/* Mobile First Design - Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #000000;
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 15px;
}

/* Typography - Mobile First */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

/* Header - Mobile First */
header {
    padding: 0.8rem 0;
    background-color: rgba(0, 0, 0, 0.9);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #333;
    backdrop-filter: blur(10px);
}

.logo-small {
    opacity: 0;
    transition: opacity 0.3s ease;
    text-align: center;
}

.logo-small.visible {
    opacity: 1;
}

.logo-small img {
    height: 30px;
    width: auto;
    filter: invert(1);
}

/* Hero Section - Mobile First */
.hero {
    padding: 60px 0 30px;
    text-align: center;
    background: linear-gradient(180deg, #000000 0%, #111111 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-logo {
    margin-bottom: 1.5rem;
    animation: fadeIn 1s ease-out;
}

.hero-logo img {
    width: 200px;
    max-width: 70%;
    height: auto;
    filter: invert(1);
    animation: pulse 3s ease-in-out infinite;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 300;
    color: #ffffff;
    animation: fadeIn 1s ease-out 0.3s;
    animation-fill-mode: both;
    letter-spacing: 0.02em;
    padding: 0 20px;
}

/* Signature Showcase - Mobile First */
.signature-showcase {
    padding: 0;
    background-color: #000;
}

.container-fluid {
    padding: 0;
    max-width: 100%;
}

.showcase-wrapper {
    display: block;
}

.showcase-side {
    position: relative;
    overflow: hidden;
    height: 50vh;
    min-height: 350px;
    margin-bottom: 2px;
}

.red-side {
    background-color: #8B0000;
}

.blue-side {
    background-color: #000080;
}

.showcase-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Smaller, minimal overlay for mobile */
.showcase-info {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 10;
    background: rgba(0,0,0,0.6);
    padding: 0.5rem 1.5rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 20px;
    width: 200px;
}

.showcase-info h3 {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 0.1rem;
    color: #fff;
}

.showcase-info p {
    font-size: 0.7rem;
    color: #ddd;
    font-style: italic;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Slider Dots - Mobile */
.slider-dots {
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 10;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background-color: #fff;
    transform: scale(1.3);
}

/* Section Styles - Mobile First */
.section {
    padding: 30px 0;
}

.section:nth-child(even) {
    background-color: #0a0a0a;
}

/* What is HE@DSUP - Mobile */
.what-is {
    text-align: center;
    padding: 25px 0;
}

.intro-text {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    color: #e0e0e0;
    padding: 0 10px;
}

.philosophy {
    font-size: 0.85rem;
    color: #999999;
    font-style: italic;
    padding: 0 10px;
}

/* Our Story - Mobile */
.our-story {
    background-color: #050505;
    padding: 25px 0;
}

.story-text {
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: center;
    color: #cccccc;
    padding: 0 10px;
}

/* Booths Section - Mobile */
.booth-grid {
    display: block;
    padding: 0 10px;
}

.booth-card {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid #333;
    padding: 25px 20px;
    text-align: center;
    margin-bottom: 15px;
    border-radius: 8px;
}

.booth-number {
    font-size: 1.8rem;
    font-weight: 900;
    color: #333;
    margin-bottom: 0.5rem;
    font-family: 'Bebas Neue', sans-serif;
}

.booth-card h3 {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.3rem;
}

.booth-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.booth-card p {
    color: #999;
    font-style: italic;
    font-size: 0.85rem;
}

.booth-note {
    text-align: center;
    font-size: 0.9rem;
    color: #999;
    padding: 0 15px;
    margin-top: 15px;
}

/* How It Works - Mobile */
.how-it-works {
    background-color: #000;
    padding: 25px 0;
}

.steps {
    display: block;
    padding: 0 15px;
}

.step {
    text-align: center;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.step-number {
    display: inline-block;
    width: 35px;
    height: 35px;
    line-height: 35px;
    font-size: 1rem;
    font-weight: 900;
    border: 2px solid #fff;
    border-radius: 50%;
    flex-shrink: 0;
}

.step p {
    font-size: 0.9rem;
    color: #ccc;
    text-align: left;
    flex: 1;
}

.qr-info {
    text-align: center;
    font-size: 0.9rem;
    color: #999;
    background-color: #111;
    padding: 1.2rem 15px;
    border-radius: 8px;
    margin: 15px 15px 0;
}

/* Tips Section - Mobile */
.tips {
    background-color: #0a0a0a;
    padding: 25px 0;
}

.tips-content {
    padding: 0 15px;
}

.tips-content h3 {
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
    color: #fff;
}

.tips-list {
    list-style: none;
    margin-bottom: 1.2rem;
}

.tips-list li {
    font-size: 0.9rem;
    color: #ccc;
    margin-bottom: 0.7rem;
    padding-left: 20px;
    position: relative;
}

.tips-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #666;
    font-weight: bold;
}

.tips-list li.highlight {
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 0.8rem;
}

.pro-tip {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid #333;
    padding: 1.2rem;
    border-radius: 8px;
    text-align: center;
    margin-top: 1.2rem;
}

.pro-tip p {
    font-size: 0.9rem;
    color: #ccc;
}

.pro-tip span {
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    display: block;
    margin: 0.6rem 0;
    font-style: italic;
}

/* Samples Section - Mobile */
.samples {
    text-align: center;
    background-color: #000;
    padding: 25px 0;
}

.samples-text {
    font-size: 0.95rem;
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 2rem;
    padding: 0 15px;
}

/* Sample Categories - Mobile */
.sample-categories {
    margin-top: 1.5rem;
}

.sample-category {
    margin-bottom: 2.5rem;
}

.category-title {
    font-size: 1.3rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
    color: #fff;
    text-align: center;
}

.category-desc {
    font-size: 0.85rem;
    color: #999;
    text-align: center;
    margin-bottom: 1rem;
    font-style: italic;
    padding: 0 15px;
}

.sample-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 0 15px;
}

.sample-grid img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    filter: brightness(0.9);
    border-radius: 5px;
}

/* CTA Section - Mobile */
.cta {
    background: linear-gradient(180deg, #000000 0%, #111111 100%);
    padding: 40px 0;
    text-align: center;
}

.cta-title {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.03em;
    background: linear-gradient(45deg, #ffffff 0%, #cccccc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 0 15px;
    animation: pulse 2s ease-in-out infinite;
}

/* Location Section - Mobile */
.location {
    background-color: #050505;
    padding: 25px 0;
}

.location-content {
    display: block;
}

.address-info {
    text-align: center;
    margin-bottom: 25px;
    padding: 0 15px;
}

.address-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: #fff;
}

.address {
    font-size: 0.9rem;
    color: #ccc;
    line-height: 1.5;
    margin-bottom: 1.2rem;
}

.location-tips {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid #333;
    padding: 1.2rem;
    border-radius: 8px;
    margin: 0 auto;
    max-width: 300px;
}

.location-tips h4 {
    font-size: 0.95rem;
    margin-bottom: 0.6rem;
    color: #fff;
}

.location-tips ul {
    list-style: none;
}

.location-tips li {
    color: #999;
    margin-bottom: 0.4rem;
    padding-left: 18px;
    position: relative;
    font-size: 0.85rem;
}

.location-tips li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #666;
}

.map-container {
    background: #000;
    border: 1px solid #333;
    border-radius: 8px;
    overflow: hidden;
    margin: 0 15px;
    height: 250px;
}

.map-container iframe {
    filter: grayscale(100%) invert(100%);
    opacity: 0.8;
    height: 100%;
}

/* Footer - Mobile */
footer {
    background-color: #000;
    padding: 1.2rem 0;
    text-align: center;
    border-top: 1px solid #333;
}

footer p {
    color: #666;
    font-size: 0.75rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

/* Desktop overrides - only for screens larger than 768px */
@media (min-width: 769px) {
    .container {
        max-width: 1200px;
        padding: 0 20px;
    }
    
    .section-title {
        font-size: 3rem;
        margin-bottom: 3rem;
    }
    
    .hero {
        padding: 100px 0 80px;
    }
    
    .hero-logo img {
        width: 400px;
        max-width: 80%;
    }
    
    .hero-subtitle {
        font-size: 2.5rem;
    }
    
    .showcase-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    
    .showcase-side {
        height: 80vh;
        margin-bottom: 0;
    }
    
    .showcase-info {
        bottom: 40px;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        padding: 1rem 2rem;
        background: rgba(0,0,0,0.6);
        width: 280px;
    }
    
    .showcase-info h3 {
        font-size: 1.4rem;
        margin-bottom: 0.2rem;
    }
    
    .showcase-info p {
        font-size: 0.9rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .slider-dots {
        bottom: 30px;
        gap: 10px;
    }
    
    .dot {
        width: 12px;
        height: 12px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .intro-text {
        font-size: 1.25rem;
        max-width: 800px;
        margin: 0 auto 2rem;
    }
    
    .philosophy {
        font-size: 1.1rem;
        max-width: 700px;
    }
    
    .story-text {
        font-size: 1.15rem;
        max-width: 800px;
        margin: 0 auto;
    }
    
    .booth-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .booth-card {
        padding: 40px 30px;
    }
    
    .booth-number {
        font-size: 3rem;
    }
    
    .steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 40px;
    }
    
    .step {
        display: block;
        text-align: center;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        line-height: 60px;
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .sample-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        max-width: 1000px;
        margin: 0 auto;
    }
    
    .cta-title {
        font-size: 4rem;
    }
    
    .location-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 50px;
    }
    
    .map-container {
        height: 400px;
    }
}