/* ===== PREMIUM ANIMATIONS ===== */
@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blob {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ===== PREMIUM GRADIENT BACKGROUND ===== */
.premium-gradient {
    background: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #4facfe);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
}

/* ===== HERO PATTERN ===== */
.hero-pattern {
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(168, 85, 247, 0.3) 0%, transparent 50%);
}

/* ===== GLASSMORPHISM CARD ===== */
.glass-card {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* ===== FEATURE CARD HOVER ===== */
.feature-card {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feature-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
}

/* ===== PREMIUM BUTTON ===== */
.btn-premium {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
    z-index: -1;
}

.btn-premium:hover::before {
    left: 100%;
}

/* ===== REVEAL ANIMATION ===== */
.reveal {
    opacity: 0;
    animation: slide-up 0.8s ease-out forwards;
}

/* ===== FAQ PREMIUM ===== */
details.faq-premium {
    border-left: 4px solid transparent;
    transition: all 0.3s ease;
}

details.faq-premium:hover {
    border-left-color: #667eea;
    transform: translateX(8px);
}

details[open].faq-premium {
    border-left-color: #764ba2;
}

/* ===== WAVE DIVIDER ===== */
.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

/* ===== SMOOTH SCROLL ===== */
html {
    scroll-behavior: smooth;
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #764ba2 0%, #667eea 100%);
}

/* ===== STAT NUMBER GRADIENT ===== */
.stat-number {
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== BLOB ANIMATION ===== */
.animate-blob {
    animation: blob 7s infinite;
}

.animation-delay-2000 {
    animation-delay: 2s;
}

/* ===== MOBILE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
    .feature-card:hover {
        transform: translateY(-8px) scale(1.01);
    }
    
    .wave-divider svg {
        height: 40px;
    }
}

/* ===== CALCULATOR CARD ENHANCEMENT ===== */
.calculator-content {
    animation: slide-up 0.6s ease-out;
}

/* ===== ENHANCED SHADOWS ===== */
.shadow-premium {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.shadow-premium:hover {
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.25);
}

/* ===== TEXT GRADIENT ===== */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== LOADING STATE ===== */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.shimmer {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}