.crystal-background {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #e91e63 100%);
    background-size: 200% 200%;
    animation: crystal-gradient-shift 15s ease infinite;
    pointer-events: none;
}

@keyframes crystal-gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.crystal-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-xl);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.crystal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.4), 
        transparent
    );
}

.crystal-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    color: white;
    font-size: 0.9375rem;
    transition: all 0.2s;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.1),
        0 1px 0 rgba(255, 255, 255, 0.1);
    box-sizing: border-box;
}

.crystal-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.crystal-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.1),
        0 1px 0 rgba(255, 255, 255, 0.2),
        0 0 0 3px rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.crystal-input:hover:not(:focus) {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
}

.crystal-button {
    padding: 0.875rem 1.25rem;
    border-radius: var(--border-radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.crystal-button-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 
        0 4px 16px rgba(102, 126, 234, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.crystal-button-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 
        0 6px 20px rgba(102, 126, 234, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.crystal-button-primary:active:not(:disabled) {
    transform: translateY(0);
}

.crystal-button-secondary {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.crystal-button-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 
        0 6px 16px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.crystal-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

body.crystal-theme {
    position: relative;
    min-height: 100vh;
}

body.crystal-theme::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #e91e63 100%);
    background-size: 200% 200%;
    animation: crystal-gradient-shift 15s ease infinite;
    pointer-events: none;
}

body.crystal-theme > * {
    position: relative;
    z-index: 1;
}

body.crystal-theme .section-with-3d {
    background: transparent;
}

body.crystal-theme .section-white {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

body.crystal-theme .hero {
    background: transparent;
}

body.crystal-theme .hero::before {
    display: none;
}

body.crystal-theme .hero-content {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .feature-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .feature-card:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(255, 255, 255, 0.15);
}

body.crystal-theme .step-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .step-card:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(255, 255, 255, 0.15);
}

body.crystal-theme .step-title,
body.crystal-theme .use-case-title {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .step-description,
body.crystal-theme .use-case-description {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .step-number {
    color: rgba(255, 255, 255, 0.4);
    -webkit-text-fill-color: rgba(255, 255, 255, 0.4);
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
    opacity: 0.4;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .step-highlight {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-left: 3px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
}

body.crystal-theme .step-highlight:hover {
    background: rgba(255, 255, 255, 0.2);
    border-left-color: rgba(255, 255, 255, 0.8);
    color: white;
}

body.crystal-theme .use-case-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid rgba(255, 255, 255, 0.4);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .use-case-card:hover {
    background: rgba(255, 255, 255, 0.2);
    border-top-color: rgba(255, 255, 255, 0.5);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(255, 255, 255, 0.15);
}

body.crystal-theme .section-title {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .problem-title,
body.crystal-theme .problem-title-accent,
body.crystal-theme .solution-title {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .problem-intro,
body.crystal-theme .solution-intro {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .problem-item-title,
body.crystal-theme .solution-value-title {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .problem-item-description,
body.crystal-theme .solution-value-description {
    color: rgba(255, 255, 255, 0.85);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .solution-value-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid rgba(255, 255, 255, 0.4);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .solution-value-card:hover {
    background: rgba(255, 255, 255, 0.2);
    border-top-color: rgba(255, 255, 255, 0.5);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(255, 255, 255, 0.15);
}

body.crystal-theme .problem-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

body.crystal-theme .problem-item:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

body.crystal-theme .multimedia-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .multimedia-item:hover {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(255, 255, 255, 0.15);
}

body.crystal-theme .multimedia-stats {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .stat-number {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .stat-label {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .feature-benefit,
body.crystal-theme .solution-value-benefit {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-left: 3px solid rgba(255, 255, 255, 0.6);
}

body.crystal-theme .feature-benefit strong,
body.crystal-theme .solution-value-benefit strong {
    color: white;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

body.crystal-theme .use-case-benefits li {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .use-case-benefits li::before {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .problem-label,
body.crystal-theme .solution-label {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

body.crystal-theme .problem-label:hover,
body.crystal-theme .solution-label:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    color: white;
}

body.crystal-theme .login-modal-overlay {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

body.crystal-theme .login-modal {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .login-modal h2 {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .login-subtitle {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .form-group input {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

body.crystal-theme .form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

body.crystal-theme .form-group input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 
        0 0 0 3px rgba(255, 255, 255, 0.1),
        0 4px 12px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .form-group label {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .login-close {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.crystal-theme .login-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: white;
    border-color: rgba(239, 68, 68, 0.4);
}

body.crystal-theme .header {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 4px 16px 0 rgba(31, 38, 135, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

body.crystal-theme .header-logo-text,
body.crystal-theme .hero-definition,
body.crystal-theme .feature-title {
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    -webkit-text-fill-color: white;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

body.crystal-theme .hero-tagline {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

body.crystal-theme .value-prop strong {
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

body.crystal-theme .value-prop span {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body.crystal-theme .hero-subtitle,
body.crystal-theme .feature-description {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.crystal-theme .hero-tagline {
    color: rgba(255, 255, 255, 0.8);
}

body.crystal-theme .cta-section-wrapper {
    background: transparent;
}

body.crystal-theme .cta-section {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.37),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

body.crystal-theme .cta-button-primary {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

body.crystal-theme .cta-button-primary:hover {
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 
        0 6px 16px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

@media (prefers-reduced-motion: reduce) {
    .crystal-background,
    body.crystal-theme::before {
        animation: none;
    }
}