/* Reset & Variables */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --bg-main: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --radius: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-dropdown: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    transition: var(--transition);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: var(--text-main);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.39);
}

/* Hero Section */
.hero {
    padding: 80px 0 40px;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 24px;
    color: #0f172a;
}

.text-gradient {
    /* Since we want it exactly like the image - just dark grey text, no gradient needed, but adding a subtle dark gradient looks premium */
    background: linear-gradient(135deg, #0f172a 0%, #334155 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

/* Filter Tabs */
.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    max-width: 1000px;
    margin: 0 auto 40px;
}

.filter-btn {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 0.8);
    padding: 10px 24px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
}

.filter-btn:hover {
    color: var(--text-main);
    border-color: #cbd5e1;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.filter-btn .count {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
}

.filter-btn.active .count {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.tab-other {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid #e2e8f0;
    color: #334155;
    font-weight: 600;
}

.tab-other:hover {
    background: #f1f5f9;
}

.tab-other.active {
    background: #0f172a;
    color: white;
    border-color: #0f172a;
    box-shadow: 0 4px 14px 0 rgba(15, 23, 42, 0.39);
}

/* Portfolio Grid */
.portfolio {
    padding-bottom: 80px;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 32px;
    opacity: 1;
    transition: opacity 0.4s ease;
}

.portfolio-grid.fade-out {
    opacity: 0;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.03), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-dropdown);
}

.card-img-wrapper {
    position: relative;
    width: 100%;
    padding-top: 66.66%;
    /* 3:2 Aspect Ratio */
    overflow: hidden;
    background: #f1f5f9;
}

.card-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover .card-img {
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    padding: 6px 12px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.875rem;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 4px;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.badge svg {
    width: 16px;
    height: 16px;
    fill: #eab308;
}

.card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tag {
    background: #f1f5f9;
    color: #475569;
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tag.primary {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: auto;
}

.card-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.card-link:hover {
    color: var(--primary-hover);
    gap: 8px;
}

.author {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.author svg {
    width: 14px;
    height: 14px;
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 12px;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    .filter-tabs::-webkit-scrollbar {
        height: 6px;
    }

    .filter-tabs::-webkit-scrollbar-thumb {
        background: #cbd5e1;
        border-radius: 10px;
    }
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.page-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}