/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1400px;
    /* Wider layout like Studia-54 */
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.flex {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

/* Typography Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.uppercase {
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.h1 {
    font-family: var(--font-heading);
    font-size: var(--font-size-2xl);
    font-weight: 500;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.h2 {
    font-size: var(--font-size-xl);
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    max-width: 60ch;
}

/* Components */

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    border-radius: 0;
    /* Square/Sharp for elegance */
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 15, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    transition: padding var(--transition-fast);
}

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

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-link {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    position: relative;
    opacity: 0.6;
}

.nav-link.active,
.nav-link:hover {
    opacity: 1;
    color: var(--accent-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    padding-top: 100px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-color: var(--bg-primary);
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
    padding-left: 5%;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 400;
    line-height: 1.05;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(220, 143, 52, 0.08), transparent 60%);
    pointer-events: none;
    z-index: 1;
}

/* Card */
.card {
    background: transparent;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.card:hover {
    border-color: var(--accent-primary);
}

.card:hover .h3 {
    color: var(--accent-primary);
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    transition: all var(--transition-fast);
}

.whatsapp-float:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}


/* Filter Navigation */
.filter-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    cursor: pointer;
    padding-bottom: 5px;
    position: relative;
    transition: color 0.3s ease;
}

.filter-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-primary);
    transition: width 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--text-primary);
}

.filter-btn.active::after {
    width: 100%;
}

/* Project Grid */
.project-grid {
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 2rem;
}

/* Project Card */
.project-card {
    position: relative;
    height: 400px;
    overflow: hidden;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: transform var(--transition-fast), opacity 0.4s ease;
}

.project-card.hide {
    display: none;
}

.project-card.fade-out {
    opacity: 0;
    transform: scale(0.95);
}

.project-image {
    width: 100%;
    height: 100%;
    background: #2a2a2a;
    /* Default placeholder color */
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.6s cubic-bezier(0.215, 0.610, 0.355, 1);
}

.placeholder-text {
    color: rgba(255, 255, 255, 0.1);
    font-size: 2rem;
    font-weight: 700;
    text-transform: uppercase;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2.5rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-info {
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.project-title {
    color: #fff;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.project-category {
    color: #ddd;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    margin-bottom: 0;
}

/* Hover Effects */
.project-card:hover .project-image {
    transform: scale(1.05);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-card:hover .project-info {
    transform: translateY(0);
}

/* Lightbox */
.lightbox {
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    display: none;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    opacity: 1;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    text-align: center;
    position: relative;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-caption {
    margin-top: 1.5rem;
    color: #fff;
}

.lightbox-caption h3 {
    margin-bottom: 0.5rem;
    color: #fff;
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: #fff;
    font-size: 3rem;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.3s ease;
}

.lightbox-close:hover {
    color: var(--accent-primary);
}

/* Footer */
.footer {
    background: var(--bg-primary);
    padding: 6rem 0 3rem;
    border-top: 1px solid var(--border-color);
}