/* Chi tiết công trình Styles */
:root {
    /* Colors */
    --color-black: #000000;
    --color-dark-gray-1: #1a1a1a;
    --color-dark-gray-2: #222222;
    --color-white: #ffffff;
    --color-light-gray-1: #f5f5f5;
    --color-light-gray-2: #e0e0e0;
    --color-blue-1: #3182ce;
    --color-blue-2: #4299e1;
    
    /* Typography */
    --font-family: 'Montserrat', sans-serif;
    --font-size-small: 0.875rem;
    --font-size-base: 1rem;
    --font-size-medium: 1.125rem;
    --font-size-large: 1.5rem;
    --font-size-xlarge: 2.5rem;
    --font-size-xxlarge: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border */
    --border-radius-small: 4px;
    --border-radius-medium: 8px;
    --border-radius-large: 14px;
    --border-radius-xlarge: 24px;
    
    /* Effects */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --transition-fast: 200ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 500ms ease;
}

/* Back Button */
.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius-medium);
    transition: all var(--transition-fast);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.back-button i {
    font-size: 1.2rem;
}

.back-button:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: translateX(-3px);
}

/* Hero Slider */
.project-hero {
    position: relative;
    height: 80vh;
    min-height: 500px;
    overflow: hidden;
}

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

.project-slider__item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-slider__item.active {
    opacity: 1;
    z-index: 1;
}

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

.project-slider__nav {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    z-index: 2;
}

.slider-nav {
    background: rgba(0, 0, 0, 0.6);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-white);
    transition: all var(--transition-fast);
}

.slider-nav i {
    font-size: 1.5rem;
}

.slider-nav:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--color-white);
    transform: scale(1.2);
}

/* Project Details */
.project-details {
    padding: var(--spacing-xl) 0;
}

.project-details__header {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--spacing-md);
}

.project-details__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: #ffffff!important;
}

.project-details__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    color: var(--color-light-gray-2);
    font-size: 0.9rem;
}

.project-details__meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.project-details__meta i {
    font-size: 1.2rem;
    color: var(--color-blue-1);
}

/* Quote */
.project-details__quote {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-medium);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--color-blue-1);
}

.quote-icon {
    position: absolute;
    top: -15px;
    left: -15px;
    font-size: 3rem;
    color: var(--color-blue-1);
    opacity: 0.3;
}

blockquote {
    border-left: 2px solid #ffffff;
    color: #ffffff!important;
    font-size: 1.2em;
    font-style: italic;
    margin: 0 0 1.25em;
    padding: 0 1.25em 0 1.875em;
    position: relative;
}
.quote-author {
    text-align: right;
    font-weight: 500;
    color: var(--color-light-gray-2);
}

/* Highlights */
.project-details__highlights {
    margin-bottom: var(--spacing-xl);
}

.project-details__highlights h2,
.project-details__specs h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.highlight-list {
    list-style: none;
    color: #ffffff!important;   
}

.highlight-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: var(--spacing-sm);
}

.highlight-list li i {
    color: var(--color-blue-1);
    font-size: 1.2rem;
    background: rgba(49, 130, 206, 0.1);
    border-radius: 50%;
    padding: 5px;
    box-sizing: content-box;
}

.highlight-list li span {
    line-height: 1.5;
}

/* Specs */
.project-details__specs {
    margin-bottom: var(--spacing-xl);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.spec-item {
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-medium);
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: #ffffff!important;
}

.spec-title {
    font-size: 0.85rem;
    color: var(--color-light-gray-2);
    margin-bottom: var(--spacing-xs);
}

.spec-value {
    font-size: 1rem;
    font-weight: 500;
}

/* Content Description */
.project-details__content {
    margin-bottom: var(--spacing-xl);
}

.project-details__content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.project-details__content .content {
    line-height: 1.6;
    color: var(--color-light-gray-1);
}

.project-details__content .content p {
    margin-bottom: var(--spacing-sm);
}

.project-details__content .content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    color: var(--color-white);
}

.project-details__content .content ul,
.project-details__content .content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.project-details__content .content li {
    margin-bottom: var(--spacing-xs);
}

/* CTA */

/* Buttons
---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-large);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    outline: none;
}

.btn i {
    font-size: 1.1rem;
}

.btn--primary {
    background: linear-gradient(to right, var(--color-blue-1), var(--color-blue-2));
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(49, 130, 206, 0.3);
}

.btn--primary:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(49, 130, 206, 0.4);
}

.btn--primary:active {
    transform: scale(0.97);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--secondary {
    background: transparent;
    border: 1px solid var(--color-blue-1);
    color: var(--color-blue-1);
}

.btn--secondary:hover {
    background: rgba(49, 130, 206, 0.1);
}

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

.btn--animated {
    animation: pulse 2s infinite;
}

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

/* CTA Section
---------------------------------------- */
.cta {
    padding: var(--spacing-xl) 0 calc(var(--spacing-xl) * 2);
}

.cta__inner {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.1), rgba(232, 232, 232, 0.05));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta__text {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.project-details__cta {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Responsive */
@media (max-width: 768px) {
    .project-hero {
        height: 60vh;
    }
    
    .project-details__title {
        font-size: 2rem;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .back-button span {
        display: none;
    }
    
    .back-button {
        padding: 0.6rem;
    }
    
    .project-details__meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .project-hero {
        height: 50vh;
    }
    
    .slider-nav {
        width: 30px;
        height: 30px;
    }
    
    .slider-nav i {
        font-size: 1.2rem;
    }
    
    .dot {
        width: 8px;
        height: 8px;
    }
}