/* ============================================
   MATERIAL 3 ADAPTIVE PORTFOLIO
   Antonio Lafuente — Software Developer
   ============================================ */

/* --- M3 Design Tokens --- */
:root {
    /* Light theme — green tonal palette */
    --md-sys-color-primary: #2E7D32;
    --md-sys-color-on-primary: #FFFFFF;
    --md-sys-color-primary-container: #B9F6CA;
    --md-sys-color-on-primary-container: #002107;
    --md-sys-color-secondary: #546354;
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-secondary-container: #D7E8D4;
    --md-sys-color-on-secondary-container: #121F13;
    --md-sys-color-tertiary: #3A6570;
    --md-sys-color-on-tertiary: #FFFFFF;
    --md-sys-color-tertiary-container: #BDEAF7;
    --md-sys-color-on-tertiary-container: #001F26;
    --md-sys-color-surface: #F8FAF6;
    --md-sys-color-surface-dim: #D9DBD6;
    --md-sys-color-surface-bright: #F8FAF6;
    --md-sys-color-surface-container-lowest: #FFFFFF;
    --md-sys-color-surface-container-low: #F2F5EF;
    --md-sys-color-surface-container: #ECEFEA;
    --md-sys-color-surface-container-high: #E6EAE4;
    --md-sys-color-surface-container-highest: #E1E4DF;
    --md-sys-color-on-surface: #1A1C1A;
    --md-sys-color-on-surface-variant: #424941;
    --md-sys-color-outline: #727971;
    --md-sys-color-outline-variant: #C2C9BF;
    --md-sys-color-error: #BA1A1A;
    --md-sys-color-on-error: #FFFFFF;
    --md-sys-color-inverse-surface: #2F312F;
    --md-sys-color-inverse-on-surface: #F1F1ED;
    --md-sys-color-inverse-primary: #8CE892;
    --md-sys-color-scrim: #000000;
    --md-sys-color-surface-tint: #2E7D32;

    /* Elevation */
    --md-sys-elevation-1: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
    --md-sys-elevation-2: 0 1px 2px rgba(0,0,0,0.3), 0 2px 6px 2px rgba(0,0,0,0.15);
    --md-sys-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3);

    /* Shape */
    --md-sys-shape-corner-none: 0px;
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-extra-large: 28px;
    --md-sys-shape-corner-full: 9999px;

    /* Typography scale (fluid) */
    --md-sys-typescale-display-large: clamp(4rem, 10vw, 8rem);
    --md-sys-typescale-headline-large: clamp(2.25rem, 4vw + 0.75rem, 3.25rem);
    --md-sys-typescale-headline-medium: clamp(1.375rem, 2.5vw + 0.5rem, 1.75rem);
    --md-sys-typescale-title-large: clamp(1.125rem, 2vw + 0.25rem, 1.375rem);
    --md-sys-typescale-title-medium: clamp(1rem, 1.5vw + 0.25rem, 1.125rem);
    --md-sys-typescale-body-large: clamp(1rem, 1.5vw + 0.125rem, 1.125rem);
    --md-sys-typescale-body-medium: 0.875rem;
    --md-sys-typescale-label-large: 0.875rem;
    --md-sys-typescale-label-small: 0.75rem;

    /* Motion */
    --md-sys-motion-duration-short-1: 100ms;
    --md-sys-motion-duration-short-2: 150ms;
    --md-sys-motion-duration-medium-1: 250ms;
    --md-sys-motion-duration-medium-2: 300ms;
    --md-sys-motion-duration-long-1: 450ms;
    --md-sys-motion-duration-long-2: 500ms;
    --md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
    --md-sys-motion-easing-decelerate: cubic-bezier(0, 0, 0, 1);
    --md-sys-motion-easing-accelerate: cubic-bezier(0.3, 0, 1, 1);

    /* Spacing scale */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    --space-5xl: 128px;

    /* Layout */
    --layout-max-width: 1200px;
    --layout-content-padding: clamp(16px, 4vw, 48px);
    --nav-height: 64px;
}

/* Dark theme */
[data-theme="dark"] {
    --md-sys-color-primary: #8CE892;
    --md-sys-color-on-primary: #003914;
    --md-sys-color-primary-container: #00531E;
    --md-sys-color-on-primary-container: #B9F6CA;
    --md-sys-color-secondary: #BBC8B8;
    --md-sys-color-on-secondary: #263226;
    --md-sys-color-secondary-container: #3C493C;
    --md-sys-color-on-secondary-container: #D7E8D4;
    --md-sys-color-tertiary: #A2CEDA;
    --md-sys-color-on-tertiary: #023640;
    --md-sys-color-tertiary-container: #1F4D57;
    --md-sys-color-on-tertiary-container: #BDEAF7;
    --md-sys-color-surface: #121412;
    --md-sys-color-surface-dim: #121412;
    --md-sys-color-surface-bright: #383A37;
    --md-sys-color-surface-container-lowest: #0C0E0C;
    --md-sys-color-surface-container-low: #1A1C1A;
    --md-sys-color-surface-container: #1E201E;
    --md-sys-color-surface-container-high: #292B28;
    --md-sys-color-surface-container-highest: #343633;
    --md-sys-color-on-surface: #E3E3DF;
    --md-sys-color-on-surface-variant: #C2C9BF;
    --md-sys-color-outline: #8C938A;
    --md-sys-color-outline-variant: #424941;
    --md-sys-color-error: #FFB4AB;
    --md-sys-color-on-error: #690005;
    --md-sys-color-inverse-surface: #E3E3DF;
    --md-sys-color-inverse-on-surface: #2F312F;
    --md-sys-color-inverse-primary: #2E7D32;
    --md-sys-color-surface-tint: #8CE892;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + var(--space-lg));
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
    font-size: var(--md-sys-typescale-body-large);
    line-height: 1.6;
    color: var(--md-sys-color-on-surface);
    background-color: var(--md-sys-color-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color var(--md-sys-motion-duration-medium-2) var(--md-sys-motion-easing-standard),
                color var(--md-sys-motion-duration-medium-2) var(--md-sys-motion-easing-standard);
}

/* Noise overlay for texture */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    mix-blend-mode: overlay;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: 'Bricolage Grotesque', system-ui, sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

/* --- Navigation --- */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 100;
    background: color-mix(in srgb, var(--md-sys-color-surface) 85%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    transition: transform var(--md-sys-motion-duration-medium-2) var(--md-sys-motion-easing-standard),
                background var(--md-sys-motion-duration-medium-2) var(--md-sys-motion-easing-standard);
}

.top-nav.nav-hidden {
    transform: translateY(-100%);
}

.nav-inner {
    max-width: var(--layout-max-width);
    margin: 0 auto;
    padding: 0 var(--layout-content-padding);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-logo {
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
    color: var(--md-sys-color-primary);
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-left: auto;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-shrink: 0;
}

/* Language toggle */
.lang-toggle {
    height: 36px;
    min-width: 48px;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-full);
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard),
                border-color var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
    padding: 0 var(--space-md);
}

.lang-toggle:hover {
    background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
    border-color: var(--md-sys-color-outline);
}

.lang-label {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 600;
    letter-spacing: 0.04em;
}

.nav-links a {
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--md-sys-shape-corner-full);
    color: var(--md-sys-color-on-surface-variant);
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard),
                color var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
    position: relative;
}

.nav-links a:hover {
    background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
    color: var(--md-sys-color-on-surface);
}

.nav-cta {
    background: var(--md-sys-color-primary) !important;
    color: var(--md-sys-color-on-primary) !important;
}

.nav-cta:hover {
    box-shadow: var(--md-sys-elevation-1);
    background: color-mix(in srgb, var(--md-sys-color-primary) 92%, var(--md-sys-color-on-surface)) !important;
}

/* Theme toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    position: absolute;
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                opacity var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.icon-sun { opacity: 0; transform: rotate(90deg) scale(0.5); }
.icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }

[data-theme="dark"] .icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
[data-theme="dark"] .icon-moon { opacity: 0; transform: rotate(-90deg) scale(0.5); }

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-left: auto;
}

.mobile-menu-btn span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--md-sys-color-on-surface);
    border-radius: 1px;
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                opacity var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--md-sys-color-surface-container);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    z-index: 99;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--md-sys-motion-duration-medium-2) var(--md-sys-motion-easing-emphasized),
                opacity var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-menu a {
    padding: var(--space-md);
    border-radius: var(--md-sys-shape-corner-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.mobile-menu a:hover {
    background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
}

.mobile-menu .mobile-lang-row {
    display: flex;
    justify-content: center;
    padding: var(--space-md) 0 0;
    border-top: 1px solid var(--md-sys-color-outline-variant);
    margin-top: var(--space-sm);
}

.mobile-menu .mobile-lang-btn {
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 600;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border: none;
    cursor: pointer;
    letter-spacing: 0.04em;
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: calc(var(--nav-height) + var(--space-3xl)) var(--layout-content-padding) var(--space-4xl);
    max-width: var(--layout-max-width);
    margin: 0 auto;
    gap: var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: var(--md-sys-typescale-display-large);
    font-weight: 700;
    line-height: 0.85;
    letter-spacing: -0.04em;
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-md);
}

.hero-eyebrow {
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: var(--md-sys-typescale-title-large);
    line-height: 1.5;
    color: var(--md-sys-color-on-surface-variant);
    max-width: 520px;
    margin-bottom: var(--space-xl);
}

.hero-subtitle strong {
    color: var(--md-sys-color-on-surface);
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-xl);
    height: 48px;
    border-radius: var(--md-sys-shape-corner-full);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    letter-spacing: 0.02em;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

.btn-primary:hover {
    box-shadow: var(--md-sys-elevation-1);
    background: color-mix(in srgb, var(--md-sys-color-primary) 92%, var(--md-sys-color-on-surface));
}

.btn-tonal {
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.btn-tonal:hover {
    box-shadow: var(--md-sys-elevation-1);
    background: color-mix(in srgb, var(--md-sys-color-secondary-container) 92%, var(--md-sys-color-on-surface));
}

/* Meta chips */
.meta-chip {
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface-container-high);
    color: var(--md-sys-color-on-surface-variant);
    border: 1px solid var(--md-sys-color-outline-variant);
}

/* Hero visual — abstract geometric shape */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 400px;
}

.hero-shape {
    width: 380px;
    height: 380px;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    background: linear-gradient(
        135deg,
        var(--md-sys-color-primary-container) 0%,
        var(--md-sys-color-tertiary-container) 50%,
        var(--md-sys-color-secondary-container) 100%
    );
    animation: morph 8s ease-in-out infinite;
    position: relative;
}

.hero-shape::after {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: inherit;
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--md-sys-color-primary) 15%, transparent),
        color-mix(in srgb, var(--md-sys-color-tertiary) 15%, transparent)
    );
    filter: blur(40px);
    z-index: -1;
}

@keyframes morph {
    0%, 100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
}

/* --- Sections --- */
.section {
    padding: var(--space-5xl) var(--layout-content-padding);
}

.section-alt {
    background: var(--md-sys-color-surface-container-low);
}

.section-inner {
    max-width: var(--layout-max-width);
    margin: 0 auto;
}

.section-header {
    margin-bottom: var(--space-3xl);
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.section-label {
    display: inline-block;
    font-size: var(--md-sys-typescale-headline-large);
    font-weight: 800;
    color: var(--md-sys-color-primary);
    letter-spacing: -0.01em;
    font-family: 'Bricolage Grotesque', sans-serif;
    margin-bottom: 0;
    line-height: 1;
    opacity: 0.85;
}

.section-title {
    font-size: var(--md-sys-typescale-headline-large);
    font-weight: 700;
    color: var(--md-sys-color-on-surface);
    line-height: 1.1;
}

/* --- About --- */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-lead {
    font-size: var(--md-sys-typescale-title-large);
    line-height: 1.5;
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-md);
}

.about-text p {
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.stat-card {
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-large);
    padding: var(--space-lg);
    text-align: center;
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-1);
}

.stat-number {
    display: block;
    font-family: 'Bricolage Grotesque', sans-serif;
    font-size: var(--md-sys-typescale-headline-medium);
    font-weight: 700;
    color: var(--md-sys-color-primary);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: var(--md-sys-typescale-label-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: var(--space-xs);
}

/* --- Timeline / Experience --- */
.timeline {
    position: relative;
    padding-left: var(--space-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--md-sys-color-outline-variant);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-2xl);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-xl) + 1px);
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--md-sys-color-primary);
    border: 3px solid var(--md-sys-color-surface);
    box-shadow: 0 0 0 2px var(--md-sys-color-primary);
    z-index: 1;
}

.section-alt .timeline-marker {
    border-color: var(--md-sys-color-surface-container-low);
}

.timeline-card {
    background: var(--md-sys-color-surface-container-lowest);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: var(--space-xl);
    border: 1px solid var(--md-sys-color-outline-variant);
    transition: box-shadow var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard);
}

[data-theme="dark"] .timeline-card {
    background: var(--md-sys-color-surface-container);
}

.timeline-card:hover {
    box-shadow: var(--md-sys-elevation-1);
}

.timeline-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.timeline-role {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
}

.timeline-company {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 2px;
}

.timeline-date {
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
    color: var(--md-sys-color-primary);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--md-sys-shape-corner-full);
    white-space: nowrap;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.tag {
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.timeline-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.timeline-details li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.6;
}

.timeline-details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--md-sys-color-outline);
}

/* --- Skills Bento Grid --- */
.skills-bento {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.bento-card {
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: var(--space-xl);
    border: 1px solid transparent;
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                border-color var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard);
}

.bento-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-1);
    border-color: var(--md-sys-color-outline-variant);
}

.bento-wide {
    grid-column: span 2;
}

.bento-title {
    font-size: var(--md-sys-typescale-title-medium);
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-md);
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.pill {
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface-variant);
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard),
                color var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.bento-card:hover .pill {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

/* --- Projects --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.project-card {
    background: var(--md-sys-color-surface-container-lowest);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: var(--space-xl);
    border: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard);
}

[data-theme="dark"] .project-card {
    background: var(--md-sys-color-surface-container);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-sys-elevation-2);
}

.project-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--md-sys-shape-corner-large);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-icon svg {
    width: 24px;
    height: 24px;
}

.project-name {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
}

.project-desc {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.6;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag-sm {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 2px var(--space-sm);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
}

.project-link {
    width: 44px;
    height: 44px;
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-link svg {
    width: 20px;
    height: 20px;
}

.project-link:hover {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    transform: translateY(-2px);
}

.project-card {
    position: relative;
}

/* --- Education --- */
.education-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.edu-card {
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-large);
    padding: var(--space-lg);
    border: 1px solid transparent;
    transition: transform var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard),
                border-color var(--md-sys-motion-duration-medium-1) var(--md-sys-motion-easing-standard);
    display: flex;
    flex-direction: column;
}

.edu-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-1);
    border-color: var(--md-sys-color-outline-variant);
}

.edu-year {
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 600;
    color: var(--md-sys-color-primary);
    margin-bottom: var(--space-sm);
}

.edu-title {
    font-size: var(--md-sys-typescale-title-medium);
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.edu-inst {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: var(--space-sm);
}

.edu-desc {
    font-size: var(--md-sys-typescale-label-small);
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.5;
}

/* Languages */
.languages-row {
    text-align: center;
}

.languages-title {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-md);
}

.lang-chips {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.lang-chip {
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.lang-chip em {
    font-style: normal;
    opacity: 0.7;
    margin-left: var(--space-xs);
}

/* --- Contact --- */
.contact-wrapper {
    background: var(--md-sys-color-primary-container);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: var(--space-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
    pointer-events: none;
}

.contact-content {
    position: relative;
    z-index: 1;
}

.contact-content .section-label {
    color: var(--md-sys-color-on-primary-container);
}

.contact-content .section-title {
    color: var(--md-sys-color-on-primary-container);
    margin-bottom: var(--space-md);
}

.contact-text {
    font-size: var(--md-sys-typescale-title-large);
    color: var(--md-sys-color-on-primary-container);
    opacity: 0.85;
    max-width: 480px;
    margin: 0 auto var(--space-xl);
}

.contact-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-surface-container-lowest);
    color: var(--md-sys-color-on-surface);
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    transition: transform var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.contact-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-1);
}

.contact-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* --- Footer --- */
.footer {
    padding: var(--space-2xl) var(--layout-content-padding);
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.footer-inner {
    max-width: var(--layout-max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--md-sys-typescale-label-small);
    color: var(--md-sys-color-on-surface-variant);
    flex-wrap: wrap;
}

.footer-rights {
    font-size: var(--md-sys-typescale-label-small);
    color: var(--md-sys-color-on-surface-variant);
    opacity: 0.6;
    text-align: center;
    flex-shrink: 0;
}

/* Project Actions & Demo Button */
.project-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: 1.5rem;
}

.project-actions .project-link {
    position: static;
    opacity: 1;
    transform: none;
    width: 44px;
    height: 44px;
    background: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-actions .project-link:hover {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    transform: translateY(-2px);
}

.btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    flex-grow: 1;
    justify-content: center;
}

.btn-demo svg, .btn-screenshots svg {
    width: 18px;
    height: 18px;
}

.screenshot-btn, .cert-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: transparent;
    border: none;
    color: var(--md-sys-color-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--md-sys-shape-corner-medium);
    transition: background var(--md-sys-motion-duration-short-2) var(--md-sys-motion-easing-standard);
}

.screenshot-btn svg, .cert-btn svg {
    width: 18px;
    height: 18px;
}

.screenshot-btn:hover, .cert-btn:hover {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.cert-btn {
    margin-left: auto;
    margin-top: var(--space-md);
}

.btn-demo:hover {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-screenshots {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    flex-grow: 1;
    justify-content: center;
}

.btn-screenshots:hover {
    background: var(--md-sys-color-tertiary);
    color: var(--md-sys-color-on-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Video Modal */
.video-modal {
    border: none;
    padding: 0;
    background: transparent;
    max-width: 90vw;
    width: 800px;
    max-height: 90vh;
    border-radius: 24px;
    overflow: visible;
    margin: auto;
}

.video-modal::backdrop {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.video-container {
    position: relative;
    background: #000;
    border-radius: 24px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    line-height: 0;
}

.video-modal video {
    width: 100%;
    max-height: 80vh;
    display: block;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(4px);
}

.close-modal:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* Screenshot Modal Carousel */
.screenshot-modal {
    border: none;
    padding: 0;
    background: transparent;
    max-width: 90vw;
    width: 1000px;
    max-height: 90vh;
    border-radius: 28px;
    margin: auto;
}

.screenshot-modal::backdrop {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
}

.screenshot-container {
    position: relative;
    background: var(--md-sys-color-surface-container-high);
    border-radius: 28px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.screenshot-container img {
    max-width: 100%;
    max-height: 80vh;
    display: block;
    object-fit: contain;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

.screenshot-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(4px);
    z-index: 10;
}

.screenshot-nav:hover {
    background: rgba(255, 255, 255, 0.3);
}

.screenshot-nav.prev { left: 1rem; }
.screenshot-nav.next { right: 1rem; }

.screenshot-counter {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.4);
    color: white;
    padding: 4px 12px;
    border-radius: var(--md-sys-shape-corner-full);
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
}

/* --- Certificate Modal --- */
.cert-modal {
    border: none;
    padding: 0;
    background: transparent;
    max-width: 90vw;
    width: 800px;
    height: 90vh; /* Set a specific height */
    border-radius: 28px;
    margin: auto;
}

.cert-modal::backdrop {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
}

.cert-container {
    position: relative;
    background: var(--md-sys-color-surface-container-high);
    border-radius: 28px;
    overflow: hidden;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.cert-container iframe {
    flex-grow: 1;
    border: none;
    border-radius: 0 0 28px 28px;
}

.cert-modal .close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    background: rgba(0, 0, 0, 0.5); /* Make it visible over white PDF or dark mode */
}

/* --- Reveal Animations --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--md-sys-motion-duration-long-2) var(--md-sys-motion-easing-decelerate),
                transform var(--md-sys-motion-duration-long-2) var(--md-sys-motion-easing-decelerate);
}

[data-reveal="left"] {
    transform: translateX(-24px);
}

[data-reveal="right"] {
    transform: translateX(24px);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translate(0, 0);
}

[data-delay="1"] { transition-delay: 80ms; }
[data-delay="2"] { transition-delay: 160ms; }
[data-delay="3"] { transition-delay: 240ms; }
[data-delay="4"] { transition-delay: 320ms; }
[data-delay="5"] { transition-delay: 400ms; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

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

    .hero-visual {
        display: none;
    }

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

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

    .bento-wide {
        grid-column: span 2;
    }

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

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

@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    .nav-links {
        display: none;
    }

    .nav-actions {
        margin-left: auto;
    }

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

    .hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + var(--space-3xl));
        padding-bottom: var(--space-3xl);
    }

    .hero-title {
        font-size: clamp(3.5rem, 12vw, 5rem);
    }

    .skills-bento {
        grid-template-columns: 1fr;
    }

    .bento-wide {
        grid-column: span 1;
    }

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

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

    .timeline-card-header {
        flex-direction: column;
    }

    .contact-wrapper {
        padding: var(--space-xl);
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }
}

/* --- Print --- */
@media print {
    .top-nav, .theme-toggle, .mobile-menu-btn, .noise-overlay, .hero-visual {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    .section {
        padding: 24px 0;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}