/* ============================================
   Custom Styles - Dhiar Harianto Portfolio
   Terminal/Hacker aesthetic with Deep Ocean palette
   ============================================ */

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

::selection {
    background: #4a9a8e;
    color: #0f1419;
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #0f1419;
}

::-webkit-scrollbar-thumb {
    background: #4a9a8e;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #5ab8a8;
}

/* --- Scroll Animations --- */
.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Staggered delay classes for sequential animation */
.scroll-delay-1 {
    transition-delay: 0.15s;
}

.scroll-delay-2 {
    transition-delay: 0.3s;
}

.scroll-delay-3 {
    transition-delay: 0.45s;
}

/* --- Hero Fade-in Animation --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

/* --- Cursor Blink Effect for Hero --- */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

h2::after {
    animation: blink 1s infinite;
}

/* --- Typing Animation Cursor --- */
.typing-cursor {
    animation: blink 0.8s infinite;
    color: #4a9a8e;
}

/* --- Card Hover Effects --- */
.card {
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 154, 142, 0.5);
    box-shadow: 0 8px 30px rgba(74, 154, 142, 0.1);
}

/* --- Navigation Link Active State --- */
.nav-link.active {
    color: #4a9a8e;
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #4a9a8e;
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* --- Button Styles --- */
.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

/* --- Navbar Scroll Effect --- */
#navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* --- Section Title Decoration --- */
.section-title::before {
    content: '# ';
    color: #4a9a8e;
    opacity: 0.5;
}

/* --- Back to Top Button Transition --- */
#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* --- Sticky CTA Transition --- */
#sticky-cta.visible {
    opacity: 1;
    visibility: visible;
}

/* --- Social Link Hover --- */
.social-link:hover svg {
    transform: scale(1.1);
    transition: transform 0.2s ease;
}

/* --- Focus Styles for Accessibility --- */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid #4a9a8e;
    outline-offset: 2px;
}

/* --- Skip Link for Accessibility --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: #4a9a8e;
    color: #0f1419;
    padding: 0.5rem 1rem;
    z-index: 100;
    font-weight: bold;
}

.skip-link:focus {
    top: 0;
}

/* --- Mobile Menu Animation --- */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

#mobile-menu.open {
    max-height: 300px;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    /* Stack sticky CTA and back-to-top on mobile */
    #sticky-cta {
        bottom: 5rem;
        left: 50%;
        transform: translateX(-50%);
    }
    
    #back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
    }
}