/**
 * Intellarys Design System - Base Styles
 * Reset, typography, and foundational styles
 */

/* Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background: var(--dark);
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    background-image: none;
}

/* Chinese font override */
[lang="hk"] body,
html[lang="hk"] {
    font-family: 'Noto Sans TC', var(--font-sans);
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--primary);
    color: white;
}

/* Links */
a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.2s var(--ease-out-quart);
}

a:hover {
    color: var(--primary);
}

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

/* Lists */
ul, ol {
    list-style: none;
}

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

/* Form elements */
input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* Utility Classes */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.muted { color: var(--text-muted); }

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

/* Background Effects */
.bg-glow {
    display: none;
}

/* Tech Decorative Markers */
.tech-marker {
    display: none;
}

/* Keyframes */
@keyframes fadeIn {
    to { opacity: 1; }
}

@keyframes fadeInGlow {
    to { opacity: 0.7; }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.9);
    }
}

@keyframes pulseGlow {
    0% {
        opacity: 0.5;
        transform: scale(1);
    }
    100% {
        opacity: 1;
        transform: scale(1.1);
    }
}

@keyframes shine {
    to { left: 200%; }
}

@keyframes border-spin {
    to { --gradient-angle: 360deg; }
}

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--ease-out-expo);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }