:root{--color-bg: #0B1220;--color-surface: #131B2E;--color-primary: #2F6FED;--color-primary-light: #5B8DEF;--color-text: #E8ECF4;--color-text-muted: #8A94A6;--color-success: #2ECC71;--color-warning: #F5A623;--color-danger: #E74C3C;--radius: 14px;--font-sans: "Inter", system-ui, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.page{max-width:480px;margin:0 auto;min-height:100vh;padding:20px 16px 90px}.card{background:var(--color-surface);border-radius:var(--radius);padding:16px;margin-bottom:12px}.btn{background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);padding:14px 20px;font-size:15px;font-weight:600;cursor:pointer;width:100%}.text-muted{color:var(--color-text-muted);font-size:13px}.status-badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}.status-paid{background:#2ecc7126;color:var(--color-success)}.status-unpaid{background:#f5a62326;color:var(--color-warning)}.status-overdue{background:#e74c3c26;color:var(--color-danger)}