/* ============================================
   Zahid Khan MD — Premium Medical Website
   Color Palette: Deep Emerald + Gold + Cream
   ============================================ */

:root {
    --bg-primary: #060d0a;
    --bg-secondary: #08140e;
    --bg-card: #0a1a12;
    --bg-input: #060d0a;
    --gold: #d4a853;
    --gold-light: #e6c068;
    --cream: #f5f0e8;
    --cream-muted: rgba(245, 240, 232, 0.6);
    --cream-faint: rgba(245, 240, 232, 0.45);
    --emerald-deep: #064e3b;
    --emerald-mid: #065f46;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Raleway', sans-serif;
    background-color: var(--bg-primary);
    color: var(--cream);
    line-height: 1.7;
    overflow-x: hidden;
}

.font-playfair {
    font-family: 'Playfair Display', serif;
}

.font-raleway {
    font-family: 'Raleway', sans-serif;
}

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

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

/* Gold gradient text utility */
.text-gold-gradient {
    background: linear-gradient(135deg, #d4a853 0%, #e6c068 50%, #d4a853 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Navigation
   ============================================ */
#navbar {
    background: transparent;
    transition: background 0.5s ease, box-shadow 0.5s ease, backdrop-filter 0.5s ease;
}

#navbar.scrolled {
    background: rgba(6, 13, 10, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(212, 168, 83, 0.1);
}

.nav-link {
    position: relative;
}

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

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

.nav-link:hover {
    color: var(--gold) !important;
}

/* Mobile Menu */
#mobile-menu {
    z-index: 50;
}

#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

.menu-line {
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

#menu-btn.active .menu-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

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

#menu-btn.active .menu-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
    width: 1.25rem;
    margin-right: 0;
}

.mobile-link {
    position: relative;
}

/* ============================================
   Hero Section
   ============================================ */
#hero {
    position: relative;
}

#hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--bg-primary), transparent);
    pointer-events: none;
}

/* ============================================
   Reveal Animations (progressive enhancement)
   ============================================ */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .reveal[data-revealed="false"] {
        opacity: 0;
        transform: translateY(30px);
    }
}

/* Default state: always visible */
.reveal {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal[data-revealed="false"] {
        opacity: 0;
        transform: translateY(30px);
    }
}

/* Hero entrance animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-fade-in {
    animation: fadeIn 1s ease forwards;
}

/* ============================================
   Section Dividers
   ============================================ */
section > .absolute.top-0:first-child {
    pointer-events: none;
}

/* ============================================
   Service Cards
   ============================================ */
.service-card {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
    transform: translateY(-4px);
}

/* ============================================
   Buttons
   ============================================ */
button, [type="submit"] {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
}

/* ============================================
   Form Styles
   ============================================ */
input:focus, textarea:focus {
    outline: none;
}

input::placeholder, textarea::placeholder {
    color: rgba(245, 240, 232, 0.25);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(212, 168, 83, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(212, 168, 83, 0.5);
}

/* ============================================
   Selection
   ============================================ */
::selection {
    background: rgba(212, 168, 83, 0.3);
    color: var(--cream);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    .font-playfair {
        line-height: 1.2;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    #navbar, #mobile-menu, .reveal[data-revealed="false"] {
        display: none !important;
    }

    body {
        background: white;
        color: #1a1a1a;
    }

    section {
        page-break-inside: avoid;
    }
}