/* --- CSS VARIABLES (Light Mode Default) --- */
:root {
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border-color: #e5e7eb;
    --icon-bg: #eff6ff;
    --icon-color: #2563eb;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* --- DARK MODE (Automatic) --- */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111827;
        --card-bg: #1f2937;
        --text-main: #f9fafb;
        --text-muted: #9ca3af;
        --primary: #3b82f6;
        --primary-hover: #60a5fa;
        --border-color: #374151;
        --icon-bg: #374151;
        --icon-color: #60a5fa;
        --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

/* --- LAYOUT --- */
.saas-container {
    width: 100%;
    max-width: 480px;
}

.saas-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: background-color 0.3s, border-color 0.3s;
}

/* --- HEADER --- */
.saas-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
}

.icon-wrapper {
    background-color: var(--icon-bg);
    color: var(--icon-color);
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.saas-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.badge {
    background-color: var(--icon-bg);
    color: var(--icon-color);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- BODY --- */
.saas-body {
    padding: 24px;
}

.saas-body p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 24px;
}

.saas-body strong {
    color: var(--text-main);
}

/* --- BUTTON --- */
.btn-primary {
    width: 100%;
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: background-color 0.2s, transform 0.1s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

/* --- FOOTER --- */
.saas-footer {
    padding: 16px 24px;
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

@media (prefers-color-scheme: dark) {
    .saas-footer {
        background-color: rgba(255, 255, 255, 0.02);
    }
}