/* Smooth Scroll Behavior */
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-overflow-scrolling: touch; }

/* Custom Scroll Reveal Utilities */
.reveal-up { opacity: 0; transform: translateY(50px); transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1); will-change: opacity, transform; }
.reveal-left { opacity: 0; transform: translateX(-50px); transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1); will-change: opacity, transform; }
.reveal-right { opacity: 0; transform: translateX(50px); transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1); will-change: opacity, transform; }
.reveal-zoom { opacity: 0; transform: scale(0.8); transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1); will-change: opacity, transform; }

.reveal-up.active, .reveal-left.active, .reveal-right.active { opacity: 1; transform: translate(0); }
.reveal-zoom.active { opacity: 1; transform: scale(1); }

/* Stagger Delays */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }
.delay-600 { transition-delay: 0.6s; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* Glass Effect */
.glass-panel {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Scroll Progress & Navbar Transitions */
#navbar { transition: background-color 0.4s ease, box-shadow 0.4s ease; }
#navbar.navbar-dark { background-color: rgba(15, 23, 42, 0.95); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
#navbar.navbar-dark .nav-link { color: rgba(255,255,255,0.9); }
#navbar.navbar-dark .nav-link:hover, #navbar.navbar-dark .nav-link.active { color: #00B4D8; }
#navbar.navbar-dark .nav-link::after { background-color: #00B4D8; }
#navbar.navbar-dark .hamburger, 
#navbar.navbar-dark .hamburger::before, 
#navbar.navbar-dark .hamburger::after { background-color: white; }

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Toast Notifications */
#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 10px; pointer-events: none; }
.toast { background: white; color: #0F172A; padding: 12px 20px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); border-left: 4px solid #00B4D8; transform: translateX(120%); transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55); display: flex; align-items: center; gap: 10px; min-width: 250px; pointer-events: auto; }
.toast.show { transform: translateX(0); }
.toast.error { border-left-color: #EF4444; }
.toast.success { border-left-color: #22C55E; }

/* Empty State */
.empty-state { text-align: center; padding: 60px 20px; width: 100%; grid-column: 1 / -1; display: none; }
.empty-state.visible { display: block; animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Load More Loading */
.btn-loading { position: relative; color: transparent !important; pointer-events: none; }
.btn-loading::after { content: ""; position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; border: 2px solid #ffffff; border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; transform: translate(-50%, -50%); }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* Modal Skeleton Overrides */
.skeleton-text { color: transparent !important; background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%); background-size: 200% 100%; animation: skeleton-loading 1.5s infinite; border-radius: 4px; user-select: none; }

/* Mobile Menu & Hamburger Animation */
.menu-toggle.active .hamburger { background-color: transparent !important; }
.menu-toggle.active .hamburger::before { transform: rotate(45deg); top: 0; }
.menu-toggle.active .hamburger::after { transform: rotate(-45deg); top: 0; }

#navMenu.active { transform: translateY(0); }