/* ===== Base & Reset ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Hero animations */
.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-slide-up {
    animation: slideUp 0.8s ease forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

.animate-slide-up-delay {
    animation: slideUp 0.8s ease forwards;
    animation-delay: 0.4s;
    opacity: 0;
}

.animate-slide-up-delay-2 {
    animation: slideUp 0.8s ease forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

/* Scroll reveal (progressive enhancement — only when JS is enabled) */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 1; /* Visible by default for no-JS */
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up.hidden-reveal,
.reveal-left.hidden-reveal,
.reveal-right.hidden-reveal {
    opacity: 0;
}

.reveal-up.hidden-reveal {
    transform: translateY(30px);
}

.reveal-left.hidden-reveal {
    transform: translateX(-40px);
}

.reveal-right.hidden-reveal {
    transform: translateX(40px);
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .reveal-up, .reveal-left, .reveal-right {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===== Navbar ===== */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(240, 253, 244, 0.92);
    backdrop-blur-lg;
    box-shadow: 0 1px 20px rgba(16, 42, 67, 0.08);
}

/* ===== Mobile Menu ===== */
#mobile-menu {
    animation: fadeIn 0.3s ease;
}

.mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(16, 42, 67, 0.06);
}

.mobile-link:last-child {
    border-bottom: none;
}

/* ===== Section transitions ===== */
section {
    position: relative;
}

/* ===== Form focus states ===== */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.2);
}

/* ===== Custom scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f0fdf4;
}

::-webkit-scrollbar-thumb {
    background: #86efac;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4ade80;
}

/* ===== Selection ===== */
::selection {
    background: #bbf7d0;
    color: #102a43;
}