/* ===== Design System ===== */
:root {
    /* Colors - Minimal & Professional */
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-text-subtle: #9a9a9a;
    --color-border: #e5e5e5;
    --color-accent: #2c3e50;
    --color-accent-light: #3498db;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;

    /* Borders & Shadows */
    --radius-sm: 6px;
    --radius-md: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

/* ===== Typography ===== */
h1 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    color: var(--color-text);
}

p {
    color: var(--color-text);
    line-height: 1.7;
}

a {
    color: var(--color-accent-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent);
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: 640px;
}

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-content {
    padding: var(--space-lg);
}

/* ===== Header Section ===== */
.header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-md);
}

.header-main {
    flex: 1;
    min-width: 0;
}

.domain-title {
    margin-bottom: var(--space-xs);
    word-break: break-word;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.status-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-text-subtle);
    border-radius: 50%;
}

.reference {
    flex-shrink: 0;
    text-align: right;
}

.reference-label {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-subtle);
    margin-bottom: 4px;
}

.reference-code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background-color: var(--color-bg);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* ===== Content Section ===== */
.intro {
    margin-bottom: var(--space-md);
}

.intro p {
    margin-bottom: var(--space-sm);
}

.intro p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* ===== Section Title ===== */
.section-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.section-label span {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-subtle);
}

.section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
}

/* ===== Contact Box ===== */
.contact-box {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.contact-info {
    min-width: 200px;
}

.contact-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-subtle);
    margin-bottom: 4px;
}

.contact-email {
    font-weight: 600;
    font-size: 1rem;
    word-break: break-word;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background-color: var(--color-accent);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.15s ease;
}

.btn:hover {
    background-color: var(--color-accent-light);
    color: #fff;
    transform: translateY(-1px);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

/* ===== Footer / Legal ===== */
.legal {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.legal-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.legal p {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin-bottom: var(--space-sm);
}

.legal p:last-child {
    margin-bottom: 0;
}

/* ===== Responsive ===== */
@media (max-width: 540px) {
    body {
        padding: var(--space-sm);
    }

    .card-content {
        padding: var(--space-md);
    }

    h1 {
        font-size: 1.375rem;
    }

    .header {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .reference {
        text-align: left;
    }

    .contact-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}