/* ===== BASE & RESET ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: rgba(13, 148, 136, 0.3);
    color: #f8fafc;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #080f1a;
}

::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* ===== MOBILE MENU ===== */
.mobile-nav-link {
    display: block;
    font-size: 1rem;
    letter-spacing: 0.05em;
}

/* ===== NAVBAR SCROLL STATE ===== */
#navbar.scrolled {
    background-color: rgba(8, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(30, 41, 59, 0.5);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

#navbar.scrolled .menu-line {
    background-color: #f1f5f9;
}

/* ===== MOBILE MENU ANIMATION ===== */
#mobile-menu-btn[aria-expanded="true"] .menu-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

#mobile-menu-btn[aria-expanded="true"] .menu-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

#mobile-menu-btn[aria-expanded="true"] .menu-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
    width: 1.25rem;
}

/* ===== REVEAL ANIMATIONS ===== */
/* Default state: visible (progressive enhancement — content renders even without JS) */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), 
                transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-left {
    transform: translateX(0);
}

.reveal-right {
    transform: translateX(0);
}

/* Animated states — applied via JS only */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up.animating {
        opacity: 0;
        transform: translateY(30px);
    }
    
    .reveal-left.animating {
        opacity: 0;
        transform: translateX(-30px);
    }
    
    .reveal-right.animating {
        opacity: 0;
        transform: translateX(30px);
    }
    
    .reveal-up.animated {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal-left.animated {
        opacity: 1;
        transform: translateX(0);
    }
    
    .reveal-right.animated {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Reduced motion: keep everything visible */
@media (prefers-reduced-motion: reduce) {
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ===== BACK TO TOP ===== */
#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ===== FOCUS STYLES ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
    border-radius: 2px;
}

/* ===== INPUT DATE PICKER DARK THEME ===== */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.7) sepia(1) saturate(3) hue-rotate(130deg);
    cursor: pointer;
}

/* ===== IMAGE LOADING SHIMMER ===== */
img {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    min-height: 4px;
}

/* ===== SUBTLE GOLD GLOW ON HOVER FOR CARDS ===== */
.group:hover .group-hover\:scale-105 {
    transform: scale(1.05);
}