/* Apply Variables */
body {
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.glass-panel {
    background: var(--color-bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-glow);
}

.glass-panel-no-border {
    background: var(--color-bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-glow);
}

.glass-panel-heavy {
    background: var(--color-bg-panel);
    backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
}

.neon-glow {
    box-shadow: var(--shadow-glow);
}

.gradient-text {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-main);
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-primary);
}

/* Language & Theme Toggle Classes */
.lang-en { display: none; }
.lang-de { display: block; }
body.english-mode .lang-en { display: block; }
body.english-mode .lang-de { display: none; }

/* Chatbot Animations */
#chat-window {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: bottom right;
}

.chat-message {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Theme Specific Overrides */
body.theme-light .text-brand-white { color: var(--color-text-main); }
body.theme-light .text-gray-400 { color: var(--color-text-muted); }
body.theme-light .text-gray-300 { color: var(--color-text-main); }
body.theme-light .text-gray-500 { color: var(--color-text-muted); }
body.theme-light nav { background: rgba(255,255,255,0.95); border-bottom: 1px solid #e5e7eb; }
body.theme-light .filter-btn.active { color: white; }

/* Hero Background - Sharpness Hack Applied via Tailwind Classes */
/* Background image uses contrast-125 brightness-110 saturate-105 for crisp appearance */
/* Responsive positioning handled inline with media query */

/* Project Badge Theme Adaptation */
.project-badge {
    background: rgba(27, 40, 56, 0.9);
    color: #66FCF1;
    border-color: rgba(102, 252, 241, 0.2);
}
body.theme-light .project-badge {
    background: rgba(255, 255, 255, 0.95);
    color: #1A202C;
    border-color: rgba(0, 86, 145, 0.3);
}

/* GitHub Logo Theme Adaptation */
.github-logo {
    filter: brightness(0) invert(1);
}
body.theme-light .github-logo {
    filter: brightness(0);
}