/* ============================================
   Robert A. Lambert, MD, FACC — Cardiology
   Clean Minimalist · Teal & Slate Grey
   ============================================ */

/* ---- Reset & Base ---- */
*, *::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;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ---- Navbar ---- */
#navbar {
    transition: background-color 0.5s ease, box-shadow 0.5s ease;
}

#navbar.scrolled {
    background-color: rgba(4, 47, 46, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.6);
    transition: width 0.3s ease;
}

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

/* ---- Hero ---- */
.hero-badge {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.3s;
}

.hero-badge svg {
    animation: pulse-line 2s ease-in-out infinite;
}

@keyframes pulse-line {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

#hero h1 {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.5s;
}

#hero p {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.7s;
}

#hero .flex.flex-wrap {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.9s;
}

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

/* Scroll line animation */
.scroll-line {
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); transform-origin: top; }
    50% { opacity: 0.8; transform: scaleY(1); }
}

/* ---- Service Cards ---- */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(20, 184, 166, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card:hover {
    transform: translateY(-2px);
}

/* ---- Approach Items ---- */
.approach-item {
    position: relative;
}

.approach-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(20, 184, 166, 0.4), transparent);
    transition: width 0.5s ease;
}

.approach-item:hover::after {
    width: 80%;
}

/* ---- Scroll Reveal (below fold only) ---- */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: none;
}

/* ---- Mobile Menu ---- */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

.mobile-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* ---- Menu Button ---- */
.menu-line {
    transition: all 0.3s ease;
}

#menu-btn.active .menu-line:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
}

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

#menu-btn.active .menu-line:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
    width: 1.5rem;
}

/* ---- Form ---- */
#appointment-form input:focus,
#appointment-form textarea:focus {
    outline: none;
    border-color: rgba(45, 212, 191, 0.5) !important;
    background-color: rgba(255, 255, 255, 0.08) !important;
}

#appointment-form input::placeholder,
#appointment-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

/* ---- Accessibility: Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    #hero h1 {
        font-size: 2.5rem;
    }

    .service-card {
        padding: 2rem !important;
    }

    .approach-item {
        padding: 2rem !important;
    }
}

@media (max-width: 640px) {
    #hero h1 {
        font-size: 2rem;
    }

    #hero p {
        font-size: 1rem;
    }
}