/* ===========================================
   PORTFOLIO - PHP & MAGENTO DEVELOPER
   Modern Dark Theme Single Page Application
   =========================================== */

/* CSS VARIABLES */
:root {
    /* Colors */
    --color-dark:       #1c1c1c;
    --color-dark-deep:  #111111;
    --color-dark-soft:  #2a2a2a;
    --color-light:      #f5f0eb;
    --color-light-bright: #ffffff;
    --color-muted:      rgba(245, 240, 235, 0.55);
    --color-muted-light: rgba(245, 240, 235, 0.75);
    --color-accent:     #f26322;
    --color-accent-dark: #d94f0a;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(28, 28, 28, 0) 0%, rgba(28, 28, 28, 0.8) 100%);

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

    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 2rem;      /* 32px */
    --font-size-4xl: 2.5rem;    /* 40px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-6xl: 4rem;      /* 64px */

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

    /* Layout */
    --max-width: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-accent: 0 0 20px rgba(242, 99, 34, 0.3);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* RESET & BASE STYLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-muted);
    background-color: var(--color-dark-deep);
    overflow-x: hidden;
}

/* Selection */
::selection {
    background-color: var(--color-accent);
    color: var(--color-dark-deep);
}

::-moz-selection {
    background-color: var(--color-accent);
    color: var(--color-dark-deep);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-dark);
    border-radius: var(--radius-md);
    border: 3px solid var(--color-dark-deep);
}

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

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-light-bright);
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-5xl);
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-3xl);
}

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

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

a:hover {
    color: var(--color-light-bright);
}

/* UTILITY CLASSES */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    min-height: 100vh;
    padding: var(--spacing-3xl) 0;
    display: flex;
    align-items: center;
}

.highlight {
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-weight: 500;
}

/* HEADER */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: transparent;
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    background-color: rgba(28, 28, 28, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-direction: row-reverse;
}

.nav__logo {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-light-bright);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition-fast);
}

.nav__logo:hover {
    color: var(--color-accent);
}

.logo__bracket {
    color: var(--color-accent);
    font-size: var(--font-size-3xl);
}

.logo__text {
    padding: 0 4px;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-muted-light);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.nav__link:hover {
    color: var(--color-accent);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__number {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: var(--font-size-xs);
}

.nav__toggle,
.nav__close {
    display: none;
}

/* HERO SECTION */
.hero {
    position: relative;
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    min-height: 100vh;
}

.hero__container {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.hero__content {
    flex: 1;
    max-width: 600px;
}

.hero__image {
    flex-shrink: 0;
    width: 380px;
}

.hero__image img {
    width: 100%;
    height: auto;
    display: block;
}

.hero__greeting {
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.6s ease-out;
}

.hero__title {
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero__name {
    display: block;
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--color-light-bright);
    margin-bottom: var(--spacing-sm);
}

.hero__subtitle {
    display: block;
    font-size: clamp(2rem, 7vw, 4rem);
    font-weight: 700;
    color: var(--color-muted);
}

.hero__description {
    max-width: 600px;
    font-size: var(--font-size-lg);
    color: var(--color-muted);
    margin: var(--spacing-xl) 0;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both;
    margin: var(--spacing-xl) 0;
}

.hero__tech {
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.tech__label {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-muted-light);
}

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

.tech__item {
    padding: 8px;
    background-color: rgba(242, 99, 34, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech__item img {
    width: 24px;
    height: 24px;
    display: block;
}

.tech__item:hover {
    background-color: rgba(242, 99, 34, 0.2);
    transform: translateY(-2px);
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.scroll__link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-muted);
    font-size: var(--font-size-sm);
    font-family: var(--font-mono);
}

.scroll__arrow {
    width: 2px;
    height: 40px;
    background: var(--gradient-primary);
    position: relative;
    animation: scrollAnimation 2s infinite;
}

.scroll__arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
    transform: translateX(-50%) rotate(45deg);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 14px 32px;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-accent);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

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

.btn--primary:hover {
    background-color: rgba(242, 99, 34, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-muted-light);
    border-color: var(--color-muted);
}

.btn--secondary:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background-color: rgba(242, 99, 34, 0.05);
    transform: translateY(-2px);
}

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

.btn--outline:hover {
    background-color: rgba(242, 99, 34, 0.1);
    transform: translateY(-2px);
}

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

/* SECTION HEADERS */
.section__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    white-space: nowrap;
}

.section__number {
    font-family: var(--font-mono);
    font-size: var(--font-size-xl);
    color: var(--color-accent);
}

.section__line {
    height: 1px;
    flex: 1;
    background-color: var(--color-dark-soft);
}

/* EXPERIENCE SECTION */
.experience {
    background-color: var(--color-dark);
}

.experience__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.experience__timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.timeline__item {
    position: relative;
    padding-left: var(--spacing-xl);
    opacity: 0;
    animation: fadeInLeft 0.6s ease-out forwards;
}

.timeline__item:nth-child(2) {
    animation-delay: 0.2s;
}

.timeline__marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 16px;
    height: 16px;
    background-color: var(--color-accent);
    border-radius: 50%;
    box-shadow: var(--shadow-accent);
}

.timeline__marker::before {
    content: '';
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-accent) 0%, transparent 100%);
}

.timeline__item:last-child .timeline__marker::before {
    display: none;
}

.timeline__content {
    background-color: var(--color-dark-soft);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(242, 99, 34, 0.1);
    transition: var(--transition-normal);
}

.timeline__content:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.timeline__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.timeline__title {
    font-size: var(--font-size-xl);
    color: var(--color-light-bright);
    margin-bottom: var(--spacing-xs);
}

.timeline__period {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    white-space: nowrap;
}

.timeline__company {
    color: var(--color-muted-light);
    margin-bottom: var(--spacing-md);
}

.timeline__tasks {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.timeline__tasks li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-muted);
    font-size: var(--font-size-sm);
}

.timeline__tasks li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: var(--font-size-lg);
}

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

.tech__badge {
    padding: 4px 12px;
    background-color: rgba(242, 99, 34, 0.1);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-accent);
}

/* SKILLS */
.experience__skills {
    opacity: 0;
    animation: fadeInRight 0.6s ease-out 0.3s forwards;
}

.skills__title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-light-bright);
}

.skills__grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.skill__category {
    background-color: var(--color-dark-soft);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(242, 99, 34, 0.1);
    transition: var(--transition-normal);
}

.skill__category:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.category__title {
    font-size: var(--font-size-lg);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
}

.skill__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skill__item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.skill__name {
    font-size: var(--font-size-sm);
    color: var(--color-light);
    font-weight: 500;
}

.skill__bar {
    height: 8px;
    background-color: var(--color-dark);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.skill__progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    transition: width 1s ease-out;
    animation: progressAnimation 1.5s ease-out;
}

/* PROJECTS SECTION */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.project__card {
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(242, 99, 34, 0.1);
    transition: var(--transition-normal);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.project__card:nth-child(2) {
    animation-delay: 0.1s;
}

.project__card:nth-child(3) {
    animation-delay: 0.2s;
}

.project__card:nth-child(4) {
    animation-delay: 0.3s;
}

.project__card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

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

.project__image {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--color-dark-soft) 0%, var(--color-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project__placeholder {
    width: 80px;
    height: 80px;
    color: var(--color-accent);
    opacity: 0.3;
}

.project__placeholder svg {
    width: 100%;
    height: 100%;
}

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

.project__label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project__title {
    font-size: var(--font-size-xl);
    color: var(--color-light-bright);
    margin: var(--spacing-sm) 0;
    transition: var(--transition-fast);
}

.project__card:hover .project__title {
    color: var(--color-accent);
}

.project__description {
    margin: var(--spacing-md) 0;
}

.project__description p {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    line-height: 1.6;
}

.project__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    list-style: none;
    margin: var(--spacing-md) 0;
}

.project__tech li {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-muted);
    padding: 4px 12px;
    background-color: rgba(242, 99, 34, 0.05);
    border-radius: var(--radius-sm);
}

.project__links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.project__link {
    color: var(--color-muted);
    transition: var(--transition-fast);
}

.project__link:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

.projects__more {
    text-align: center;
}

/* CONTACT SECTION */
.contact {
    background-color: var(--color-dark);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
}

.contact__info {
    opacity: 0;
    animation: fadeInLeft 0.6s ease-out forwards;
}

.contact__heading {
    font-size: var(--font-size-3xl);
    color: var(--color-light-bright);
    margin-bottom: var(--spacing-md);
}

.contact__text {
    font-size: var(--font-size-lg);
    color: var(--color-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact__detail {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact__detail svg {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 4px;
}

.detail__content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail__label {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    font-family: var(--font-mono);
}

.detail__value {
    font-size: var(--font-size-base);
    color: var(--color-light);
}

.contact__social {
    display: flex;
    gap: var(--spacing-md);
}

.social__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 2px solid var(--color-dark-soft);
    border-radius: var(--radius-md);
    color: var(--color-muted);
    transition: var(--transition-fast);
}

.social__link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background-color: rgba(242, 99, 34, 0.1);
    transform: translateY(-4px);
}

/* CONTACT FORM */
.contact__form {
    background-color: var(--color-dark-soft);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(242, 99, 34, 0.1);
    opacity: 0;
    animation: fadeInRight 0.6s ease-out forwards;
}

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

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-light);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-mono);
}

.form__input {
    width: 100%;
    padding: 14px 16px;
    background-color: var(--color-dark);
    border: 2px solid rgba(242, 99, 34, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-light);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.form__input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-accent);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* FOOTER */
.footer {
    background-color: var(--color-dark);
    border-top: 1px solid var(--color-dark-soft);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer__content .footer__links {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__logo {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-light-bright);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: var(--spacing-md);
}

.footer__description {
    color: var(--color-muted);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.footer__title {
    font-size: var(--font-size-base);
    color: var(--color-light-bright);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.footer__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    transition: var(--transition-fast);
    display: inline-block;
}

.footer__link:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-dark-soft);
}

.footer__copyright,
.footer__credits {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
}

.heart {
    color: #ff6b6b;
    animation: heartbeat 1.5s infinite;
}

/* SCROLL TO TOP */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--color-dark);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 999;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--color-accent);
    color: var(--color-dark-deep);
    transform: translateY(-4px);
    box-shadow: var(--shadow-accent);
}

/* ANIMATIONS */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scrollAnimation {
    0%, 100% {
        opacity: 1;
        transform: scaleY(1);
    }
    50% {
        opacity: 0.5;
        transform: scaleY(0.7);
    }
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(1.1);
    }
    20%, 40% {
        transform: scale(1);
    }
}

@keyframes progressAnimation {
    from {
        width: 0;
    }
}

/* RESPONSIVE DESIGN */
@media screen and (max-width: 968px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

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

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

    /* Mobile Navigation */
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background-color: var(--color-dark);
        padding: var(--spacing-3xl) var(--spacing-lg);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav__menu.show {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: flex-start;
    }

    .nav__link::after {
        display: none;
    }

    .nav__toggle,
    .nav__close {
        display: flex;
        color: var(--color-accent);
        cursor: pointer;
    }

    .nav__close {
        position: absolute;
        top: var(--spacing-lg);
        right: var(--spacing-lg);
    }

    /* Hero */
    .hero__container {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero__image {
        width: 260px;
        margin: 0 auto;
    }

    .hero__buttons {
        justify-content: center;
    }

    .tech__stack {
        justify-content: center;
    }

    /* Experience */
    .experience__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .timeline__item {
        padding-left: 0;
    }

    .timeline__marker {
        display: none;
    }

    /* Projects */
    .project--featured {
        grid-column: span 1;
    }

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

    /* Footer */
    .footer__content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }

    .footer__brand {
        grid-column: span 2;
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media screen and (max-width: 576px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --header-height: 60px;
    }

    .hero__image {
        width: 200px;
    }

    .hero__buttons {
        flex-direction: column;
    }

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

    .section__header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section__line {
        width: 100%;
    }

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

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

    .footer__brand {
        grid-column: span 1;
    }

    .timeline__header {
        flex-direction: column;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav__toggle,
    .scroll-top,
    .hero__scroll {
        display: none;
    }

    .section {
        page-break-inside: avoid;
    }
}