/* ================================================================
   joe.janos — Apple-Inspired Personal Website
   Design System: White + Blue accents, clean typography, smooth motion
   ================================================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Colors */
    --white: #ffffff;
    --off-white: #fbfbfd;
    --gray-50: #f5f5f7;
    --gray-100: #e8e8ed;
    --gray-200: #d2d2d7;
    --gray-400: #98989d;
    --gray-600: #6e6e73;
    --gray-800: #1d1d1f;
    --black: #000000;

    /* Blue Palette (Apple-style) */
    --blue-50: #f0f5ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-400: #60a5fa;
    --blue-500: #0071e3;
    --blue-600: #0058b9;
    --blue-700: #004494;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-hero: clamp(2.5rem, 6vw, 5rem);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 52px;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 100px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --duration-fast: 0.2s;
    --duration-normal: 0.4s;
    --duration-slow: 0.6s;
    --duration-glacial: 1s;
}


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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

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

::selection {
    background-color: var(--blue-200);
    color: var(--gray-800);
}


/* ---- Utilities ---- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}


/* ================================================================
   NAVIGATION
   ================================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    background-color: rgba(255, 255, 255, 0.72);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    transition: background-color var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
    background-color: rgba(255, 255, 255, 0.88);
    box-shadow: var(--shadow-sm);
}

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

.nav-logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--gray-800);
    transition: opacity var(--duration-fast) var(--ease-out);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-600);
    transition: color var(--duration-fast) var(--ease-out);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--blue-500);
    transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav-link:hover {
    color: var(--gray-800);
}

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

.nav-link--cta {
    color: var(--white);
    background-color: var(--blue-500);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: background-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

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

.nav-link--cta:hover {
    background-color: var(--blue-600);
    color: var(--white);
    transform: scale(1.04);
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    width: 24px;
    height: 20px;
    justify-content: center;
    position: relative;
    z-index: 1100;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 1.5px;
    background-color: var(--gray-800);
    border-radius: 2px;
    transition: transform var(--duration-normal) var(--ease-out-expo),
                opacity var(--duration-fast) var(--ease-out);
}

.nav-toggle.active span:first-child {
    transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle.active span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out-expo);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
}

.mobile-link {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--gray-800);
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                transform var(--duration-normal) var(--ease-out-expo),
                color var(--duration-fast) var(--ease-out);
}

.mobile-menu.active .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu.active .mobile-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .mobile-link:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.active .mobile-link:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.active .mobile-link:nth-child(4) { transition-delay: 0.25s; }

.mobile-link:hover {
    color: var(--blue-500);
}


/* ================================================================
   HERO
   ================================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    position: relative;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

.hero-content {
    max-width: 820px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 6px 16px;
    background-color: var(--blue-50);
    border: 1px solid var(--blue-100);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--blue-500);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background-color: #34c759;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
    color: var(--gray-800);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out-expo) 0.35s forwards;
}

.hero-name {
    background: linear-gradient(135deg, var(--blue-500) 0%, var(--blue-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(var(--font-size-lg), 2.2vw, var(--font-size-xl));
    font-weight: 400;
    color: var(--gray-600);
    line-height: 1.6;
    max-width: 560px;
    margin: 0 auto var(--space-2xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out-expo) 0.5s forwards;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out-expo) 0.65s forwards;
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out-expo) 1.2s forwards;
}

.hero-scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--gray-200), transparent);
    position: relative;
    overflow: hidden;
}

.hero-scroll-line::after {
    content: '';
    position: absolute;
    top: -48px;
    left: 0;
    width: 100%;
    height: 48px;
    background: linear-gradient(to bottom, transparent, var(--blue-500));
    animation: scrollLine 2s var(--ease-out) infinite;
}


/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 14px 28px;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--blue-500);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--blue-600);
    transform: scale(1.04);
    box-shadow: 0 4px 20px rgba(0, 113, 227, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--blue-500);
    border: 1.5px solid var(--blue-200);
}

.btn-secondary:hover {
    background-color: var(--blue-50);
    border-color: var(--blue-500);
    transform: scale(1.04);
}

.btn-large {
    padding: 18px 36px;
    font-size: var(--font-size-lg);
}


/* ================================================================
   SECTIONS — COMMON
   ================================================================ */
.section {
    padding: var(--space-5xl) 0;
}

.section-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--blue-500);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--gray-800);
    margin-bottom: var(--space-3xl);
}


/* ================================================================
   ABOUT
   ================================================================ */
.section--about {
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.about-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.stat-card {
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    transition: transform var(--duration-normal) var(--ease-out-expo),
                box-shadow var(--duration-normal) var(--ease-out-expo);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--gray-800);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    font-weight: 500;
}


/* ================================================================
   WORK
   ================================================================ */
.section--work {
    background-color: var(--gray-50);
}

.work-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-xl);
}

.work-card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: transform var(--duration-normal) var(--ease-out-expo),
                box-shadow var(--duration-normal) var(--ease-out-expo);
    cursor: pointer;
}

.work-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.work-card--large {
    grid-column: 1 / -1;
}

.work-card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--blue-50) 0%, var(--gray-50) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.work-card--large .work-card-image {
    aspect-ratio: 21 / 9;
}

.work-card-placeholder {
    color: var(--gray-200);
    transition: color var(--duration-normal) var(--ease-out),
                transform var(--duration-normal) var(--ease-out-expo);
}

.work-card:hover .work-card-placeholder {
    color: var(--blue-400);
    transform: scale(1.1);
}

.work-card-info {
    padding: var(--space-xl) var(--space-xl) var(--space-2xl);
}

.work-card-tag {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--blue-500);
    background-color: var(--blue-50);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    display: inline-block;
    margin-bottom: var(--space-sm);
}

.work-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-800);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
}

.work-card-desc {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    line-height: 1.6;
}


/* ================================================================
   EXPERIENCE / TIMELINE
   ================================================================ */
.section--experience {
    background-color: var(--white);
}

.timeline {
    position: relative;
    padding-left: var(--space-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 5px;
    bottom: 8px;
    width: 1.5px;
    background: linear-gradient(to bottom, var(--blue-200), var(--gray-100));
}

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

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

.timeline-dot {
    position: absolute;
    left: calc(-1 * var(--space-2xl) + 0px);
    top: 8px;
    width: 12px;
    height: 12px;
    background-color: var(--white);
    border: 2px solid var(--blue-500);
    border-radius: 50%;
    transition: background-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

.timeline-item:hover .timeline-dot {
    background-color: var(--blue-500);
    transform: scale(1.3);
}

.timeline-content {
    padding: var(--space-xl);
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: transform var(--duration-normal) var(--ease-out-expo),
                box-shadow var(--duration-normal) var(--ease-out-expo);
}

.timeline-item:hover .timeline-content {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-xs);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.timeline-role {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-800);
    letter-spacing: -0.01em;
}

.timeline-date {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--blue-500);
}

.timeline-company {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--gray-600);
    margin-bottom: var(--space-xs);
}

.timeline-desc {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    line-height: 1.6;
}


/* ================================================================
   CONTACT
   ================================================================ */
.section--contact {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    text-align: center;
}

.contact-content {
    max-width: 640px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--gray-800);
    margin-bottom: var(--space-lg);
}

.contact-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-400);
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
}

.contact-socials {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.social-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-400);
    transition: color var(--duration-fast) var(--ease-out);
    position: relative;
}

.social-link::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--blue-500);
    transition: width var(--duration-normal) var(--ease-out-expo);
}

.social-link:hover {
    color: var(--blue-500);
}

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


/* ================================================================
   FOOTER
   ================================================================ */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--gray-100);
}

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

.footer-logo {
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--gray-800);
    letter-spacing: -0.02em;
}

.footer-copy {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
}


/* ================================================================
   SCROLL REVEAL ANIMATIONS
   ================================================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--duration-slow) var(--ease-out-expo),
                transform var(--duration-slow) var(--ease-out-expo);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}


/* ================================================================
   KEYFRAMES
   ================================================================ */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes scrollLine {
    0% { top: -48px; }
    100% { top: 48px; }
}


/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .about-stats {
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 48px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .section {
        padding: var(--space-4xl) 0;
    }

    .hero {
        padding: calc(var(--nav-height) + var(--space-2xl)) var(--space-lg) var(--space-3xl);
    }

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

    .work-card--large {
        grid-column: 1;
    }

    .work-card--large .work-card-image {
        aspect-ratio: 16 / 9;
    }

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

    .timeline::before {
        left: 4px;
    }

    .timeline-dot {
        left: calc(-1 * var(--space-xl) + -1px);
        width: 10px;
        height: 10px;
    }

    .timeline-header {
        flex-direction: column;
        gap: 2px;
    }

    .contact-socials {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }

    .footer-container {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-lg);
    }

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
        max-width: 100%;
    }

    .stat-card {
        padding: var(--space-lg);
    }
}