:root {
    --bg-dark: #0D1321;
    --bg-card: #1D2D44;
    --muted-blue: #3E5C76;
    --light-blue: #748CAB;
    --accent-pink: #FFDAE9;
    --text-light: #F4F6F9;
    --header-size: 5rem;
    --header-phone-size: 8rem;
}

.detail-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--header-size) + 3rem) 5% 6rem 5%;
}

.back-link {
    color: var(--light-blue);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--accent-pink);
}

.project-header-premium {
    position: relative;
    margin-top: 2.5rem;
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 2px solid var(--muted-blue);
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
}

.project-header-premium::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 15%;
    height: 2px;
    background-color: var(--accent-pink);
    box-shadow: 0 0 12px var(--accent-pink);
}

.title-meta-group {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    align-items: flex-start;
}

.gradient-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -1px;
    background: linear-gradient(to right, var(--text-light) 60%, var(--light-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.header-top-meta {
    display: flex;
    align-items: center;
}

.standard-badge {
    background: rgba(116, 140, 171, 0.08);
    border: 1px solid rgba(116, 140, 171, 0.25);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(13, 19, 33, 0.2);
}

.category-indicator {
    width: 6px;
    height: 6px;
    background-color: var(--light-blue);
    border-radius: 50%;
}

.category-tag {
    color: var(--text-light);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    font-weight: 700;
    white-space: nowrap;
}

.notable-badge {
    background: linear-gradient(135deg, rgba(255, 218, 229, 0.15), rgba(255, 218, 229, 0.05));
    color: var(--accent-pink);
    border: 1px solid rgba(255, 218, 229, 0.3);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(255, 218, 229, 0.05);
    white-space: nowrap;
}

.pulse-star {
    display: inline-block;
    font-size: 0.85rem;
    animation: star-pulse 2s infinite ease-in-out;
}

@keyframes star-pulse {
    0% { transform: scale(1); opacity: 0.8; text-shadow: 0 0 0 rgba(255, 218, 229, 0); }
    50% { transform: scale(1.2); opacity: 1; text-shadow: 0 0 8px rgba(255, 218, 229, 0.8); }
    100% { transform: scale(1); opacity: 0.8; text-shadow: 0 0 0 rgba(255, 218, 229, 0); }
}

.tech-stack-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-end;
}

.tech-label {
    font-size: 0.85rem;
    color: var(--muted-blue);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: flex-end;
}

.lang-tag {
    background-color: var(--bg-card);
    color: var(--text-light);
    border: 1px solid var(--muted-blue);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: border-color 0.3s, color 0.3s;
}

.lang-tag:hover {
    border-color: var(--accent-pink);
    color: var(--accent-pink);
}

.project-cover {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--muted-blue);
    margin-bottom: 6rem;
}

.project-cover img {
    width: 100%;
    height: auto;
    display: block;
}

.project-walkthrough {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

.walkthrough-step {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.normal-row {
    flex-direction: row;
}

.reverse-row {
    flex-direction: row-reverse;
}

.full-width-row {
    flex-direction: row;
}

.full-width-row .step-text {
    flex: 1;
    max-width: 100%;
}

.step-text {
    flex: 1;
}

.step-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--muted-blue);
    margin-bottom: 0.5rem;
    font-family: monospace;
}

.step-text p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.7;
    opacity: 0.9;
}

.step-image-wrapper {
    flex: 1.2;
    background-color: var(--bg-card);
    border: 1px solid var(--muted-blue);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(13, 19, 33, 0.4);
}

.step-image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
}

.last-step-with-git {
    padding-bottom: 5rem;
}

.action-container {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 45%;
}

.reverse-row.last-step-with-git ~ .action-container {
    left: auto;
    right: 0;
}

.full-width-row.last-step-with-git ~ .action-container {
    width: 100%;
}

.github-btn {
    display: inline-block;
    background-color: transparent;
    color: var(--accent-pink);
    border: 2px solid var(--accent-pink);
    padding: 0.7rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s, color 0.3s;
}

.github-btn:hover {
    background-color: var(--accent-pink);
    color: var(--bg-dark);
}

.bottom-back-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: -7rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(62, 92, 118, 0.3);
}

.back-btn-premium {
    margin-top: 1rem;
    display: inline-block;
    background-color: transparent;
    color: var(--light-blue);
    border: 2px solid var(--muted-blue);
    padding: 0.8rem 2.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.back-btn-premium:hover {
    border-color: var(--accent-pink);
    color: var(--bg-dark);
    background-color: var(--accent-pink);
    box-shadow: 0 0 15px rgba(255, 218, 229, 0.4);
    transform: translateY(-2px);
}

.back-btn-premium:active {
    transform: translateY(0);
}

@media screen and (max-width: 912px) {
    .project-header-premium {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .title-meta-group {
        gap: 1.2rem;
    }

    .gradient-title {
        font-size: 2.8rem;
        letter-spacing: -1px;
    }

    .tech-stack-container {
        align-items: flex-start;
        margin-top: 0.5rem;
    }

    .tech-stack {
        justify-content: flex-start;
    }

    .walkthrough-step, .reverse-row, .full-width-row {
        flex-direction: column;
        gap: 2rem;
    }

    .last-step-with-git {
        padding-bottom: 0;
    }

    .action-container {
        position: static;
        width: 100% !important;
        margin-top: 2rem;
    }

    .github-btn {
        display: block;
        text-align: center;
    }

    .project-walkthrough {
        gap: 4rem;
    }

    .bottom-back-container {
        margin-top: 3rem;
        padding-top: 2rem;
    }
    
    .back-btn-premium {
        display: block;
        text-align: center;
        width: 100%;
        box-sizing: border-box;
    }
}

@media screen and (max-width: 768px) {
    .detail-container {
        padding-top: calc(var(--header-phone-size) + 2rem);
    }
}