:root {
    --bg-color: #ffffff;
    --text-color: #1d1d1f;
    --secondary-text: #86868b;
    --accent-color: #0071e3;
    --card-bg: #f5f5f7;
    --border-radius: 12px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    -webkit-font-smoothing: antialiased;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.apple-logo {
    width: 40px;
    height: 40px;
    fill: var(--text-color);
}

#app {
    width: 100%;
    max-width: 440px;
    padding: 40px 20px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

#app.loaded {
    opacity: 1;
    transform: translateY(0);
}

.step {
    display: none;
    flex-direction: column;
    animation: fadeIn 0.6s ease-out forwards;
}

.step.active {
    display: flex;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    text-align: center;
}

p.subtitle {
    font-size: 19px;
    color: var(--secondary-text);
    margin-bottom: 40px;
    text-align: center;
    line-height: 1.4;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--secondary-text);
    margin-bottom: 8px;
    text-transform: uppercase;
}

input[type="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 16px;
    border: 1px solid #d2d2d7;
    border-radius: var(--border-radius);
    font-size: 17px;
    outline: none;
    transition: var(--transition);
}

input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.options {
    display: grid;
    gap: 16px;
    margin-bottom: 32px;
}

.option-card {
    padding: 24px;
    background: var(--card-bg);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.option-card:hover {
    background: #ebebeb;
}

.option-card.selected {
    border-color: var(--accent-color);
    background: #ffffff;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
}

.option-info h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.option-price {
    font-size: 17px;
    font-weight: 600;
}

.summary-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--border-radius);
    margin-bottom: 32px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--secondary-text);
}

.summary-row.total {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #d2d2d7;
    font-size: 21px;
    font-weight: 700;
    color: var(--text-color);
}

button.primary {
    width: 100%;
    padding: 18px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 20px;
    /* More rounded Apple style */
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

button.primary:hover {
    background-color: #0077ed;
    transform: scale(1.01);
}

button.primary.disabled {
    background-color: #f5f5f7 !important;
    color: #86868b !important;
    cursor: not-allowed !important;
    transform: none !important;
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 24px;
    color: var(--secondary-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0.7;
}

.back-link:hover {
    color: var(--accent-color);
    opacity: 1;
}

input:disabled {
    cursor: not-allowed;
    background-color: #f5f5f7;
    color: #86868b;
}

/* Specific styling for region cards to match selection logic */
#step-4 .option-card.selected {
    border-color: var(--accent-color);
    background: #ffffff;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
}