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

:root {
    --bg: #f8fafc;
    --bg-alt: #f1f5f9;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #2563eb;
    --accent-light: #eff6ff;
    --accent-hover: #1d4ed8;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 10px 30px rgba(0, 0, 0, 0.08);
    --nav-h: 68px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Typography ===== */
h1,
h2,
h3 {
    line-height: 1.2;
    font-weight: 700;
}

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

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.9rem;
    font-family: 'Inter', sans-serif;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

/* ===== NAV ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 100;
    transition: all 0.3s ease;
    background: transparent;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.nav-logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 28px;
    margin-left: auto;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

/* Lang toggle */
.lang-toggle {
    background: none;
    border: 1.5px solid var(--border);
    border-radius: 100px;
    padding: 6px 14px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    gap: 6px;
    align-items: center;
    transition: all 0.2s;
}

.lang-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lang-active {
    color: var(--accent);
}

.lang-sep {
    color: var(--border);
}

.lang-inactive {
    color: var(--text-muted);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

/* Mobile menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
}

.mobile-menu a {
    padding: 12px 0;
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
}

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

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    padding-top: var(--nav-h);
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Subtle grid background */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: 0.4;
    z-index: 0;
}

/* Gradient fade overlay */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(transparent, var(--bg));
    z-index: 1;
}

.hero-grid {
    position: relative;
    z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 24px;
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 100px;
    background: #dcfce7;
    color: #166534;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #22c55e;
    animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.3);
    }
}

.hero-greeting {
    display: block;
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.hero-name {
    display: block;
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    line-height: 1.1;
}

.hero-role {
    margin-top: 12px;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--accent);
}

.hero-tagline {
    margin-top: 16px;
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 520px;
    line-height: 1.7;
}

.hero-cta {
    margin-top: 32px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-stats {
    margin-top: 48px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Hero Photo */
.hero-photo-wrap {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-photo-ring {
    width: 340px;
    height: 340px;
    border-radius: 40% 60% 55% 45% / 50% 45% 55% 50%;
    background: linear-gradient(135deg, var(--accent) 0%, #818cf8 100%);
    padding: 5px;
    animation: morphBlob 8s ease-in-out infinite;
}

@keyframes morphBlob {

    0%,
    100% {
        border-radius: 40% 60% 55% 45% / 50% 45% 55% 50%;
    }

    33% {
        border-radius: 55% 45% 40% 60% / 45% 55% 45% 55%;
    }

    66% {
        border-radius: 45% 55% 60% 40% / 55% 40% 60% 45%;
    }
}

.hero-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
    display: block;
}

/* Floating badges */
.photo-float-badge {
    position: absolute;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text);
    box-shadow: var(--shadow);
    white-space: nowrap;
    animation: floatBadge 3s ease-in-out infinite;
}

.photo-float-badge.top-left {
    top: 16px;
    left: -20px;
    animation-delay: 0s;
}

.photo-float-badge.bottom-right {
    bottom: 20px;
    right: -16px;
    animation-delay: 1.5s;
}

@keyframes floatBadge {

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

    50% {
        transform: translateY(-8px);
    }
}

/* Hero scroll hint */
.hero-scroll-hint {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-bottom: 32px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
    animation: arrowBounce 1.4s ease infinite;
    margin-top: -4px;
}

@keyframes arrowBounce {

    0%,
    100% {
        transform: rotate(45deg) translate(0, 0);
        opacity: 1;
    }

    50% {
        transform: rotate(45deg) translate(4px, 4px);
        opacity: 0.5;
    }
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section.about {
    background: var(--surface);
}

.section.skills {
    background: var(--bg-alt);
}

.section.contact {
    background: var(--surface);
}

.section-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 48px;
}

/* ===== ABOUT ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 80px;
    align-items: start;
}

.about-text h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 24px;
}

.about-text p {
    margin-bottom: 16px;
    line-height: 1.8;
    font-size: 0.975rem;
}

.industries-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.industry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.industry-tags span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text);
}

.languages-box {
    margin-top: 8px;
}

.lang-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.lang-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.flag {
    font-size: 1.4rem;
}

.lang-item div {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.lang-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
}

.lang-level {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== SKILLS ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all 0.25s ease;
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.2);
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: 14px;
    line-height: 1;
}

.skill-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.skill-card p {
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tags span {
    padding: 3px 10px;
    background: var(--accent-light);
    color: var(--accent);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 600;
}

/* ===== CONTACT ===== */
.contact-sub {
    max-width: 560px;
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 48px;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s ease;
}

.contact-card:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 1.8rem;
}

.contact-card-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 3px;
}

.contact-card-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--text);
    color: rgba(255, 255, 255, 0.5);
    padding: 24px 0;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.15s;
}

.delay-2 {
    transition-delay: 0.3s;
}

.delay-3 {
    transition-delay: 0.45s;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 80px 24px 40px;
    }

    .hero-photo-wrap {
        order: -1;
    }

    .hero-photo-ring {
        width: 240px;
        height: 240px;
    }

    .hero-badge,
    .hero-cta,
    .hero-stats {
        justify-content: center;
    }

    .hero-tagline {
        margin: 16px auto;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .hamburger {
        display: flex;
    }
}

@media (max-width: 560px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }

    .footer .container {
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }

    .section {
        padding: 72px 0;
    }
}