/* ==========================================================================
   Modern Portfolio Styles
   A clean, minimal, and personal design for Anurag Pathak's portfolio
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Refined palette */
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-primary-subtle: #eff6ff;

    --color-accent: #06b6d4;
    --color-accent-light: #22d3ee;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

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

    /* Font Sizes - Fluid typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
    --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
    --text-5xl: clamp(3rem, 2rem + 5vw, 4.5rem);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.25rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3.5rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;

    /* Navbar height — single source of truth for fixed-nav offset.
       Hero padding-top, scroll-padding-top, and mobile menu offset
       all derive from this. Override per-breakpoint below. */
    --nav-height: 72px;

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #f1f5f9;
        --color-text-secondary: #94a3b8;
        --color-text-muted: #64748b;

        --color-bg: #0f172a;
        --color-bg-alt: #1e293b;
        --color-bg-dark: #020617;

        --color-border: #334155;
        --color-border-light: #1e293b;

        --color-primary-subtle: #1e3a5f;
    }
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

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

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    word-wrap: break-word;
}

/* Paragraph text justification for better readability */
p {
    text-align: left;
    hyphens: auto;
    -webkit-hyphens: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 768px) {
    p {
        text-align: justify;
        text-justify: inter-word;
    }
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

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

.lead {
    font-size: var(--text-lg);
    color: var(--color-text);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.6rem 1.2rem;
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    min-height: 42px;
    white-space: nowrap;
}

@media (max-width: 640px) {
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--text-xs);
        min-height: 40px;
    }
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-scroll {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: 2px solid #667eea;
    gap: var(--space-sm);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-scroll:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    border-color: #764ba2;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-scroll i {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(4px); }
    60% { transform: translateY(2px); }
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

@media (prefers-color-scheme: dark) {
    .nav {
        background: rgba(15, 23, 42, 0.95);
    }
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

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

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

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

.nav-menu {
    display: flex;
    gap: var(--space-sm);
    list-style: none;
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-md);
    z-index: 1001;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.nav-toggle span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--color-text);
    border-radius: 3px;
    transition: all var(--transition-base);
    transform-origin: center;
}

/* Hamburger to X animation */
.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

@media (max-width: 968px) {
    .nav-toggle {
        display: flex;
        position: relative;
        z-index: 1002;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100vh;
        height: 100dvh;
        flex-direction: column;
        background-color: #ffffff;
        padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: 1000;
        gap: var(--space-md);
        overflow-y: auto;
        visibility: hidden;
    }

    .nav-menu.active {
        transform: translateX(0);
        visibility: visible;
    }

    .nav-link {
        font-size: var(--text-xl);
        padding: var(--space-md) var(--space-lg);
        border-radius: var(--radius-md);
        text-align: left;
        display: block;
        color: #1e293b;
    }

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

    /* Prevent body scroll when nav is open */
    body.nav-open {
        overflow: hidden;
    }
}

@media (max-width: 968px) and (prefers-color-scheme: dark) {
    .nav-menu {
        background-color: #0f172a;
    }

    .nav-link {
        color: #f1f5f9;
    }
}

@media (max-width: 968px) {
    :root {
        --nav-height: 64px;
    }
}

@media (max-width: 480px) {
    :root {
        --nav-height: 56px;
    }

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

    .nav-logo {
        font-size: var(--text-lg);
    }
}

/* --------------------------------------------------------------------------
   Hero Section - Centralized Responsive Solution
   --------------------------------------------------------------------------
   Uses CSS Grid and clamp() for fluid, viewport-adaptive layout.
   Single source of truth for spacing - no overlap, no excessive gaps.
   -------------------------------------------------------------------------- */

/* Hero spacing tokens - adjust these to fine-tune across all viewports */
:root {
    /* Fluid vertical padding: scales from 1rem (mobile) to 3rem (desktop) */
    --hero-padding-y: clamp(1rem, 2vw + 0.5rem, 3rem);
    /* Fluid gap between elements */
    --hero-gap: clamp(1rem, 3vw, 2.5rem);
    /* Profile image size: scales fluidly - larger base for laptops/desktops */
    --hero-image-size: clamp(200px, 25vw + 80px, 420px);
}

.hero {
    /* Position below fixed navbar using margin-top (not padding) */
    margin-top: var(--nav-height);
    /* Fill remaining viewport height, but allow content to expand if needed */
    min-height: calc(100vh - var(--nav-height));
    min-height: calc(100svh - var(--nav-height));
    /* Use flexbox for vertical centering with controlled spacing */
    display: flex;
    align-items: center;
    justify-content: center;
    /* Symmetric vertical padding - content breathes equally */
    padding: var(--hero-padding-y) 0;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 100%;
    background: radial-gradient(circle, var(--color-primary-subtle) 0%, transparent 70%);
    z-index: -1;
}

.hero-content {
    display: grid;
    /* Two-column on large screens, single column on smaller */
    grid-template-columns: 1fr 1fr;
    gap: var(--hero-gap);
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    width: 100%;
    box-sizing: border-box;
}

.hero-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: clamp(0.25rem, 1vw, 0.75rem);
}

.hero-greeting {
    font-size: var(--text-lg);
    color: var(--color-primary);
    font-weight: 500;
    margin: 0;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    width: 100%;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw + 0.5rem, 1.5rem);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    margin: 0;
}

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

.cursor {
    animation: blink 1s infinite;
    margin-left: 2px;
}

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

.hero-description {
    font-size: clamp(0.95rem, 1vw + 0.5rem, 1.125rem);
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 540px;
    text-align: justify;
    text-align-last: left;
    margin: 0;
}

.hero-cta {
    display: flex;
    gap: clamp(0.4rem, 1.5vw, 1rem);
    flex-wrap: wrap;
    width: 100%;
    align-items: center;
    margin-top: clamp(0.5rem, 1.5vw, 1rem);
}

.hero-cta .btn {
    padding: clamp(0.4rem, 1vw, 0.6rem) clamp(0.6rem, 1.5vw, 1.2rem);
    font-size: clamp(0.65rem, 1vw + 0.2rem, 0.875rem);
    min-height: clamp(34px, 5vw, 42px);
    white-space: nowrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.hero-image-wrapper {
    position: relative;
    width: var(--hero-image-size);
    max-width: 100%;
    margin: 0 auto;
    display: block;
}

.hero-image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.hero-image-decoration {
    position: absolute;
    top: clamp(-8px, -1vw - 4px, -20px);
    right: clamp(-8px, -1vw - 4px, -20px);
    width: 100%;
    height: 100%;
    border: clamp(2px, 0.2vw + 1px, 3px) solid var(--color-primary);
    border-radius: var(--radius-xl);
    z-index: -1;
    pointer-events: none;
}

/* ========== Responsive Breakpoints ========== */

/* Tablet and below: single column, image on top */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-description {
        max-width: 100%;
        text-align: justify;
        text-align-last: center;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .hero-subtitle {
        justify-content: center;
    }
}

/* Small tablets and large phones */
@media (max-width: 768px) {
    .hero-content {
        padding: 0 var(--space-md);
    }

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

/* Mobile phones */
@media (max-width: 640px) {
    :root {
        --hero-image-size: clamp(120px, 35vw + 40px, 180px);
    }

    .hero-content {
        padding: 0 var(--space-md);
    }

    .hero-description {
        padding: 0;
    }

    .hero-cta {
        justify-content: center;
    }
}

/* Small mobile phones */
@media (max-width: 380px) {
    :root {
        --hero-image-size: clamp(100px, 30vw + 30px, 150px);
    }

    .hero-content {
        padding: 0 var(--space-sm);
    }

    .hero-image-decoration {
        display: none;
    }

    .hero-cta {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ========== Large Screens (27"+ monitors) ========== */
@media (min-width: 1600px) {
    :root {
        --hero-image-size: min(450px, 25vw);
        --hero-padding-y: clamp(2rem, 3vw, 4rem);
    }

    .hero {
        /* Don't let hero get excessively tall on large monitors */
        max-height: 900px;
    }

    .hero-content {
        max-width: 1400px;
    }
}

/* Laptop screens (14"-15" typical resolution range) */
@media (min-width: 1200px) and (max-width: 1599px) {
    :root {
        --hero-image-size: clamp(280px, 22vw + 60px, 380px);
    }
}

@media (min-width: 1920px) {
    .hero {
        max-height: 1000px;
    }

    .hero-content {
        max-width: 1500px;
        gap: var(--space-4xl);
    }
}

/* ========== Height-constrained viewports (laptops, small monitors) ========== */
@media (max-height: 700px) and (min-width: 768px) {
    :root {
        --hero-padding-y: 0.75rem;
        --hero-gap: 1rem;
        /* Keep image reasonably sized even on short screens */
        --hero-image-size: clamp(220px, 30vh + 50px, 320px);
    }

    .hero-text {
        gap: 0.25rem;
    }

    .hero-description {
        font-size: var(--text-sm);
        line-height: 1.5;
    }
}

@media (max-height: 600px) and (min-width: 768px) {
    :root {
        --hero-padding-y: 0.5rem;
        --hero-image-size: clamp(180px, 28vh + 40px, 280px);
    }

    .hero-description {
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section {
    padding: var(--space-3xl) 0;
}

@media (max-width: 640px) {
    .section {
        padding: var(--space-2xl) 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

@media (max-width: 640px) {
    .section-header {
        margin-bottom: var(--space-xl);
    }
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-primary-subtle);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

@media (max-width: 640px) {
    .section-title {
        font-size: var(--text-2xl);
    }
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-story {
    margin-bottom: var(--space-2xl);
}

.about-story p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

@media (min-width: 768px) {
    .about-story p {
        text-align: justify;
    }
}

.about-story .lead {
    color: var(--color-text);
    font-size: var(--text-xl);
    text-align: left;
}

.about-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.detail-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.detail-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.detail-card i {
    font-size: var(--text-xl);
    color: var(--color-primary);
    flex-shrink: 0;
}

.detail-card div {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.detail-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-weight: 500;
    color: var(--color-text);
    word-wrap: break-word;
}

.about-social {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.about-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    font-size: var(--text-xl);
    transition: all var(--transition-base);
}

.about-social a:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .about-content {
        padding: 0;
    }

    .about-story .lead {
        font-size: var(--text-lg);
    }
}

@media (max-width: 640px) {
    .about-details {
        grid-template-columns: 1fr;
    }

    .detail-card {
        padding: var(--space-md);
    }


    .about-social a {
        width: 44px;
        height: 44px;
    }
}

/* --------------------------------------------------------------------------
   Skills Section
   -------------------------------------------------------------------------- */
.skills {
    background: var(--color-bg-alt);
}

.skills-intro {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-2xl);
    text-align: center;
    padding: 0 var(--space-md);
}

.skills-intro p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.skill-category {
    background: var(--color-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.skill-category h3 i {
    color: var(--color-primary);
}

.skill-desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    font-style: italic;
    line-height: 1.5;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    background: var(--color-bg-alt);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: var(--color-primary);
    color: white;
}

.skill-tag.highlight {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.skill-tag.highlight:hover {
    background: var(--color-primary);
    color: white;
}

@media (max-width: 968px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .skills-intro {
        text-align: left;
    }

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

    .skill-category {
        padding: var(--space-md);
    }

    .skill-category h3 {
        font-size: var(--text-base);
    }

    .skill-tag {
        font-size: var(--text-xs);
        padding: 0.2rem var(--space-sm);
    }
}

/* --------------------------------------------------------------------------
   Journey Section (Timeline)
   -------------------------------------------------------------------------- */
.timeline {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-2xl);
    position: relative;
    padding: 0 var(--space-md);
}

.timeline::before {
    content: '';
    position: absolute;
    left: calc(var(--space-md) + 24px);
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    position: relative;
}

.timeline-marker {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-marker i {
    font-size: var(--text-xl);
    color: var(--color-text-muted);
}

.timeline-marker.current {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.timeline-marker.current i {
    color: white;
}

.timeline-content {
    flex: 1;
    padding-top: var(--space-sm);
    min-width: 0;
}

.timeline-date {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.timeline-content h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xs);
    word-wrap: break-word;
}

.timeline-company {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

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

@media (min-width: 768px) {
    .timeline-description p,
    .timeline-description li {
        text-align: justify;
    }
}

.timeline-description ul {
    margin-top: var(--space-sm);
    padding-left: var(--space-lg);
}

.timeline-description li {
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.timeline-description strong {
    color: var(--color-text);
}

.resume-download {
    text-align: center;
}

.resume-download p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
    .timeline {
        padding: 0;
    }

    .timeline::before {
        left: 24px;
    }
}

@media (max-width: 640px) {
    .timeline::before {
        left: 12px;
    }

    .timeline-item {
        gap: var(--space-md);
    }

    .timeline-marker {
        width: 26px;
        height: 26px;
    }

    .timeline-marker i {
        font-size: var(--text-sm);
    }

    .timeline-content h3 {
        font-size: var(--text-lg);
    }
}

/* --------------------------------------------------------------------------
   Projects Section
   -------------------------------------------------------------------------- */
.projects-intro {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-2xl);
    text-align: center;
    padding: 0 var(--space-md);
}

.projects-intro p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.project-card {
    background: var(--color-bg-alt);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.project-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--color-primary-subtle) 0%, var(--color-bg-alt) 100%);
}

.project-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    flex-shrink: 0;
}

.project-icon i {
    font-size: var(--text-2xl);
    color: white;
}

.project-card h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.project-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    flex: 1;
}

@media (min-width: 768px) {
    .project-card p {
        text-align: justify;
    }
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: auto;
}

.project-tags span {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-bg);
    border-radius: var(--radius-full);
}

.projects-cta {
    text-align: center;
    padding: 0 var(--space-md);
}

.projects-cta p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
    .projects-intro {
        text-align: left;
    }

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

    .project-card.featured {
        grid-column: span 1;
    }

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

    .project-icon {
        width: 48px;
        height: 48px;
        margin-bottom: var(--space-md);
    }

    .project-icon i {
        font-size: var(--text-xl);
    }

    .project-card h3 {
        font-size: var(--text-lg);
    }
}

/* --------------------------------------------------------------------------
   Recognition Section
   -------------------------------------------------------------------------- */
.recognition {
    background: var(--color-bg-alt);
}

.recognition-stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-md);
}

.stat-card {
    text-align: center;
    min-width: 120px;
}

.stat-number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    display: block;
}

.awards-highlight {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-2xl);
    padding: 0 var(--space-md);
}

.awards-highlight h3 {
    font-size: var(--text-xl);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.award-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.award-item:hover {
    transform: translateX(4px);
}

.award-item i {
    font-size: var(--text-xl);
    color: var(--color-primary);
    flex-shrink: 0;
}

.award-item span {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

@media (max-width: 768px) {
    .recognition-stats {
        flex-wrap: wrap;
        gap: var(--space-xl);
        justify-content: center;
    }

    .stat-card {
        flex: 0 0 calc(50% - var(--space-md));
    }

    .awards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .recognition-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .stat-card {
        flex: 0 0 100%;
    }

    .stat-number {
        font-size: var(--text-3xl);
    }

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

/* Testimonials */
.testimonials {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.testimonials h3 {
    font-size: var(--text-xl);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.testimonial-image-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.testimonial-image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.testimonial-image-card img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    .testimonials {
        padding: 0;
    }

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

.testimonials-slider {
    position: relative;
}

.testimonial-card {
    background: var(--color-bg);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.testimonial-card blockquote {
    font-size: var(--text-lg);
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    position: relative;
    padding-left: var(--space-xl);
}

.testimonial-card blockquote::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -10px;
    font-size: var(--text-4xl);
    color: var(--color-primary);
    font-family: Georgia, serif;
}

.author-name {
    font-weight: 600;
    color: var(--color-text);
}

.testimonial-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.testimonial-prev,
.testimonial-next {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    background: var(--color-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.testimonial-prev:hover,
.testimonial-next:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* --------------------------------------------------------------------------
   Gallery Section
   -------------------------------------------------------------------------- */
.gallery-intro {
    text-align: center;
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-xl);
    color: var(--color-text-secondary);
    padding: 0 var(--space-md);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-toggle {
    display: block;
    margin: var(--space-xl) auto 0;
}

.gallery-expanded {
    display: none;
    margin-top: var(--space-md);
}

.gallery-expanded.active {
    display: block;
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-sm);
    }
}

@media (max-width: 640px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
    }

    .gallery-intro {
        font-size: var(--text-sm);
        margin-bottom: var(--space-md);
        padding: 0;
        text-align: left;
    }

    .gallery-toggle {
        width: 100%;
        margin-top: var(--space-md);
    }
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact {
    background: var(--color-bg-dark);
    color: white;
}

.contact .section-tag {
    background: rgba(37, 99, 235, 0.2);
}

.contact .section-title {
    color: white;
}

.contact-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.contact-text {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.contact-text .lead {
    color: white;
    font-size: var(--text-xl);
}

.contact-text p {
    color: var(--color-text-muted);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    color: white;
}

.contact-card i {
    font-size: var(--text-2xl);
    color: var(--color-primary-light);
}

.contact-card div {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

@media (max-width: 640px) {
    .contact-methods {
        grid-template-columns: 1fr;
    }

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

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

    .contact-text .lead {
        font-size: var(--text-lg);
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-bg-dark);
    padding: var(--space-2xl) 0 var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-logo {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-primary-light);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-bottom: var(--space-xs);
}

.footer-seo {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

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

.footer-links a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: white;
}

.footer-bottom {
    padding-top: var(--space-xl);
    text-align: center;
}

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

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
        text-align: center;
    }

    .footer-brand {
        flex-direction: column;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .footer-links {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .footer-links a {
        padding: var(--space-sm) 0;
    }

    .footer-bottom p {
        font-size: var(--text-xs);
    }
}

/* --------------------------------------------------------------------------
   Back to Top Button
   -------------------------------------------------------------------------- */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

@media (max-width: 640px) {
    .back-to-top {
        bottom: var(--space-md);
        right: var(--space-md);
        width: 44px;
        height: 44px;
        font-size: var(--text-lg);
    }
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* --------------------------------------------------------------------------
   Animation Utilities
   -------------------------------------------------------------------------- */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Intersection Observer animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .nav,
    .back-to-top,
    .testimonial-nav,
    .gallery-toggle {
        display: none !important;
    }

    .section {
        padding: var(--space-xl) 0;
        page-break-inside: avoid;
    }
}

/* --------------------------------------------------------------------------
   Journey/Experience Section
   -------------------------------------------------------------------------- */
.journey {
    background: var(--color-bg);
}

/* --------------------------------------------------------------------------
   Education Section
   -------------------------------------------------------------------------- */
.education {
    background: var(--color-bg-alt);
}

.education .timeline {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

@media (min-width: 768px) {
    .education .timeline-description p {
        text-align: justify;
    }
}

/* --------------------------------------------------------------------------
   Journey Subsections
   -------------------------------------------------------------------------- */
.journey-subsection {
    margin-bottom: var(--space-2xl);
}

.subsection-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-primary);
}

.subsection-title i {
    color: var(--color-primary);
    font-size: var(--text-xl);
}

/* --------------------------------------------------------------------------
   Certifications Section
   -------------------------------------------------------------------------- */
.certifications {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-xl);
    text-align: center;
}

.certifications h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-lg);
}

.cert-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.cert-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition-base);
}

@media (max-width: 640px) {
    .cert-grid {
        flex-direction: column;
        align-items: stretch;
    }

    .cert-item {
        justify-content: center;
        text-align: center;
        border-radius: var(--radius-md);
    }
}

.cert-item:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.cert-item i {
    color: var(--color-primary);
    font-size: var(--text-lg);
}

.cert-item:hover i {
    color: white;
}

/* Contact Note */
.contact-note {
    text-align: center;
    margin-top: var(--space-xl);
}

.contact-note p {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

.contact-note i {
    color: var(--color-primary-light);
}