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

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

body {
    margin: 0;
    overflow-x: hidden;
}

/* ===== NAVBAR ===== */
.nav-logo-text {
    transition: color 0.3s ease;
}

.nav-logo-sub {
    transition: color 0.3s ease;
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #34d4a8;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 60%;
}

/* Navbar scroll state */
.navbar-scrolled {
    background: rgba(255, 255, 255, 0.97) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(10, 22, 40, 0.06);
}

.navbar-scrolled .nav-logo-text {
    color: #0a1628;
}

.navbar-scrolled .nav-logo-sub {
    color: #059669;
}

.navbar-scrolled .nav-link {
    color: #1e2d6b;
}

.navbar-scrolled .nav-link:hover {
    color: #059669;
}

.navbar-hero .nav-logo-text,
.navbar-hero .nav-logo-sub {
    color: #ffffff;
}

.navbar-hero .nav-logo-sub {
    color: #5eead4;
}

.navbar-hero .nav-link {
    color: rgba(255, 255, 255, 0.75);
}

.navbar-hero .nav-link:hover {
    color: #5eead4;
}

.navbar-hero .nav-link::after {
    background: #5eead4;
}

.navbar-hero .menu-line {
    background: #ffffff;
}

/* ===== MOBILE MENU ===== */
.mobile-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ===== HERO STAT CARDS ===== */
.stat-card {
    opacity: 1;
    transform: translateY(0);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(10, 22, 40, 0.15);
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-grid {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease 0.2s, transform 0.7s ease 0.2s;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-grid {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .stat-card:hover {
        transform: none;
    }
    
    img {
        transition: none;
    }
}

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal-hidden {
        opacity: 0;
        transform: translateY(24px);
    }
    
    .reveal-hidden.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal-grid-hidden {
        opacity: 0;
        transform: translateY(32px);
    }
    
    .reveal-grid-hidden.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== BUTTONS ===== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #34d4a8;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== SELECTION ===== */
::selection {
    background: rgba(52, 212, 168, 0.2);
    color: #0a1628;
}

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

::-webkit-scrollbar-track {
    background: #f0f4fa;
}

::-webkit-scrollbar-thumb {
    background: #bcc8e4;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a7d4;
}

/* ===== MOBILE MENU ANIMATION ===== */
#mobile-menu.open {
    transform: translateX(0);
}

#mobile-menu.closed {
    transform: translateX(100%);
}

/* Hamburger animation */
.menu-toggle.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .menu-line:nth-child(3) {
    width: 20px;
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ===== FORM STYLES ===== */
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #34d4a8;
    box-shadow: 0 0 0 3px rgba(52, 212, 168, 0.15);
}

/* ===== UTILITY ===== */
.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;
}