/* 
 * Apple-Inspired Design System
 * Modern, Clean, Professional UI/UX
 */

/* ==================== Design Tokens ==================== */
:root {
    /* Professional Medical Color Palette */
    --primary-50: #f0f7fa;
    --primary-100: #dceef5;
    --primary-200: #b9dcea;
    --primary-300: #7ebfd9;
    --primary-400: #4da3c8;
    --primary-500: #1D546C;
    --primary-600: #174561;
    --primary-700: #133751;
    --primary-800: #0f2a41;
    --primary-900: #0C2B4E;
    
    /* Accent Colors */
    --accent-blue: #3498db;
    --accent-teal: #1abc9c;
    --accent-navy: #1A3D64;
    
    /* Neutral Grays - Professional */
    --white: #ffffff;
    --gray-50: #fafbfc;
    --gray-100: #f5f6f8;
    --gray-200: #e8eaed;
    --gray-300: #dadce0;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors - Medical Context */
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Font Sizes - Fluid Typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
    --text-3xl: clamp(1.875rem, 1.65rem + 1.125vw, 2.25rem);
    --text-4xl: clamp(2.25rem, 1.95rem + 1.5vw, 3rem);
    --text-5xl: clamp(3rem, 2.5rem + 2.5vw, 3.75rem);
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Elevation (Shadows) */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.1, 1);
    
    /* Blur Effects */
    --blur-sm: blur(4px);
    --blur-md: blur(12px);
    --blur-lg: blur(24px);
    --blur-xl: blur(40px);
    
    /* Secondary Colors */
    --secondary-500: #1A3D64;
    --secondary-600: #0C2B4E;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow-x: hidden;
}

/* ==================== Premium Navigation ==================== */
.apple-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 2px 8px rgba(29, 84, 108, 0.08);
    transition: all var(--transition-base);
}

.apple-nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
}

.logo-img {
    height: 140px;
    width: auto;
    object-fit: contain;
    margin-right: 8px;
}

.logo-text {
    font-size: var(--text-lg);
    font-weight: 600;
}

body {
    padding-top: 3.5rem;
}

.apple-logo {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--primary-900);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition: opacity var(--transition-fast);
}

.apple-logo:hover {
    opacity: 0.8;
}

.apple-nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
}

.apple-nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.apple-nav-link:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.apple-nav-link.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.apple-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-600);
    border-radius: var(--radius-full);
}

/* Mobile Menu Toggle */
.apple-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 1002;
    position: relative;
}

.apple-menu-toggle span {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: var(--gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.apple-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.4rem, 0.4rem);
}

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

.apple-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.4rem, -0.4rem);
}

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

.apple-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.5rem, -0.5rem);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.apple-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-2);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 1001;
}

.apple-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.apple-dropdown a,
.apple-dropdown-item-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--gray-700);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-primary);
}

.apple-dropdown a:hover,
.apple-dropdown-item-btn:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.apple-dropdown a i,
.apple-dropdown-item-btn i {
    width: 1.25rem;
    color: var(--gray-400);
}

.apple-dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--space-2) 0;
}

/* Alert Messages */
.apple-alert {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-4);
    border-left: 4px solid;
    position: relative;
}

.apple-alert-success {
    border-color: var(--success);
    background: var(--success-light);
}

.apple-alert-error {
    border-color: var(--error);
    background: var(--error-light);
}

.apple-alert-warning {
    border-color: var(--warning);
    background: var(--warning-light);
}

.apple-alert-info {
    border-color: var(--info);
    background: var(--info-light);
}

.apple-alert i {
    font-size: var(--text-xl);
}

.apple-alert-success i {
    color: var(--success);
}

.apple-alert-error i {
    color: var(--error);
}

.apple-alert-warning i {
    color: var(--warning);
}

.apple-alert-info i {
    color: var(--info);
}

.apple-alert-close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-3);
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.apple-alert-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--gray-700);
}

/* Footer */
.apple-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: var(--space-20);
}

.apple-footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.apple-footer-section h4 {
    color: white;
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.apple-footer-section h5 {
    color: white;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.apple-footer-section p {
    color: var(--gray-400);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.apple-footer-section a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--text-sm);
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

.apple-footer-section a:hover {
    color: white;
}

.apple-footer-social {
    display: flex;
    gap: var(--space-3);
}

.apple-footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.apple-footer-social a:hover {
    background: var(--gray-700);
    color: white;
    transform: translateY(-2px);
}

.apple-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-800);
    font-size: var(--text-sm);
}

.apple-footer-bottom div {
    display: flex;
    gap: var(--space-6);
}

.apple-footer-bottom a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.apple-footer-bottom a:hover {
    color: white;
}

/* ==================== Hero Section ==================== */
.apple-hero {
    padding-top: 8rem;
    padding-bottom: 6rem;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-900) 100%);
    position: relative;
    overflow: hidden;
}

.apple-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.apple-hero-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    text-align: center;
    position: relative;
    z-index: 1;
}

.apple-hero-title {
    font-size: var(--text-5xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.apple-hero-subtitle {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

/* ==================== Premium Buttons ==================== */
.apple-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: 500;
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    font-family: var(--font-primary);
}

.apple-btn-primary {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(29, 84, 108, 0.4);
}

.apple-btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(29, 84, 108, 0.5);
}

.apple-btn-primary:active {
    transform: translateY(0);
}

.apple-btn-secondary {
    background: white;
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
    box-shadow: var(--shadow-sm);
}

.apple-btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.apple-btn-ghost {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.apple-btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.apple-btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ==================== Premium Cards ==================== */
.apple-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.apple-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: var(--primary-200);
}

.apple-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.apple-card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--primary-900);
}

.apple-card-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

.apple-card-body {
    color: var(--gray-600);
    font-size: var(--text-sm);
    line-height: 1.7;
}

/* ==================== Glass Morphism ==================== */
.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

/* ==================== Input Fields ==================== */
.apple-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-family: var(--font-primary);
    color: var(--gray-900);
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    outline: none;
}

.apple-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.apple-input::placeholder {
    color: var(--gray-400);
}

/* ==================== Grid System ==================== */
.apple-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.apple-grid {
    display: grid;
    gap: var(--space-6);
}

.apple-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.apple-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ==================== Animations ==================== */
@keyframes fadeInUp {
    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);
    }
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-smooth) ease-out;
}

.animate-scale-in {
    animation: scaleIn var(--transition-base) ease-out;
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .apple-footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }
}

@media (max-width: 768px) {
    .apple-nav-container {
        padding: 0 var(--space-3);
        height: 3.5rem;
    }
    
    .logo-img {
        height: 32px !important;
        margin-right: 6px !important;
    }
    
    .logo-text {
        font-size: var(--text-base) !important;
    }
    
    .apple-menu-toggle {
        display: flex !important;
    }
    
    .apple-nav-menu {
        position: fixed;
        top: 3.5rem;
        left: 0;
        right: 0;
        height: auto;
        max-height: none;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-6) var(--space-4);
        box-shadow: var(--shadow-2xl);
        border-bottom: 1px solid var(--gray-200);
        gap: var(--space-3);
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 999;
    }
    
    .apple-nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    
    .apple-nav-menu > li {
        width: 100%;
    }
    
    .apple-nav-link {
        padding: 1rem 1.25rem;
        border-radius: var(--radius-xl);
        font-size: 1.125rem;
        font-weight: 500;
        display: flex;
        align-items: center;
        gap: var(--space-4);
        min-height: 56px;
        width: 100%;
    }
    
    .apple-nav-link:hover,
    .apple-nav-link.active {
        background: var(--primary-50);
        color: var(--primary-600);
    }
    
    .dropdown .apple-dropdown {
        position: static;
        display: block;
        visibility: visible;
        opacity: 1;
        transform: none;
        box-shadow: none;
        border: none;
        padding: var(--space-2) 0;
        margin-top: var(--space-2);
        margin-left: var(--space-4);
        background: var(--gray-50);
        border-radius: var(--radius-xl);
    }
    
    .dropdown .apple-dropdown a,
    .dropdown .apple-dropdown button {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
        min-height: 48px;
        display: flex;
        align-items: center;
        gap: var(--space-3);
    }
    
    body {
        padding-top: 3.5rem;
    }
    
    .apple-container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
    
    .apple-hero {
        padding-top: 6rem;
        padding-bottom: 4rem;
    }
    
    .apple-hero-title {
        font-size: var(--text-3xl);
    }
    
    .apple-hero-subtitle {
        font-size: var(--text-base);
    }
    
    .apple-card {
        padding: var(--space-4);
    }
    
    .apple-grid-2,
    .apple-grid-3 {
        grid-template-columns: 1fr;
    }
    
    .apple-footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .apple-footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .apple-footer-bottom div {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
    }
    
    .apple-btn-lg {
        padding: var(--space-3) var(--space-6);
        font-size: var(--text-base);
    }
    
    .apple-hero {
        padding-top: 5rem;
        padding-bottom: 3rem;
    }
}

/* ==================== Utility Classes ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-4 { gap: var(--space-4); }