/* FairTalkAI Mobile-First App Experience */

/* Core Variables */
:root {
    /* App-like color palette */
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --primary-dark: #5F3DC4;
    --secondary: #00B894;
    --secondary-light: #00CEC9;
    --accent: #E17055;
    --accent-light: #FDCB6E;
    
    /* Modern gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #56FFA4 0%, #59BC86 100%);
    --gradient-warning: linear-gradient(135deg, #FFB347 0%, #FFCC70 100%);
    --gradient-danger: linear-gradient(135deg, #FF6B9D 0%, #C44569 100%);
    --gradient-info: linear-gradient(135deg, #3EECFF 0%, #30A7D7 100%);
    
    /* Glass morphism */
    --glass-bg: rgba(255, 255, 255, 0.125);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Shadows for depth */
    --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-2: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-3: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-4: 0 16px 32px rgba(0, 0, 0, 0.18);
    
    /* Typography */
    --text-primary: #2D3748;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --text-white: #FFFFFF;
    --text-inverse: #1A202C;
    
    /* Spacing (8px base) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    
    /* Additional spacing for logo system */
    --space-7: 28px;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-base: 0.2s ease-out;
    --transition-slow: 0.3s ease-out;
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Mobile-First Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--gradient-primary);
    min-height: 100vh;
    color: var(--text-white);
    line-height: 1.5;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Adaptive Logo System - Responsive across all devices */
.adaptive-logo-container {
    width: 160px;
    height: 160px;
    background: var(--gradient-success);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.adaptive-logo {
    width: 120px;
    height: 120px;
    transition: all 0.3s ease;
}

/* Mobile (small phones) - Smaller logo for compact screens */
@media (max-width: 375px) {
    .adaptive-logo-container {
        width: 120px;
        height: 120px;
        margin: 0 auto var(--space-4);
    }
    
    .adaptive-logo {
        width: 90px;
        height: 90px;
    }
}

/* Mobile (phones) - Standard mobile size */
@media (min-width: 376px) and (max-width: 767px) {
    .adaptive-logo-container {
        width: 140px;
        height: 140px;
        margin: 0 auto var(--space-5);
    }
    
    .adaptive-logo {
        width: 105px;
        height: 105px;
    }
}

/* Tablet Portrait - Medium size */
@media (min-width: 768px) and (max-width: 1023px) {
    .adaptive-logo-container {
        width: 180px;
        height: 180px;
        margin: 0 auto var(--space-7);
    }
    
    .adaptive-logo {
        width: 135px;
        height: 135px;
    }
}

/* Desktop - Large size for better visibility */
@media (min-width: 1024px) and (max-width: 1439px) {
    .adaptive-logo-container {
        width: 200px;
        height: 200px;
        margin: 0 auto var(--space-8);
    }
    
    .adaptive-logo {
        width: 150px;
        height: 150px;
    }
}

/* Large Desktop - Maximum size for high-res displays */
@media (min-width: 1440px) {
    .adaptive-logo-container {
        width: 220px;
        height: 220px;
        margin: 0 auto var(--space-10);
    }
    
    .adaptive-logo {
        width: 165px;
        height: 165px;
    }
}

/* Landscape orientation adjustments */
@media (orientation: landscape) and (max-height: 500px) {
    .adaptive-logo-container {
        width: 100px;
        height: 100px;
        margin: 0 auto var(--space-3);
    }
    
    .adaptive-logo {
        width: 75px;
        height: 75px;
    }
}

/* Comprehensive Responsive Design System */

/* Typography Responsive Scaling */
.section-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    line-height: 1.2;
    margin-bottom: clamp(1rem, 3vw, 2rem);
}

.hero-title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    line-height: 1.1;
    margin-bottom: clamp(0.75rem, 2vw, 1.5rem);
}

.feature-title {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    line-height: 1.3;
}

.feature-description {
    font-size: clamp(0.875rem, 2vw, 1rem);
    line-height: 1.5;
}

/* Responsive Layout Grid */
.feature-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }
}

@media (min-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (min-width: 1200px) {
    .feature-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-6);
    }
}

/* Responsive Cards */
.feature-card, .step-card, .hero-card {
    padding: clamp(1rem, 3vw, 2rem);
    margin-bottom: clamp(1rem, 2vw, 1.5rem);
}

.feature-icon {
    width: clamp(3rem, 8vw, 4rem);
    height: clamp(3rem, 8vw, 4rem);
    margin-bottom: clamp(0.75rem, 2vw, 1rem);
}

/* Responsive Content Sections */
.content-section {
    padding: clamp(1rem, 4vw, 2rem);
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

/* Mobile App Container Responsive */
.app-container {
    max-width: 100%;
    margin: 0 auto;
}

@media (min-width: 428px) {
    .app-container {
        max-width: 428px;
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.3);
    }
}

@media (min-width: 768px) {
    .app-container {
        max-width: 600px;
    }
}

@media (min-width: 1024px) {
    .app-container {
        max-width: 800px;
    }
}

/* Responsive Navigation */
.app-header {
    padding: clamp(0.75rem, 2vw, 1.5rem);
}

.header-title {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
}

/* Responsive Buttons */
.btn-app, .support-button {
    padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 4vw, 2rem);
    font-size: clamp(0.875rem, 2vw, 1rem);
    border-radius: clamp(0.5rem, 2vw, 1rem);
}

/* Status Badge Responsive */
.status-badge {
    padding: clamp(0.25rem, 1vw, 0.5rem) clamp(0.5rem, 2vw, 0.75rem);
    font-size: clamp(0.75rem, 1.5vw, 0.875rem);
}

/* Process Steps Responsive */
.process-steps {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }
}

@media (min-width: 1024px) {
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
}

.step-number {
    width: clamp(2.5rem, 6vw, 3.5rem);
    height: clamp(2.5rem, 6vw, 3.5rem);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
}

/* Responsive Form Elements */
.form-group {
    margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.form-input, .form-textarea {
    padding: clamp(0.75rem, 2vw, 1rem);
    font-size: clamp(0.875rem, 2vw, 1rem);
    border-radius: clamp(0.5rem, 1.5vw, 0.75rem);
}

/* Responsive Spacing */
.hero-section {
    padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 3vw, 2rem);
    margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

/* Ultra-wide screen optimizations */
@media (min-width: 1440px) {
    .app-container {
        max-width: 1000px;
    }
    
    .feature-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-8);
    }
    
    .content-section {
        padding: clamp(2rem, 3vw, 3rem);
    }
}

/* High DPI display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .feature-icon {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
    
    .adaptive-logo {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Mobile App Container */
.app-container {
    max-width: 428px;
    margin: 0 auto;
    min-height: 100vh;
    background: var(--gradient-primary);
    position: relative;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.3);
}

/* Mobile Status Bar Simulation */
.status-bar {
    height: 44px;
    background: rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-4);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-white);
}

.status-time {
    display: flex;
    align-items: center;
}

.status-indicators {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* App Header */
.app-header {
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-button {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    cursor: pointer;
}

.back-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-white);
}

.header-action {
    width: 32px;
    height: 32px;
}

/* Content Areas */
.app-content {
    padding: var(--space-4);
    min-height: calc(100vh - 140px);
}

.content-section {
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--space-4);
    text-align: center;
}

.section-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    margin-bottom: var(--space-6);
    line-height: 1.4;
}

/* Mobile App Cards */
.app-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-2);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.app-card:active {
    transform: scale(0.98);
    transition: var(--transition-fast);
}

.app-card-interactive {
    cursor: pointer;
    transition: var(--transition-bounce);
}

.app-card-interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-3);
}

.app-card-interactive:active {
    transform: scale(0.97);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-success);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--text-white);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: var(--space-2);
}

.card-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.4;
}

/* Mobile App Buttons */
.btn-app {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-white);
    background: var(--gradient-primary);
    cursor: pointer;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-2);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 52px;
}

.btn-app:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-3);
}

.btn-app:active {
    transform: scale(0.98);
    transition: var(--transition-fast);
}

.btn-app::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.btn-app:active::before {
    left: 100%;
}

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

.btn-success {
    background: var(--gradient-success);
}

.btn-warning {
    background: var(--gradient-warning);
}

.btn-danger {
    background: var(--gradient-danger);
}

.btn-info {
    background: var(--gradient-info);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: none;
}

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

/* Icon buttons */
.btn-icon {
    width: 48px;
    height: 48px;
    min-height: auto;
    border-radius: var(--radius-full);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.btn-sm {
    padding: var(--space-3) var(--space-5);
    font-size: 14px;
    min-height: 40px;
}

.btn-lg {
    padding: var(--space-5) var(--space-8);
    font-size: 18px;
    min-height: 60px;
}

/* Progress Elements */
.progress-ring {
    width: 120px;
    height: 120px;
    position: relative;
}

.progress-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring circle {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
}

.progress-ring .bg {
    stroke: rgba(255, 255, 255, 0.2);
}

.progress-ring .progress {
    stroke: url(#gradient);
    stroke-dasharray: 251.2;
    stroke-dashoffset: 251.2;
    transition: stroke-dashoffset 1s ease-in-out;
}

/* Achievement Badges */
.achievement-badge {
    display: inline-flex;
    align-items: center;
    background: var(--success-gradient);
    color: var(--text-white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-soft);
    animation: pulse 2s infinite;
}

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

/* Interactive Cards */
.interactive-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-large);
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.interactive-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.interactive-card:hover::before {
    opacity: 0.1;
}

.interactive-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-strong);
}

/* Mobile Star Rating */
.star-rating {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    align-items: center;
    padding: var(--space-4) 0;
}

.star {
    font-size: 32px;
    cursor: pointer;
    transition: var(--transition-bounce);
    color: rgba(255, 255, 255, 0.3);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.star:hover,
.star.active {
    color: #FFD700;
    transform: scale(1.15);
    text-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.star:active {
    transform: scale(1.3);
    transition: var(--transition-fast);
}

.rating-feedback {
    text-align: center;
    margin-top: var(--space-3);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: var(--space-3);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--text-white);
    font-size: 16px;
    transition: var(--transition-base);
    font-family: inherit;
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--text-white);
    font-size: 16px;
    transition: var(--transition-base);
    font-family: inherit;
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 50%;
    color: var(--text-white);
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
    z-index: 1000;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-strong);
}

/* Navigation */
.nav-gamified {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 0;
}

.nav-gamified .nav-link {
    color: var(--text-white);
    text-decoration: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.nav-gamified .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Form Elements */
.form-control-gamified {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 16px;
    color: var(--text-white);
    font-size: 16px;
    transition: var(--transition);
}

.form-control-gamified::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-control-gamified:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Loading Animations */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-left: 4px solid var(--text-white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Notification Toast */
.toast-gamified {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 16px 24px;
    color: var(--text-white);
    box-shadow: var(--shadow-medium);
    transform: translateX(100%);
    transition: var(--transition);
    z-index: 1001;
}

.toast-gamified.show {
    transform: translateX(0);
}

/* Progress Indicators */
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-4) 0;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-success);
    border-radius: var(--radius-full);
    transition: width 0.8s ease-out;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-circle {
    width: 80px;
    height: 80px;
    position: relative;
    margin: 0 auto;
}

.progress-circle svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.progress-circle circle {
    fill: none;
    stroke-width: 6;
    stroke-linecap: round;
}

.progress-bg {
    stroke: rgba(255, 255, 255, 0.2);
}

.progress-stroke {
    stroke: url(#progressGradient);
    stroke-dasharray: 251.2;
    stroke-dashoffset: 251.2;
    transition: stroke-dashoffset 1s ease-out;
}

/* Achievement System */
.achievement {
    background: var(--gradient-success);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: achievementPulse 0.6s ease-out;
}

@keyframes achievementPulse {
    0% { transform: scale(0.9); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

.achievement-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.achievement-text {
    flex: 1;
}

.achievement-title {
    font-weight: 600;
    color: var(--text-white);
    font-size: 16px;
}

.achievement-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-white);
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-3);
    transition: var(--transition-bounce);
    z-index: 1000;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-4);
}

.fab:active {
    transform: scale(0.95);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 428px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: var(--space-3) var(--space-4);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.nav-item.active {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.1);
}

.nav-item:hover {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.05);
}

.nav-icon {
    font-size: 24px;
}

.nav-label {
    font-size: 12px;
    font-weight: 500;
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-left: 4px solid var(--text-white);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--text-white);
    font-weight: 600;
    margin-top: var(--space-4);
    text-align: center;
}

/* Notification Toast */
.toast {
    position: fixed;
    top: var(--space-6);
    left: var(--space-4);
    right: var(--space-4);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    color: var(--text-white);
    box-shadow: var(--shadow-3);
    transform: translateY(-100px);
    transition: var(--transition-bounce);
    z-index: 1001;
}

.toast.show {
    transform: translateY(0);
}

.toast.success {
    border-left: 4px solid var(--secondary);
}

.toast.error {
    border-left: 4px solid var(--accent);
}

.toast.warning {
    border-left: 4px solid var(--accent-light);
}

/* Responsive Design */
@media (min-width: 768px) {
    .app-container {
        max-width: 768px;
        box-shadow: 0 0 80px rgba(0, 0, 0, 0.2);
    }
    
    .app-content {
        padding: var(--space-8);
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .btn-app {
        max-width: 320px;
        margin: 0 auto var(--space-3);
    }
}

@media (min-width: 1024px) {
    .app-container {
        max-width: 1024px;
        background: transparent;
        box-shadow: none;
    }
    
    body {
        background: var(--gradient-primary);
    }
    
    .app-content {
        padding: var(--space-12);
        max-width: 600px;
        margin: 0 auto;
    }
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-gradient);
}

/* Micro-interactions */
.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}