var(--spacing-2xl);
    background: var(--color-bg-alt);
    text-align: center;
    position: relative;
}

.page-header h1 {
    margin-bottom: var(--spacing-md);
}

.page-header p {
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

.posts-grid, .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-xl);
    padding: var(--spacing-3xl) var(--spacing-lg);
    max-width: var(--container-max);
    margin: 0 auto;
}

.post-card, .project-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: var(--transition-base);
}

.post-card:hover, .project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-border-hover);
}

.post-card-content, .project-card-content {
    padding: var(--spacing-xl);
}

.project-preview-image {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-subtle);
    border-bottom: 1px solid var(--color-border);
}

.project-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
}

.project-icon svg {
    width: 100%;
    height: 100%;
}

.post-card-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.post-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

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

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

.read-more svg {
    transition: var(--transition-fast);
}

.read-more:hover svg {
    transform: translateX(6px);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.project-card p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-tags span {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-subtle);
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-lg);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-muted);
}

.empty-state h2 {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    max-width: 400px;
    margin: 0 auto;
}

/* ========================================
   Project Detail Page
   ======================================== */
.project-detail {
    padding: calc(var(--nav-height) + var(--spacing-2xl)) var(--spacing-lg) var(--spacing-3xl);
}

.project-detail-container {
    max-width: 800px;
    margin: 0 auto;
}

.project-detail-header {
    margin-bottom: var(--spacing-2xl);
}

.project-detail-header h1 {
    margin-bottom: var(--spacing-md);
}

.project-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.project-detail-date {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.project-detail-content {
    line-height: 1.9;
}

.project-detail-content h2 {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.project-detail-content p {
    margin-bottom: var(--spacing-md);
}

.project-detail-content ul, .project-detail-content ol {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.project-detail-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.project-detail-content code {
    font-family: var(--font-mono);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-size: 0.9em;
    color: var(--color-primary);
}

.project-detail-content pre {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

.project-detail-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text);
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 768px) {
    .hero {
        padding-top: calc(var(--nav-height) + var(--spacing-xl));
        min-height: calc(100vh - var(--nav-height));
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }

    .hero-stack {
        flex-direction: column;
        align-items: center;
    }

    .stack-icons {
        flex-wrap: wrap;
        justify-content: center;
    }

    .about-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--spacing-md);
        width: 280px;
        max-width: 280px;
        margin: 0 auto;
    }

    .stat-card {
        padding: var(--spacing-md);
        aspect-ratio: 1;
        min-height: unset;
        width: 100%;
        box-sizing: border-box;
    }

    .stat-icon {
        width: 24px;
        height: 24px;
    }

    .stat-label {
        font-size: 0.7rem;
        line-height: 1.2;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    /* Hide CSS tooltips on mobile - JavaScript handles them */
    .tag[data-tooltip]:hover::after,
    .stat-card[data-tooltip]:hover::after,
    .stack-item[data-tooltip]:hover::after {
        display: none !important;
    }

    /* JavaScript-created mobile tooltip */
    .mobile-tooltip {
        position: fixed;
        background: var(--color-bg-elevated);
        color: var(--color-text);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.85rem;
        white-space: nowrap;
        z-index: 10000;
        box-shadow: var(--shadow-lg);
        pointer-events: none;
    }

    .stack-item {
        width: 42px;
        height: 42px;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-cta {
        flex-direction: column;
    }

    .timeline {
        padding-left: var(--spacing-xl);
    }

    .timeline-marker {
        left: calc(-1 * var(--spacing-xl) - 8px);
    }

    .timeline-content {
        padding: var(--spacing-lg);
    }

    .timeline-content:hover {
        transform: none;
    }

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

    .cert-card {
        padding: var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .building-card:hover {
        transform: none;
    }

    .scroll-indicator {
        display: none;
    }

    .neural-network {
        opacity: 0.35;
    }

    [data-theme="light"] .neural-network {
        opacity: 0.45;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .about-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--spacing-sm);
        width: 240px;
        max-width: 240px;
        margin: 0 auto;
    }

    .stat-card {
        padding: var(--spacing-sm);
        aspect-ratio: 1;
        min-height: unset;
        width: 100%;
        box-sizing: border-box;
    }

    .stat-icon {
        width: 20px;
        height: 20px;
    }

    .stat-label {
        font-size: 0.65rem;
        line-height: 1.2;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .stat-number {
        font-size: 1.5rem;
    }
}

/* ========================================
   Scroll Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Staggered animations for grids */
.stagger-animation > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-animation.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-animation.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-animation.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-animation.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-animation.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-animation.visible > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-animation.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Utilities
   ======================================== */
.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;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Parallax layers */
[data-parallax] {
    will-change: transform;
}

/* Performance optimizations */
.paused * {
    animation-play-state: paused !important;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}