/* Base styles & custom properties */
:root {
    --color-teal-50: #f0fdfa;
    --color-teal-100: #ccfbf1;
    --color-teal-400: #2dd4bf;
    --color-teal-500: #14b8a6;
    --color-teal-600: #0d9488;
    --color-teal-700: #0f766e;
    --color-teal-800: #115e59;
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;
    --color-slate-950: #020617;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection color */
::selection {
    background-color: rgba(13, 148, 136, 0.2);
    color: var(--color-slate-900);
}

/* Focus styles */
*:focus-visible {
    outline: 2px solid var(--color-teal-500);
    outline-offset: 2px;
}

/* Remove default button styles */
button, [type='button'], [type='reset'], [type='submit'] {
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
}

input, textarea {
    font-family: inherit;
}

/* Reveal animation — progressive enhancement only */
.reveal {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered reveal delays */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Navbar scroll state */
.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

/* Mobile menu transitions */
#mobile-menu {
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Image loading placeholder */
img {
    background-color: var(--color-slate-100);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--color-slate-50);
}
::-webkit-scrollbar-thumb {
    background: var(--color-slate-300);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-slate-400);
}