* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

#navbar {
    background: transparent;
    transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

#navbar.scrolled {
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #FF6600;
    transition: width 0.3s ease;
}

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

@keyframes pulse-glow {
    0%, 100% {
        filter: drop-shadow(0 0 8px rgba(255, 102, 0, 0.4));
    }
    50% {
        filter: drop-shadow(0 0 16px rgba(255, 102, 0, 0.8));
    }
}

.animate-pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

@keyframes slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slide-in-left 0.8s ease-out forwards;
}

.slide-in-right {
    animation: slide-in-right 0.8s ease-out forwards;
}

::selection {
    background-color: #FF6600;
    color: white;
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: #1A1A1A;
}

::-webkit-scrollbar-thumb {
    background-color: #FF6600;
    border-radius: 6px;
    border: 3px solid #1A1A1A;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #ff8533;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid #FF6600;
    outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
    outline: none;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #FF6600;
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

@keyframes bounce-gentle {
    0%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    50% {
        transform: translateY(-8px) translateX(-50%);
    }
}

#hero a[href="#about"] {
    animation: bounce-gentle 2s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0px 1000px white inset;
    transition: background-color 5000s ease-in-out 0s;
}

a {
    text-decoration: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.sr-only:focus,
.sr-only:focus-visible {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

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

.gradient-animate {
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

.group:hover .group-hover\:scale-110 {
    transform: scale(1.1);
}

@media (max-width: 767px) {
    #mobile-menu {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }
    
    #mobile-menu.open {
        max-height: 500px;
    }
}

@media (min-width: 768px) {
    .grid > .fade-in:nth-child(1) { transition-delay: 0.1s; }
    .grid > .fade-in:nth-child(2) { transition-delay: 0.2s; }
    .grid > .fade-in:nth-child(3) { transition-delay: 0.3s; }
    .grid > .fade-in:nth-child(4) { transition-delay: 0.4s; }
}

.stagger-children > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.15s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.25s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.35s; }

button[type="submit"] {
    position: relative;
    overflow: hidden;
}

button[type="submit"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button[type="submit"]:hover::before {
    left: 100%;
}

section {
    scroll-margin-top: 80px;
}

@media (max-width: 767px) {
    section {
        scroll-margin-top: 64px;
    }
}

@keyframes shine {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

.donate-card-shine {
    position: relative;
}

.donate-card-shine::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    background-size: 200% 100%;
    animation: shine 3s ease-in-out infinite;
    pointer-events: none;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 9999;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background-color: #10B981;
    color: white;
}

.toast.error {
    background-color: #EF4444;
    color: white;
}

.backdrop-blur-lg {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}