:root {
     --bg: #0f1724;
     --card: #0b1220;
     --accent-1: #6EE7B7;
     --accent-2: #60A5FA;
     --muted: #94A3B8;
     --radius: 14px;
     --maxw: 1100px;
     font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
 }

 body {
     margin: 0;
     padding-top: 72px;
     background: linear-gradient(180deg, #071026 0%, #07122a 60%);
     color: #e6eef8;
     -webkit-font-smoothing: antialiased;
 }

 .container {
     max-width: var(--maxw);
     margin: 0 auto;
     padding: 0 24px 48px;
 }

 /* Header */
 header {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     display: flex;
     align-items: center;
     justify-content: space-around;
     background-color: rgba(7, 18, 42, 0.95);
     backdrop-filter: blur(10px);
     z-index: 1000;
     padding: 12px 24px;
     box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
 }

 .brand {
     display: flex;
     align-items: center;
     gap: 12px;
 }

 .logo {
     width: 48px;
     height: 48px;
     border-radius: 10px;
     background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
     display: flex;
     align-items: center;
     justify-content: center;
     font-weight: 700;
     color: #031024;
     flex-shrink: 0;
 }

 nav a {
     color: var(--muted);
     text-decoration: none;
     margin-left: 18px;
     transition: color 0.2s;
 }

 nav a:hover {
     color: var(--accent-1);
 }

 /* Hero */
 .hero {
     text-align: center;
     margin-top: 40px;
 }

 .hero h1 {
     font-size: 38px;
     margin-bottom: 12px;
     background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
 }

 .hero p {
     color: var(--muted);
     font-size: 18px;
     margin-bottom: 30px;
 }

 section {
     margin-top: 40px;
 }

 .card {
     background: var(--card);
     padding: 24px;
     border-radius: var(--radius);
     margin-top: 20px;
 }

 h2 {
     font-size: 28px;
     color: var(--accent-1);
     margin-bottom: 8px;
 }

 h3 {
     font-size: 20px;
     margin-bottom: 8px;
     color: var(--accent-2);
 }

 h4 {
     font-size: 16px;
     margin: 6px 0;
     color: #e6eef8;
 }

 p {
     color: var(--muted);
     line-height: 1.6;
 }

 ul {
     margin-top: 6px;
     padding-left: 18px;
     color: var(--muted);
     line-height: 1.6;
 }

 .summary {
     background: linear-gradient(90deg, rgba(96, 165, 250, 0.08), rgba(110, 231, 183, 0.05));
     border: 1px solid rgba(96, 165, 250, 0.15);
     border-radius: var(--radius);
     padding: 18px;
     margin-bottom: 20px;
     color: #e6eef8;
     text-align: left;
 }

 /* Contact form */
 .contact-section {
     margin-top: 40px;
     background: rgba(255, 255, 255, 0.03);
     padding: 30px;
     border-radius: var(--radius);
     text-align: center;
 }

 .contact-section h2 {
     color: var(--accent-1);
     margin-bottom: 18px;
 }

 .contact-form {
     display: flex;
     flex-direction: column;
     gap: 12px;
     max-width: 720px;
     margin: 0 auto;
     align-items: stretch;
 }

 .contact-form input,
 .contact-form textarea {
     background: rgba(255, 255, 255, 0.04);
     border: 1px solid rgba(255, 255, 255, 0.08);
     border-radius: 10px;
     padding: 12px;
     color: #fff;
     font-size: 15px;
     width: 100%;
     box-sizing: border-box;
 }

 .phone-row {
     display: flex;
     gap: 10px;
     align-items: center;
 }

 .phone-row input[type="tel"] {
     flex: 1;
 }

 .btn-otp {
     flex-shrink: 0;
     white-space: nowrap;
     min-width: 150px;
     padding: 10px 12px;
     border-radius: 10px;
     border: none;
     cursor: pointer;
     background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
     color: #031024;
     font-weight: 700;
 }

 .contact-form button[type="submit"] {
     background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
     border: none;
     border-radius: 10px;
     padding: 12px;
     color: #031024;
     font-weight: 700;
     cursor: pointer;
 }

 .contact-form button:disabled,
 .btn-otp:disabled {
     opacity: 0.6;
     cursor: not-allowed;
 }

 footer {
     width: 100%;
     background-color: rgba(7, 18, 42, 0.98);
     z-index: 1000;
     text-align: center;
     color: var(--muted);
     padding: 18px 0;
     border-top: 1px solid rgba(96, 165, 250, 0.1);
     margin-top: 36px;
 }

 .footer-content {
     max-width: var(--maxw);
     margin: 0 auto;
     font-size: 14px;
     line-height: 1.6;
 }

 .footer-content strong {
     color: #e6eef8;
 }

 /* Responsive */
 @media (max-width: 720px) {
     .phone-row {
         flex-direction: column;
         align-items: stretch;
     }

     .btn-otp {
         width: 100%;
     }
 }