:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --bg-light: #ffffff;
    --bg-dark: #1a1a1a;
    --text-light: #333333;
    --text-dark: #ffffff;
    --card-light: #ffffff;
    --card-dark: #2d2d2d;
}

[data-theme="dark"] {
    --bg-color: var(--bg-dark);
    --text-color: var(--text-dark);
    --card-color: var(--card-dark);
}

[data-theme="light"] {
    --bg-color: var(--bg-light);
    --text-color: var(--text-light);
    --card-color: var(--card-light);
}

* {
    transition: all 0.3s ease;
}

body {
    background: var(--bg-color, var(--bg-light));
    color: var(--text-color, var(--text-light));
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.18);
    transition: background 0.3s ease;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(45deg, #fff, #f093fb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    width: 1.5em;
    height: 1.5em;
}

.nav-link {
    color: white !important;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    padding: 0.5rem 1rem;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    border-radius: 50px;
    padding: 8px 16px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    background-clip: text;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
}

.btn-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-gradient:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(250, 250, 252, 0.4);
    color: white;
}

.btn-ripple {
    background: linear-gradient(135deg, var(rgb(34, 160, 108)), var(rgb(105, 56, 124)));
    border: none;
    color: white;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-ripple:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(21, 59, 228, 0.466);
    color: white;
}

[data-theme="dark"] .navbar {
    background: linear-gradient(135deg, #2d2d2d, #1a1a1a) !important;
}

/* Language Toggle */
.language-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    border-radius: 50px;
    padding: 8px 16px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
}

.language-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
        padding: 0;
    }
    .language-toggle {
        padding: 8px 12px;
        min-width: 50px;
    }
}

@media (max-width: 576px) {
    .btn-gradient {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}