:root {
    --dark-bg: #0a0a0f;
    --dark-blue: #0d1b2a;
    --emerald: #1b6b6b;
    --accent-red: #ff2a6d;
    --accent-white: #e6f1ff;
    --glow-color: rgba(27, 107, 107, 0.7);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--accent-white);
    line-height: 1.6;
    padding: 20px;
    margin-top: 80px;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(27, 107, 107, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 42, 109, 0.1) 0%, transparent 20%);
}

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

.photo-frame {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 30px;
    border: 2px solid var(--emerald);
    border-radius: 4px;
    padding: 10px;
    background-color: var(--dark-blue);
    box-shadow: 0 0 15px var(--glow-color);
    transition: transform 0.3s ease;
}


.photo-frame img {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(30%) contrast(110%);
}

.image-box {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    height: 200px;
    border: 1px solid var(--emerald);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 0 10px var(--glow-color);
    transition: transform 0.3s ease;
}

.image-desktop, 
.image-mobile {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: sepia(20%) contrast(110%);
}

.image-desktop { 
    display: block; 
}

.image-mobile { 
    display: none; 
}

@media (max-width: 768px) {
    .image-desktop { 
        display: none; 
    }
    
    .image-mobile { 
        display: block; 
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.3rem;
    }
    
    
    .multiply-sign {
        transform: rotate(90deg);
        margin: 10px 0;
    }
    
    .image-box {
        max-width: 250px;
    }
}
.photo-frame .image-box {
    height: auto;
    max-width: 100%;
    position: relative;
}

.photo-frame .image-desktop,
.photo-frame .image-mobile {
    position: relative;
    height: auto;
    object-fit: contain;
}

.photo-frame .image-desktop { 
    display: block; 
}

.photo-frame .image-mobile { 
    display: none; 
}

@media (max-width: 768px) {
    .photo-frame .image-desktop { 
        display: none; 
    }
    
    .photo-frame .image-mobile { 
        display: block; 
    }
}

.main-title {
    font-family: "Russo One";
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--accent-white);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--glow-color);
    position: relative;
    padding-bottom: 10px;
}

.main-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--emerald), transparent);
}

.subtitle {
    font-family: 'Russo One';
    font-size: 2rem;
    margin-bottom: 20px;
    color: #44cfcf;
    text-align: center;
    font-weight: 300;
    letter-spacing: 1px;
}

.content-block {
    margin-bottom: 25px;
    padding: 25px;
    background: linear-gradient(135deg, rgba(13, 27, 42, 0.9), rgba(27, 107, 107, 0.2));
    border: 1px solid var(--emerald);
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4), 0 0 20px var(--glow-color);
    position: relative;
    overflow: hidden;
}

.content-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-red), var(--emerald), var(--accent-red));
}

.text-item {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 8px;
    background: rgba(10, 10, 15, 0.6);
    border-left: 4px solid;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}



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

.text-emerald {
    border-left-color: var(--emerald);
    color: #59d3d3;
    background: rgba(27, 107, 107, 0.1);
}

.text-red {
    border-left-color: var(--accent-red);
    color: var(--accent-red);
    background: rgba(255, 42, 109, 0.1);
}

.text-white {
    border-left-color: var(--accent-white);
    color: var(--accent-white);
    background: rgba(230, 241, 255, 0.05);
}

.text-cyan {
    border-left-color: #00d4ff;
    color: #00d4ff;
    background: rgba(0, 212, 255, 0.1);
}

.content-list {
    margin-bottom: 30px;
    padding-left: 20px;
}

.content-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.content-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-red);
    font-weight: bold;
}


.image-comparison {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 40px 0;
    gap: 20px;
    flex-wrap: wrap;
}

.image-box {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    border: 1px solid var(--emerald);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 0 10px var(--glow-color);
    transition: transform 0.3s ease;
}


.image-box img {
    width: 100%;
    height: auto;
    display: block;
    filter: sepia(20%) contrast(110%);
}

.add-image-box {
    flex: 1;
    max-width: 200px;
    max-height: 200px;
    border-radius: 4px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.add-image-box img {
    width: 200px;
    height: 200px;
    display: block;
}


.multiply-sign {
    font-size: 7rem;
    color: var(--accent-red);
    text-shadow: 0 0 10px rgba(255, 42, 109, 0.7);
    margin: 0 15px;
}

.additional-text {
    margin-top: 30px;
    padding: 20px;
    background-color: rgba(13, 27, 42, 0.7);
    border: 1px solid var(--emerald);
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.additional-text::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-red), var(--emerald));
}


@media (max-width: 768px) {
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.3rem;
    }
    

    .content-block {
        padding: 20px;
        border-radius: 10px;
    }
    
    .text-item {
        padding: 12px;
        margin-bottom: 15px;
    }
}

@media (max-width: 600px) {
    .image-comparison {
        flex-direction: column;
    }
    
    .multiply-sign {
        transform: rotate(90deg);
        margin: 10px 0;
    }
    
    .image-box {
        max-width: 250px;
    }
}


@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .main-title {
        font-size: 1.7rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .multiply-sign {
        font-size: 4rem;
    }
    
    .image-box {
        min-width: 150px;
    }
    
    .additional-text {
        padding: 12px;
    }
    
    .content-block {
        padding: 15px;
        border-radius: 8px;
    }
    
    .text-item {
        padding: 10px;
        margin-bottom: 12px;
    }
}


.centered-list {
    margin: 40px auto;
    padding: 30px;
    max-width: 800px;
    background: linear-gradient(135deg, rgba(13, 27, 42, 0.9), rgba(27, 107, 107, 0.3));
    border: 1px solid var(--emerald);
    border-radius: 15px;
    box-shadow: 
        0 0 25px var(--glow-color),
        0 0 50px rgba(27, 107, 107, 0.3),
        inset 0 0 15px rgba(27, 107, 107, 0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.centered-list::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--emerald), var(--accent-red), var(--emerald));
    border-radius: 16px;
    z-index: -1;
    opacity: 0.7;
    animation: glow-pulse 3s ease-in-out infinite;
}

.centered-list:hover {
    box-shadow: 
        0 0 35px var(--glow-color),
        0 0 70px rgba(27, 107, 107, 0.4),
        inset 0 0 20px rgba(27, 107, 107, 0.3);
}

.list-title {
    font-size: 2rem;
    font-family: 'Russo One';
    color: var(--accent-white);
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--glow-color);
    position: relative;
    display: inline-block;
}

.list-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-red), transparent);
}

.list-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: inline-block;
    text-align: left;
}

.list-item {
    margin-bottom: 15px;
    padding: 12px 20px;
    background: rgba(10, 10, 15, 0.6);
    border: 1px solid rgba(27, 107, 107, 0.3);
    border-radius: 8px;
    color: var(--accent-white);
    font-size: 1.3rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}


.list-item:hover {
    background: rgba(27, 107, 107, 0.2);
    border-color: var(--emerald);
    box-shadow: 0 0 15px rgba(27, 107, 107, 0.4);
}

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

@keyframes glow-pulse {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 0.8;
    }
}


@media (max-width: 768px) {
    .centered-list {
        margin: 30px 20px;
        padding: 25px 20px;
        border-radius: 12px;
    }
    
    .list-title {
        font-size: 1.5rem;
    }
    
    .list-item {
        padding: 10px 15px 10px 35px;
        font-size: 1rem;
    }
    
    .list-item::before {
        left: 12px;
    }

    .additional-text {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .centered-list {
        margin: 20px 10px;
        padding: 20px 15px;
        border-radius: 10px;
    }
    
    .list-title {
        font-size: 1.3rem;
    }
    
    .list-item {
        padding: 8px 12px 8px 30px;
    }
    
    .list-item::before {
        left: 10px;
        font-size: 0.7rem;
    }
    .additional-text {
        font-size: 1rem;
    }
}

.centered-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    margin-bottom: 50px;
}

.reg-btn {
    font-size: 2rem;
    font-family: 'Russo One';
    display: inline-block;
    padding: 20px 50px;
    background: linear-gradient(135deg, #a4061e, #d4004e);
    color: var(--accent-white);
    font-weight: 700;
    text-transform: uppercase;
    text-decoration: none;
    text-align: center;
    letter-spacing: 2px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.reg-btn::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #ff2a46, #ff6b7a, #96002f);
    border-radius: 12px;
    z-index: -1;
    opacity: 0.8;
    animation: btn-glow 2s ease-in-out infinite;
}

.reg-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.reg-btn:hover {
    transform: translateY(-3px) scale(1.05);
    background: linear-gradient(135deg, #c50643, #e60052);
}

.reg-btn:hover::after {
    left: 100%;
}

.reg-btn:active {
    transform: translateY(-1px) scale(1.02);
    box-shadow: 
        0 0 20px rgba(255, 42, 109, 0.7),
        0 0 40px rgba(255, 42, 109, 0.5),
        inset 0 0 10px rgba(255, 255, 255, 0.1);
}

@keyframes btn-glow {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.9;
    }
}


@media (max-width: 768px) {
    .reg-btn {
        padding: 18px 40px;
        font-size: 2rem;
        letter-spacing: 1.5px;
    }
}

@media (max-width: 480px) {
    .reg-btn {
        padding: 16px 35px;
        font-size: 1.5rem;
        letter-spacing: 1px;
        border-radius: 8px;
    }
}