:root {
    /* Color System - Inspired by nature and trust */
    --primary: #2d8659;
    --primary-dark: #1a472a;
    --primary-light: #5fb886;
    
    --secondary: #f4a261;
    --secondary-dark: #e76f51;
    
    --success: #2d8659;
    --warning: #f4a261;
    --danger: #e63946;
    
    --bg-main: #fafdf8;
    --bg-card: #ffffff;
    --bg-overlay: rgba(26, 71, 42, 0.95);
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    
    /* Typography */
    --font-display: 'Fredoka', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Borders */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(45, 134, 89, 0.08);
    --shadow-md: 0 4px 16px rgba(45, 134, 89, 0.12);
    --shadow-lg: 0 8px 32px rgba(45, 134, 89, 0.16);
    --shadow-xl: 0 16px 48px rgba(45, 134, 89, 0.24);
}

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

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

body {
    font-family: var(--font-body);
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Splash Screen */
.splash {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeOut 0.5s ease 2s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.splash-content {
    text-align: center;
    color: white;
}

.paw-animation {
    font-size: 4rem;
    animation: bounce 1s ease infinite;
}

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

.splash-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-top: var(--spacing-md);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.splash-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
    animation: fadeInUp 0.6s ease 0.5s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* App Container */
.app {
    min-height: 100vh;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.app.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--bg-card);
    border-bottom: 1px solid rgba(45, 134, 89, 0.1);
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.btn-back,
.btn-menu {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.btn-back:hover,
.btn-menu:hover {
    background: var(--bg-main);
    transform: scale(1.05);
}

.btn-back.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Screens */
.screen {
    display: none;
    animation: slideInRight 0.3s ease;
}

.screen.active {
    display: block;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.05) 0%, rgba(95, 184, 134, 0.05) 100%);
}

.hero-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Pet Selector */
.pet-selector {
    padding: var(--spacing-lg) var(--spacing-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.pet-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.pet-btn {
    background: var(--bg-card);
    border: 3px solid transparent;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.pet-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.pet-btn.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.05) 0%, rgba(95, 184, 134, 0.05) 100%);
}

.pet-icon {
    font-size: 3rem;
}

.pet-name {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Symptoms Section */
.symptoms-section {
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--bg-card);
}

.symptoms-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
}

.symptom-card {
    background: var(--bg-main);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-align: left;
}

.symptom-card:hover {
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.symptom-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.symptom-content {
    flex: 1;
}

.symptom-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.symptom-description {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Quick Actions */
.quick-actions {
    padding: var(--spacing-lg) var(--spacing-md);
}

.emergency-btn {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, var(--danger) 0%, #d62828 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.emergency-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.emergency-icon {
    font-size: 2rem;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.emergency-text {
    text-align: left;
    flex: 1;
}

.emergency-text strong {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
}

.emergency-text small {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Questions Screen */
.progress-bar {
    height: 4px;
    background: rgba(45, 134, 89, 0.1);
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    transition: width 0.3s ease;
    width: 0%;
}

.question-container {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.question-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.question-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.3;
}

.answers-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.answer-btn {
    background: var(--bg-card);
    border: 2px solid rgba(45, 134, 89, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.answer-btn:hover {
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

/* Result Screen */
.result-container {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.result-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    animation: scaleIn 0.5s ease;
}

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

.result-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.result-title.success { color: var(--success); }
.result-title.warning { color: var(--warning); }
.result-title.danger { color: var(--danger); }

.result-message {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.result-recommendations {
    background: var(--bg-main);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.result-recommendations h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

.result-recommendations ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.result-recommendations li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 1rem;
    color: var(--text-secondary);
}

.result-recommendations li::before {
    content: "✓";
    color: var(--primary);
    font-weight: bold;
    flex-shrink: 0;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: var(--spacing-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-text:hover {
    color: var(--primary);
}

.disclaimer {
    background: rgba(230, 57, 70, 0.1);
    border-left: 4px solid var(--danger);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: left;
}

.disclaimer strong {
    color: var(--danger);
}

/* Map Screen */
.map-header {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-bottom: 1px solid rgba(45, 134, 89, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.map-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.btn-location {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-location:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.map-container {
    height: 400px;
    width: 100%;
}

.vets-list {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.vet-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.vet-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.vet-name {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.25rem;
}

.vet-address {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.vet-distance {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
}

/* Menu Sidebar */
.menu-sidebar {
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-card);
    z-index: 1001;
    transition: right 0.3s ease;
    box-shadow: var(--shadow-xl);
}

.menu-sidebar.active {
    right: 0;
}

.menu-content {
    padding: var(--spacing-lg);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.menu-close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    margin-bottom: var(--spacing-md);
    transition: all 0.2s ease;
}

.menu-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.menu-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
}

.menu-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.menu-item:hover {
    background: var(--bg-main);
    color: var(--primary);
}

.menu-item span {
    font-size: 1.5rem;
}

.menu-footer {
    border-top: 1px solid rgba(45, 134, 89, 0.1);
    padding-top: var(--spacing-md);
}

.menu-disclaimer {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.menu-version {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* Responsive */
@media (min-width: 768px) {
    .symptoms-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .map-container {
        height: 500px;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .question-text {
        font-size: 2rem;
    }
}