:root {
    --bg: #0b1220;
    --surface: #121b2f;
    --surface-soft: #18253f;
    --text: #e7ecf6;
    --muted: #b6c0d4;
    --primary: #4f8cff;
    --primary-dark: #3b6fd0;
    --accent: #22d3ee;
    --success: #22c55e;
    --danger: #f87171;
    --radius: 14px;
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", Arial, sans-serif;
    background: linear-gradient(180deg, #09101d 0%, #0f1829 40%, #0b1220 100%);
    color: var(--text);
    line-height: 1.6;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    color: #7be7f7;
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

.section {
    padding: 5rem 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(11, 18, 32, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text);
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: var(--shadow);
}

.brand-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.28);
    box-shadow: var(--shadow);
}

.brand-text {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.nav-toggle {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    width: 44px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    display: grid;
    place-items: center;
    gap: 4px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-menu {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    background: var(--surface);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.75rem 1rem;
}

.nav-menu a {
    padding: 0.65rem 0.8rem;
    border-radius: 8px;
    color: var(--text);
    font-weight: 500;
}

.nav-menu a:hover {
    background: var(--surface-soft);
    color: white;
}

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

.hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.2rem;
    align-items: center;
    padding-top: 6rem;
}

.hero-intro {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 1rem;
}

h1 {
    font-size: clamp(1.9rem, 5vw, 3rem);
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
}

.hero-text {
    color: var(--muted);
    max-width: 58ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.2rem;
}

.btn {
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6a9dff);
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 10px 25px rgba(79, 140, 255, 0.35);
}

.btn-secondary {
    background: #24334f;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.btn-secondary:hover {
    background: #2a3b5f;
}

.hero-image-wrap {
    justify-self: center;
}

.hero-image {
    width: min(360px, 80vw);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, filter 0.25s ease;
}

.hero-image:hover {
    transform: translateY(-6px) scale(1.01);
    filter: brightness(1.05);
}

.about {
    background: rgba(255, 255, 255, 0.02);
}

.about-grid,
.contact-grid,
.projects-grid {
    display: grid;
    gap: 1rem;
}

.card,
.contact-card,
.project-card,
.contact-form {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    padding: 1rem;
}

.card:hover,
.project-card:hover,
.contact-card:hover {
    border-color: rgba(79, 140, 255, 0.6);
    box-shadow: var(--shadow);
}

.info-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.info-list li {
    margin-bottom: 0.45rem;
    color: var(--muted);
}

.skills-grid {
    display: grid;
    gap: 1rem;
}

.skill-item span {
    display: inline-block;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.progress {
    height: 10px;
    width: 100%;
    border-radius: 999px;
    background: #26334f;
    overflow: hidden;
}

.progress > div {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 999px;
    transition: width 1s ease;
}

.skill-item.visible .progress > div {
    width: var(--skill-width);
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.project-card h3 {
    margin-bottom: 0.35rem;
}

.project-card p {
    margin-top: 0;
    color: var(--muted);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.project-tags span {
    background: #22324e;
    color: #d5e2fa;
    border-radius: 999px;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
}

.project-link {
    display: inline-block;
    margin-top: 0.75rem;
    font-weight: 600;
}

.contact-form label {
    display: block;
    font-size: 0.9rem;
    margin: 0.35rem 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: #0f1729;
    color: var(--text);
    padding: 0.75rem;
    font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.18);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.error {
    display: block;
    min-height: 18px;
    color: var(--danger);
    font-size: 0.82rem;
}

.form-status {
    min-height: 22px;
    margin-top: 0.55rem;
    color: var(--success);
    font-weight: 500;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.social-links a {
    display: inline-block;
    background: #22324e;
    color: #eaf1ff;
    border-radius: 999px;
    padding: 0.45rem 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    background: #2d4370;
    transform: translateY(-2px);
}

.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 1.5rem;
}

.footer-inner {
    padding: 2rem 0;
    text-align: center;
    color: var(--muted);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 0.7rem;
}

.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

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

@media (max-width: 991px) {
    .project-card,
    .card,
    .contact-form,
    .contact-card {
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .project-card:hover,
    .card:hover,
    .contact-card:hover {
        transform: translateY(-4px);
    }
}