/* ============================================
   THEME SYSTEM
   Light Mode Overrides & Theme Toggle
   ============================================ */

/* ============================================
   LIGHT THEME
   ============================================ */
.theme-light {
    /* === Light Color Palette === */
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #f1f5f9;
    --color-bg-tertiary: #e2e8f0;

    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;

    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;

    /* Brand colors stay consistent */
    --color-brand-primary: #f09300;
    --color-brand-secondary: #fd3866;
    --color-brand-tertiary: #0ea5a3;

    --color-accent: #fd3866;
    --color-accent-light: #fd6484;
    --color-accent-hover: #e62e58;

    /* === Light Gradient === */
    --gradient-bg:
            radial-gradient(ellipse at 20% 0%, rgba(253, 56, 102, 0.08) 0%, transparent 50%),
            radial-gradient(ellipse at 80% 100%, rgba(240, 147, 0, 0.08) 0%, transparent 50%),
            linear-gradient(180deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);

    /* === Light Borders & Shadows === */
    --border-color: rgba(0, 0, 0, 0.08);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 20px rgba(253, 56, 102, 0.15);
}

/* Light theme specific adjustments */
.theme-light .topbar {
    background: rgba(255, 255, 255, 0.85);
    border-bottom-color: rgba(0, 0, 0, 0.06);
}

.theme-light .section-divider,
.theme-light .hero::after,
.theme-light .about-intro::after,
.theme-light .skills::after,
.theme-light .projects::after {
    opacity: 0.3;
}

/* ============================================
   TOP BAR / NAVIGATION
   ============================================ */
.topbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(0, 52, 58, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    max-width: var(--container-max);
    margin-inline: auto;
    padding: var(--space-3) var(--container-padding);
}

.nav__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(var(--space-2), 3vw, var(--space-6));
}

.nav__links a {
    position: relative;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: calc(100% - var(--space-4));
    height: 2px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base);
}

.nav__links a:hover {
    color: var(--color-text-primary);
}

.nav__links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: 1.125rem;
    transition:
            transform var(--transition-fast),
            background var(--transition-fast),
            border-color var(--transition-fast);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-brand-primary);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-light .theme-toggle {
    background: rgba(0, 0, 0, 0.05);
}

.theme-light .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.08);
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */
@media (max-width: 480px) {
    .nav {
        padding: var(--space-2) var(--space-3);
        gap: var(--space-2);
    }

    .nav__links {
        gap: var(--space-1);
    }

    .nav__links a {
        font-size: var(--font-size-xs);
        padding: var(--space-1) var(--space-2);
    }

    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .nav__links a {
        font-size: var(--font-size-sm);
        padding: var(--space-2);
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }
}