:root {
    /* Premium Schwarz / Weiß Theme (LuPa Studio) */
    --bg-color: #030303;
    --surface-color: #111111;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #ffffff;
    --glass-bg: rgba(0, 0, 0, 0.4);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    font-size: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body, html {
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Montserrat', sans-serif;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Typografie */
h1, h2, h3, h4, .playfair {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
}

p {
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Glass UI Components */
.glass-panel {
    background: rgba(17, 17, 17, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-panel:hover {
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

/* Custom Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    text-decoration: none;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; height: 100%; width: 0;
    background: var(--text-primary);
    z-index: -1;
    transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:hover {
    color: var(--bg-color);
    border-color: var(--text-primary);
}

.btn:hover::before {
    width: 100%;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-color);
    border-color: var(--text-primary);
}
.btn-primary::before {
    background: rgba(0,0,0,0.1);
}
.btn-primary:hover {
    color: var(--bg-color);
    box-shadow: 0 0 20px rgba(255,255,255,0.3);
}

/* Modern Inputs */
.form-group {
    margin-bottom: 2rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 1rem 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-bottom-color: var(--text-primary);
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

/* Utilities */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mt-4 { margin-top: 4rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-4 { margin-bottom: 4rem; }

/* Main Wrapper */
.main-content {
    padding: 120px clamp(2rem, 5vw, 6rem) 4rem;
    width: 100%;
    margin: 0;
    min-height: calc(100vh - 300px);
    overflow-x: hidden;
}

/* Glow Effect - vergrößert für Full-Width */
.ambient-glow {
    position: absolute;
    width: clamp(600px, 80vw, 1200px);
    height: clamp(600px, 80vw, 1200px);
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, rgba(0,0,0,0) 60%);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}

/* Loader */
.loader-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-color);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.loader-overlay.active {
    display: flex;
    animation: fadeIn 0.3s ease forwards;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 2px solid rgba(255,255,255,0.1);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 2rem;
}

@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding: 100px 1.5rem 3rem;
    }
    .glass-panel {
        padding: 1.5rem;
    }
}