:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #fff;
    --navbar-bg: rgba(255, 255, 255, 0.9);
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
}

.dark-mode {
    --bg-color: #181a1b;
    --text-color: #f1f3f4;
    --card-bg: #23272b;
    --navbar-bg: rgba(24, 26, 27, 0.95);
    --primary-color: #66aaff;
    --secondary-color: #b0b3b8;
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.3);
    /* Bootstrap variable overrides */
    --bs-body-bg: #181a1b;
    --bs-body-color: #f1f3f4;
    --bs-card-bg: #23272b;
    --bs-navbar-bg: #23272b;
    --bs-navbar-color: #f1f3f4;
    --bs-primary: #66aaff;
    --bs-secondary: #b0b3b8;
    --bs-link-color: #66aaff;
    --bs-link-hover-color: #aaccff;
    --bs-border-color: #444950;
}

body,
.card,
.navbar,
.dropdown-menu,
.modal-content,
.offcanvas,
.form-control,
.btn {
    transition: background 0.3s, color 0.3s, border-color 0.3s;
}

body {
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
    background: var(--bg-color);
    color: var(--text-color);
}

.navbar {
    backdrop-filter: blur(10px);
    background-color: var(--navbar-bg) !important;
    box-shadow: var(--shadow);
}

.navbar .nav-link.active,
.navbar .nav-link:focus {
    font-weight: 600;
    color: var(--primary-color) !important;
    border-bottom: 2px solid var(--primary-color);
    background: none;
}

.section-padding {
    padding: 100px 0;
}

.card {
    transition: transform 0.3s ease;
    background: var(--card-bg);
    color: var(--text-color);
    box-shadow: var(--shadow);
}

.card:hover {
    transform: translateY(-5px);
}

.btn {
    padding: 10px 25px;
    border-radius: 30px;
    font-size: 1rem;
}

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

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

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

.social-icon {
    transition: transform 0.3s ease;
}

.social-icon:hover {
    transform: scale(1.2);
}

/* Theme toggle button styles */
#theme-toggle {
    color: inherit !important;
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    outline: none;
    padding: 0 0.5rem;
    min-width: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}

#theme-toggle:focus {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

#theme-toggle .fa-moon,
#theme-toggle .fa-sun {
    color: inherit !important;
    text-decoration: none !important;
    border: none !important;
    font-size: 1.5em;
    line-height: 1;
}

#theme-toggle:hover {
    background: rgba(0, 0, 0, 0.07);
    border-radius: 50%;
    color: var(--primary-color);
}

.dark-mode #theme-toggle:hover {
    background: rgba(255, 255, 255, 0.07);
    color: var(--primary-color);
}

footer.bg-dark {
    background: #181a1b !important;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .section-padding {
        padding: 40px 0 30px 0;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    .navbar {
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
    }

    /* Theme toggle button mobile styles */
    #theme-toggle {
        font-size: 1.8rem !important;
        padding: 8px !important;
        margin: 0 8px !important;
        min-width: 44px;
        min-height: 44px;
        display: flex !important;
        align-items: center;
        justify-content: center;
        z-index: 1000;
        position: relative;
    }

    #theme-toggle:hover {
        background-color: rgba(0, 0, 0, 0.1);
        border-radius: 50%;
    }

    .dark-mode #theme-toggle:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }
}