/* ============================================
   ANIMATION KEYFRAMES
   GPU-accelerated using transform & opacity
   ============================================ */

/* Page Transitions */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Slide Animations */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Scale Animations */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Text Animations */
@keyframes typewriter {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    50% { border-color: transparent; }
}

/* ============================================
   ANIMATION CLASSES
   ============================================ */

/* Page Transition Classes */
.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

.fade-out {
    animation: fadeOut 0.2s ease-in forwards;
}

/* Scroll-Triggered Animation Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered Animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* Specific Element Animations */
.slide-in-left {
    animation: slideInLeft 0.5s ease-out forwards;
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out forwards;
}

.slide-up {
    animation: slideUp 0.5s ease-out forwards;
}

.scale-in {
    animation: scaleIn 0.4s ease-out forwards;
}

/* Hover Animations */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(255, 165, 0, 0.4);
}

/* ============================================
   NAVIGATION ANIMATIONS
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: #333;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, lightsalmon, tomato);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: tomato;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: #333;
    position: relative;
    transition: background 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background: #333;
    transition: transform 0.3s ease;
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ============================================
   RESPONSIVE NAVIGATION
   ============================================ */

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
        pointer-events: none;
    }
    
    .nav-links.nav-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
}

/* ============================================
   MAIN CONTENT SPACING
   ============================================ */

#app {
    margin-top: 80px; /* Account for fixed navbar */
    min-height: calc(100vh - 160px);
}