/* ===== NEO-BRUTALIST NEUTRINA LAB ===== */

/* Import Google Fonts - EB Garamond (elegant serif) */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500;1,600;1,700;1,800&display=swap');

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

:root {
    /* Neo-brutalist colors - LIGHT MODE with DOT GRID */
    --black: #000000;
    --white: #ffffff;
    --bg-light: #faf9f6;
    --bg-card: #ffffff;
    --accent-yellow: #ffd700;
    --accent-orange: #ff6b35;
    --accent-pink: #ff006e;
    --accent-green: #00d9a3;
    --accent-blue: #1e40af;
    --text-primary: #1a1a1a;
    --text-secondary: #1a1a1a;
    --dot-color: #d0d0d0;

    /* Brutalist borders */
    --border-thick: 4px solid var(--black);
    --border-thin: 2px solid var(--black);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'EB Garamond', 'Garamond', 'Times New Roman', serif;
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    /* Dot grid pattern - Bullet Journal style */
    background-image: radial-gradient(circle, var(--dot-color) 1.5px, transparent 1.5px);
    background-size: 24px 24px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== SMART NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: var(--border-thick);
    padding: 1rem 0;
    z-index: 1000;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--white);
    background: var(--black);
    padding: 0.3rem 0.8rem;
    border: 3px solid var(--black);
    transform: rotate(-2deg);
    box-shadow: 4px 4px 0 var(--accent-yellow);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--black);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    position: relative;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-orange);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent-orange);
    transition: width 0.3s;
}

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

/* ===== HERO SECTION ===== */
.hero {
    padding: 150px 0 100px;
    background: transparent;
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--black);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--black);
}

.highlight {
    background: var(--accent-yellow);
    color: var(--black);
    padding: 0 15px;
    transform: rotate(-1deg);
    display: inline-block;
    border: 4px solid var(--black);
    box-shadow: 8px 8px 0 var(--accent-orange);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.hero-subtitle strong {
    color: var(--black);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

/* Subject Buttons */
.subject-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.subject-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--white);
    color: var(--black);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border: 3px solid var(--black);
    transition: all 0.3s;
    position: relative;
}

.subject-btn:nth-child(1) {
    box-shadow: 6px 6px 0 var(--accent-orange);
}

.subject-btn:nth-child(2) {
    box-shadow: 6px 6px 0 var(--accent-yellow);
}

.subject-btn:nth-child(3) {
    box-shadow: 6px 6px 0 var(--accent-blue);
}

.subject-btn:hover {
    transform: translate(-3px, -3px);
}

.subject-btn:nth-child(1):hover {
    box-shadow: 9px 9px 0 var(--accent-orange);
}

.subject-btn:nth-child(2):hover {
    box-shadow: 9px 9px 0 var(--accent-yellow);
}

.subject-btn:nth-child(3):hover {
    box-shadow: 9px 9px 0 var(--accent-blue);
}

/* ===== SECTIONS ===== */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 6px;
    background: var(--accent-orange);
    margin: 1rem auto 0;
}

/* ===== ABOUT SECTION ===== */
.about {
    background: transparent;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.3rem;
    line-height: 1.9;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--accent-orange);
    font-weight: 800;
}

/* ===== MATERIALS SECTION ===== */
.materials {
    background: transparent;
}

.subject-group {
    margin-bottom: 4rem;
    text-align: right;
}

.subject-heading {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 2.5rem;
    display: inline-block;
    background: var(--white);
    color: var(--black);
    padding: 0.8rem 1.5rem;
    border: 4px solid var(--black);
    transform: rotate(-1deg);
    position: relative;
}

#fizyka .subject-heading {
    box-shadow: 8px 8px 0 var(--accent-orange);
}

#matematyka .subject-heading {
    box-shadow: 8px 8px 0 var(--accent-yellow);
}

#informatyka .subject-heading {
    box-shadow: 8px 8px 0 var(--accent-blue);
}

.materials-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.material-card {
    background: var(--bg-card);
    border: var(--border-thick);
    padding: 2rem;
    position: relative;
    transition: border-color 0.3s ease;
}

.material-card::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: -8px;
    bottom: -8px;
    background: var(--accent-green);
    z-index: -1;
    transition: opacity 0.3s ease;
    opacity: 0.4;
}

/* Different shadow colors per subject */
#fizyka .material-card::before {
    background: var(--accent-orange);
}

#matematyka .material-card::before {
    background: var(--accent-yellow);
}

#informatyka .material-card::before {
    background: var(--accent-blue);
}

/* Special cards (like competitions) always use blue */
.material-card.special-card::before {
    background: var(--accent-blue) !important;
}

/* Hover effect - subtle shadow intensification */
.material-card:hover::before {
    opacity: 1;
}

.card-header {
    margin-bottom: 1rem;
}

.card-tag {
    display: inline-block;
    background: var(--accent-pink);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    font-weight: 700;
    font-size: 0.9rem;
    border: 2px solid var(--black);
}

.card-tag-special {
    background: var(--accent-blue);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.card-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    color: var(--black);
}

.card-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.card-links {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.card-link {
    display: inline-block;
    color: var(--accent-orange);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.card-link:hover {
    text-decoration: underline;
}

/* ===== CONTACT SECTION ===== */
.contact {
    background: transparent;
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-btn {
    display: inline-block;
    background: var(--black);
    color: var(--white);
    padding: 1.2rem 2.5rem;
    font-size: 1.3rem;
    font-weight: 900;
    text-decoration: none;
    border: 4px solid var(--black);
    box-shadow: 10px 10px 0 var(--accent-yellow);
    transition: all 0.3s;
}

.contact-btn:hover {
    transform: translate(-5px, -5px);
    box-shadow: 15px 15px 0 var(--accent-yellow);
}

/* ===== NEUTRINO FACTS SLIDER ===== */
.neutrino-facts {
    background: var(--bg-light);
    padding: 80px 0;
}

.slider-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.slider-wrapper {
    background: var(--bg-card);
    border: var(--border-thick);
    padding: 3rem;
    min-height: 300px;
    position: relative;
    box-shadow: 10px 10px 0 var(--accent-blue);
}

.slide {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.slide.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-content {
    text-align: center;
}

.slide-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: var(--accent-blue);
}

.slide-text {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 2.5rem;
}

.slider-btn {
    background: var(--black);
    color: var(--white);
    border: 3px solid var(--black);
    padding: 0.8rem 1.5rem;
    font-size: 1.5rem;
    font-weight: 900;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'EB Garamond', serif;
}

.slider-btn:hover {
    background: var(--accent-blue);
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: 0.8rem;
}

.dot {
    width: 15px;
    height: 15px;
    background: var(--bg-light);
    border: 3px solid var(--black);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: var(--accent-blue);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--accent-yellow);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--black);
    border-top: var(--border-thick);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: var(--white);
    font-size: 1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero-greeting {
        font-size: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .subject-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .subject-btn {
        width: 100%;
        text-align: center;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 1rem;
    }

    .materials-grid {
        max-width: 100%;
    }

    .contact-btn {
        font-size: 1.1rem;
        padding: 1rem 2rem;
    }

    /* Slider responsive */
    .slider-wrapper {
        padding: 2rem 1.5rem;
        min-height: 350px;
        box-shadow: 6px 6px 0 var(--accent-blue);
    }

    .slide-title {
        font-size: 1.8rem;
    }

    .slide-text {
        font-size: 1.1rem;
    }

    .slider-btn {
        padding: 0.6rem 1.2rem;
        font-size: 1.3rem;
    }

    .slider-controls {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-greeting {
        font-size: 1.5rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .highlight {
        padding: 0 10px;
    }

    .nav-brand {
        font-size: 1.5rem;
    }

    .subject-btn {
        font-size: 1rem;
        padding: 0.7rem 1.2rem;
    }

    /* Slider mobile */
    .slider-wrapper {
        padding: 1.5rem 1rem;
        min-height: 400px;
    }

    .slide-title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .slide-text {
        font-size: 1rem;
        line-height: 1.6;
    }

    .slider-btn {
        padding: 0.5rem 1rem;
        font-size: 1.2rem;
    }

    .dot {
        width: 12px;
        height: 12px;
        border-width: 2px;
    }
}