:root {
    --palette-primary: #5b5cf6;
    --palette-primary-dark: #4f46e5;
    --palette-secondary: #7c3aed;
    --palette-accent: #06b6d4;
    --palette-dark: #0f172a;
    --palette-light: #f8fafc;
    --palette-gray: #64748b;
    --palette-success: #22d3ee;
    --palette-danger: #f43f5e;
    --palette-warning: #f59e0b;
    --palette-info: #38bdf8;
    --palette-white: #ffffff;
    --palette-black: #000000;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.1);
    --shadow-xl: 0 24px 64px rgba(15, 23, 42, 0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --primary: var(--palette-primary);
    --primary-dark: var(--palette-primary-dark);
    --secondary: var(--palette-secondary);
    --accent: var(--palette-accent);

    --bg-body: #f1f5f9;
    --text-body: var(--palette-dark);
    --text-muted: var(--palette-gray);
    --bg-header: rgba(255, 255, 255, 0.72);
    --bg-card: var(--palette-white);
    --bg-skill-item: var(--palette-white);
    --bg-image-placeholder: #e2e8f0;
    --bg-image-placeholder-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 45%, #06b6d4 100%);
    --text-image-placeholder: var(--palette-white);
    --bg-project-link: rgba(15, 23, 42, 0.08);
    --text-project-link: var(--primary);
    --bg-project-link-hover: var(--primary);
    --text-project-link-hover: var(--palette-white);
    --bg-tag: rgba(91, 92, 246, 0.12);
    --text-tag: var(--primary-dark);
    --color-link: var(--primary);
    --color-logo-base: var(--palette-dark);
    --color-logo-accent: var(--primary);
    --color-nav-link: var(--palette-dark);
    --color-nav-link-hover: var(--primary);
    --bg-nav-link-hover: rgba(91, 92, 246, 0.1);
    --section-header-underline: linear-gradient(90deg, var(--primary), var(--accent));

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 0.2s var(--ease-out-expo);
    --transition-theme: 0.45s var(--ease-out-expo);
    --reveal-duration: 0.75s;
    --header-blur: 16px;
    /* Płynne marginesy strony — dopasowanie do szerokości okna */
    --page-gutter: clamp(0.75rem, 4.5vw, 1.5rem);
    --section-y: clamp(2.5rem, 7vw, 5.5rem);
    --content-max: min(1160px, 100%);

    /* Liquid glass (delikatny styl iOS) */
    --glass-filter: blur(20px) saturate(180%);
    --glass-filter-strong: blur(28px) saturate(200%);
    --glass-filter-soft: blur(12px) saturate(160%);
    --glass-surface: rgba(255, 255, 255, 0.48);
    --glass-surface-raised: rgba(255, 255, 255, 0.62);
    --glass-border-outer: rgba(255, 255, 255, 0.55);
    --glass-stroke: rgba(15, 23, 42, 0.07);
    --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.75);
    --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.09), 0 2px 12px rgba(15, 23, 42, 0.05);
    --glass-sheen: linear-gradient(135deg, rgba(255, 255, 255, 0.42) 0%, rgba(255, 255, 255, 0) 48%, rgba(255, 255, 255, 0.08) 100%);
    --glass-hover-bright: rgba(255, 255, 255, 0.72);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overflow-x: clip;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

html.theme-transitioning,
html.theme-transitioning * {
    transition:
        background-color var(--transition-theme),
        color var(--transition-theme),
        border-color var(--transition-theme),
        box-shadow var(--transition-theme),
        backdrop-filter var(--transition-theme),
        -webkit-backdrop-filter var(--transition-theme),
        fill var(--transition-theme) !important;
}

* {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-body);
    line-height: 1.65;
    font-size: clamp(0.95rem, 2.8vw, 1.05rem);
    overflow-x: hidden;
    min-height: 100vh;
    min-height: 100dvh;
    transition: background-color var(--transition-theme), color var(--transition-theme);
}

img,
svg,
video {
    max-width: 100%;
    height: auto;
}

.page-bg {
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 90% 55% at 50% -15%, rgba(91, 92, 246, 0.2), transparent 55%),
        radial-gradient(ellipse 65% 45% at 100% 5%, rgba(6, 182, 212, 0.14), transparent 50%),
        radial-gradient(ellipse 55% 40% at 0% 95%, rgba(168, 85, 247, 0.12), transparent 50%),
        radial-gradient(ellipse 70% 50% at 80% 75%, rgba(99, 102, 241, 0.08), transparent 45%),
        linear-gradient(180deg, #e8eef6 0%, var(--bg-body) 38%, #eef2f8 100%);
    transition: opacity var(--transition-theme);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', 'DM Sans', sans-serif;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 0.75rem;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.35rem, 2.5vw, 1.65rem); font-weight: 500; }
h3 { font-size: clamp(1.35rem, 4vw, 1.65rem); }
h4 { font-size: clamp(1.45rem, 4.5vw, 2rem); }
h5 { font-size: clamp(1.05rem, 3.2vw, 1.2rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

a {
    text-decoration: none;
    color: var(--color-link);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.2rem, 4.2vw, 1.45rem);
    font-weight: 700;
    color: var(--color-logo-base);
    flex-shrink: 0;
    min-width: 0;
}

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

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.65rem;
    min-height: 44px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: clamp(0.9rem, 3vw, 0.98rem);
    border: none;
    cursor: pointer;
    transition: transform 0.25s var(--ease-spring), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
    box-sizing: border-box;
}

.button.primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--palette-white);
    box-shadow: 0 4px 20px rgba(91, 92, 246, 0.35);
}

.button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(91, 92, 246, 0.45);
    color: var(--palette-white);
}

.button.secondary {
    background: var(--glass-surface);
    color: var(--primary);
    border: 1px solid var(--glass-stroke);
    box-shadow: var(--glass-highlight), 0 4px 16px rgba(15, 23, 42, 0.06);
    backdrop-filter: var(--glass-filter-soft);
    -webkit-backdrop-filter: var(--glass-filter-soft);
}

.button.secondary:hover {
    background: var(--glass-surface-raised);
    border-color: rgba(91, 92, 246, 0.22);
    transform: translateY(-2px);
    box-shadow: var(--glass-highlight), 0 8px 24px rgba(91, 92, 246, 0.12);
}

/* Header */
.site-header {
    position: fixed;
    width: 100%;
    max-width: 100vw;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: calc(0.65rem + env(safe-area-inset-top, 0px)) 0 0.65rem;
    background: var(--glass-surface-raised);
    backdrop-filter: var(--glass-filter-strong);
    -webkit-backdrop-filter: var(--glass-filter-strong);
    border-bottom: 1px solid var(--glass-stroke);
    box-shadow:
        var(--glass-highlight),
        0 12px 40px -16px rgba(15, 23, 42, 0.12);
    transition: background-color var(--transition-theme), border-color var(--transition-theme), box-shadow var(--transition-fast), backdrop-filter var(--transition-theme);
}

.site-header::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65) 20%, rgba(91, 92, 246, 0.15) 50%, rgba(255, 255, 255, 0.5) 80%, transparent);
    opacity: 0.85;
    pointer-events: none;
}

.header-container {
    position: relative;
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
    padding-left: max(var(--page-gutter), env(safe-area-inset-left, 0px));
    padding-right: max(var(--page-gutter), env(safe-area-inset-right, 0px));
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.65rem;
    min-width: 0;
}

nav {
    display: flex;
    gap: 0.35rem;
}

nav a {
    color: var(--color-nav-link);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform 0.2s var(--ease-out-expo), border-color var(--transition-fast), box-shadow var(--transition-fast), backdrop-filter var(--transition-fast);
}

nav a:hover {
    color: var(--color-nav-link-hover);
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter-soft);
    -webkit-backdrop-filter: var(--glass-filter-soft);
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

.controls-container {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.theme-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

@media (max-width: 900px) {
    .theme-label {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        border: 0;
    }
}

.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid transparent;
    font-size: 1.35rem;
    color: var(--text-body);
    cursor: pointer;
    padding: 0.55rem;
    min-width: 44px;
    min-height: 44px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast), transform 0.25s var(--ease-spring);
    flex-shrink: 0;
}

.menu-toggle:hover {
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter-soft);
    -webkit-backdrop-filter: var(--glass-filter-soft);
    border: 1px solid var(--glass-stroke);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.menu-toggle.active {
    transform: rotate(90deg);
}

@media (max-width: 768px) {
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        max-width: 100vw;
        flex-direction: column;
        background: var(--glass-surface-raised);
        backdrop-filter: var(--glass-filter-strong);
        -webkit-backdrop-filter: var(--glass-filter-strong);
        border-bottom: 1px solid var(--glass-stroke);
        box-shadow: var(--glass-highlight), 0 16px 48px -20px rgba(15, 23, 42, 0.14);
        padding: 0.75rem 0 calc(1rem + env(safe-area-inset-bottom, 0px));
        box-shadow: var(--shadow-md);
        gap: 0;
        animation: navSlide 0.35s var(--ease-out-expo) forwards;
        max-height: min(70vh, calc(100dvh - 4rem));
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    @keyframes navSlide {
        from {
            opacity: 0;
            transform: translateY(-8px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    nav.active {
        display: flex;
    }

    nav.active a {
        padding: 0.9rem 1.5rem;
        width: 100%;
        border-radius: 0;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .menu-toggle.active i::before {
        content: '\f00d';
    }
}

/* Hero */
.section-hero {
    min-height: 100vh;
    min-height: 100dvh;
    min-height: -webkit-fill-available;
    display: flex;
    align-items: center;
    padding: calc(5.5rem + env(safe-area-inset-top, 0px)) var(--page-gutter) max(2rem, env(safe-area-inset-bottom, 0px));
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
    gap: clamp(1.25rem, 4vw, 2rem);
    box-sizing: border-box;
}

.hero-eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.hero-content {
    flex: 1;
    min-width: 0;
    padding-right: clamp(0px, 3vw, 2rem);
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content h2 {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.hero-lead {
    font-size: clamp(1rem, 3.2vw, 1.1rem);
    max-width: 34rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-image {
    flex: 1;
    min-width: 0;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: min(280px, 40vh);
}

.avatar {
    width: min(320px, 85vw);
    height: min(320px, 85vw);
    background: linear-gradient(145deg, var(--primary), var(--secondary));
    border-radius: 32% 68% 65% 35% / 40% 35% 65% 60%;
    position: relative;
    z-index: 2;
    background-image: url('https://via.placeholder.com/350');
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow-xl);
    transition: transform 0.6s var(--ease-out-expo), border-radius 0.6s var(--ease-out-expo);
}

.avatar:hover {
    transform: scale(1.04) rotate(-2deg);
    border-radius: 50% 50% 48% 52% / 52% 48% 52% 48%;
}

.glow {
    position: absolute;
    width: min(400px, 90vw);
    height: min(400px, 90vw);
    background: radial-gradient(circle, rgba(91, 92, 246, 0.35) 0%, rgba(6, 182, 212, 0.08) 45%, transparent 70%);
    border-radius: 50%;
    animation: pulseGlow 5s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
    0% {
        transform: scale(0.96);
        opacity: 0.75;
    }
    100% {
        transform: scale(1.04);
        opacity: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .glow {
        animation: none;
    }

    .avatar:hover {
        transform: none;
    }
}

@media (max-width: 900px) {
    .section-hero {
        flex-direction: column;
        text-align: center;
        padding-top: calc(4.75rem + env(safe-area-inset-top, 0px));
    }

    .hero-content {
        padding-right: 0;
        width: 100%;
    }

    .hero-buttons {
        justify-content: center;
        width: 100%;
    }

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

/* Scroll reveal */
[data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity var(--reveal-duration) var(--ease-out-expo),
        transform var(--reveal-duration) var(--ease-out-expo);
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

[data-reveal-stagger] {
    opacity: 0;
    transform: translateY(16px);
    transition:
        opacity 0.55s var(--ease-out-expo),
        transform 0.55s var(--ease-out-expo);
    transition-delay: calc(var(--stagger, 0) * 55ms);
}

[data-reveal-stagger].is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    [data-reveal],
    [data-reveal-stagger] {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Sections */
section {
    padding: var(--section-y) var(--page-gutter);
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}

.section-header {
    text-align: center;
    margin-bottom: clamp(2rem, 5vw, 3rem);
}

.section-header h4 {
    color: var(--text-body);
    margin-bottom: 0.65rem;
    position: relative;
    display: inline-block;
}

.section-header h4::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%) scaleX(0.3);
    width: 72px;
    height: 4px;
    background: var(--section-header-underline);
    border-radius: var(--radius-full);
    transition: transform 0.6s var(--ease-out-expo);
}

.section-header.reveal.is-visible h4::after,
section:target .section-header h4::after {
    transform: translateX(-50%) scaleX(1);
}

.section-header .section-subtitle {
    margin-top: 1.25rem;
    font-size: clamp(0.95rem, 3vw, 1.05rem);
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
    padding: 0 0.25rem;
}

/* About */
.aboutme-container {
    display: flex;
    gap: clamp(1.5rem, 4vw, 2.5rem);
    align-items: center;
    min-width: 0;
}

.about-content {
    flex: 2;
}

.about-image {
    flex: 1;
    position: relative;
    min-height: 320px;
}

.decoration-circle {
    position: absolute;
    width: min(280px, 70vw);
    height: min(280px, 70vw);
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(91, 92, 246, 0.15), rgba(6, 182, 212, 0.1));
    top: 2rem;
    right: 0;
    animation: rotateSlow 28s linear infinite;
}

@keyframes rotateSlow {
    to {
        transform: rotate(360deg);
    }
}

.decoration-dots {
    position: absolute;
    width: 140px;
    height: 140px;
    background-image: radial-gradient(var(--primary) 2px, transparent 2px);
    background-size: 18px 18px;
    bottom: 0;
    left: 0;
    animation: floatY 5s ease-in-out infinite alternate;
}

@keyframes floatY {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(14px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .decoration-circle,
    .decoration-dots {
        animation: none;
    }
}

.skills-section {
    margin: 2rem 0;
}

.skills-section h5 {
    margin-bottom: 1.25rem;
    color: var(--text-body);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 92px), 1fr));
    gap: clamp(0.65rem, 2vw, 0.85rem);
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
    padding: 1.1rem 0.75rem;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter);
    -webkit-backdrop-filter: var(--glass-filter);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-stroke);
    box-shadow: var(--glass-highlight), var(--glass-shadow);
    transition: transform 0.3s var(--ease-spring), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-theme);
}

.skill-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-sheen);
    opacity: 0.45;
    pointer-events: none;
    z-index: 0;
}

.skill-item > * {
    position: relative;
    z-index: 1;
}

.skill-item:hover {
    transform: translateY(-6px);
    border-color: rgba(91, 92, 246, 0.22);
    box-shadow:
        var(--glass-highlight),
        0 12px 36px rgba(91, 92, 246, 0.12),
        0 4px 16px rgba(15, 23, 42, 0.08);
    background: var(--glass-surface-raised);
}

.skill-item i {
    font-size: 1.85rem;
    color: var(--primary);
}

.skill-item span {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-body);
}

@media (max-width: 768px) {
    .aboutme-container {
        flex-direction: column;
    }

    .about-image {
        min-height: 220px;
        width: 100%;
    }
}

/* Projects */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: clamp(1.15rem, 3vw, 1.75rem);
    width: 100%;
    min-width: 0;
}

.project-card {
    position: relative;
    isolation: isolate;
    background: var(--glass-surface-raised);
    backdrop-filter: var(--glass-filter);
    -webkit-backdrop-filter: var(--glass-filter);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--glass-stroke);
    box-shadow: var(--glass-highlight), var(--glass-shadow);
    transition: transform 0.35s var(--ease-out-expo), box-shadow 0.35s var(--ease-out-expo), border-color var(--transition-fast), background-color var(--transition-theme);
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-sheen);
    opacity: 0.35;
    pointer-events: none;
    z-index: 0;
}

.project-card > * {
    position: relative;
    z-index: 1;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(91, 92, 246, 0.2);
    box-shadow:
        var(--glass-highlight),
        0 20px 48px rgba(15, 23, 42, 0.12),
        0 8px 24px rgba(91, 92, 246, 0.1);
    background: var(--glass-hover-bright);
}

.project-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 0;
    min-width: 0;
}

@media (max-width: 768px) {
    .project-card--featured {
        grid-template-columns: 1fr;
    }
}

.project-image {
    position: relative;
    min-height: 220px;
    overflow: hidden;
    background: var(--bg-image-placeholder);
}

.project-card--featured .project-image {
    min-height: 280px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: transform 0.55s var(--ease-out-expo);
    padding: 12px;
}

.project-card:hover .project-image img {
    transform: scale(1.04);
}

.project-image--api {
    background: linear-gradient(145deg, #1e1b4b 0%, #312e81 40%, #0e7490 100%);
}

.project-image--dcs {
    background: linear-gradient(145deg, #1e1f22 0%, #3c45a5 42%, #5865f2 78%, #7289da 100%);
}

.project-visual {
    width: 100%;
    height: 100%;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.95);
}

.project-visual--ytm i {
    font-size: clamp(3rem, 8vw, 4.5rem);
    filter: drop-shadow(0 12px 32px rgba(0, 0, 0, 0.35));
    transition: transform 0.45s var(--ease-spring);
}

.project-card:hover .project-visual--ytm i {
    transform: scale(1.08);
}

.project-visual--dcs i {
    font-size: clamp(3rem, 8vw, 4.5rem);
    filter: drop-shadow(0 12px 32px rgba(0, 0, 0, 0.35));
    transition: transform 0.45s var(--ease-spring);
}

.project-card:hover .project-visual--dcs i {
    transform: scale(1.08);
}

.project-visual-badge {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.38);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
}

.placeholder-image {
    width: 100%;
    height: 100%;
    min-height: 220px;
    background: var(--bg-image-placeholder-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-image-placeholder);
    font-size: 2.5rem;
}

.placeholder-image--soft {
    background: linear-gradient(145deg, rgba(91, 92, 246, 0.85), rgba(124, 58, 237, 0.75));
}

.project-links {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.3s var(--ease-out-expo), transform 0.3s var(--ease-out-expo);
}

.project-links--static {
    opacity: 1;
    transform: none;
}

.project-card:hover .project-links:not(.project-links--static) {
    opacity: 1;
    transform: translateY(0);
}

.project-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.42);
    border: 1px solid rgba(255, 255, 255, 0.45);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(14px) saturate(180%);
    -webkit-backdrop-filter: blur(14px) saturate(180%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-project-link);
    transition: background-color var(--transition-fast), color var(--transition-fast), transform 0.25s var(--ease-spring), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.project-link:hover {
    background: var(--bg-project-link-hover);
    color: var(--text-project-link-hover);
    transform: scale(1.08);
}

.project-link--inactive {
    pointer-events: none;
    opacity: 0.85;
}

.project-info {
    padding: clamp(1.1rem, 3vw, 1.35rem) clamp(1rem, 3.5vw, 1.5rem) 1.5rem;
    min-width: 0;
}

.project-tags {
    display: flex;
    gap: 0.45rem;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-tag);
    color: var(--text-tag);
    padding: 0.28rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px) saturate(160%);
    -webkit-backdrop-filter: blur(10px) saturate(160%);
}

.project-info h5 {
    font-size: 1.3rem;
    margin-bottom: 0.65rem;
    color: var(--text-body);
}

.project-info p {
    margin-bottom: 1.15rem;
    font-size: 0.98rem;
    line-height: 1.6;
}

.project-details {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    transition: gap 0.3s var(--ease-out-expo), color var(--transition-fast);
}

.project-details:hover {
    gap: 0.75rem;
    color: var(--primary-dark);
}

.project-details--muted {
    color: var(--text-muted);
    font-weight: 500;
    pointer-events: none;
}

.center-button {
    display: flex;
    justify-content: center;
    margin-top: 2.5rem;
}

/* Contact */
.contact-layout {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 148px), 1fr));
    gap: clamp(0.85rem, 2.5vw, 1.15rem);
}

.info-card {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter);
    -webkit-backdrop-filter: var(--glass-filter);
    padding: 1.5rem 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-stroke);
    box-shadow: var(--glass-highlight), var(--glass-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s var(--ease-spring), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-theme);
}

.info-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-sheen);
    opacity: 0.38;
    pointer-events: none;
    z-index: 0;
}

.info-card > * {
    position: relative;
    z-index: 1;
}

.info-card:hover {
    transform: translateY(-4px);
    border-color: rgba(91, 92, 246, 0.18);
    box-shadow:
        var(--glass-highlight),
        0 14px 40px rgba(15, 23, 42, 0.1),
        0 4px 14px rgba(91, 92, 246, 0.08);
    background: var(--glass-surface-raised);
}

.info-card--link {
    color: inherit;
    cursor: pointer;
    text-decoration: none;
}

.info-card--link > p {
    color: var(--text-muted);
}

.info-card--link:hover {
    border-color: rgba(91, 92, 246, 0.25);
}

.info-card--link:hover h5,
.info-card--link:hover p {
    color: var(--primary);
}

.info-card i {
    font-size: 1.75rem;
    color: var(--primary);
    margin-bottom: 0.85rem;
}

.info-card h5 {
    margin-bottom: 0.35rem;
    color: var(--text-body);
}

.info-card p {
    font-size: 0.92rem;
    margin-bottom: 0;
}

.social-section {
    margin-top: 2.75rem;
    text-align: center;
}

.social-section h5 {
    margin-bottom: 1.25rem;
    color: var(--text-body);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link {
    font-size: 1.45rem;
    color: var(--text-muted);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-stroke);
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter-soft);
    -webkit-backdrop-filter: var(--glass-filter-soft);
    box-shadow: var(--glass-highlight), 0 4px 16px rgba(15, 23, 42, 0.06);
    transition: transform 0.25s var(--ease-spring), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-theme);
}

.social-link:hover {
    color: var(--primary);
    transform: translateY(-3px);
    background: var(--glass-surface-raised);
    border-color: rgba(91, 92, 246, 0.22);
    box-shadow: var(--glass-highlight), 0 10px 28px rgba(91, 92, 246, 0.12);
}

/* Footer */
footer {
    background: linear-gradient(180deg, #0f172a 0%, #020617 100%);
    color: var(--palette-light);
    padding: 3rem var(--page-gutter) calc(1.75rem + env(safe-area-inset-bottom, 0px));
    margin-top: 2rem;
    max-width: 100%;
    box-sizing: border-box;
}

.footer-content {
    max-width: var(--content-max);
    margin: 0 auto 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
}

.footer-logo h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.65rem;
    color: var(--palette-light);
    margin-bottom: 0.45rem;
}

.footer-logo h3 span {
    color: var(--palette-accent);
}

.footer-logo p {
    color: #94a3b8;
    max-width: 280px;
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    gap: 2.5rem;
}

.links-column h5 {
    font-size: 1rem;
    color: var(--palette-light);
    margin-bottom: 0.85rem;
}

.links-column a {
    display: block;
    color: #94a3b8;
    margin-bottom: 0.45rem;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.links-column a:hover {
    color: var(--palette-accent);
    transform: translateX(4px);
}

.footer-bottom {
    max-width: var(--content-max);
    margin: 0 auto;
    padding-top: 1.75rem;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: clamp(0.8rem, 2.8vw, 0.88rem);
    color: #94a3b8;
}

.footer-social a {
    color: #94a3b8;
    margin-left: 1rem;
    font-size: 1.2rem;
    transition: color var(--transition-fast), transform 0.2s var(--ease-spring);
}

.footer-social a:hover {
    color: var(--palette-accent);
    transform: translateY(-2px);
}

/* Theme switch */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--glass-surface);
    backdrop-filter: var(--glass-filter-soft);
    -webkit-backdrop-filter: var(--glass-filter-soft);
    transition: background-color 0.45s var(--ease-out-expo), box-shadow 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
    border-radius: 28px;
    border: 1px solid var(--glass-stroke);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.slider-knob {
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    top: 50%;
    margin-top: -11px;
    background: rgba(255, 255, 255, 0.95);
    transition: transform 0.45s var(--ease-spring), box-shadow 0.3s ease;
    border-radius: 50%;
    z-index: 2;
    box-shadow:
        0 2px 8px rgba(15, 23, 42, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.65);
}

.theme-switch input:checked + .slider {
    background: linear-gradient(135deg, rgba(91, 92, 246, 0.92), rgba(124, 58, 237, 0.88));
    backdrop-filter: blur(8px) saturate(160%);
    -webkit-backdrop-filter: blur(8px) saturate(160%);
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.theme-switch input:focus-visible + .slider {
    box-shadow: 0 0 0 3px rgba(91, 92, 246, 0.35);
}

.theme-switch input:checked + .slider .slider-knob {
    transform: translateX(24px);
}

.slider .icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    z-index: 1;
    transition: opacity 0.35s ease, color 0.35s ease;
    pointer-events: none;
}

.slider .icon.sun {
    left: 7px;
    color: #f59e0b;
    opacity: 1;
}

.slider .icon.moon {
    right: 7px;
    color: #64748b;
    opacity: 0.45;
}

.theme-switch input:checked + .slider .icon.sun {
    opacity: 0.35;
}

.theme-switch input:checked + .slider .icon.moon {
    color: rgba(255, 255, 255, 0.95);
    opacity: 1;
}

/* Dark mode */
body.dark-mode {
    --primary: #818cf8;
    --primary-dark: #6366f1;
    --secondary: #a78bfa;

    --glass-hover-bright: rgba(44, 50, 78, 0.82);
    --glass-surface: rgba(22, 26, 42, 0.58);
    --glass-surface-raised: rgba(34, 40, 62, 0.68);
    --glass-stroke: rgba(255, 255, 255, 0.1);
    --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.14);
    --glass-shadow: 0 14px 44px rgba(0, 0, 0, 0.45), 0 4px 18px rgba(0, 0, 0, 0.32);
    --glass-sheen: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 42%, rgba(255, 255, 255, 0.04) 100%);

    --bg-body: #0b0f1a;
    --text-body: #e2e8f0;
    --text-muted: #94a3b8;
    --bg-header: rgba(15, 23, 42, 0.75);
    --bg-card: #151b2e;
    --bg-skill-item: #1a2235;
    --bg-image-placeholder: #1e293b;
    --bg-image-placeholder-gradient: linear-gradient(135deg, #4f46e5, #7c3aed, #0891b2);
    --text-image-placeholder: #f1f5f9;
    --bg-project-link: rgba(255, 255, 255, 0.1);
    --text-project-link: var(--primary);
    --bg-project-link-hover: var(--primary);
    --text-project-link-hover: #0f172a;
    --bg-tag: rgba(129, 140, 248, 0.18);
    --text-tag: #c7d2fe;
    --color-link: var(--primary);
    --color-logo-base: #f1f5f9;
    --color-logo-accent: var(--primary);
    --color-nav-link: #e2e8f0;
    --color-nav-link-hover: var(--primary);
    --bg-nav-link-hover: rgba(129, 140, 248, 0.12);
    --section-header-underline: linear-gradient(90deg, var(--primary), #22d3ee);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 28px 64px rgba(0, 0, 0, 0.55);
}

body.dark-mode .site-header {
    border-bottom-color: rgba(148, 163, 184, 0.12);
}

body.dark-mode .page-bg {
    background:
        radial-gradient(ellipse 90% 55% at 50% -15%, rgba(99, 102, 241, 0.28), transparent 55%),
        radial-gradient(ellipse 65% 45% at 100% 5%, rgba(6, 182, 212, 0.14), transparent 50%),
        radial-gradient(ellipse 55% 40% at 0% 95%, rgba(167, 139, 250, 0.14), transparent 50%),
        radial-gradient(ellipse 70% 50% at 75% 80%, rgba(56, 189, 248, 0.06), transparent 45%),
        linear-gradient(180deg, #121a2c 0%, var(--bg-body) 42%, #0d1524 100%);
}

body.dark-mode .slider {
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

body.dark-mode .slider-knob {
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(255, 255, 255, 0.35);
}

body.dark-mode nav a:hover {
    border-color: rgba(255, 255, 255, 0.16);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

body.dark-mode .tag {
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

body.dark-mode .glow {
    background: radial-gradient(circle, rgba(129, 140, 248, 0.35) 0%, rgba(34, 211, 238, 0.1) 45%, transparent 70%);
}

body.dark-mode .project-card,
body.dark-mode .skill-item,
body.dark-mode .info-card {
    border-color: rgba(148, 163, 184, 0.1);
}

body.dark-mode .button.secondary {
    border-color: rgba(129, 140, 248, 0.35);
    color: var(--primary);
}

body.dark-mode .button.secondary:hover {
    background: rgba(129, 140, 248, 0.12);
}

/* --- Responsywność: wąskie okna, telefony, dotyk --- */
main {
    width: 100%;
    max-width: 100vw;
    min-width: 0;
    overflow-x: clip;
}

.contact-layout {
    width: 100%;
    min-width: 0;
}

/* Linki projektu zawsze widoczne na urządzeniach dotykowych (brak hover) */
@media (hover: none) and (pointer: coarse) {
    .project-card:hover {
        transform: none;
    }

    .project-links:not(.project-links--static) {
        opacity: 1;
        transform: none;
    }

    .project-card:active .project-image img,
    .project-card:active .project-visual--ytm i,
    .project-card:active .project-visual--dcs i {
        transform: scale(1.02);
    }
}

@media (max-width: 600px) {
    .theme-switch-wrapper {
        gap: 0.35rem;
    }

    .controls-container {
        gap: 0.4rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        max-width: 22rem;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons .button {
        width: 100%;
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .footer-social a:first-child {
        margin-left: 0;
    }

    .project-info p {
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .info-card p {
        overflow-wrap: anywhere;
        word-break: break-word;
    }
}

@media (max-width: 480px) {
    :root {
        --section-y: clamp(2rem, 8vw, 3rem);
    }

    .section-hero {
        flex-direction: column;
        padding-left: max(0.65rem, env(safe-area-inset-left, 0px));
        padding-right: max(0.65rem, env(safe-area-inset-right, 0px));
    }

    .avatar {
        width: min(260px, 78vw);
        height: min(260px, 78vw);
    }

    .glow {
        width: min(300px, 92vw);
        height: min(300px, 92vw);
    }

    .project-image,
    .project-visual,
    .placeholder-image {
        min-height: 180px;
    }

    .project-card--featured .project-image {
        min-height: 200px;
    }

    .project-visual--ytm i,
    .project-visual--dcs i {
        font-size: clamp(2.5rem, 14vw, 3.5rem);
    }

    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .skill-item {
        padding: 0.85rem 0.5rem;
    }

    .skill-item span {
        font-size: 0.75rem;
        text-align: center;
        line-height: 1.2;
    }

    .skill-item i {
        font-size: 1.55rem;
    }

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

    .social-links {
        flex-wrap: wrap;
    }
}

@media (max-width: 380px) {
    .tag {
        font-size: 0.65rem;
        padding: 0.22rem 0.55rem;
    }

    .section-header h4::after {
        width: 56px;
    }
}

/* Bardzo niskie ekrany (np. landscape na telefonie) */
@media (max-height: 520px) and (orientation: landscape) {
    .section-hero {
        min-height: auto;
        padding-top: calc(4rem + env(safe-area-inset-top, 0px));
        padding-bottom: 1.5rem;
    }

    .hero-image {
        min-height: 160px;
    }

    .avatar {
        width: min(200px, 40vh);
        height: min(200px, 40vh);
    }
}

/* Mniej przezroczystości / rozmycia — dostępność (np. iOS „Reduce Transparency”) */
@media (prefers-reduced-transparency: reduce) {
    .site-header,
    .skill-item,
    .project-card,
    .info-card,
    .social-link,
    .button.secondary,
    .slider,
    nav a:hover,
    .menu-toggle:hover,
    .tag,
    .project-link,
    .project-visual-badge,
    nav.active,
    .theme-switch input:checked + .slider {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    :root {
        --glass-surface: rgba(255, 255, 255, 0.92);
        --glass-surface-raised: rgba(255, 255, 255, 0.97);
        --glass-hover-bright: #ffffff;
    }

    body.dark-mode {
        --glass-surface: rgba(30, 36, 56, 0.96);
        --glass-surface-raised: rgba(40, 46, 72, 0.98);
        --glass-hover-bright: rgba(48, 54, 82, 0.95);
    }

    .skill-item::before,
    .project-card::before,
    .info-card::before {
        opacity: 0.12;
    }
}