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

/* Performance Optimizations */
html {
    scroll-behavior: smooth;
}

/* Reduce motion for users who prefer it (Accessibility) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Optimize rendering performance */
.hero-img,
.form-input,
.form-textarea,
.submit-btn,
.guests-table {
    will-change: transform;
}

/* GPU acceleration for animations */
.tab-btn,
.form-group,
.guests-table tbody tr {
    transform: translateZ(0);
    backface-visibility: hidden;
}

:root {
    /* Purple & Pink Color Palette */
    --primary-color: #9333ea;
    --primary-hover: #7c3aed;
    --primary-light: #f3e8ff;
    --secondary-color: #ec4899;
    --secondary-hover: #db2777;
    --secondary-light: #fce7f3;
    --accent-color: #a855f7;
    --accent-light: #f5f3ff;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #faf5ff;
    --bg-tertiary: #f3e8ff;
    --bg-gradient: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 50%, #fce7f3 100%);
    --bg-overlay: rgba(147, 51, 234, 0.6);
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-inverse: #ffffff;
    --text-accent: #7c3aed;
    
    /* Border Colors */
    --border-light: #e9d5ff;
    --border-medium: #d8b4fe;
    --border-dark: #a855f7;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
}

body {
    font-family: var(--font-family);
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="hearts" patternUnits="userSpaceOnUse" width="100" height="100"><circle cx="25" cy="25" r="1.5" fill="%23ec4899" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%239333ea" opacity="0.1"/><circle cx="50" cy="10" r="0.8" fill="%23a855f7" opacity="0.15"/><circle cx="10" cy="60" r="1.2" fill="%23ec4899" opacity="0.1"/><circle cx="90" cy="30" r="0.6" fill="%239333ea" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23hearts)"/></svg>') repeat;
    background-size: 150px 150px;
    z-index: -1;
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes float {
    0%, 100% { transform: translateX(0) translateY(0); }
    50% { transform: translateX(-5px) translateY(-5px); }
}

@keyframes heroZoom {
    0%, 100% { 
        transform: scale(1);
    }
    50% { 
        transform: scale(1.02);
    }
}

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

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

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmerEffect {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    50% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
    100% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
}

@keyframes textGlow {
    0% {
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    }
    100% {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5), 0 0 10px rgba(255, 255, 255, 0.3);
    }
}

@keyframes subtitleFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

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

@keyframes gradientPulse {
    0%, 100% {
        background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    }
    50% {
        background: linear-gradient(to bottom, var(--secondary-color), var(--accent-color));
    }
}

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

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

@keyframes emptyStatePulse {
    0%, 100% {
        border-color: var(--border-medium);
        transform: scale(1);
    }
    50% {
        border-color: var(--border-dark);
        transform: scale(1.02);
    }
}

@keyframes floatIcon {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

@keyframes counterPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes counterShake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Tab Navigation */
.tab-navigation {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(147, 51, 234, 0.1);
}

.tab-navigation .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.app-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tabs {
    display: flex;
    gap: var(--space-sm);
}

.tab-btn {
    background: rgba(255, 255, 255, 0.8);
    border: 2px solid var(--border-medium);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-accent);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tab-btn::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 0.5s;
}

.tab-btn:hover {
    background: linear-gradient(135deg, var(--accent-light), var(--secondary-light));
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.15);
}

.tab-btn:hover::before {
    left: 100%;
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.3);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Hero Section */
.hero-section {
    margin-bottom: var(--space-2xl);
}

.hero-image {
    position: relative;
    height: 400px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    margin: var(--space-lg) 0;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: slideInFromTop 1s ease-out;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shimmerEffect 3s ease-in-out infinite;
    z-index: 1;
    pointer-events: none;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: heroZoom 20s ease-in-out infinite, fadeIn 1.5s ease-out;
    transition: transform 0.3s ease;
}

.hero-img:hover {
    transform: scale(1.05);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-inverse);
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: textGlow 2s ease-in-out infinite alternate;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    animation: subtitleFloat 3s ease-in-out infinite;
}

/* Programmatically Generated Flowchart */
.flowchart-container {
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px rgba(147, 51, 234, 0.2);
    border: 2px solid var(--border-light);
}

.flowchart {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.flowchart::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(147, 51, 234, 0.3), rgba(236, 72, 153, 0.3), transparent);
    animation: flowchartGlow 4s ease-in-out infinite;
    z-index: 1;
}

.flowchart-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
    border: 2px solid var(--border-light);
    transition: all var(--transition-normal);
    animation: stepPulse 2s ease-in-out infinite;
}

.flowchart-step:nth-child(1) { animation-delay: 0s; }
.flowchart-step:nth-child(2) { animation-delay: 0.5s; }
.flowchart-step:nth-child(3) { animation-delay: 1s; }
.flowchart-step:nth-child(4) { animation-delay: 1.5s; }

.flowchart-step:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.3);
    border-color: var(--primary-color);
}

.flowchart-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    animation: iconRotate 3s ease-in-out infinite;
}

.flowchart-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-accent);
    margin-bottom: var(--space-xs);
}

.flowchart-desc {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    line-height: 1.4;
}

.flowchart-arrow {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    animation: arrowMove 2s ease-in-out infinite;
    position: relative;
    z-index: 2;
}

/* Flowchart Animations */
@keyframes flowchartGlow {
    0% {
        left: -100%;
    }
    50% {
        left: 100%;
    }
    100% {
        left: -100%;
    }
}

@keyframes stepPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

@keyframes iconRotate {
    0%, 100% {
        transform: rotate(0deg);
    }
    50% {
        transform: rotate(5deg);
    }
}

@keyframes arrowMove {
    0%, 100% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(5px);
    }
}

/* Form Section */
.form-section {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 20px 40px rgba(147, 51, 234, 0.1);
    margin-bottom: var(--space-2xl);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.form-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
    opacity: 0.3;
    z-index: -1;
    animation: gentle-spin 30s linear infinite;
}

@keyframes gentle-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.guest-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--space-xl);
    position: relative;
    animation: slideInLeft 0.6s ease-out;
    animation-fill-mode: both;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }

.form-group::before {
    content: '';
    position: absolute;
    top: 0;
    left: -20px;
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.form-group:focus-within::before {
    opacity: 1;
    animation: gradientPulse 2s ease-in-out infinite;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-accent);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
}

.form-label::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    opacity: 0.7;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-lg) var(--space-md);
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(10px);
    position: relative;
    box-shadow: 0 4px 15px rgba(147, 51, 234, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light), 0 8px 25px rgba(147, 51, 234, 0.25);
    transform: translateY(-3px) scale(1.02);
    background: linear-gradient(135deg, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.95));
}

.form-input:focus::placeholder,
.form-textarea:focus::placeholder {
    transform: translateY(-20px) scale(0.8);
    opacity: 0.7;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-sm);
    animation: slideInUp 0.5s ease-out;
    animation-fill-mode: both;
    animation-delay: 0.3s;
}

.char-counter {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.7);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(5px);
    transition: all var(--transition-fast);
}

.char-counter.warning {
    color: var(--accent-color);
    border-color: var(--accent-color);
    animation: counterPulse 1s ease-in-out infinite;
}

.char-counter.danger {
    color: #ef4444;
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    animation: counterShake 0.5s ease-in-out;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.error-message {
    display: block;
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.3);
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

.submit-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover), var(--secondary-hover));
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(147, 51, 234, 0.4);
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loader {
    margin-left: var(--space-sm);
}

/* Form Messages */
.form-messages {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    display: none;
}

.form-messages.success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
    display: block;
}

.form-messages.error {
    background-color: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
    display: block;
}

/* Guests Section */
.guests-section {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 20px 40px rgba(147, 51, 234, 0.1);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.guests-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--secondary-light) 0%, transparent 70%);
    opacity: 0.2;
    z-index: -1;
    animation: gentle-spin 40s linear infinite reverse;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    box-shadow: 0 20px 40px rgba(147, 51, 234, 0.1);
    animation: slideInUp 0.8s ease-out;
}

.guests-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: transparent;
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
}

.guests-table::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    z-index: 1;
}

.guests-table th,
.guests-table td {
    padding: var(--space-lg) var(--space-md);
    text-align: left;
    border-bottom: 1px solid rgba(147, 51, 234, 0.1);
    position: relative;
}

.guests-table th {
    background: linear-gradient(135deg, var(--accent-light), var(--secondary-light));
    font-weight: 700;
    color: var(--text-accent);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 2px 10px rgba(147, 51, 234, 0.1);
}

.guests-table th::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.guests-table td {
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-normal);
    background: rgba(255, 255, 255, 0.6);
}

.guests-table tbody tr {
    transition: all var(--transition-normal);
    animation: tableRowFadeIn 0.5s ease-out;
    animation-fill-mode: both;
}

.guests-table tbody tr:nth-child(even) td {
    background: rgba(255, 255, 255, 0.8);
}

.guests-table tbody tr:hover {
    background: linear-gradient(135deg, var(--accent-light), var(--secondary-light));
    transform: translateX(5px);
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.15);
}

.guests-table tbody tr:hover td {
    color: var(--text-accent);
    background: transparent;
}

.guests-table tbody tr:last-child td {
    border-bottom: none;
}

.guests-table tbody tr:first-child {
    animation-delay: 0.1s;
}

.guests-table tbody tr:nth-child(2) {
    animation-delay: 0.2s;
}

.guests-table tbody tr:nth-child(3) {
    animation-delay: 0.3s;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--border-medium);
    margin: var(--space-xl) 0;
    animation: emptyStatePulse 3s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.empty-state::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary-light), transparent);
    opacity: 0.3;
    animation: gentle-spin 20s linear infinite;
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.empty-state p {
    font-size: var(--font-size-base);
    position: relative;
    z-index: 1;
    opacity: 0.8;
}

.empty-state::after {
    content: '📝';
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: var(--font-size-2xl);
    opacity: 0.2;
    animation: floatIcon 4s ease-in-out infinite;
}

/* Load More Button */
.load-more-btn {
    background: linear-gradient(135deg, var(--accent-light), var(--secondary-light));
    color: var(--text-accent);
    border: 2px solid var(--border-medium);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 15px rgba(147, 51, 234, 0.2);
}

.load-more-btn:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(147, 51, 234, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .tab-navigation .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .form-section,
    .guests-section {
        padding: var(--space-lg);
    }
    
    .guests-table th,
    .guests-table td {
        padding: var(--space-sm);
        font-size: var(--font-size-sm);
    }
    
    /* Responsive Flowchart */
    .flowchart {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .flowchart-arrow {
        transform: rotate(90deg);
        margin: var(--space-xs) 0;
    }
    
    .flowchart-step {
        margin: var(--space-xs) 0;
    }
    
    .flowchart-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
}

/* Animation for smooth transitions */
.tab-content {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}