/* ============================================
   Utilities - Animations, Helpers, Responsive
   ============================================ */

/* ---- Keyframe Animations ---- */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-3px);
    }
    60% {
        transform: translateY(-2px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Scroll-triggered Animation Classes ---- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--duration-slow) var(--ease-default),
                transform var(--duration-slow) var(--ease-default);
}

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

.animate-fade-in {
    animation: fadeIn var(--duration-slow) var(--ease-default) forwards;
}

.animate-fade-in-up {
    animation: fadeInUp var(--duration-slow) var(--ease-default) forwards;
}

.animate-fade-in-left {
    animation: fadeInLeft var(--duration-slow) var(--ease-default) forwards;
}

.animate-fade-in-right {
    animation: fadeInRight var(--duration-slow) var(--ease-default) forwards;
}

.animate-scale-in {
    animation: scaleIn var(--duration-slow) var(--ease-default) forwards;
}

/* Animation delay utilities */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* ---- Spacing Utilities ---- */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

/* ---- Text Utilities ---- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-dark { color: var(--color-dark); }
.text-gray { color: var(--color-gray); }
.text-white { color: var(--color-white); }

.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

.font-medium { font-weight: var(--weight-medium); }
.font-bold { font-weight: var(--weight-bold); }

/* ---- Display Utilities ---- */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ---- Visibility Utilities ---- */
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* Mobile-only / Desktop-only */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
    .show-mobile { display: block !important; }
}

@media (min-width: 769px) {
    .hide-desktop { display: none !important; }
    .show-desktop { display: block !important; }
}

/* ---- Overflow ---- */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* ---- Width / Height ---- */
.w-full { width: 100%; }
.h-full { height: 100%; }

/* ---- Border Utilities ---- */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }
.rounded-circle { border-radius: var(--radius-circle); }

/* ---- Shadow Utilities ---- */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-none { box-shadow: none; }

/* ---- Social Links (footer) ---- */
.social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-circle);
    color: var(--color-white);
    text-decoration: none;
    transition: all var(--duration-normal);
}

.social-links a:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

/* ---- Scroll-triggered animations ---- */
.scroll-hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .scroll-hidden {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ---- Print Styles ---- */
@media print {
    .site-header,
    .site-footer,
    .burger,
    .hero-controls,
    .skip-to-content {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}