/* ── Header ── */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-h);
    background: transparent;
    transition: background var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out),
                backdrop-filter var(--duration-fast);
}

header.scrolled {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border);
}

header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    transition: opacity var(--duration-fast);
}

.nav-brand:hover {
    opacity: 0.7;
}

.accent-dot {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: color var(--duration-fast),
                background var(--duration-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
    background: var(--accent-subtle);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all var(--duration-fast);
}

.icon-btn:hover {
    color: var(--text);
    background: var(--accent-subtle);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: background var(--duration-fast);
}

.hamburger:hover {
    background: var(--accent-subtle);
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--duration-fast) var(--ease-out);
}

.hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero ── */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: orbFloat 20s infinite ease-in-out;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: var(--accent);
    top: -10%;
    right: -5%;
    opacity: 0.12;
    animation-duration: 25s;
}

.hero-orb-2 {
    width: 350px;
    height: 350px;
    background: #8b5cf6;
    bottom: 10%;
    left: -5%;
    opacity: 0.1;
    animation-duration: 20s;
    animation-delay: -5s;
}

.hero-orb-3 {
    width: 250px;
    height: 250px;
    background: #ec4899;
    top: 50%;
    left: 40%;
    opacity: 0.06;
    animation-duration: 15s;
    animation-delay: -10s;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    padding-top: calc(var(--header-h) + 40px);
    padding-bottom: 80px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--accent-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    min-height: 1.8em;
    font-family: var(--font-mono);
    font-weight: 400;
}

.cursor-blink {
    color: var(--accent);
    animation: blink 1s step-end infinite;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    margin-bottom: 32px;
    max-width: 480px;
}

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
    width: 100%;
    max-width: 320px;
}

.hero-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.hero-avatar-wrap {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 3px solid var(--border);
    transition: border-color var(--duration-fast);
}

.hero-card:hover .hero-avatar-wrap {
    border-color: var(--accent);
}

.hero-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-normal) var(--ease-out);
}

.hero-card:hover .hero-avatar {
    transform: scale(1.05);
}

.hero-card-name {
    display: block;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.hero-card-role {
    display: block;
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 16px;
}

.hero-card-socials {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--border);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--accent);
    animation: scrollDown 2s infinite;
}

/* ── Sections ── */

.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    margin-bottom: 64px;
}

.section-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* ── About ── */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.about-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.code-window {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

[data-theme="dark"] .code-window {
    background: #1a1a2e;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.code-dots {
    display: flex;
    gap: 6px;
}

.code-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.code-dots span:nth-child(1) { background: #ef4444; }
.code-dots span:nth-child(2) { background: #eab308; }
.code-dots span:nth-child(3) { background: #22c55e; }

.code-title {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

.code-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-secondary);
    overflow-x: auto;
}

.code-keyword { color: #c084fc; }
.code-var { color: #60a5fa; }
.code-prop { color: #f472b6; }
.code-string { color: #34d399; }

/* ── Skills ── */

.skills-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.skills-group-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.tech-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.tech-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: transform var(--duration-fast) var(--ease-spring);
}

.tech-item:hover .tech-icon {
    transform: scale(1.1);
}

.tech-detail {
    flex: 1;
}

.tech-name {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.tech-bar {
    height: 6px;
    background: var(--bg-subtle);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.tech-fill {
    height: 100%;
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.2s var(--ease-out);
}

.tech-percent {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    margin-left: auto;
    flex-shrink: 0;
}

.soft-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.soft-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--duration-fast) var(--ease-out);
}

.soft-item:hover {
    border-color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.soft-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 4px;
    font-family: var(--font-mono);
}

.soft-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ── Projects ── */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
}

.project-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.project-thumb {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    position: relative;
    background: var(--bg-subtle);
}

.project-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.project-card:hover .project-thumb img {
    transform: scale(1.06);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, rgba(0,0,0,0.6));
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding: 16px;
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-body {
    padding: 24px;
}

.project-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    font-family: var(--font-mono);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ── Contact ── */

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.contact-link-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--duration-fast);
}

.contact-link-item i {
    font-size: 1.2rem;
    color: var(--accent);
}

.contact-link-item:hover {
    color: var(--accent);
}

.contact-socials {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--duration-fast) var(--ease-out);
}

.social-icon:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-inverse);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.contact-form-wrap {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--duration-fast),
                box-shadow var(--duration-fast);
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

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

.form-status {
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    display: none;
    padding: 12px;
    border-radius: var(--radius-md);
}

.form-status.success {
    display: block;
    color: var(--success);
    background: rgba(34, 197, 94, 0.08);
}

.form-status.error {
    display: block;
    color: var(--error);
    background: rgba(239, 68, 68, 0.08);
}

/* ── Buttons ── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-inverse);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-primary:hover {
    box-shadow: 0 4px 20px var(--accent-glow);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--surface);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.8rem;
}

.btn-full {
    width: 100%;
}

.btn-loader {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.btn.loading .btn-text { opacity: 0; }
.btn.loading .btn-loader { display: inline-block; }

/* ── Footer ── */

footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    font-size: 1.2rem;
    font-weight: 800;
}

footer p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.footer-socials {
    display: flex;
    gap: 8px;
}

/* ── Responsive ── */

@media (max-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }

    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-cta { justify-content: center; }
    .hero-badge { margin-left: auto; margin-right: auto; }

    .about-grid,
    .skills-layout,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-stats { justify-content: center; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-elevated);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 32px 32px;
        gap: 8px;
        box-shadow: var(--shadow-xl);
        transition: right var(--duration-normal) var(--ease-out);
        z-index: 99;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 1rem;
        border-radius: var(--radius-md);
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

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

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

    .section {
        padding: 80px 0;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .scroll-indicator {
        display: none;
    }

    .contact-form-wrap {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .about-stats {
        flex-direction: column;
        gap: 16px;
        align-items: center;
        text-align: center;
    }

    .hero-card {
        padding: 24px;
    }

    .hero-avatar-wrap {
        width: 120px;
        height: 120px;
    }
}