/* Main CSS - Core Styles for Avant MedSpa */

/* ====================================
   CSS Variables
   ==================================== */
:root {
    /* Brand Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #ff0066 0%, #ff4494 100%);
    
    /* Solid Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #ff0066;
    --dark-bg: #0a0a0a;
    --light-bg: #fafafa;
    --white: #ffffff;
    --black: #000000;
    
    /* Text Colors */
    --text-primary: #333333;
    --text-secondary: #5a6c7d;
    --text-light: rgba(255, 255, 255, 0.9);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-xxl: 8rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-light: 200;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-xl: 25px;
    --radius-full: 50px;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
}

/* ====================================
   Reset & Base Styles
   ==================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* Main content spacing for fixed header */
main {
    /* Default padding-top, will be adjusted by JS based on actual header height */
    padding-top: 140px;
    min-height: 100vh;
}

/* Pages with hero sections */
.page-with-hero main {
    padding-top: 0;
}

/* Hero sections that need full viewport */
.hero {
    min-height: 100vh;
    padding-top: 140px;
    margin-top: 0;
    position: relative;
}

/* Alternative hero style for full-bleed heroes */
.hero-fullscreen {
    height: 100vh;
    padding-top: 140px;
    margin-top: -140px;
    box-sizing: border-box;
}

/* ====================================
   Typography
   ==================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-light);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 5rem);
    letter-spacing: -2px;
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    letter-spacing: -1px;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 2rem);
}

h5 {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
}

h6 {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
}

p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--secondary-color);
}

/* ====================================
   Utility Classes
   ==================================== */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ====================================
   Buttons
   ==================================== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-gradient);
    color: var(--white);
    border-color: transparent;
}

.btn-accent {
    background: var(--accent-gradient);
    color: var(--white);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 0, 102, 0.3);
}

/* ====================================
   Cards
   ==================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

/* ====================================
   Forms
   ==================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1.25rem;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ====================================
   Animations
   ==================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Animation Classes */
.animate-fadeIn {
    animation: fadeIn 1s ease forwards;
}

.animate-fadeInUp {
    animation: fadeInUp 1s ease forwards;
}

.animate-fadeInDown {
    animation: fadeInDown 1s ease forwards;
}

.animate-scaleIn {
    animation: scaleIn 0.5s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

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

/* ====================================
   Loading States
   ==================================== */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ====================================
   Accessibility
   ==================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--dark-bg);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 0;
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ====================================
   Print Styles
   ==================================== */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a {
        text-decoration: underline;
    }
    
    .btn {
        border: 1px solid currentColor;
    }
}