@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Colors */
    --color-bg: #f8fafb;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-primary: #0d0d0d;
    --color-primary-hover: #1a1a1a;
    --color-secondary: #6b7280;
    --color-tertiary: #9ca3af;
    --color-accent: #0066ff;
    --color-accent-hover: #0052cc;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
    --color-divider: #f3f4f6;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-mono: 'JetBrains Mono', monospace;
    --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;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Spacing */
    --space-px: 1px;
    --space-0: 0;
    --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;
    --space-32: 8rem;
    
    /* Sizing */
    --size-4: 1rem;
    --size-6: 1.5rem;
    --size-8: 2rem;
    --size-10: 2.5rem;
    --size-12: 3rem;
    --size-16: 4rem;
    --size-20: 5rem;
    --size-24: 6rem;
    
    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    --radius-base: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-none: none;
    --transition-all: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-opacity: opacity 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-transform: transform 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-colors: color 150ms cubic-bezier(0.4, 0, 0.2, 1), background-color 150ms cubic-bezier(0.4, 0, 0.2, 1), border-color 150ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-dropdown: 10;
    --z-modal: 20;
    --z-popover: 30;
    --z-tooltip: 40;
    --z-toast: 50;
}

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

html {
    height: 100%;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    font-variant-ligatures: none;
}

body {
    height: 100%;
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-primary);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}

/* Header with Advanced Animations */
.app-header {
    text-align: center;
    margin-bottom: var(--space-12);
    padding-top: var(--space-16);
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(0, 102, 255, 0.05) 0%, transparent 70%);
    transform: translateX(-50%) translateY(-20%);
    animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { opacity: 0.3; transform: translateX(-50%) translateY(-20%) scale(1); }
    50% { opacity: 0.6; transform: translateX(-50%) translateY(-20%) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.025em;
    line-height: var(--line-height-tight);
    color: var(--color-primary);
    margin-bottom: var(--space-6);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

.hero-word {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px) rotateX(90deg);
    animation: wordReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transform-origin: center bottom;
}

@keyframes wordReveal {
    0% {
        opacity: 0;
        transform: translateY(30px) rotateX(90deg) scale(0.8);
    }
    50% {
        opacity: 0.8;
        transform: translateY(10px) rotateX(45deg) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotateX(0deg) scale(1);
    }
}

.hero-word:first-child {
    font-size: 1.2em;
    animation: emojiPulse 2s ease-in-out infinite;
}

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

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    font-weight: var(--font-weight-medium);
    max-width: 32rem;
    margin: 0 auto var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.hero-line {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    animation: lineReveal 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes lineReveal {
    0% {
        opacity: 0;
        transform: translateY(20px);
        filter: blur(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0px);
    }
}

.hero-decoration {
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    margin: 0 auto;
    border-radius: var(--radius-full);
    opacity: 0;
    transform: scaleX(0);
    animation: decorationReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    position: relative;
    overflow: hidden;
}

.hero-decoration::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: decorationShine 3s ease-in-out infinite;
}

@keyframes decorationReveal {
    0% {
        opacity: 0;
        transform: scaleX(0);
    }
    100% {
        opacity: 1;
        transform: scaleX(1);
    }
}

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

/* Responsive Header */
@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xl);
        flex-direction: row;
        gap: var(--space-2);
    }
    
    .hero-decoration {
        width: 80px;
        height: 5px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: var(--font-size-3xl);
        gap: var(--space-2);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
}

/* Main Content */
.main-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    min-height: 600px;
    position: relative;
    backdrop-filter: blur(8px);
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* Screen Management */
.screen {
    display: none;
    min-height: 600px;
    animation: fadeIn 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-all);
    white-space: nowrap;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-surface);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xs);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-sm);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    border-radius: var(--radius-xl);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-surface);
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Form Styles */
.form-container {
    max-width: 42rem;
    margin: 0 auto;
    padding: var(--space-8);
}

.form-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.form-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.form-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
    font-weight: var(--font-weight-medium);
}

/* Progress Indicator */
.progress-container {
    margin-bottom: var(--space-10);
}

.step-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    position: relative;
}

.step-indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-divider);
    transform: translateY(-50%);
    z-index: 1;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    position: relative;
    z-index: 2;
    background: var(--color-bg);
    padding: 0 var(--space-2);
    min-width: 0;
    flex: 1;
}

.step-circle {
    width: var(--size-8);
    height: var(--size-8);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-tertiary);
    transition: var(--transition-all);
}

.step-item.active .step-circle {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-surface);
    box-shadow: var(--shadow-md);
}

.step-item.completed .step-circle {
    background: var(--color-success);
    border-color: var(--color-success);
    color: var(--color-surface);
}

.step-item.completed .step-circle::before {
    content: '✓';
    font-size: var(--font-size-sm);
}

.step-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-tertiary);
    text-align: center;
    line-height: var(--line-height-tight);
}

.step-item.active .step-label {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.step-item.completed .step-label {
    color: var(--color-success);
}

/* Progress Bar */
.progress-bar {
    height: 8px;
    background: var(--color-divider);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-full);
    transition: width 600ms cubic-bezier(0.16, 1, 0.3, 1);
    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, 0.3), transparent);
    animation: shimmer 2s infinite;
}

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

/* Form Groups and Fields */
.form-step {
    display: none;
    animation: slideIn 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.form-step.active {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.step-header {
    margin-bottom: var(--space-8);
    text-align: center;
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.step-description {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
    max-width: 28rem;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    line-height: var(--line-height-normal);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-primary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-colors);
    appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgb(0 102 255 / 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-tertiary);
}

.form-textarea {
    resize: vertical;
    min-height: 5rem;
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1rem 1rem;
    padding-right: var(--space-10);
}

/* Navigation */
.form-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-10);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-divider);
}

/* Dashboard Cards */
.dashboard-container {
    padding: var(--space-8);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.dashboard-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.dashboard-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: var(--transition-all);
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
    transform: scaleX(0);
    transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.dashboard-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.dashboard-card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.card-icon {
    font-size: var(--font-size-xl);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.card-description {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-6);
}

/* Loading Screen */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16) var(--space-8);
    text-align: center;
}

.spinner {
    width: var(--size-16);
    height: var(--size-16);
    border: 3px solid var(--color-divider);
    border-top: 3px solid var(--color-accent);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-6);
}

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

.loading-message {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.loading-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
}

/* Demo Elements */
.demo-banner {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 1px solid #f59e0b;
    color: #92400e;
    padding: var(--space-4);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-8);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.demo-scenarios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.demo-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    cursor: pointer;
    transition: var(--transition-all);
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.demo-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
    opacity: 0;
    transition: opacity 300ms ease;
    pointer-events: none;
}

.demo-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.demo-card:hover::after {
    opacity: 0.03;
}

.demo-card h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.demo-card p {
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
}

/* Strategy Output */
.strategy-container {
    max-width: 56rem;
    margin: 0 auto;
    padding: var(--space-8);
}

.strategy-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.strategy-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.strategy-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    margin-bottom: var(--space-6);
}

.strategy-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

.strategy-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-xs);
    border-left: 4px solid var(--color-accent);
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.section-icon {
    width: var(--size-8);
    height: var(--size-8);
    background: var(--color-primary);
    color: var(--color-surface);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.section-content p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

.section-content ul {
    color: var(--color-secondary);
    padding-left: var(--space-5);
    line-height: var(--line-height-relaxed);
}

.section-content li {
    margin-bottom: var(--space-2);
}

/* Chart Placeholder */
.chart-placeholder {
    width: 100%;
    height: 12rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-tertiary);
    font-weight: var(--font-weight-medium);
    margin: var(--space-6) 0;
    position: relative;
    overflow: hidden;
}

.chart-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 3s infinite;
}

/* Tags */
.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-surface);
    background: var(--color-primary);
    border-radius: var(--radius-full);
    margin-right: var(--space-2);
    margin-bottom: var(--space-2);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Responsive Design */
@media (max-width: 640px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
    
    .app-header {
        padding-top: var(--space-8);
        margin-bottom: var(--space-8);
    }
    
    .app-header h1 {
        font-size: var(--font-size-3xl);
    }
    
    .form-container {
        padding: var(--space-4);
    }
    
    .dashboard-container {
        padding: var(--space-4);
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .demo-scenarios {
        grid-template-columns: 1fr;
    }
    
    .strategy-container {
        padding: var(--space-4);
    }
    
    .strategy-section {
        padding: var(--space-6);
    }
    
    .form-navigation {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .form-navigation .btn {
        width: 100%;
    }
    
    .step-indicator {
        margin-bottom: var(--space-4);
    }
    
    .step-label {
        font-size: 0.625rem;
    }
}