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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f0fdfa;
}
::-webkit-scrollbar-thumb {
    background: #99f6e4;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #5eead4;
}

/* ===== Navbar ===== */
.navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(14, 165, 141, 0.1);
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #0d9488;
    border-radius: 1px;
    transition: width 0.3s ease;
}

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

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #0d9488;
    color: #ffffff;
    font-weight: 600;
    border-radius: 12px;
    padding: 12px 28px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
    background: #0f766e;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    color: #0d9488;
    font-weight: 600;
    border-radius: 12px;
    padding: 12px 28px;
    transition: all 0.3s ease;
    border: 2px solid #0d9488;
    cursor: pointer;
    text-decoration: none;
}

.btn-secondary:hover {
    background: #f0fdfa;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.15);
}

/* ===== Input Fields ===== */
.input-field {
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: inherit;
    color: #1e293b;
    background: #ffffff;
    transition: all 0.3s ease;
    outline: none;
}

.input-field::placeholder {
    color: #94a3b8;
}

.input-field:focus {
    border-color: #0d9488;
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
}

/* ===== Mobile Menu ===== */
.mobile-menu {
    animation: slideDown 0.3s ease;
}

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

.mobile-nav-link {
    display: block;
    padding: 8px 16px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.mobile-nav-link:hover {
    background: #f0fdfa;
}

/* ===== Float Animation ===== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ===== Reveal Animations (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
    .reveal:nth-child(4) { transition-delay: 0.3s; }
}

/* For users who prefer reduced motion, ensure content is always visible */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
    .font-serif {
        font-size: clamp(2rem, 8vw, 3.5rem);
    }
    
    .navbar {
        background: rgba(255, 255, 255, 0.95);
    }
}