:root {
    --bg: #f6f8fb;
    --text: #102030;
    --muted: #5b6b7a;

    --accent-1: #3EE6B4;
    --accent-2: #2BB673;
    --accent-3: #3A8DFF;
    --accent-glow: rgba(62,230,180,0.12);
    --card-bg: #ffffff;
    --nav-bg-gradient: linear-gradient(135deg, rgba(62,230,180,0.10), rgba(43,182,115,0.06));
    --footer-bg: linear-gradient(180deg, #0b1a2b 0%, #071125 100%);

    --hero-text: var(--text);
    --shadow: rgba(16,32,48,0.06);
    --glass: rgba(255,255,255,0.65);
}

[data-theme="dark"] {
    --bg: #070710;
    --text: #dbe9ff;
    --muted: #9fb4d1;

    --accent-1: #44eeb8;
    --accent-2: #2fd07a;
    --accent-3: #4aa2ff;
    --accent-glow: rgba(62,230,180,0.18);
    --card-bg: rgba(255,255,255,0.02);
    --nav-bg-gradient: linear-gradient(135deg, rgba(62,230,180,0.05), rgba(47,208,122,0.04));
    --footer-bg: linear-gradient(180deg, #030418 0%, #02030a 100%);

    --hero-text: #eaf6ff;
    --shadow: rgba(0,0,0,0.6);
    --glass: rgba(255,255,255,0.03);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    transition: background-color 0.35s ease, color 0.35s ease;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
}

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

nav {
    background: var(--nav-bg-gradient);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 6px 30px var(--shadow);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid rgba(255,255,255,0.03);
    transition: background 0.35s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    color: var(--accent-1);
    font-size: 1.2rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-shadow: 0 6px 18px var(--accent-glow);
    align-self: center;
}

.logo img {
    display: block;
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
}

.logo .brand-name {
    font-size: 1rem;
    color: inherit;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    padding: 6px 10px;
    border-radius: 8px;
    transition: transform 0.15s ease, background 0.2s ease;
}

.nav-links a:hover {
    transform: translateY(-2px);
    background: linear-gradient(90deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
}

.hamburger { display: none; flex-direction: column; cursor: pointer; }
.hamburger span { width: 25px; height: 3px; background: currentColor; margin: 3px 0; transition: 0.3s; color: var(--text); }

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 6px 8px;
    border-radius: 8px;
    transition: background-color 0.2s ease, transform 0.15s ease;
}

.theme-toggle:hover { transform: translateY(-2px); background: rgba(255,255,255,0.03); }

.hero {
    background: linear-gradient(120deg, rgba(62,230,180,0.15), rgba(43,182,115,0.12));
    color: var(--hero-text);
    padding: 150px 2rem 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before,
.hero::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.9;
    mix-blend-mode: screen;
    transform: translate3d(0,0,0);
}

.hero::before {
    width: 520px;
    height: 520px;
    left: -140px;
    top: -120px;
    background: radial-gradient(circle at 30% 30%, var(--accent-1), transparent 40%), radial-gradient(circle at 70% 70%, var(--accent-3), transparent 30%);
    animation: float 8s ease-in-out infinite;
}

.hero::after {
    width: 420px;
    height: 420px;
    right: -100px;
    bottom: -100px;
    background: radial-gradient(circle at 50% 40%, var(--accent-2), transparent 45%), radial-gradient(circle at 20% 80%, var(--accent-3), transparent 30%);
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-18px) scale(1.03); }
    100% { transform: translateY(0) scale(1); }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.9s both;
    letter-spacing: -0.5px;
    text-shadow: 0 10px 30px rgba(10,20,30,0.08);
}

.typing {
    display: inline-block;
    white-space: nowrap;
    overflow: hidden;
    vertical-align: bottom;
    border-right: .12em solid var(--accent-2);
    padding-right: 2px;
    font-family: inherit;
    line-height: 1;
}

@keyframes caret-blink {
    50% { border-color: transparent; }
}

.caret-blink {
    animation: caret-blink 700ms steps(1) infinite;
}

.hero p.hero-role {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--hero-text);
    animation: fadeInUp 0.9s 0.2s both;
    min-height: 1.4rem;
    opacity: 0.95;
}
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
    color: white;
    text-decoration: none;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.25s, box-shadow 0.25s;
    box-shadow: 0 10px 30px var(--accent-glow);
    border: 1px solid rgba(255,255,255,0.06);
}
.btn:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 18px 60px var(--accent-glow);
}
.about { padding: 80px 2rem; max-width: 1200px; margin: 0 auto; }
.about-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.profile-img {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    overflow: visible;
    display: block;
    margin: 0;
    perspective: 1200px;
    -webkit-perspective: 1200px;
}

.profile-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow);
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    transform-style: preserve-3d;
    transition: transform 450ms cubic-bezier(.2,.9,.2,1), box-shadow 450ms cubic-bezier(.2,.9,.2,1);
    will-change: transform;
    position: relative;
}

.profile-inner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: translateZ(0.02px);
}

.profile-shine {
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    mix-blend-mode: overlay;
    background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(255,255,255,0.28) 0%, rgba(255,255,255,0.08) 10%, rgba(255,255,255,0.02) 25%, transparent 45%);
    transition: background 120ms linear, opacity 250ms;
    opacity: 0.95;
}

.profile-img.is-tilting .profile-inner {
    box-shadow: 0 30px 70px rgba(10,20,30,0.45);
}

@media (prefers-reduced-motion: reduce) {
    .profile-inner { transition: transform 200ms ease; }
    .profile-shine { transition: none; }
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-2);
    text-shadow: 0 8px 28px rgba(43,182,115,0.06);
}
.about-text p { font-size: 1.1rem; color: var(--muted); margin-bottom: 1rem; }
.skills { background: var(--bg); padding: 80px 2rem; }
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--accent-2);
}
.skills-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}
.skill-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.5));
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 8px 30px var(--shadow);
    text-align: center;
    transition: transform 0.3s, background 0.3s, color 0.3s;
    border: 1px solid rgba(255,255,255,0.35);
    backdrop-filter: blur(6px);
}

[data-theme="dark"] .skill-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border: 1px solid rgba(255,255,255,0.03);
}
.skill-card:hover { transform: translateY(-10px); }
.skill-card i {
    font-size: 3rem;
    color: var(--accent-2);
    margin-bottom: 1rem;
    text-shadow: 0 6px 28px var(--accent-glow);
}
.skill-card h3 { margin-bottom: 0.5rem; }

.projects { padding: 80px 2rem; max-width: 1200px; margin: 0 auto; color: var(--text); }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(0,0,0,0.04);
    display: block;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
}

.project-card:focus-visible {
    outline: 3px solid rgba(58,141,255,0.18);
    outline-offset: 4px;
}

[data-theme="dark"] .project-card { border: 1px solid rgba(255,255,255,0.03); }

.project-card:hover { transform: translateY(-10px); box-shadow: 0 20px 60px rgba(10,20,30,0.25); }

.project-img {
    width: 100%;
    height: 200px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.project-info { padding: 1.5rem; }

.project-info h3 { margin-bottom: 0.5rem; color: var(--accent-2); }

.testimonials { background: var(--bg); padding: 80px 2rem; color: var(--text); }

.testimonials-container { max-width: 1200px; margin: 0 auto; }

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 30px var(--shadow);
    transition: transform 0.25s;
    border: 1px solid rgba(0,0,0,0.04);
}

[data-theme="dark"] .testimonial-card { border: 1px solid rgba(255,255,255,0.03); }

.testimonial-card i { color: var(--accent-1); font-size: 2rem; margin-bottom: 1rem; text-shadow: 0 6px 18px var(--accent-glow); }

.testimonial-text { font-style: italic; margin-bottom: 1rem; color: var(--muted); }

.testimonial-author { font-weight: bold; color: var(--text); }
.testimonial-role { color: var(--muted); font-size: 0.9rem; }

.cta {
    background: linear-gradient(90deg, var(--accent-2), var(--accent-3));
    color: white;
    padding: 80px 2rem;
    text-align: center;
    border-radius: 8px;
    margin: 40px 2rem;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}

.cta h2 { font-size: 2.5rem; margin-bottom: 1rem; text-shadow: 0 12px 30px rgba(10,10,20,0.12); }
.cta p { font-size: 1.2rem; margin-bottom: 2rem; }

.cta .btn { background: rgba(255,255,255,0.95); color: var(--accent-2); box-shadow: 0 12px 40px rgba(0,0,0,0.08); }

footer {
    background: var(--footer-bg);
    color: white;
    padding: 3rem 2rem 1rem;
    transition: background-color 0.3s;
    margin-top: 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 { margin-bottom: 1rem; color: rgba(255,255,255,0.95); }
.social-links { display: flex; gap: 1rem; margin-top: 1rem; }
.social-links a { color: white; font-size: 1.5rem; transition: color 0.25s, transform 0.15s; }
.social-links a:hover { color: var(--accent-1); transform: translateY(-4px); }

.footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.04); }

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

.role-fade {
    display: inline-block;
    opacity: 0;
    transform: translateY(8px);
    animation: fadeUpIn 0.6s forwards;
}

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

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(2,6,23,0.55);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1.25rem;
}
.modal-backdrop.show { display: flex; }

.modal {
    width: 100%;
    max-width: 760px;
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.04);
}

[data-theme="light"] .modal {
    background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(255,255,255,0.94));
    color: var(--text);
    border: 1px solid rgba(0,0,0,0.06);
}

[data-theme="dark"] .modal {
    background: #0b1220;
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 20px 80px rgba(0,0,0,0.85);
}

[data-theme="dark"] .modal input,
[data-theme="dark"] .modal textarea {
    background: #0f1624;
    border: 1px solid rgba(255,255,255,0.06);
    color: var(--text);
}

.modal h3 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--accent-2);
}
.modal p.lead { color: var(--muted); margin-bottom: 1rem; }

.modal .grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.modal label { display: block; font-size: 0.9rem; margin-bottom: 0.25rem; color: var(--muted); }
.modal input[type="text"],
.modal input[type="email"],
.modal input[type="tel"],
.modal textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid rgba(0,0,0,0.06);
    background: transparent;
    color: inherit;
    resize: vertical;
}

[data-theme="light"] .modal input,
[data-theme="light"] .modal textarea {
    border: 1px solid rgba(10,20,30,0.06);
}

.modal textarea {
    min-height: 140px;
    font-family: inherit;
    line-height: 1.4;
}

.modal .actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.btn-ghost {
    background: transparent;
    color: var(--muted);
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.04);
}

.btn-primary {
    background: linear-gradient(90deg, #3EE6B4, #2BB673);
    color: white;
    padding: 10px 16px;
    border-radius: 10px;
    border: none;
    font-weight: 700;
}

.field-error {
    color: #3A8DFF;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

@media (max-width: 720px) {
    .modal .grid { grid-template-columns: 1fr; }
    .profile-img { max-width: 220px; height: 220px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        gap: 1rem;
        z-index: 1200;
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
    }
    .nav-links.active { left: 0; }

    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .about-container { grid-template-columns: 1fr; text-align: center; }
    .profile-img { margin: 0 auto; }

    .about-text h2 { font-size: 2rem; }
    .section-title { font-size: 2rem; }
    .skills-container { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .testimonial-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .social-links { justify-content: center; }
}

@media (max-width: 480px) {
    .nav-container { padding: 0 1rem; }
    .logo { font-size: 1.25rem; }
}