/* ==========================================================================
   ZMIENNE CSS I RESET
   ========================================================================== */
:root {
    --bg-dark: #0B0F19;
    --bg-card: #111827;
    --bg-card-hover: #1F2937;
    --text-main: #F3F4F6;
    --text-muted: #9CA3AF;
    --text-white: #FFFFFF;
    
    --accent-purple: #7C3AED;
    --accent-purple-glow: rgba(124, 58, 237, 0.5);
    --accent-cyan: #06B6D4;
    --accent-cyan-glow: rgba(6, 182, 212, 0.4);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-active: rgba(124, 58, 237, 0.4);
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --nav-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ==========================================================================
   TŁO CZĄSTECZKOWE / SIATKA
   ========================================================================== */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(124, 58, 237, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(6, 182, 212, 0.1) 0%, transparent 40%),
        linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
    z-index: -1;
    pointer-events: none;
}

/* ==========================================================================
   TYPOGRAFIA I ELEMENTY BAZOWE
   ========================================================================== */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text-white);
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.25rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.85rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

p {
    color: var(--text-muted);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--nav-transition);
}

.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.section {
    padding: 5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3.5rem auto;
}

.section-tag {
    display: inline-block;
    color: var(--accent-cyan);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* ==========================================================================
   LIQUID NAVIGATION & LOGO
   ========================================================================== */
.site-header {
    position: fixed;
    top: 1rem;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    transition: var(--nav-transition);
}

.logo:hover {
    opacity: 0.8;
    transform: scale(0.98);
}

.logo img {
    height: 42px;
    width: auto;
    object-fit: contain;
    display: block;
}

.liquid-nav {
    position: relative;
    background: rgba(17, 24, 39, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.35rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav-list {
    display: flex;
    list-style: none;
    position: relative;
    z-index: 2;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 12px;
}

.nav-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.nav-link:hover {
    color: var(--text-white);
}

.nav-link.active {
    color: #000000 !important;
}

.liquid-indicator {
    position: absolute;
    top: 0;
    left: 0;
    height: 0;
    width: 0;
    background: #FFFFFF;
    border-radius: 12px;
    z-index: 1;
    transition: var(--nav-transition);
    box-shadow: 0 0 20px var(--accent-purple-glow);
    pointer-events: none;
    opacity: 0;
}

/* ==========================================================================
   PRZYCISKI (CTA)
   ========================================================================== */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--nav-transition);
}

.btn-filled {
    background: var(--accent-purple);
    color: var(--text-white);
    box-shadow: 0 4px 20px var(--accent-purple-glow);
}

.btn-filled:hover {
    background: #6D28D9;
    box-shadow: 0 6px 25px rgba(124, 58, 237, 0.7);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 15px var(--accent-cyan-glow);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* ==========================================================================
   SEKCJA 1: HERO
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
}

.hero-content {
    max-width: 750px;
}

.hero-subtitle {
    font-size: 1.15rem;
    margin: 1.5rem 0 2rem 0;
    color: var(--text-muted);
}

/* ==========================================================================
   SEKCJA 2: O MNIE
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-muted);
}

.about-text p {
    margin-bottom: 1.2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 16px;
    text-align: center;
    transition: var(--nav-transition);
}

.stat-card:hover {
    border-color: var(--border-color-active);
    transform: translateY(-4px);
}

.stat-value {
    font-size: 2rem;
    font-family: var(--font-heading);
    color: var(--accent-cyan);
    font-weight: 700;
    display: block;
    margin-bottom: 0.25rem;
}

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

/* ==========================================================================
   SEKCJA 3: UMIEJĘTNOŚCI
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    transition: var(--nav-transition);
}

.skill-card:hover {
    border-color: var(--border-color-active);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-main);
}

/* ==========================================================================
   SEKCJA 4: PROJEKTY
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--nav-transition);
}

.project-card:hover {
    border-color: var(--border-color-active);
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
}

.project-thumb {
    height: 180px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(6, 182, 212, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
}

.project-thumb svg {
    width: 48px;
    height: 48px;
    fill: var(--text-muted);
    opacity: 0.6;
}

.project-body {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.project-tags span {
    color: var(--accent-cyan);
    font-size: 0.8rem;
    font-weight: 600;
}

.project-body h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.project-body p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

/* ==========================================================================
   SEKCJA 5: USŁUGI
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--nav-transition);
}

.service-card:hover {
    border-color: var(--border-color-active);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 44px;
    height: 44px;
    background: rgba(124, 58, 237, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: var(--accent-purple);
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   SEKCJA 6: KONTAKT
   ========================================================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    background: rgba(11, 15, 25, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text-white);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--nav-transition);
}

.form-control:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 10px var(--accent-purple-glow);
    outline: none;
}

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

.form-hp {
    display: none !important;
    visibility: hidden !important;
}

/* Flash Messages */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34D399;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #F87171;
}

/* ==========================================================================
   STOPKA
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ==========================================================================
   RESPONSYWNOŚĆ (MEDIA QUERIES)
   ========================================================================== */
@media (min-width: 640px) {
    h1 { font-size: 2.75rem; }
    h2 { font-size: 2.25rem; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .about-grid { grid-template-columns: 1fr 1fr; align-items: center; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-container { grid-template-columns: 1fr 1.2fr; }
}

@media (min-width: 1024px) {
    h1 { font-size: 3.5rem; }
    .projects-grid { grid-template-columns: repeat(3, 1fr); }
    .skills-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 767px) {
    .liquid-nav {
        display: none; /* Uproszczenie na małych ekranach mobilnych */
    }
}