:root {
    --primary-blue: #1877F2;      /* Facebook Blue */
    --hover-blue: #165eab;        /* Darker Blue for hover states */
    --bg-grey: #F0F2F5;           /* Light grey background */
    --panel-white: #FFFFFF;       /* Clean white for panels */
    --text-main: #1C1E21;         /* Dark grey/black for readability */
    --text-muted: #606770;        /* Muted grey for labels/subtext */
    --border-grey: #CCD0D5;       /* Subtle border color */
    --success-color: #31A24C;     /* Positive metric green */
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }

body { background-color: var(--bg-grey); color: var(--text-main); line-height: 1.6; }

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

header { text-align: center; padding: 40px 0 20px; }
header h1 { color: var(--primary-blue); font-size: 2.8rem; margin-bottom: 8px; font-weight: 800; letter-spacing: -0.5px; }
header p { color: var(--text-muted); font-size: 1.1rem; font-weight: 500; }

.ad-container { width: 100%; text-align: center; margin: 20px 0; padding: 15px; background: var(--panel-white); border: 1px solid var(--border-grey); border-radius: 8px; box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.ad-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; margin-bottom: 5px; display: block; }

.calculator-wrapper { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 20px; }

.input-panel, .results-panel { flex: 1; min-width: 320px; background: var(--panel-white); padding: 35px; border-radius: 12px; border: 1px solid var(--border-grey); box-shadow: 0 2px 10px rgba(0,0,0,0.04); }

h2 { color: var(--text-main); margin-bottom: 24px; font-size: 1.5rem; border-bottom: 2px solid var(--primary-blue); padding-bottom: 10px; display: inline-block; }

.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: var(--text-main); font-weight: 600; font-size: 0.95rem; }
input { width: 100%; padding: 14px; background: #F5F6F7; border: 1px solid var(--border-grey); color: var(--text-main); border-radius: 6px; font-size: 16px; transition: border 0.2s ease; }
input:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.2); background: var(--panel-white); }

.btn { width: 100%; padding: 16px; background: var(--primary-blue); color: var(--panel-white); border: none; font-size: 18px; font-weight: bold; cursor: pointer; border-radius: 6px; transition: background 0.3s ease; box-shadow: 0 2px 4px rgba(24, 119, 242, 0.3); }
.btn:hover { background: var(--hover-blue); }

.result-card { background: var(--bg-grey); padding: 20px; border-left: 5px solid var(--primary-blue); margin-bottom: 16px; border-radius: 6px; display: flex; justify-content: space-between; align-items: center; }
.result-card h3 { font-size: 15px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; }
.result-card .value { font-size: 26px; font-weight: 800; color: var(--primary-blue); }
.result-card.success .value { color: var(--success-color); }

.content-section { margin-top: 40px; padding: 40px; background: var(--panel-white); border-radius: 12px; border: 1px solid var(--border-grey); box-shadow: 0 2px 10px rgba(0,0,0,0.04); }
.content-section h2 { color: var(--text-main); border-bottom: none; display: block; }
.content-section h3 { color: var(--primary-blue); margin: 25px 0 10px; font-size: 1.3rem; }
.content-section p, .content-section li { margin-bottom: 16px; color: var(--text-muted); font-size: 1.05rem; }
.content-section ul, .content-section ol { padding-left: 20px; margin-bottom: 20px; }

footer { margin-top: 50px; text-align: center; padding: 40px 20px; border-top: 1px solid var(--border-grey); background: var(--panel-white); }
.footer-links a { color: var(--text-muted); text-decoration: none; margin: 0 15px; font-weight: 500; transition: color 0.2s; }
.footer-links a:hover { color: var(--primary-blue); }
.powered-by { margin-top: 25px; color: var(--primary-blue); font-weight: bold; font-size: 1.1rem; }
.copyright { color: var(--text-muted); font-size: 0.9rem; margin-top: 5px; }

/* --- Digital Raasta CTA Banner --- */
.cta-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #1877F2 0%, #0d5bb5 100%);
    color: #fff;
    padding: 30px 40px;
    border-radius: 12px;
    margin: 10px 0 30px;
    box-shadow: 0 4px 15px rgba(24, 119, 242, 0.3);
    flex-wrap: wrap;
    gap: 20px;
}
.cta-content { flex: 1; min-width: 300px; }
.cta-content h3 { color: #fff; font-size: 1.6rem; margin-bottom: 8px; border: none; padding: 0; }
.cta-content p { font-size: 1.05rem; opacity: 0.95; }
.cta-button {
    background: #fff;
    color: #1877F2;
    padding: 14px 28px;
    font-weight: bold;
    border-radius: 6px;
    text-decoration: none;
    font-size: 1.1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(0,0,0,0.2); color: #0d5bb5; }

/* --- Sub-Page Formatting (Privacy/Terms/Contact) --- */
.page-header { text-align: left; padding: 20px 0; border-bottom: 2px solid var(--border-grey); margin-bottom: 30px; }
.page-header h1 { font-size: 2.2rem; color: var(--text-main); }
.legal-content { background: var(--panel-white); padding: 40px; border-radius: 12px; border: 1px solid var(--border-grey); }
.legal-content h2 { margin-top: 30px; font-size: 1.3rem; border: none; color: var(--primary-blue); }
.nav-back { display: inline-block; margin-bottom: 20px; color: var(--primary-blue); text-decoration: none; font-weight: bold; }
.nav-back:hover { text-decoration: underline; }