* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: #000000;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: 0 auto;
    padding: 12px 0 0 0;
    position: relative;
}

/* Progress Container */
.progress-container {
    display: flex;
    justify-content: center;
    padding: 32px 0;
    position: sticky;
    top: 0;
    background-color: #ffffff;
    z-index: 10;
}

.progress-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #e0e0e0;
    transition: 0.3s ease;
}

.dot.active {
    background-color: #ffd700;
}

/* Content Container */
.content-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 24px 0;
    min-height: 0;
}

/* Step Styles */
.step {
    display: none;
    opacity: 0;
    transform: translateX(20px);
    transition: all 0.3s ease;
}

.step.active {
    display: block;
    opacity: 1;
    transform: translateX(0);
}

.step-content {
    text-align: center;
    max-width: 320px;
    margin: 0 auto;
    width: 100%;
}

/* Typography */
.subtitle {
    font-size: 14px;
    color: #888888;
    margin-bottom: 32px;
    font-weight: 400;
}

.step-title {
    font-size: 24px;
    font-weight: 600;
    color: #000000;
    margin-bottom: 48px;
    line-height: 1.3;
}

/* Options Container */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 48px;
}

.color-options {
    flex-direction: row;
    justify-content: center;
    gap: 24px;
}

.price-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Navigation */
.navigation {
    display: flex;
    justify-content: space-between;
    padding: 24px 0;
    position: sticky;
    bottom: 0;
    background-color: #ffffff;
    margin-top: auto;
}

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

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

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

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid #e0e0e0;
    border-top: 2px solid #000000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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