/* ===== Variables ===== */
:root {
    --bg: #ffffff;
    --bg-elevated: #f7f7f7;
    --bg-card: #ffffff;
    --surface: #e8e8e8;
    --text: #0f0f0f;
    --text-muted: #666666;
    --accent: #0f0f0f;
    --accent-soft: rgba(15, 15, 15, 0.06);
    --accent-glow: rgba(15, 15, 15, 0.06);
    --border: rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Outfit', system-ui, sans-serif;
    --font-display: 'Syne', 'Outfit', sans-serif;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-h: 72px;
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    --card-shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
    --card-lift: -8px;
    --page-gutter: max(4vw, calc((100vw - min(1140px, 92vw)) / 2));
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    overflow-x: hidden;
}

::selection {
    background: var(--accent-soft);
    color: var(--text);
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: 3px;
}

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

a {
    color: inherit;
}

.container {
    width: min(1140px, 92vw);
    margin: 0 auto;
}

/* ===== Unified card hover ===== */
.hero-card,
.hero-stat,
.about-photo-frame,
.exp-card,
.service-item,
.project-card,
.contact-panel {
    box-shadow: var(--card-shadow);
    transition: transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition),
    opacity 0.5s ease;
}

.hero-card:hover,
.hero-stat:hover,
.about-photo-frame:hover,
.exp-card:hover,
.service-item.visible:hover,
.project-card.visible:hover {
    transform: translateY(var(--card-lift));
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(0, 0, 0, 0.14);
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
    transition: background var(--transition), border-color var(--transition);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.site-header .logo img {
    height: 60px;
    width: auto;
}

.nav-list {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-list a {
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    transition: color var(--transition);
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--text);
}

.nav-list a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: var(--transition);
}

/* ===== Sections ===== */
section {
    padding: clamp(5rem, 10vw, 7.5rem) 0;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.section-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 3rem;
}

.section-heading em {
    font-style: normal;
    color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.6rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-accent:hover {
    background: #333333;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== Hero ===== */
#home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-h);
    position: relative;
    overflow: hidden;
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    top: -10%;
    right: -5%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.04), transparent 70%);
    filter: blur(80px);
    opacity: 0.8;
    animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.08);
    }
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: min(1140px, 92vw);
    margin: 0 auto;
}

.hero-content {
    max-width: 560px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--accent-soft);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 1.5rem;
}

.hero-tag::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: blink-dot 2s infinite;
}

@keyframes blink-dot {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: 1rem;
}

.hero-title .highlight {
    color: var(--text-muted);
}

.hero-role {
    font-size: 1.15rem;
    color: var(--text-muted);
    min-height: 1.6em;
    margin-bottom: 2rem;
}

.hero-role .typed {
    color: var(--text);
    font-weight: 500;
}

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

@keyframes blink {
    50% {
        opacity: 0;
    }
}

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

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

.hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 380px;
    position: relative;
}

@keyframes hero-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-14px);
    }
}

.hero-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: calc(var(--radius) + 1px);
    z-index: -1;
    opacity: 0.6;
}

.hero-card img {
    width: 100%;
    border-radius: calc(var(--radius) - 4px);
    animation: hero-float 4s ease-in-out infinite;
}

.hero-stats-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.hero-stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    text-align: center;
}

.hero-stat strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--text);
}

.hero-stat span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-hint .line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform: scaleY(1);
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* ===== About ===== */
#about {
    background: var(--bg-elevated);
}

.about-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: start;
}

.about-photo {
    position: sticky;
    top: calc(var(--nav-h) + 2rem);
}

.about-photo-frame {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0rem;
    overflow: hidden;
}

.about-photo-frame img {
    border-radius: calc(var(--radius) - 6px);
    width: 100%;
}

.about-body p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.about-metrics {
    display: flex;
    gap: 2.5rem;
    margin: 2rem 0;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.metric-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ===== Experience ===== */
.experience-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.exp-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.exp-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.exp-item:last-child {
    border-bottom: none;
}

.exp-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.02em;
    padding-top: 0.25rem;
}

.exp-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
}

.exp-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.exp-company {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.exp-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-bottom: 0.35rem;
}

.exp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.exp-tags span {
    font-size: 0.72rem;
    padding: 0.3rem 0.75rem;
    background: var(--surface);
    border-radius: 100px;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

/* ===== Services ===== */
#services {
    background: var(--bg-elevated);
}

.services-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
}

.service-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-num {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(15, 15, 15, 0.08);
    line-height: 1;
    margin-bottom: 1rem;
}

.service-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 1.25rem;
    opacity: 0.75;
}

.service-item h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.service-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Projects ===== */
.projects-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1.5rem;
}

.projects-heading .section-label {
    margin-bottom: 0.75rem;
}

.projects-title {
    margin-bottom: 0;
}

.carousel-nav {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-bar button {
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-bar button.active,
.filter-bar button:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.projects-scroll-wrap {
    width: 100%;
    overflow: visible;
}

.projects-grid {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
    width: 100%;
    padding: 16px var(--page-gutter) 56px;
    scroll-padding-inline: var(--page-gutter);
}

.projects-grid::-webkit-scrollbar {
    display: none;
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition), border-color var(--transition), opacity var(--transition);
}

.carousel-btn:hover:not(:disabled) {
    background: var(--bg-elevated);
}

.carousel-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
    pointer-events: none;
}

.carousel-btn img {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

.project-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    opacity: 0;
    transform: scale(0.97);
    flex: 0 0 380px;
    scroll-snap-align: start;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition),
    opacity 0.4s ease;
}

.project-card.visible {
    opacity: 1;
    transform: scale(1);
}

.project-card.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    display: none;
}

.project-img {
    height: 180px;
    object-fit: fill;
    width: 100%;
    display: block;
    border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
}

.project-info {
    padding: 24px;
    font-family: var(--font);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-tag {
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
}

.project-info h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
    color: var(--text);
}

.project-info p {
    font-family: var(--font);
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
    margin-bottom: 16px;
}

.project-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: auto;
}

/* Shared icon links — projects & contact */
.project-link,
.social-row a {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    flex-shrink: 0;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.project-link img,
.social-row img {
    width: 18px;
    height: 18px;
    opacity: 0.7;
}

.project-link:hover,
.social-row a:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* ===== Contact ===== */
#contact {
    background: var(--bg-elevated);
}

.contact-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(2rem, 5vw, 3.5rem);
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow-hover);
    transition: none;
}

.contact-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.contact-intro h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.contact-intro p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.contact-row img {
    width: 20px;
    height: 20px;
    opacity: 0.65;
    flex-shrink: 0;
}

.social-row {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
}

.contact-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.contact-brand img {
    height: 80px;
    width: auto;
    opacity: 0.85;
}

.contact-brand p {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Footer ===== */
.site-footer {
    padding: 2rem 0;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

/* ===== Reveal ===== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: none;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-card {
        max-width: 280px;
        margin: 0 auto;
    }

    .about-layout {
        grid-template-columns: 1fr;
    }

    .about-photo {
        position: static;
        max-width: 280px;
        margin: 0 auto;
    }

    .services-row {
        grid-template-columns: 1fr;
    }

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

    .exp-item {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(280px, 80vw);
        height: 100vh;
        background: var(--bg-elevated);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        border-left: 1px solid var(--border);
        transition: right var(--transition);
    }

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

    .nav-toggle {
        display: flex;
    }

    .projects-top {
        align-items: center;
    }

    .project-card {
        flex: 0 0 100%;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
    }
}