:root {
    --midnight-950: #030814;
    --midnight-900: #060D1A;
    --midnight-800: #0A1628;
    --midnight-700: #0F1F38;
    --mint-400: #5EEAD4;
    --mint-500: #34D399;
    --mint-600: #10B981;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--midnight-950);
    color: white;
    overflow-x: hidden;
}

.font-serif {
    font-family: 'Lora', serif;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--midnight-950);
}
::-webkit-scrollbar-thumb {
    background: var(--midnight-700);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--mint-500);
}

/* Loader */
#page-loader {
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
#page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

/* Header */
#site-header {
    transition: background-color 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}
#site-header.scrolled {
    background-color: rgba(3, 8, 20, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

.nav-link {
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--mint-400);
    transition: width 0.3s ease;
}
.nav-link:hover::after {
    width: 100%;
}

/* Mobile menu */
#mobile-menu {
    transition: opacity 0.4s ease, visibility 0.4s ease;
}
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}
#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

.menu-line {
    transition: all 0.3s ease;
}
#mobile-toggle.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
#mobile-toggle.active .menu-line:nth-child(2) {
    opacity: 0;
}
#mobile-toggle.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 20px;
}

.mobile-nav-link {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}
#mobile-menu.open .mobile-nav-link {
    opacity: 1;
    transform: translateY(0);
}
#mobile-menu.open .mobile-nav-link:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-nav-link:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-nav-link:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-nav-link:nth-child(4) { transition-delay: 0.25s; }

/* Back to top */
#back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}
#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

/* Reveal animations */
.reveal-up, .reveal-left, .reveal-right {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-left {
        opacity: 0;
        transform: translateX(-40px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-right {
        opacity: 0;
        transform: translateX(40px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-up.revealed, .reveal-left.revealed, .reveal-right.revealed {
        opacity: 1;
        transform: none;
    }
}

/* Focus styles */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--mint-400);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Selection */
::selection {
    background: rgba(94, 234, 212, 0.3);
    color: white;
}