/* ============================================
   MAOU — Portfolio
   Monochrome Glass · Rectangular · Single File
   ============================================ */

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

:root {
    --color-bg: #fafafa;
    --color-text: #0a0a0a;
    --color-text-light: #6b6b6b;
    --color-border: #d9d9d9;
    --color-card: #ffffff;
    --color-noise: rgba(0, 0, 0, 0.025);

    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.78);
    --glass-border: rgba(10, 10, 10, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    --glass-blur: 14px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-heading: 'Poppins', var(--font-sans);

    --container-width: 1200px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
    --color-bg: #0a0a0a;
    --color-text: #f5f5f5;
    --color-text-light: #9a9a9a;
    --color-border: #2a2a2a;
    --color-card: #141414;
    --color-noise: rgba(255, 255, 255, 0.025);

    --glass-bg: rgba(20, 20, 20, 0.55);
    --glass-bg-strong: rgba(10, 10, 10, 0.78);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: auto;
}

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

:focus-visible { outline: 2px solid var(--color-text); outline-offset: 3px; }

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3rem); }
h3 { font-size: 1.5rem; font-weight: 500; }
p  { margin-bottom: 1.5rem; max-width: 65ch; }

.section-title {
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 1rem;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 1rem;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.nav-logo-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 0;
    padding: 0.5rem 1.25rem;
    box-shadow: var(--glass-shadow);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.nav.scrolled .nav-logo-glass,
.nav.scrolled .nav-links-glass {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-text { transition: transform var(--transition); }
.nav-logo:hover .logo-text { transform: scale(1.05); }

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 0;
    padding: 0.5rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    box-shadow: var(--glass-shadow);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.nav-links { display: flex; gap: var(--spacing-md); }

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-text);
    transition: width var(--transition);
}

.nav-link:hover::after { width: 100%; }

.theme-toggle {
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 0;
    padding: 0.5rem;
    color: var(--color-text);
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    cursor: pointer;
}

.theme-toggle:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
    transform: rotate(15deg);
}

.theme-icon { position: absolute; transition: opacity 0.3s ease, transform 0.3s ease; }
.theme-icon.sun { opacity: 1; transform: scale(1); }
.theme-icon.moon { opacity: 0; transform: scale(0.8); }
[data-theme="dark"] .theme-icon.sun { opacity: 0; transform: scale(0.8); }
[data-theme="dark"] .theme-icon.moon { opacity: 1; transform: scale(1); }

.nav-progress {
    position: fixed;
    bottom: 0;
    left: 0;
    height: 2px;
    background: var(--color-text);
    width: 0%;
    transition: width 0.1s ease;
    z-index: 1001;
}

.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 0;
    width: 44px;
    height: 44px;
    color: var(--color-text);
    transition: all 0.3s ease;
    cursor: pointer;
}

.mobile-menu-btn i { font-size: 24px; }

.mobile-menu-btn:hover {
    background: var(--color-text);
    color: var(--color-bg);
    transform: scale(1.05);
}

/* ============================================
   MOBILE SIDEBAR
   ============================================ */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    z-index: 2000;
    transition: left 0.4s var(--ease);
    padding: 80px 20px 20px;
    box-shadow: 5px 0 30px rgba(0, 0, 0, 0.1);
}

.mobile-sidebar.active { left: 0; }

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 30px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
}

.sidebar-header i { font-size: 28px; color: var(--color-text); }
.sidebar-header h2 { font-size: 1.5rem; font-weight: 600; margin: 0; }

.sidebar-nav-links { list-style: none; }
.sidebar-nav-links li { margin-bottom: 8px; }

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--color-text);
    text-decoration: none;
    padding: 12px 15px;
    border-radius: 0;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
}

.sidebar-link i { font-size: 22px; }

.sidebar-link:hover,
.sidebar-link:active {
    background: var(--glass-border);
    transform: translateX(5px);
}

.sidebar-theme-toggle {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 100%;
    background: transparent;
    border: none;
    color: var(--color-text);
    padding: 12px 15px;
    border-radius: 0;
    font-size: 1rem;
    font-weight: 500;
    margin-top: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.sidebar-theme-toggle i { font-size: 22px; }

.sidebar-theme-toggle:hover,
.sidebar-theme-toggle:active {
    background: var(--glass-border);
    transform: translateX(5px);
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active { opacity: 1; visibility: visible; }

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 0 var(--spacing-sm);
    overflow: hidden;
}

.hero-noise {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.6;
    background-color: var(--color-noise);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

.hero-content { text-align: center; max-width: 900px; position: relative; z-index: 1; }
.hero-name { margin-bottom: 1rem; letter-spacing: -0.03em; }

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    min-height: 2rem;
}

.typing-text { display: inline-block; }

.cursor {
    display: inline-block;
    animation: blink 1s infinite;
    color: var(--color-text);
}

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

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background-color: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    border-radius: 0;
    border: 1px solid var(--color-text);
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.7s;
}

.cta-button:hover::before { left: 100%; }

.cta-button:hover {
    background-color: transparent;
    color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.scroll-hint {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    transition: opacity 0.6s ease;
}

.scroll-hint.hidden { opacity: 0; }

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-text), transparent);
    animation: scrollLine 2.5s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(0.4); opacity: 0.3; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* ============================================
   MARQUEE STRIP
   ============================================ */
.marquee-section {
    width: 100%;
    overflow: hidden;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 0.85rem 0;
    background: var(--color-bg);
    position: relative;
    z-index: 1;
}

.marquee-track {
    display: flex;
    width: max-content;
    animation: marqueeScroll 28s linear infinite;
    will-change: transform;
}

.marquee-section:hover .marquee-track { animation-play-state: paused; }

.marquee-content {
    white-space: nowrap;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-light);
    padding-right: 0;
}

@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ============================================
   ABOUT
   ============================================ */
.about {
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: var(--container-width);
    margin: 0 auto;
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-content p { margin-bottom: 1.5rem; font-size: 1.125rem; }

.about-intro {
    font-size: 1.5rem !important;
    font-weight: 500;
    margin-bottom: 2rem !important;
}

.image-frame {
    position: relative;
    padding-top: 125%;
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 0;
    overflow: hidden;
    transition: background-color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.image-frame:hover { box-shadow: var(--glass-shadow); }

.profile-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.6s var(--ease), transform 0.6s var(--ease);
}

.image-frame:hover .profile-image {
    filter: grayscale(0%);
    transform: scale(1.05);
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats-section {
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stats-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
}

.stat-divider {
    width: 1px;
    height: 80px;
    background: var(--color-border);
    align-self: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    gap: 0.5rem;
    transition: background 0.3s ease;
}

.stat-item:hover { background: var(--glass-bg); }

.stat-num-wrap {
    display: flex;
    align-items: baseline;
    gap: 0.1rem;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1;
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--color-text);
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

/* ============================================
   SKILLS
   ============================================ */
.skills {
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: var(--container-width);
    margin: 0 auto;
}

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

.skill-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
    transition: transform 0.3s var(--ease), padding-left 0.3s var(--ease), border-color 0.3s ease;
    cursor: default;
}

.skill-item:hover {
    padding-left: 1rem;
    border-bottom-color: var(--color-text);
    transform: translateY(-3px);
}

.skill-name {
    display: block;
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: color 0.4s ease;
}

.skill-desc {
    font-size: 0.95rem;
    color: var(--color-text-light);
    opacity: 0;
    height: 0;
    overflow: hidden;
    transition: all var(--transition);
}

.skill-item:hover .skill-desc {
    opacity: 1;
    height: auto;
    margin-top: 0.5rem;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services-section {
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: var(--container-width);
    margin: 0 auto;
}

.services-list { display: flex; flex-direction: column; }

.service-item {
    display: grid;
    grid-template-columns: 4rem 1fr auto;
    align-items: start;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: padding-left 0.3s var(--ease), background 0.3s ease;
    position: relative;
}

.service-item:first-child { border-top: 1px solid var(--color-border); }

.service-item:hover { padding-left: 1rem; }

.service-num {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    padding-top: 0.2rem;
    transition: color 0.3s ease;
}

.service-item:hover .service-num,
.service-item.open .service-num { color: var(--color-text); }

.service-name {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 0;
    transition: color 0.3s ease;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease), margin-top 0.3s ease, opacity 0.3s ease;
    opacity: 0;
}

.service-item.open .service-desc {
    max-height: 120px;
    margin-top: 0.75rem;
    opacity: 1;
}

.service-arrow {
    font-size: 1.25rem;
    color: var(--color-text-light);
    transition: transform 0.3s var(--ease), color 0.3s ease;
    padding-top: 0.15rem;
    line-height: 1;
}

.service-item:hover .service-arrow,
.service-item.open .service-arrow {
    transform: rotate(0deg) scale(1.2);
    color: var(--color-text);
}

.service-item.open .service-arrow { transform: rotate(45deg); }

/* ============================================
   PROJECTS — HORIZONTAL SCROLL
   ============================================ */
.projects-section {
    position: relative;
    background: var(--color-bg);
}

.projects-pin {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* UI overlay (counter + label) */
.projects-ui {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem 4rem;
    pointer-events: none;
}

.projects-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.projects-counter {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pc-sep { color: var(--color-text-light); font-weight: 400; }

/* Track — holds all panels side by side */
.projects-track {
    display: flex;
    flex-wrap: nowrap;
    height: 100vh;
    will-change: transform;
}

/* Each panel */
.project-panel {
    flex: 0 0 100vw;
    width: 100vw;
    height: 100vh;
    display: flex;
    overflow: hidden;
    position: relative;
}

/* Left info column */
.panel-left {
    width: 42%;
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    border-right: 1px solid var(--color-border);
    background: var(--color-bg);
    transition: background 0.5s ease;
    z-index: 2;
}

.project-panel.is-active .panel-left {
    background: var(--color-bg);
}

/* Giant background number */
.panel-bg-num {
    position: absolute;
    bottom: -0.1em;
    left: -0.05em;
    font-family: var(--font-heading);
    font-size: clamp(12rem, 22vw, 20rem);
    font-weight: 700;
    line-height: 1;
    color: var(--color-text);
    opacity: 0.035;
    letter-spacing: -0.05em;
    pointer-events: none;
    user-select: none;
    transition: opacity 0.5s ease;
}

.project-panel.is-active .panel-bg-num { opacity: 0.05; }

/* Panel content */
.panel-content {
    padding: 7rem 4rem 4rem;
    position: relative;
    z-index: 1;
    width: 100%;
}

.panel-top-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.panel-index {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.panel-year {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-light);
    letter-spacing: 0.08em;
}

.panel-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    transition: color 0.4s ease;
}

.panel-tagline {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.panel-desc {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-light);
    margin-bottom: 2rem;
    max-width: 48ch;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.panel-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.panel-tag {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    border: 1px solid var(--color-border);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-light);
    background: transparent;
    transition: all 0.3s ease;
}

.project-panel.is-active .panel-tag {
    border-color: var(--color-text);
    color: var(--color-text);
}

.panel-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 2rem;
    background: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid var(--color-text);
    letter-spacing: 0.03em;
    transition: all 0.3s var(--ease);
    opacity: 0.5;
    pointer-events: none;
}

.project-panel.is-active .panel-link {
    opacity: 1;
    pointer-events: auto;
}

.panel-link:hover {
    background: transparent;
    color: var(--color-text);
    gap: 1rem;
}

/* Right image column */
.panel-right {
    width: 58%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.panel-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(80%) brightness(0.85);
    transform: scale(1.05);
    transition: filter 0.8s var(--ease), transform 0.8s var(--ease);
    will-change: transform, filter;
}

.project-panel.is-active .panel-img {
    filter: grayscale(0%) brightness(1);
    transform: scale(1);
}

.panel-img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, var(--color-bg) 0%, transparent 15%),
                linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.2) 100%);
    pointer-events: none;
    z-index: 1;
    transition: background 0.5s ease;
}

[data-theme="dark"] .panel-img-overlay {
    background: linear-gradient(to right, var(--color-bg) 0%, transparent 15%),
                linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.4) 100%);
}

/* Bottom progress bar */
.projects-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-border);
    z-index: 20;
}

.projects-progress-fill {
    height: 100%;
    background: var(--color-text);
    width: 0%;
    transition: width 0.15s ease;
}

/* ============================================
   CV
   ============================================ */
.cv {
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: var(--container-width);
    margin: 0 auto;
    text-align: center;
}

.cv-container { display: inline-block; }
.cv-title { margin-bottom: 1rem; }

.cv-desc {
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-light);
    max-width: 40ch;
}

.cv-button {
    display: inline-block;
    position: relative;
    padding: 0.5rem 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    transition: all 0.3s var(--ease);
}

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

.button-underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-text);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}

.cv-button:hover .button-underline { transform: scaleX(1); transform-origin: left; }

/* ============================================
   CONTACT
   ============================================ */
.contact {
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
}

.contact-form { display: flex; flex-direction: column; gap: 2rem; }
.form-group { position: relative; padding-top: 1.5rem; }

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0;
    border: none;
    border-bottom: 1px solid var(--color-border);
    background: transparent;
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    resize: none;
    transition: border-color var(--transition);
    cursor: text;
}

.form-group textarea { min-height: 100px; }

.form-group label {
    position: absolute;
    top: 1.5rem;
    left: 0;
    color: var(--color-text-light);
    font-size: 1rem;
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus { outline: none; border-bottom-color: var(--color-text); }

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: 0;
    font-size: 0.875rem;
    color: var(--color-text);
}

.submit-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background-color: var(--color-text);
    color: var(--color-bg);
    border: 1px solid var(--color-text);
    border-radius: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    align-self: flex-start;
    transition: all var(--transition);
    cursor: pointer;
}

.submit-button:hover:not(:disabled) {
    background-color: transparent;
    color: var(--color-text);
    transform: translateY(-2px);
}

.submit-button:disabled { opacity: 0.7; cursor: not-allowed; }

.submit-button.clicked {
    background-color: var(--color-text) !important;
    color: var(--color-bg) !important;
    border-color: var(--color-text) !important;
}

.submit-button.clicked span { animation: fadeOutIn 0.5s ease; }

@keyframes fadeOutIn {
    0% { opacity: 1; }
    50% { opacity: 0; }
    100% { opacity: 1; }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--spacing-lg) var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links { display: flex; gap: var(--spacing-md); flex-wrap: wrap; }

.footer-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.95rem;
    position: relative;
    padding: 0.25rem 0;
    transition: color 0.3s ease;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-text);
    transition: width var(--transition);
}

.footer-link:hover::after { width: 100%; }
.footer-copyright { color: var(--color-text-light); font-size: 0.875rem; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (min-width: 769px) and (max-width: 1024px) {
    .nav-container { padding: 0 0.5rem; }
    .nav-links-glass { padding: 0.5rem 1rem; gap: 1rem; }
    .nav-links { gap: 1rem; }
    .about-container { gap: 2rem; }
    .skills-list { grid-template-columns: repeat(2, 1fr); }
    .panel-content { padding: 6rem 3rem 3rem; }
    .panel-title { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
    .stats-container { padding: 0 1rem; }
    .stat-item { padding: 2rem 1rem; }
}

@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.4rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --glass-bg: rgba(255, 255, 255, 0.7);
        --glass-bg-strong: rgba(255, 255, 255, 0.85);
    }

    [data-theme="dark"] {
        --glass-bg: rgba(15, 15, 15, 0.7);
        --glass-bg-strong: rgba(10, 10, 10, 0.85);
    }

    h1 { font-size: clamp(2.5rem, 12vw, 4rem); line-height: 1.1; letter-spacing: -0.02em; }
    h2 { font-size: clamp(1.75rem, 8vw, 2.25rem); line-height: 1.2; }
    h3 { font-size: 1.25rem; }
    p  { font-size: 1rem; line-height: 1.6; }

    /* Nav */
    .nav { top: 0.5rem; padding: 0 0.75rem; }
    .nav-logo-glass { padding: 0.4rem 1rem; }
    .nav-links-glass { display: none !important; }
    .mobile-menu-btn { display: flex; }

    /* Sidebar */
    .mobile-sidebar { width: 280px; padding: 80px 16px 20px; }
    .sidebar-link { padding: 13px 14px; }

    /* Hero */
    .hero { min-height: 90vh; padding: 0 1rem; }
    .hero-name { margin-bottom: 0.5rem; }
    .hero-subtitle { font-size: clamp(0.95rem, 4vw, 1.25rem); margin-bottom: var(--spacing-md); min-height: 1.75rem; }
    .cta-button { padding: 0.875rem 1.75rem; font-size: 0.95rem; }
    .scroll-hint { bottom: 2rem; }
    .scroll-line { height: 40px; }

    /* Marquee */
    .marquee-content { font-size: 0.75rem; }

    /* About */
    .about { padding: var(--spacing-lg) 1.25rem; }
    .about-container { grid-template-columns: 1fr; gap: var(--spacing-md); }
    .about-content p { font-size: 0.95rem; margin-bottom: 1rem; }
    .about-intro { font-size: 1.125rem !important; margin-bottom: 1rem !important; }
    .image-frame { padding-top: 80%; margin-top: 1rem; }

    /* Stats */
    .stats-container {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
        gap: 0;
    }
    .stat-divider { display: none; }
    .stat-item {
        padding: 2rem 1rem;
        border-bottom: 1px solid var(--color-border);
    }
    .stat-item:nth-child(odd) { border-right: 1px solid var(--color-border); }
    .stat-num { font-size: clamp(2rem, 10vw, 3rem); }

    /* Skills */
    .skills { padding: var(--spacing-lg) 1.25rem; }
    .skills-list { grid-template-columns: 1fr; gap: 0.75rem; }
    .skill-item { padding: 1.25rem 0; }
    .skill-item:hover { padding-left: 0.5rem; }
    .skill-name { font-size: 1.1rem; }
    .skill-desc { opacity: 1; height: auto; margin-top: 0.35rem; font-size: 0.875rem; }

    /* Services */
    .services-section { padding: var(--spacing-lg) 1.25rem; }
    .service-item { grid-template-columns: 3rem 1fr auto; gap: 1rem; padding: 1.5rem 0; }
    .service-name { font-size: 1.1rem; }
    .service-item:hover { padding-left: 0.5rem; }

    /* Projects — mobile: vertical stack */
    .projects-section { overflow: visible; }
    .projects-pin { height: auto; overflow: visible; }
    .projects-ui { position: relative; padding: 2rem 1.25rem 1rem; }
    .projects-track {
        flex-direction: column;
        height: auto;
        transform: none !important; /* override GSAP on mobile */
    }
    .project-panel {
        flex: none;
        width: 100%;
        height: auto;
        min-height: 90vh;
        flex-direction: column;
        border-bottom: 1px solid var(--color-border);
    }
    .panel-left {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }
    .panel-right {
        width: 100%;
        height: 55vw;
        min-height: 220px;
    }
    .panel-content { padding: 2rem 1.25rem 2rem; }
    .panel-bg-num { font-size: 40vw; bottom: -0.1em; }
    .panel-title { font-size: clamp(1.75rem, 8vw, 2.5rem); }
    .panel-desc { -webkit-line-clamp: 5; }
    .panel-link { opacity: 1; pointer-events: auto; }
    .panel-img { filter: grayscale(0%) brightness(1); transform: scale(1); }
    .panel-img-overlay {
        background: linear-gradient(to bottom, transparent 70%, rgba(0,0,0,0.15) 100%);
    }
    .projects-progress-bar { position: relative; }

    /* CV */
    .cv { padding: var(--spacing-lg) 1.25rem; }
    .cv-title { font-size: 1.5rem; }
    .cv-desc { font-size: 0.9rem; margin-bottom: 1.5rem; }

    /* Contact */
    .contact { padding: var(--spacing-lg) 1.25rem; }
    .contact-form { gap: 1.25rem; }
    .form-group { padding-top: 1rem; }
    .form-group label { font-size: 0.9rem; top: 1rem; }
    .form-group input,
    .form-group textarea { font-size: 0.95rem; }
    .submit-button { width: 100%; justify-content: center; padding: 0.875rem 1.25rem; font-size: 0.9rem; }

    /* Footer */
    .footer { padding: var(--spacing-md) 1.25rem; margin-top: var(--spacing-lg); }
    .footer-container { flex-direction: column; text-align: center; gap: 1rem; }
    .footer-links { flex-wrap: wrap; justify-content: center; gap: 1rem; }
    .footer-link { font-size: 0.85rem; }
    .footer-copyright { font-size: 0.8rem; }
}

@media (max-width: 375px) {
    :root { --spacing-sm: 0.5rem; --spacing-md: 1rem; --spacing-lg: 2rem; }
    .hero-name { font-size: clamp(2rem, 10vw, 3rem); }
    .hero-subtitle { font-size: 0.9rem; }
    .mobile-sidebar { width: 260px; }
    .footer-links { gap: 0.75rem; }
    .footer-link { font-size: 0.8rem; }
    .section-title { font-size: 1.5rem; }
}

@media (max-width: 768px) and (orientation: landscape) {
    .hero { min-height: 100svh; }
    .skills-list { gap: 0.5rem; }
    .skill-item { padding: 0.5rem 0; }
    .mobile-sidebar { width: 260px; overflow-y: auto; }
}

@media (hover: none) and (pointer: coarse) {
    .skill-item:hover { padding-left: 0; transform: none; }
    .skill-item:active { padding-left: 0.5rem; }
    .cta-button:active { transform: translateY(-2px); }

    .sidebar-link,
    .sidebar-theme-toggle,
    .mobile-menu-btn,
    .cta-button,
    .panel-link,
    .cv-button,
    .submit-button,
    .footer-link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

@supports (padding: max(0px)) {
    .nav {
        padding-left: max(0.5rem, env(safe-area-inset-left));
        padding-right: max(0.5rem, env(safe-area-inset-right));
        top: max(0.5rem, env(safe-area-inset-top));
    }
    .hero, .about, .skills, .services-section, .cv, .contact, .footer {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }
    .mobile-sidebar { padding-top: max(80px, calc(env(safe-area-inset-top) + 60px)); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .mobile-sidebar, .sidebar-overlay { transition: none; }
    .marquee-track { animation: none; }
}