:root {
    --primary: #0d6efd;
    --primary-dark: #0a58ca;
    --bg-body: #f8faff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --section-bg: #ffffff;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

[data-bs-theme="dark"] {
    --primary: #60a5fa;
    --primary-dark: #3b82f6;
    --bg-body: #0f172a;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --card-bg: #1e293b;
    --navbar-bg: rgba(15, 23, 42, 0.9);
    --section-bg: #1e293b;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

[data-bs-theme="dark"] .navbar-toggler-icon {
    filter: invert(1) grayscale(100%) brightness(200%);
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

section {
    scroll-margin-top: 100px;
}

.navbar {
    background: var(--navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: all 0.3s ease;
    z-index: 1050;
}

.navbar-brand {
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.nav-link {
    color: var(--text-main) !important;
    font-weight: 500;
    font-size: 0.95rem;
    margin: 0 0.5rem;
    position: relative;
}

.nav-link::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width .3s;
    position: absolute;
    bottom: 0;
    left: 0;
}

.nav-link:hover::after {
    width: 100%;
}

.btn-custom {
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    color: white;
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 110, 253, 0.4);
    color: white;
}

.btn-outline-custom {
    border: 2px solid var(--border-color);
    color: var(--text-main);
    background: transparent;
}

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

.theme-toggle {
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    transition: all 0.3s;
}

.theme-toggle:hover {
    transform: rotate(15deg);
    border-color: var(--primary);
    color: var(--primary);
}

#hero {
    position: relative;
    background: linear-gradient(120deg, #2563eb, #1d4ed8, #1e40af);
    background-size: 200% 200%;
    animation: gradientBG 6s ease infinite;
    color: white;
    border-radius: 24px;
    padding: 80px 40px;
    margin-top: 2rem;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(37, 99, 235, 0.25);
    scroll-margin-top: 0;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.hero-img-container {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-15px);
    }

    100% {
        transform: translateY(0px);
    }
}

.hero-img {
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    object-fit: cover;
    height: 400px;
}

.badge-dynamic {
    background: var(--card-bg);
    color: var(--primary);
}

.tag-skill {
    display: inline-block;
    padding: 6px 14px;
    margin: 0 4px 8px 0;
    background: rgba(13, 110, 253, 0.08);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid transparent;
}

[data-bs-theme="dark"] .tag-skill {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary-dark);
}

.hover-card,
.content-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.hover-card {
    height: 100%;
}

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

.icon-box {
    width: 60px;
    height: 60px;
    background: rgba(13, 110, 253, 0.1);
    color: var(--primary);
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s;
}

.hover-card:hover .icon-box {
    transform: scale(1.1) rotate(5deg);
    background: var(--primary);
    color: white;
}

.portfolio-item {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: block;
    text-decoration: none;
    height: 100%;
}

.portfolio-item img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.portfolio-item:hover img {
    transform: scale(1.08);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-text {
    color: white;
    transform: translateY(20px);
    transition: transform 0.3s;
}

.portfolio-item:hover .portfolio-text {
    transform: translateY(0);
}

.social-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-main);
    transition: all 0.3s ease;
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    color: var(--primary);
    border-color: var(--primary);
}

.social-icon {
    font-size: 2rem;
    margin-right: 1rem;
    color: var(--text-muted);
    transition: color 0.3s;
}

.social-card:hover .social-icon {
    color: var(--primary);
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    #hero {
        padding: 40px 20px;
        text-align: center;
        margin-top: 10px;
    }

    #hero h1 {
        font-size: 2rem;
    }

    .hero-img-container {
        margin-top: 30px;
    }

    .hero-img {
        height: 250px;
    }

    .navbar-collapse {
        background: var(--card-bg);
        padding: 20px;
        border-radius: 12px;
        margin-top: 10px;
        box-shadow: var(--shadow-hover);
        border: 1px solid var(--border-color);
    }

    .d-flex.gap-3 {
        justify-content: center;
    }
}