* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

:root {
    --bg: #0d1117;
    --bg-alt: #161b22;
    --text: #e6edf3;
    --accent: #ff5d5d;
    --accent-gradient: linear-gradient(135deg, #ff5d5d, #ff9966 60%, #ffd479);
    --border: #30363d;
    --radius-sm: 4px;
    --radius: 10px;
    --shadow: 0 4px 16px -4px rgba(0, 0, 0, 0.4);
    --focus: 0 0 0 3px rgba(255, 93, 93, 0.4);
    --transition: 0.25s cubic-bezier(.4, .0, .2, 1);
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

a:hover,
a:focus {
    text-decoration: underline;
}

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

.container {
    width: min(1200px, 92%);
    margin: 0 auto;
}

/* Scroll animations */
[data-animate] {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

[data-animate="fade-up"] {
    transform: translateY(40px);
}

[data-animate="fade-up"].animated {
    animation: fadeUp 0.8s ease-out forwards;
}

[data-animate="slide-left"] {
    transform: translateX(60px);
}

[data-animate="slide-left"].animated {
    animation: slideLeft 0.8s ease-out forwards;
}

[data-animate="slide-right"] {
    transform: translateX(-60px);
}

[data-animate="slide-right"].animated {
    animation: slideRight 0.8s ease-out forwards;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

@keyframes slideLeft {
    from {
        opacity: 0;
        transform: translateX(60px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(-60px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.section {
    padding: clamp(3rem, 8vh, 5rem) 0;
}

.section h2 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    margin: 0 0 1.2rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% auto;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% center;
    }

    50% {
        background-position: 100% center;
    }
}

.site-header {
    position: sticky;
    top: 0;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 10;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .8rem 1.2rem;
}

.logo {
    font-weight: 700;
    letter-spacing: .5px;
    font-size: 1.1rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    padding: .4rem .7rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.nav-toggle:hover {
    background: var(--bg-alt);
    border-color: var(--accent);
}

.nav-toggle:focus-visible {
    outline: var(--focus);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 1.2rem;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    padding: .5rem .8rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-menu a:hover {
    background: var(--bg-alt);
}

.hero {
    position: relative;
    min-height: 72vh;
    display: grid;
    place-items: center;
    padding-top: 4rem;
}

.hero-inner {
    width: min(960px, 92%);
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 2px solid var(--border);
    box-shadow: 0 0 0 4px rgba(255, 93, 93, 0.1);
    margin: 0 0 1rem 0;
    animation: float 3s ease-in-out infinite;
    transition: transform 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 0 6px rgba(255, 93, 93, 0.2), 0 8px 24px rgba(255, 93, 93, 0.3);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }
}

.hero h1 {
    font-size: clamp(2.2rem, 6vw, 3.4rem);
    line-height: 1.1;
    margin: 0 0 1rem;
}

.accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.wave {
    width: 48px;
    height: 48px;
    vertical-align: middle;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {

    0%,
    100% {
        transform: rotate(0deg);
    }

    10%,
    30% {
        transform: rotate(14deg);
    }

    20% {
        transform: rotate(-8deg);
    }

    40%,
    100% {
        transform: rotate(0deg);
    }
}

.typing {
    min-height: 3.2rem;
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: .5px;
    display: flex;
    align-items: center;
}

.cta-group {
    display: flex;
    gap: 1rem;
    margin-top: 0;
}

.btn {
    display: inline-block;
    text-decoration: none;
    font-weight: 600;
    padding: .8rem 1.2rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--accent);
    position: relative;
    overflow: hidden;
}

.btn.primary {
    background: var(--accent-gradient);
    color: #0d1117;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn.primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn.primary:hover::before {
    opacity: 1;
}

.btn.primary:hover {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(255, 93, 93, 0.7);
    }

    50% {
        box-shadow: 0 0 0 10px rgba(255, 93, 93, 0);
    }
}

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

.btn.small {
    padding: .55rem .9rem;
    font-size: .85rem;
}

.btn:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px -6px rgba(255, 93, 93, 0.5);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    outline: var(--focus);
}

.skills-grid {
    display: grid;
    gap: 1.4rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.skill-block {
    background: var(--bg-alt);
    padding: 1.1rem 1rem .9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 93, 93, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.skill-block:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 24px -8px rgba(255, 93, 93, 0.3);
    border-color: var(--accent);
}

.skill-block:hover::before {
    opacity: 1;
}

.skill-block h3 {
    margin: 0 0 .6rem;
    font-size: 1.05rem;
    letter-spacing: .5px;
}

.skill-block ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
}

.skill-block li {
    background: #1f242c;
    padding: .35rem .55rem;
    border-radius: var(--radius-sm);
    font-size: .7rem;
    letter-spacing: .3px;
}

.project-card {
    background: var(--bg-alt);
    padding: 1.3rem 1.2rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    gap: .7rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(.4, .0, .2, 1);
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: left 0.6s;
}

.project-card:hover::after {
    left: 100%;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.6);
    border-color: var(--accent);
}

.project-card.highlight {
    border-color: var(--accent);
}

.project-card h3 {
    margin: 0;
    font-size: 1.15rem;
}

.project-card p {
    margin: 0;
    font-size: .9rem;
}

.tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    margin: 0;
    padding: 0;
}

.tags li {
    background: #1f242c;
    padding: .35rem .55rem;
    border-radius: var(--radius-sm);
    font-size: .65rem;
    letter-spacing: .3px;
}

.projects-grid {
    display: grid;
    gap: 1.4rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.loading-spinner {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem 1rem;
    color: var(--text);
    opacity: 0.7;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.quote blockquote,
blockquote {
    font-size: 1.1rem;
    font-style: italic;
    margin: 0;
}

.quote {
    background: radial-gradient(circle at top left, #181f28, #0d1117);
}

#quote-text {
    background: var(--bg-alt);
    padding: 1.2rem 1.1rem;
    border-left: 4px solid var(--accent);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stats-grid {
    display: grid;
    gap: 1.4rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.stats-grid img {
    width: 100%;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #0d1117;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stats-grid img:hover {
    transform: scale(1.05) rotate(1deg);
    box-shadow: 0 12px 24px -8px rgba(255, 93, 93, 0.4);
    border-color: var(--accent);
}

.contact-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: .9rem;
    padding: 0;
    margin: 0;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: var(--bg-alt);
    padding: .65rem .9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: .85rem;
    transition: var(--transition);
    text-decoration: none;
}

.contact-links a:hover {
    background: #1f242c;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.contact-links a:focus-visible {
    outline: var(--focus);
}

.contact-links svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.contact-links span {
    color: var(--text);
}

/* Hybrid contact label: hide text on small screens */
.contact-links .label {
    display: none;
}

@media (min-width: 821px) {
    .contact-links .label {
        display: inline-block;
        font-size: .78rem;
        letter-spacing: .3px;
    }
}

.site-footer {
    position: relative;
    background: #080c10;
    padding: 2.2rem 0 3.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border);
}

.site-footer p {
    margin: 0 0 .8rem;
    font-size: .75rem;
    letter-spacing: .5px;
    color: #94a3b8;
}

.back-to-top {
    position: fixed;
    right: 1.4rem;
    bottom: 1.4rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #0d1117;
    font-size: 1.4rem;
    font-weight: 700;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(255, 93, 93, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
    transition: all 0.3s cubic-bezier(.4, .0, .2, 1);
    cursor: pointer;
    z-index: 100;
    text-decoration: none;
}

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

.back-to-top:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 93, 93, 0.6);
}

.back-to-top:active {
    transform: scale(0.95);
}

/* Tooltip for back-to-top */
.back-to-top[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 60px;
    background: #161b22;
    color: var(--text);
    padding: .45rem .7rem;
    font-size: .65rem;
    letter-spacing: .5px;
    border: 1px solid var(--border);
    border-radius: 6px;
    white-space: nowrap;
    box-shadow: 0 6px 18px -6px rgba(0, 0, 0, .6);
    animation: tooltipFade .25s ease;
    pointer-events: none;
    z-index: 200;
}

@keyframes tooltipFade {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

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

.divider {
    display: none;
}

@media (max-width: 820px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        inset: 60px 0 auto 0;
        background: var(--bg-alt);
        flex-direction: column;
        padding: 1rem 1.2rem 1.6rem;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.5);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s cubic-bezier(.4, .0, .2, 1), opacity 0.3s, visibility 0s 0.3s;
        z-index: 9;
    }

    .nav-menu[data-open='true'] {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        transition: transform 0.3s cubic-bezier(.4, .0, .2, 1), opacity 0.3s;
    }

    .nav-menu a {
        padding: .8rem 1rem;
        border-bottom: 1px solid var(--border);
    }

    .nav-menu li:last-child a {
        border-bottom: none;
    }

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

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

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

    .hero {
        min-height: 68vh;
        padding-top: 2rem;
    }

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

    .avatar {
        margin: 0 auto 1rem;
    }

    .cta-group {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        text-align: center;
    }

    .wave {
        display: block;
        margin: .6rem auto 0;
    }

    .contact-links {
        flex-direction: row;
        justify-content: center;
        gap: 1.2rem;
    }

    .contact-links a {
        width: auto;
        padding: .6rem;
        background: transparent;
        border: none;
        box-shadow: none;
    }

    .contact-links a:hover {
        background: transparent;
        transform: scale(1.15);
        box-shadow: none;
    }

    .contact-links svg {
        width: 28px;
        height: 28px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

:focus-visible {
    outline: var(--focus);
}

@media (min-width: 821px) and (max-width: 1024px) {
    .container {
        width: 95%;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }
}

/* Scrollbars (WebKit) */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #0d1117;
}

::-webkit-scrollbar-thumb {
    background: #222b35;
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2f3944;
}